Mesones Group
Geologic formation in Spain
From Wikipedia, the free encyclopedia
The Mesones Group is a Cambrian geologic group in Spain. It preserves numerous soft-bodied and hard-shelled taxa such as echinoderms and trilobites. It is often stated to contain the Mansilla, Murero and Valdemiedes Formations, however just as often the Murero Formation is used to refer to the entire group, with the main lagerstätte being placed interchangeably in Mansilla, the "broader" Murero or occasionally a broader Valdemiedes.[1]
Paleobiota
Color key
|
Notes Uncertain or tentative taxa are in small text; |
| Paleobiota | |||||
|---|---|---|---|---|---|
| Genus | Species | Higher taxon | Notes | Images | |
| Ctenoimbricata | C. spinosa | Echinodermata | Most basal known echinoderm, completely bilateral unlike modern forms[2] |  | |
| Dibrachicystis | D. purujoensis | Rhombifera | Bears unusual appendages, suggesting blastozoan and crinoid "arms" come from the same source[3] | ||
| Vizcainoia | V. moncaiensis | Rhombifera | Formerly placed inside Eocystites[3] | ||
| Protorophus | P. hispanicus | Edrioasteroidea | Earliest known member of Isorophidae[4] |  | |
| Graciacystis | G. ambigua | Cincta | Basal cinctan, known from over a hundred specimens of different ages[5] | ||
| Aragocystites | A. belli | Edrioasteroidea | A relatively basal edrioasteroid, related to Cambraster[6] | ||
| Cambraster | C. tastudorum | Edrioasteroidea | First edrioasteroid found in Spain[7] | ||
| Protocinctus | P. mansillaensis | Cincta | Earliest known cinctan genus[1] | _Protocinctus.jpg) | |
| Gogia | G. parsleyi | Eocrinoidea | Oldest records of the genus from Gondwana[8] |  | |
| Rhopalocystis? | ?R. mesonesensis | Eocrinoidea | Unclear whether it even belongs to the genus[9] | ||
| Gyrocystis | G. platessa, G. erecta, G. testudiformis, G. badulesiensis?[10] | Cincta | A relatively diverