2026 in paleomalacology

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This list records new taxa of fossil molluscs that were announced or described in 2026. Other peer-reviewed publications on discoveries related to paleomalacology which occurred in that year are also detailed here.

Ammonite research

Name	Novelty	Status	Authors	Age	Type locality	Country	Notes
Ainoceras boomerangense^[1]	Sp. nov		Whittingham et al.	Late Cretaceous (Santonian)	Haslam Formation	Canada ( British Columbia)	A member of the family Nostoceratidae.
Amapondella separoannulum^[1]	Sp. nov		Whittingham et al.	Late Cretaceous (Campanian)	Haslam Formation	Canada ( British Columbia)	A member of the family Nostoceratidae.
Ceresioceltites^[2]	Gen. et comb. nov	Valid	Pieroni & Balini	Middle Triassic		Italy Switzerland	A member of the family Danubitidae. The type species is "Ammonites" fumagallii Stabile (1860); genus also includes "Celtites" paronai Airaghi (1912) and "Celtites" taramellii Airaghi (1912).
Eckhardites atmensis^[3]	Sp. nov	Valid	Mitta in Mitta, Zenina & Meleshin	Middle Jurassic (Bathonian)		Russia	A member of the family Cardioceratidae. Published online in 2026, but the issue date is listed as December 2025.
Embreeoceras^[1]	Gen. et sp. nov		Whittingham et al.	Late Cretaceous (Santonian)	Trent River Formation	Canada ( British Columbia)	A member of the family Nostoceratidae. The type species is E. retexum.
Flexoptychites gottardoi^[2]	Sp. nov	Valid	Pieroni & Balini	Middle Triassic (Anisian)		Italy	A member of the family Ptychitidae.
Leonardia^[4]	Gen. et sp. et comb. nov		Parent & Garrido	Jurassic-Cretaceous transition	Vaca Muerta	Argentina	A member of the family Himalayitidae. The type species is L. almanzaensis; genus also includes "Berriasella" steinmanni Krantz (1926). The generic name is shared with Leonardia Canefri (1890) and Leonardia Mearns (1905).
Limusoceras^[1]	Gen. et comb. et 2 sp. nov		Whittingham et al.	Late Cretaceous (Turonian to Campanian)		Canada ( British Columbia) Japan Russia ( Sakhalin Oblast) United States ( Alaska)	A member of the family Nostoceratidae. The type species is "Heteroceras" japonicum Yabe (1904) (the species was also designated as the type species of the genus Ebisuites by Cooper (2024),^[5] but Whittingham et al. (2026) do not consider this genus to be valid); genus also includes new species L. neojaponicum and L. traski.
Parasianites^[6]	Gen. et comb. nov	Valid	Leonova	Permian		United States ( Texas)	A member of the family Paragastrioceratidae. The type species is "Stenolobulites" admiralensis (Plummer & Scott, 1937); genus also includes "Stenolobulites" subglobosus Mikesh, Glenister & Furnish (1988).
Pseudosvetlanoceras^[6]	Gen. et comb. nov	Valid	Leonova	Permian	Lenox Hills Formation	United States ( Texas)	A member of the family Paragastrioceratidae; a new genus for "Svetlanoceras" moylei Mikesh (1990).
Quintucoceras^[7]	Gen. et 3 sp. et comb. nov	Valid	Parent & Garrido	Early Cretaceous (Valanginian)	Quintuco Formation	Argentina	A member of the family Neocomitidae. The type species is Q. macrospinatum; genus also includes new species Q. pseudowichmanni and Q. denticulatum, as well as "Necomites" wichmanni Leanza (1945).
Rasaites^[2]	Gen. et sp. nov	Valid	Pieroni & Balini	Middle Triassic (Anisian)		Italy	A possible member of the family Hungaritidae. The type species is R. rasaensis.
Subthurmannia pacifica^[7]	Sp. nov	Valid	Parent & Garrido	Early Cretaceous (Valanginian)	Quintuco Formation	Argentina	A member of the family Neocomitidae.

Neige & van Tiel (2026) study the evolutionary history of the family Dactylioceratidae, and interpret the pattern of changes of their taxonomic and morphological diversity as consistent with background extinction, possibly linked to species specialization making them vulnerable to such extinction.^[8]
A study on the composition of the Late Jurassic (Kimmeridgian) ammonite faunas of the subtilicaelatum and desmoides biohorizons of the Lacunosamergel Formation (Germany) is published by Jantschke et al. (2026).^[9]
Aguirre-Urreta et al. (2026) report evidence of exceptional preservation of the periostracum in specimens of Bochianites neocomiensis and Lissonia riveroi from Vaca Muerta (Argentina), interpreted as indicative of highly conservative composition of the periostracum throughout the evolutionary history of conchiferan molluscs.^[10]
Frau (2026) revises the affinities of the genera Vergunniceras and Paracheloniceras, and names a new subfamily Paracheloniceratinae within the family Douvilleiceratidae.^[11]
A study on the biostratigraphy of the Barremian-Aptian ammonite fossils from the southern edge of the Vercors Urgonian platform (France) is published by Pictet, Ferry & Pietra (2026).^[12]
Kennedy & Klinger (2026) revise the species referred to the subgenus Pervinquieria (Styphloceras), reinterpreting them all as a single variable species Pervinquieria (Pervinquieria) nodosocostata.^[13]
Hefny et al. (2026) revise the composition of Cenomanian and Turonian ammonite assemblages from the strata of the Galala and Umm Omeiyid formations at Wadi Qena (Egypt).^[14]
Bensekhria et al. (2026) study the biostratigraphy of the Albian–Turonian ammonite fossils from the Aurès Basin (Algeria) and compare the composition of the studied ammonite assemblages with those from Tunisia, Western Europe and the Western Interior Seaway, reporting evidence of differences that were likely driven by climatic gradients, marine barriers and variable migration pathways.^[15]

Other cephalopods

Name	Novelty	Status	Authors	Age	Country	Notes
Caneycycloceras fuerstenbergorum^[16]	Sp. nov	Valid	Korn & Aubrechtová	Carboniferous	Germany	A member of Orthoceratida belonging to the family Brachycycloceratidae.
Caneycycloceras rotersorum^[16]	Sp. nov	Valid	Korn & Aubrechtová	Carboniferous	Germany	A member of Orthoceratida belonging to the family Brachycycloceratidae.
Discoceras alienum^[17]	Sp. nov	Valid	Aubrechtová, Korn & Kröger	Ordovician (Katian)	Germany
Discoceras angustum^[17]	Sp. nov	Valid	Aubrechtová, Korn & Kröger	Ordovician (Sandbian or Katian)	Estonia
Discoceras aseriense^[17]	Sp. nov	Valid	Aubrechtová, Korn & Kröger	Ordovician (Darriwilian)	Estonia
Discoceras brandenburgense^[17]	Sp. nov	Valid	Aubrechtová, Korn & Kröger	Ordovician (Katian)	Germany
Discoceras circulare^[17]	Sp. nov	Valid	Aubrechtová, Korn & Kröger	Ordovician (Sandbian)	Estonia Germany
Discoceras polonicum^[17]	Sp. nov	Valid	Aubrechtová, Korn & Kröger	Ordovician (Katian)	Poland
Discoceras sovaki^[17]	Sp. nov	Valid	Aubrechtová, Korn & Kröger	Ordovician (Katian)	Germany
Lagonibelus pseudonecopinus^[18]	Sp. nov	Valid	Efremenko in Dzyuba et al.	Early Cretaceous	Russia	A belemnite belonging to the family Cylindroteuthidae.
Rhenocycloceras^[16]	Gen. et comb. et 4 sp. nov	Valid	Korn & Aubrechtová	Carboniferous	Germany Ireland Kyrgyzstan Morocco	A member of Orthoceratida belonging to the family Brachycycloceratidae. The type species is "Orthoceratites" scalaris d'Archiac & de Verneuil (1842); genus also includes "Orthoceras" randolphensis Worthen (1882), "Cycloceras" meeki Elias (1958), "Orthocera" undata Fleming (1815), "Brachycycloceras" mirabile Shimansky (1968) and "Brachycycloceras" subquadratum Shimansky (1968), as well as new species R. conicum, R. denckmanni, R. macdiarmadai and R. africanum.
Uluciala^[19]	Gen. et sp. nov	Valid	Sugiura et al.	Late Cretaceous (Campanian-Maastrichtian)	United States ( South Dakota)	A member of Decabrachia of uncertain affinities, with a morphology intermediate between those of members of Sepiida and Sepiolida. The type species is U. rotundata.
Voroneceras^[20]	Gen. et sp. nov	Valid	Shchedukhin	Devonian (Famennian)	Russia ( Lipetsk Oblast)	A member of the family Westonoceratidae. Genus includes new species V. rai.

Other cephalopod research

Evidence of impact of distribution of mineral deposits in chambered shells on buoyancy and maneuverability of orthocone cephalopods is presented by Peterman, Landman & Ciampaglio (2026).^[21]
Galácz (2026) interprets Bayanoteuthis rugifer as an Eocene belemnite.^[22]
A study on the early ontogenetic development of shells of members of the genus Boionautilus is published by Turek & Manda (2026), who place the studied genus in the family Lechritrochoceratidae, and transfer "Nautilus" sternbergi to the genus Cumingsoceras.^[23]
Evidence of nautiloid affinities of Pohlsepia mazonensis is provided by Clements et al. (2026), who interpret the studied species as a junior synonym of Paleocadmus pohli.^[24]
Fossils of members of the genus Cenoceras otherwise known from the Aalenian–Bajocian strata from Western Europe are described from the Bathonian strata from the Gnaszyn clay-pit (Poland) by Jain, Salamon & Bălc (2026), extending known geographical and stratigraphical range of the studied nautilids.^[25]
Patarroyo et al. (2026) describe new fossil material of Aturia peruviana from the Paleogene strata of the San Jacinto Formation (Colombia), and interpret their morphology as supporting the classification of Aturia colombiana as a junior synonym of A. peruviana.^[26]
Evidence from the study of extant nautiloid cephalopods and from the study of oxygen isotope shell thermometry of nautiloid fossils, indicating that modern nautiloids live deeper and grow in colder water than any of their extinct relatives other than members of the genus Aturia, is presented by Ward et al. (2026).^[27]
New pseudorthocerid and aulacocerid fossil material is described from the Middle Triassic (Anisian) strata of the Rifu Formation (Japan) by Niko & Ehiro (2026).^[28]
Sealey & Lucas (2026) revise the fossil record of Cretaceous ammonites and nautiloids from New Mexico (United States).^[29]
Evidence from the study of fossil material of Nanaimoteuthis jeletzkyi and "Paleocirroteuthis" haggarti (transferred to the genus Nanaimoteuthis) from the Cretaceous strata in Canada and Japan, indicating that Nanaimoteuthis was an octopus belonging to the group Cirrata and that members of this genus were some of the largest known invertebrates and among the largest known Cretaceous marine predators, is presented by Ikegami et al. (2026).^[30]

Bivalves

Name	Novelty	Status	Authors	Age	Type locality	Location	Notes
?Africogryphaea geniculata^[31]	Sp. nov		Sadji et al.	Late Jurassic		Algeria
Bicornucopina acuminata^[32]	Sp. nov	Valid	Masse et al.	Early Cretaceous (Barremian-Aptian)		France	A member of the family Monopleuridae.
Botula kaeoensis^[33]	Sp. nov		Eagle in Eagle & Hayward	Eocene	Ruatangata Sandstone	New Zealand	A species of Botula.
Concavodonta varius^[34]	Sp. nov	Valid	Wang, Zhan & Fang	Ordovician (Katian)	Xiazhen Formation	China	A member of the family Praenuculidae.
Cyathodonta gilardeti^[35]	Nom. nov	Valid	Pacaud in Pacaud et al.	Eocene		France	A species of Cyathodonta; a replacement name for Thracia rugosa Bellardi (1852).
Cyathodonta tarbelliana^[35]	Sp. nov	Valid	Pacaud et al.	Eocene	Brassempouy Limestone	France	A species of Cyathodonta.
Eoplicatula nianduoensis^[36]	Sp. nov		Li et al.	Early Jurassic (Hettangian)	Germig Formation	China
Fidera flexa^[37]	Sp. nov		Wang et al.	Ordovician	Koumenzi Formation	China
?Gafrarium troendlei^[38]	Sp. nov	Valid	Merle in Salvat et al.	Plio-Pleistocene		French Polynesia	A member of the family Veneridae.
Homopleura parva^[32]	Sp. nov	Valid	Masse et al.	Early Cretaceous (Aptian)		France	A member of the family Monopleuridae.
Horiopleura arabica^[39]	Sp. nov	Valid	Masse et al.	Early Cretaceous (Aptian)	Qishn Formation	Oman	A member of the family Polyconitidae.
Horiopleura helviorum^[39]	Sp. nov	Valid	Masse et al.	Early Cretaceous (Aptian)		France	A member of the family Polyconitidae.
Hypelasma fritzlangi^[40]	Sp. nov	Valid	Schneider & Werner	Late Jurassic (Kimmeridgian)	Frankenalb Formation	Germany	A rudist bivalve belonging to the family Requieniidae.
Indotellina fakaauensis^[38]	Sp. nov	Valid	Merle in Salvat et al.	Plio-Pleistocene		French Polynesia	A member of the family Tellinidae.
Isoarca minima^[41]	Sp. nov		Ayoub-Hannaa & Fürsich in Ayoub-Hannaa, Fürsich & Abdelhady	Middle Jurassic (Bathonian to Callovian)	Kehailia Formation	Egypt	A member of Nuculanida belonging to the family Isoarcidae.
Liostrea paucistriata^[41]	Sp. nov		Ayoub-Hannaa & Fürsich in Ayoub-Hannaa, Fürsich & Abdelhady	Middle Jurassic (Bajocian to Callovian)	Kehailia Formation	Egypt
?Lunulicardia distorta^[38]	Sp. nov	Valid	Merle in Salvat et al.	Plio-Pleistocene		French Polynesia	Possibly a species of Lunulicardia.
Margaritifera araujensis^[42]	Sp. nov		Delvene & Munt in Delvene et al.	Early Cretaceous (Albian)	Escucha Formation	Spain	A species of Margaritifera.
Mazaevella^[43]	Gen. et comb. nov	Valid	Shilekhin, Biakov & Vdovichenko	Carboniferous-Permian (Gzhelian-Sakmarian)		Russia	A member of Pectinida belonging to the family Annuliconchidae. The type species is "Annuliconcha" placunensis Nelzina (1958). Published online in 2026, but the issue date is listed as December 2025.
Myostyla^[32]	Gen. et sp. nov	Valid	Masse et al.	Early Cretaceous (Aptian)		France	A member of the family Monopleuridae. The type species is M. ardescensis.
Palaeoneilo rectus^[34]	Sp. nov	Valid	Wang, Zhan & Fang	Ordovician (Katian)	Xiazhen Formation	China	A member of the family Cucullellidae.
Praecaprina paquieri^[32]	Sp. nov	Valid	Masse et al.	Early Cretaceous (Aptian)		France	A member of the family Caprinidae.
Praecaprina tubifera^[32]	Sp. nov	Valid	Masse et al.	Early Cretaceous (Aptian)		France	A member of the family Caprinidae.
Praecaprina vacua^[32]	Sp. nov	Valid	Masse et al.	Early Cretaceous (Aptian)		France	A member of the family Caprinidae.
Protocardia magharensis^[41]	Sp. nov		Ayoub-Hannaa & Fürsich in Ayoub-Hannaa, Fürsich & Abdelhady	Middle Jurassic (Bathonian)	Kehailia Formation	Egypt
Protopotomida^[42]	Gen. et sp. nov		Delvene & Munt in Delvene et al.	Early Cretaceous (Albian)	Escucha Formation	Spain	A member of the family Unionidae. The type species is P. ariniensis.
Pseudexogyra^[31]	Gen. et sp. nov		Sadji et al.	Late Jurassic		Algeria	Genus includes new species P. euryhalina.
Saalidiceras^[40]	Gen. et sp. nov	Valid	Schneider & Werner	Late Jurassic (Kimmeridgian)	Frankenalb Formation	Germany	A rudist bivalve belonging to the family Epidiceratidae. The type species is S. syllai.
Similodonta minor^[34]	Sp. nov	Valid	Wang, Zhan & Fang	Ordovician (Katian)	Xiazhen Formation	China	A member of the family Similodontidae.
Syncyclonema goyi^[44]	Sp. nov	Valid	Callapez, Barroso-Barcenilla, Berrocal-Casero & Pimentel in Callapez et al.	Late Cretaceous (Cenomanian)	Trouxemil Formation	Portugal	A member of the family Entoliidae.
Thracia sixi^[35]	Sp. nov	Valid	Pacaud et al.	Eocene	Brassempouy Limestone	France	A species of Thracia.
Trigonoconcha brevis^[34]	Sp. nov	Valid	Wang, Zhan & Fang	Ordovician (Katian)	Xiazhen Formation	China	A member of the family Similodontidae.
"Unio" escuchana^[42]	Sp. nov		Delvene & Munt in Delvene et al.	Early Cretaceous (Albian)	Escucha Formation	Spain	A member of the family Unionidae.
Valclusella^[32]	Gen. et 2 sp. nov	Valid	Masse et al.	Early Cretaceous (Barremian-Aptian)		France	A member of the family Monopleuridae. The type species is V. valclusensis; genus also includes V. biconvexa.

Bivalve research

Evidence of utility of the study of rudist shells from the Maastrichtian Cárdenas Formation (Mexico) in reconstruction of environmental conditions in the western Tethys Ocean during the Cretaceous is presented by Juárez-Aguilar et al. (2026).^[45]
Pérez, Mosquera & Cuitiño (2026) report the discovery of fossil material of Limopsis insolita from the Miocene Gaiman Formation (Argentina), extending its known geographic distribution northwards and representing the first unambiguous record of a member of the genus Limopsis in deeper-water settings in the region.^[46]
Knight (2026) studies the composition of two assemblages of Miocene (Tortonian) bivalves from S'Algar (Menorca, Spain), interpreted as originating from a middle ramp environment that changed through time as a result of changes in the frequency and directionality of storms and currents.^[47]
Amano, Hamuro & Hamuro (2026) describe new fossil material of Nipponocrassatella osawanoensis and "Oxyperas" osawanoensis from the Miocene strata of the Kurosedani Formation (Japan), and allocate the latter species to the genus Pseudoxyperas.^[48]
Amano (2026) describes new thyasirid and vesicomyid fossil material from the Pleistocene strata of the Umegase Formation (Japan), transfers "Thyasira" inflata Yabe & Nomura (1925) to the genus Maorithyas, and coins a replacement name Mendicula angolensis for the extant species Thyasira (Mendicula) inflata Payne & Allen (1991).^[49]
Osipova et al. (2026) revise the composition of the venerid assemblage from the Pleistocene Szekou Formation (Taiwan).^[50]
Evidence from the study of bivalves from the Pleistocene and Holocene strata from Florida (United States) and Italy, indicating that trematode infestation caused abnormal morphological development of shells of affected bivalves and that hampers species delineation and morphometric analyses of fossil bivalves, is presented by Jang et al. (2026).^[51]

Gastropods

Name	Novelty	Status	Authors	Age	Type locality	Location	Notes
Acrostemma anatolica^[52]	Sp. nov	Valid	Harzhauser, Landau & Malaquias	Miocene	Týrtar Formation	Turkey	A member of the family Cylichnidae.
Acteon antipinguis^[52]	Sp. nov	Valid	Harzhauser, Landau & Malaquias	Miocene	Grund Formation	Austria Hungary Poland Romania	A species of Acteon.
Acteon gutta^[52]	Sp. nov	Valid	Harzhauser, Landau & Malaquias	Miocene	Dej Formation	Hungary Romania	A species of Acteon.
Acteon romanicus^[52]	Sp. nov	Valid	Harzhauser, Landau & Malaquias	Miocene	Dej Formation	Romania	A species of Acteon.
Acteon trifasciatus^[52]	Sp. nov	Valid	Harzhauser, Landau & Malaquias	Miocene	Grund Formation	Austria Germany?	A species of Acteon.
Acteon viciani^[52]	Sp. nov	Valid	Harzhauser, Landau & Malaquias	Miocene	Pétervására Formation	Hungary	A species of Acteon.
Acteon vindobonensis^[52]	Sp. nov	Valid	Harzhauser, Landau & Malaquias	Miocene	Baden Formation	Austria	A species of Acteon.
Acteonella murcielaguensis^[53]	Sp. nov	Valid	Aguilar et al.	Late Cretaceous (Maastrichtian)	El Viejo Formation	Costa Rica
Amplogladius wrigleyi^[54]	Nom. nov	Valid	Kovács et al.			United Kingdom	A member of the family Rostellariidae.
Angaria dalmadeakae^[54]	Sp. nov	Valid	Kovács et al.	Eocene		Hungary	A species of Angaria.
Angulariopsis^[55]	Gen. et comb. nov	Valid	Monari et al.	Late Triassic (Rhaetian) and Early Jurassic (Hettangian)		Austria France Luxembourg	A member of the family Purpurinidae. The type species is "Angularia" nivernensis Dareste de la Chavanne (1912); genus also includes "Angularia" corallina Nützel et al. (2022).
Anthracocycla^[56]	Gen. et sp. et comb. nov	Valid	Matamales-Andreu	Eocene and Oligocene	Peguera Formation	Spain	A possible member of the family Helicodontidae. The type species is A. decipiens; genus also includes "Lychnosis" hermitei Vidal (1917).
Anularya bengu^[57]	Sp. nov	Valid	Xiang, Wang, He & Lv in Xiang et al.	Neogene	Xiaolongtan Formation	China	A species of Anularya.
Athleta szumzeri^[54]	Sp. nov	Valid	Kovács et al.	Eocene		Hungary	A species of Athleta.
Bezanconia zsuzsannae^[54]	Sp. nov	Valid	Kovács et al.	Eocene		Hungary	A member of the family Cerithiidae.
Bittium biskupici^[58]	Sp. nov	Valid	Harzhauser & Landau	Miocene	Baden Formation	Austria	A species of Bittium.
Bittium castori^[58]	Sp. nov	Valid	Harzhauser & Landau	Miocene	Dej Formation	Romania	A species of Bittium.
Bittium pallgergelyi^[58]	Sp. nov	Valid	Harzhauser & Landau	Miocene	Baden Formation	Austria	A species of Bittium.
Bittium parvapyramis^[58]	Sp. nov	Valid	Harzhauser & Landau	Miocene		Ukraine	A species of Bittium.
Bittium polluxi^[58]	Sp. nov	Valid	Harzhauser & Landau	Miocene	Dej Formation	Romania	A species of Bittium.
Bourguetia bipartita^[55]	Sp. nov	Valid	Monari et al.	Early Jurassic (Hettangian)	Luxembourg Sandstone	Luxembourg	A member of the family Pseudomelaniidae.
Brouchilda^[55]	Gen. et 2 sp. et comb. nov	Valid	Monari et al.	Early Jurassic (Hettangian)	Luxembourg Sandstone	France Luxembourg	A member of the family Mathildidae. The type species is B. laevigata; genus also includes new species B. mulleri, as well as "Promathildia" bicarinata Dareste de la Chavanne (1912).
Bulla? elalbanii^[52]	Sp. nov	Valid	Harzhauser, Landau & Malaquias	Miocene		Ukraine	Possibly a species of Bulla.
Bulla niauensis^[38]	Sp. nov	Valid	Merle in Salvat et al.	Plio-Pleistocene		French Polynesia	A species of Bulla.
Calliostoma gallaensis^[54]	Sp. nov	Valid	Kovács et al.	Eocene		Hungary	A species of Calliostoma.
Calliostoma radoslavi^[54]	Sp. nov	Valid	Kovács et al.	Eocene		Hungary	A species of Calliostoma.
Campanile metaisi^[59]	Sp. nov	Valid	Merle & Pacaud in Merle et al.	Eocene	Lakhra Formation	Pakistan	A species of Campanile.
Campanistylus^[59]	Gen. et sp. nov	Valid	Merle & Pacaud in Merle et al.	Eocene	Lakhra Formation	Pakistan	A member of the family Campanilidae. The type species is C. lakhraensis.
Carboathleta^[54]	Gen. et comb. nov	Valid	Kovács et al.	Eocene		Hungary	The type species is "Voluta" pseudobulbosa Strausz (1966).
Cerithium bardhani^[60]	Sp. nov	Valid	Bose et al.	Miocene	Gaj Formation	India	A species of Cerithium.
Cerithium niauense^[38]	Sp. nov	Valid	Merle in Salvat et al.	Pliocene to late Holocene		French Polynesia	A species of Cerithium.
Chelidonura piseraii^[52]	Sp. nov	Valid	Harzhauser, Landau & Malaquias	Miocene	Pińczów Formation	Poland	A species of Chelidonura.
Chelotia academia^[54]	Sp. nov	Valid	Kovács et al.	Eocene		Hungary	A member of the family Pleurotomariidae.
Cipangopaludina somnumbra^[57]	Sp. nov	Valid	Xiang, Wang, He & Xie in Xiang et al.	Neogene	Ciying Formation	China	A species of Cipangopaludina.
?Clelandella saurashtraensis^[60]	Sp. nov	Valid	Bose et al.	Miocene	Gaj Formation	India	Possibly a species of Clelandella.
Colombellina crassigranulata^[61]	Sp. nov	Valid	Bakayeva et al.	Late Jurassic		Bulgaria	A member of the family Colombellinidae.
Colubratriton istvangurdoni^[54]	Sp. nov	Valid	Kovács et al.	Eocene		Hungary	A member of the family Cancellariidae.
Conotomaria stoliczkai^[62]	Sp. nov		Ghosh et al.	Late Cretaceous		India	A member of the family Pleurotomariidae.
Conus georgesrichardi^[38]	Sp. nov	Valid	Merle in Salvat et al.	Plio-Pleistocene		French Polynesia	A species of Conus.
Conus letourneuxi^[38]	Sp. nov	Valid	Merle in Salvat et al.	Plio-Pleistocene		French Polynesia	A species of Conus.
Cylichna caudex^[52]	Sp. nov	Valid	Harzhauser, Landau & Malaquias	Miocene	Grund Formation	Austria Hungary Poland	A species of Cylichna.
Cylichna dolium^[52]	Sp. nov	Valid	Harzhauser, Landau & Malaquias	Miocene	Baden Formation	Austria Czech Republic	A species of Cylichna.
Cylichna eschnerae^[52]	Sp. nov	Valid	Harzhauser, Landau & Malaquias	Miocene		Czech Republic	A species of Cylichna.
Cylichna miosimplex^[52]	Sp. nov	Valid	Harzhauser, Landau & Malaquias	Miocene	Baden Formation	Austria Czech Republic	A species of Cylichna.
Cylichna steiningeri^[52]	Sp. nov	Valid	Harzhauser, Landau & Malaquias	Miocene	Fels Formation	Austria	A species of Cylichna.
Cylichna straussi^[52]	Sp. nov	Valid	Harzhauser, Landau & Malaquias	Miocene	Fels Formation	Austria	A species of Cylichna.
Dakshinatomaria^[62]	Gen. et sp. nov		Ghosh et al.	Late Cretaceous		India	A member of the family Pleurotomariidae. Genus includes new species D. rajendrai.
Dalipaludina zhaolu^[57]	Sp. nov	Valid	Xiang, Wang, He & Chen in Xiang et al.	Neogene	Ciying Formation	China	A member of the family Viviparidae.
Digitolabrum juttae^[54]	Sp. nov	Valid	Kovács et al.	Eocene		Hungary
Endopachychilus liveranii^[54]	Sp. nov	Valid	Kovács et al.	Eocene		Hungary
Ensaimadina^[56]	Gen. et 2 sp. nov	Valid	Matamales-Andreu	Oligocene	Cala Blanca Formation	Spain	A possible member of the family Helicodontidae. The type species is E. mallorquina; genus also includes E. bauzai.
Eoconus dudarensis^[54]	Sp. nov	Valid	Kovács et al.	Eocene		Hungary
Eoconus konradi^[54]	Sp. nov	Valid	Kovács et al.	Eocene		Hungary
Epalxis martae^[54]	Sp. nov	Valid	Kovács et al.	Eocene		Hungary
Episcomitra gradata^[63]	Sp. nov	Valid	Demyanov & Pacaud	Eocene		Ukraine	A species of Episcomitra.
Falsathleta^[54]	Gen. et sp. nov	Valid	Kovács et al.	Eocene		Hungary	Genus includes new species F. zoltani.
Ficatrivia eszterae^[54]	Sp. nov	Valid	Kovács et al.	Eocene		Hungary
Ficus nexilis hungarica^[54]	Ssp. nov	Valid	Kovács et al.	Eocene		Hungary	A member of the family Ficidae.
Gibbula strauszi^[54]	Sp. nov	Valid	Kovács et al.	Eocene		Hungary	A species of Gibbula.
Globularia delsatei^[55]	Sp. nov	Valid	Monari et al.	Early Jurassic (Hettangian)	Luxembourg Sandstone	Luxembourg
Globulocerithium gallaense^[54]	Sp. nov	Valid	Kovács et al.	Eocene		Hungary	A member of the family Cerithiidae.
Gruendelifusus^[55]	Gen. et sp. nov	Valid	Monari et al.	Early Jurassic (Hettangian)	Luxembourg Sandstone	Luxembourg	A possible member of the superfamily Mathildoidea. The type species is G. melusinae.
Harzhauseria^[54]	Gen. et sp. nov	Junior homonym	Kovács et al.	Eocene		Hungary	A member of the family Batillariidae. Genus includes new species H. hungarica. The generic name is preoccupied by Harzhauseria Neubauer & Wesselingh (2023).
Hemiconus arpadzsoldosi^[54]	Sp. nov	Valid	Kovács et al.	Eocene		Hungary
Jujubinus dwarkaensis^[60]	Sp. nov	Valid	Bose et al.	Miocene	Gaj Formation	India	A species of Jujubinus.
Jurazyga^[55]	Gen. et comb. nov	Valid	Monari et al.	Early Jurassic (Hettangian and Pliensbachian)		France Italy Luxembourg	A member of the family Zygopleuridae. The type species is "Melania" theodori Terquem (1855); genus also includes "Zygopleura" subnodosa (d'Orbigny 1850), "Zygopleura" vinosimonensis Fischer & Weber (1997), "Chemnitzia" polyplecta Gemmellaro (1878), "Chemnitzia" moorei Gemmellaro (1878), "Chemnitzia" appenninica Gemmellaro (1878) and "Chemnitzia" veturia Gemmellaro (1878).
Kaimella^[55]	Gen. et sp. nov	Valid	Monari et al.	Early Jurassic (Hettangian)	Luxembourg Sandstone	Luxembourg	A possible member of the family Cimidae. The type species is K. tenuilineata.
Lychnopsis applanata^[56]	Sp. nov	Valid	Matamales-Andreu	Oligocene	Cala Blanca Formation	Spain	A possible member of the family Helicodontidae.
Lychnopsis juarezi^[56]	Sp. nov	Valid	Matamales-Andreu	Oligocene	Cala Blanca Formation	Spain	A possible member of the family Helicodontidae.
Lyrofusus veberi^[54]	Sp. nov	Valid	Kovács et al.	Eocene		Hungary
Megalovicetia^[54]	Gen. et comb. nov	Valid	Kovács et al.	Eocene		France Hungary Italy	A member of the family Cypraeidae. The type species is "Vicetia" bizzottoi Dominici, Fornasiero & Giusberti (2020); genus also includes "Ovula" bellardii Bellardi (1852).
Metaconulus evanicsi^[54]	Sp. nov	Valid	Kovács et al.	Eocene		Hungary
Microschiza pauciornata^[55]	Sp. nov	Valid	Monari et al.	Early Jurassic (Hettangian)	Luxembourg Sandstone	Luxembourg	A member of the family Purpuroideidae.
Miracypraea^[64]	Gen. et 2 sp. nov	Valid	Pacaud, Gómez-García & Celzard	Eocene		Hungary Spain	A member of the superfamily Cypraeoidea belonging to the family Eocypraeidae. The type species is M. alluensis; genus also includes M. zitae Kovács et al.^[54]
Nassarius anisi^[60]	Sp. nov	Valid	Bose et al.	Miocene	Gaj Formation	India	A species of Nassarius.
Neubaueriella^[52]	Gen. et comb. nov	Valid	Harzhauser, Landau & Malaquias	Miocene		Austria Czech Republic Hungary Romania Slovakia	A member of the family Haminoeidae; a new genus for "Atys (Alicula)" lapugyensis Berger (1949).
Oonia feidtorum^[55]	Sp. nov	Valid	Monari et al.	Early Jurassic (Hettangian)	Luxembourg Sandstone	Luxembourg	A member of the family Ampullinidae.
Oonia haasi^[55]	Sp. nov	Valid	Monari et al.	Early Jurassic (Hettangian)	Luxembourg Sandstone	Luxembourg	A member of the family Ampullinidae.
Parietiplicatum kalaallitianum^[65]	Sp. nov	Valid	Pacaud	Paleocene	Agatdal Formation	Greenland	A member of the family Acteonidae.
Parietiplicatum tanasi^[65]	Nom. nov	Valid	Pacaud	Late Cretaceous (Campanian-Maastrichtian)		United States ( Tennessee)	A member of the family Acteonidae; a replacement name for Acteon conicus Wade (1926).
Parietiplicatum tenuistriatum^[65]	Sp. nov	Valid	Pacaud	Paleocene	Agatdal Formation	Greenland	A member of the family Acteonidae.
Priscoficus laszloi^[54]	Sp. nov	Valid	Kovács et al.	Eocene		Hungary
Pseudavena bella^[52]	Sp. nov	Valid	Harzhauser, Landau & Malaquias	Miocene		Czech Republic	A member of Heterobranchia of uncertain affinities.
Pyrunculus microromanicus^[52]	Sp. nov	Valid	Harzhauser, Landau & Malaquias	Miocene	Dej Formation	Romania	A member of the family Retusidae.
Pyrunculus szobiensis^[52]	Sp. nov	Valid	Harzhauser, Landau & Malaquias	Miocene		Austria Hungary	A member of the family Retusidae.
Pyrunculus zuschini^[52]	Sp. nov	Valid	Harzhauser, Landau & Malaquias	Miocene	Baden Formation	Austria Romania	A member of the family Retusidae.
Retusa mystica^[52]	Sp. nov	Valid	Harzhauser, Landau & Malaquias	Miocene	Dej Formation	Austria Hungary Romania Slovakia	A species of Retusa.
Rictaxis austriacus^[52]	Sp. nov	Valid	Harzhauser, Landau & Malaquias	Miocene	Grund Formation	Austria	A species of Rictaxis.
Rictaxis siedli^[52]	Sp. nov	Valid	Harzhauser, Landau & Malaquias	Miocene	Baden Formation	Austria	A species of Rictaxis.
Rictaxis ursulae^[52]	Sp. nov	Valid	Harzhauser, Landau & Malaquias	Miocene	Grund Formation	Austria	A species of Rictaxis.
Ringicula daisyae^[52]	Sp. nov	Valid	Harzhauser, Landau & Malaquias	Miocene	Dej Formation	Romania	A species of Ringicula.
Roxania bomba^[52]	Nom. nov	Valid	Harzhauser, Landau & Malaquias	Miocene		Austria	A species of Roxania; a replacement name for Sabatia callifera helvetica Berger (1949).
Roxania oviformis^[52]	Sp. nov	Valid	Harzhauser, Landau & Malaquias	Miocene	Baden Formation	Austria	A species of Roxania.
Roxania pila^[52]	Sp. nov	Valid	Harzhauser, Landau & Malaquias	Miocene	Dej Formation	Romania	A species of Roxania.
Sabatia quasimodoi^[52]	Sp. nov	Valid	Harzhauser, Landau & Malaquias	Miocene		Czech Republic	A species of Sabatia.
Scaphander alatissimus^[52]	Sp. nov	Valid	Harzhauser, Landau & Malaquias	Miocene	Grund Formation	Austria	A species of Scaphander.
Scaphander catena^[52]	Sp. nov	Valid	Harzhauser, Landau & Malaquias	Miocene	Dej Formation	Romania Bosnia and Herzegovina?	A species of Scaphander.
Scaphander krijgsmani^[52]	Sp. nov	Valid	Harzhauser, Landau & Malaquias	Miocene	Dej Formation	Romania	A species of Scaphander.
Scaphander perforatus^[52]	Sp. nov	Valid	Harzhauser, Landau & Malaquias	Miocene	Baden Formation	Austria Czech Republic	A species of Scaphander.
Scaphander schollnbergeri^[52]	Sp. nov	Valid	Harzhauser, Landau & Malaquias	Miocene		Czech Republic Hungary?	A species of Scaphander.
Tangarilda darestei^[55]	Sp. nov	Valid	Monari et al.	Early Jurassic (Hettangian)	Luxembourg Sandstone	Luxembourg	A member of the family Mathildidae.
Tchangmargarya ashimaae^[57]	Sp. nov	Valid	Xiang, Wang, He & Chen in Xiang et al.	Quaternary	Ciying Formation	China	A member of the family Viviparidae.
Tchangmargarya buhou^[57]	Sp. nov	Valid	Xiang, Wang, He & Chen in Xiang et al.	Neogene	Ciying Formation	China	A member of the family Viviparidae.
Tchangmargarya cunshan^[57]	Sp. nov	Valid	Xiang, Wang, He & Lv in Xiang et al.	Quaternary	Ciying Formation	China	A member of the family Viviparidae.
Tchangmargarya laojin^[57]	Sp. nov	Valid	Xiang, Wang, He & Chen in Xiang et al.	Neogene	Ciying Formation	China	A member of the family Viviparidae.
Tchangmargarya liyoufui^[57]	Sp. nov	Valid	Xiang, Wang, He & Chen in Xiang et al.	Quaternary	Ciying Formation	China	A member of the family Viviparidae.
Tchangmargarya luyizhii^[57]	Sp. nov	Valid	Xiang, Wang, He & Chen in Xiang et al.	Quaternary	Ciying Formation	China	A member of the family Viviparidae.
Tchangmargarya mohou^[57]	Sp. nov	Valid	Xiang, Wang, He & Chen in Xiang et al.	Neogene	Ciying Formation	China	A member of the family Viviparidae.
Tchangmargarya sparkleae^[57]	Sp. nov	Valid	Xiang, Wang, He & Chen in Xiang et al.	Quaternary	Ciying Formation	China	A member of the family Viviparidae.
Tchangmargarya yangjizhoui^[57]	Sp. nov	Valid	Xiang, Wang, He & Chen in Xiang et al.	Neogene	Ciying Formation	China	A member of the family Viviparidae.
Tchangmargarya yumi^[57]	Sp. nov	Valid	Xiang, Zha, He & Chen in Xiang et al.	Quaternary	Ciying Formation	China	A member of the family Viviparidae.
Tchangmargarya zhangxianmingi^[57]	Sp. nov	Valid	Xiang, Zha, He & Chen in Xiang et al.	Neogene	Ciying Formation	China	A member of the family Viviparidae.
Turritelloidea? bockfielsensis^[55]	Sp. nov	Valid	Monari et al.	Early Jurassic (Hettangian)	Luxembourg Sandstone	Luxembourg	A member of the family Gordenellidae.
Unitas stipii^[54]	Sp. nov	Valid	Kovács et al.	Eocene		Hungary
Unitas vargai^[54]	Sp. nov	Valid	Kovács et al.	Eocene		Hungary
Vermetus jyllandensis^[66]	Sp. nov	Valid	Kočí et al.	Oligocene	Brejning Formation	Denmark	A species of Vermetus.
Wadeina^[61]	Gen. et comb. nov	Valid	Bakayeva et al.	Late Cretaceous (Campanian)	Coon Creek Formation	United States ( Mississippi Tennessee)	A member of the family Personidae. The type species is "Colombellina" americana Wade (1926).
Zikkuratia saqqaqana^[65]	Sp. nov	Valid	Pacaud	Paleocene	Agatdal Formation	Greenland	A member of the family Retusidae.
Zitaia^[54]	Gen. et sp. nov	Valid	Kovács et al.	Eocene		Hungary	Genus includes new species Z. szilviae.

Gastropod research

Evidence of a southward expansion of nerineoid gastropods from the Boreal Realm into the Tethyan Realm during the Jurassic period is presented by Leshno Afriat, Rabinovich & Edelman-Furstenberg (2026).^[67]
Li, Xiao & Yu (2026) report the discovery of new fossil material of Coptocheilus electrothauma (originally named Schistoloma electrothauma) from the Cretaceous amber from Myanmar, and revise the diagnostic traits of this species.^[68]
The first known fossils of members of extant species Lanayrella vagabunda are reported from the Miocene strata of the Monte León Formation (Argentina) by Di Luca & Pastorino (2026).^[69]
Osipova & Lin (2026) study the composition of the assemblage of pelagic gastropods from the Pleistocene strata of the Szekou Formation (Taiwan), and find no evidence of significant spatial and temporal separation of Pleistocene holoplanktonic gastropod assemblages from different parts of the Indo–West Pacific region.^[70]

Other molluscs

Name	Novelty	Status	Authors	Age	Type locality	Location	Notes
Cadulus scarabinorum^[71]	Sp. nov	Valid	Roco-Villablanca, Rivadeneira & Nielsen	Miocene	Lacui Formation	Chile	A tusk shell, a species of Cadulus.
Dischides nor^[71]	Sp. nov	Valid	Roco-Villablanca, Rivadeneira & Nielsen	Miocene	Lacui Formation	Chile	A tusk shell, a species of Dischides.
Fissidentalium taverai^[71]	Sp. nov	Valid	Roco-Villablanca, Rivadeneira & Nielsen	Miocene	Lacui Formation	Chile	A tusk shell, a species of Fissidentalium.
Polyschides pichi^[71]	Sp. nov	Valid	Roco-Villablanca, Rivadeneira & Nielsen	Miocene	Lacui Formation	Chile	A tusk shell, a species of Polyschides.

General research

Evidence from the study of the molluscan fossil record, indicative of higher frequency of origination of unique and first occurrences of repeated phenotypes during the first 96 million years of the evolutionary history of the group (in the Cambrian and Ordovician) than during the remaining 444 million years of their history, is presented by Vermeij & Thomson (2026).^[74]
A study on the fossil record of bivalves and gastropods from the North American Pacific coast ranging from the Late Cretaceous to the Eocene, providing evidence of loss of morphological diversity after the Cretaceous–Paleogene extinction event and a recovery during the Paleocene, is published by Contreras-Figueroa, Hendy & Aragón (2026).^[75]
Morales-Ortega & González-Barba (2026) study the impact climate and environmental changes on composition of Eocene molluscan assemblages from North and South America, reporting evidence of faunal exchanges between the Atlantic, Pacific and Caribbean Sea, and evidence indicating that peaks of molluscan biodiversity coincided with hyperthermal events.^[76]
Bellosi et al. (2026) revise the age and distribution of the molluscan assemblages from Patagonia living at the time of the Chattian-Langhian marine incursions into southern South America, and provide calibrated dating of the youngest fauna dominated by tropical species.^[77]
A study on the fossil record of late Neogene bivalves and gastropods from the Atlantic coast of North America, providing evidence of links between basal metabolic rates and extinction patterns of the studied molluscs, is published by Rojas-Ariza, Strotz & Lieberman (2026).^[78]
Evidence from the study of the fossil record of molluscs from the East Pisco Basin on the Peruvian continental margin ranging from the late Miocene to the present, indicative of a major faunal shift between 6 and 4 million years ago, is presented by Medina-Franco et al. (2026).^[79]
DeVries (2026) studies the composition of late Pliocene and Pleistocene marine molluscan assemblages from northwestern Peru, and reports evidence of a shift from a cool-water to warm-water fauna during the Pleistocene that might have been linked to uplift of the coastal plain and/or altered equatorial circulation.^[80]
Betz et al. (2026) evaluate functional traits of Pliocene-Holocene bivalves and gastropods from the West Atlantic, finding no evidence of a significant association of the studied traits with increased extinction risk of the studied molluscs.^[81]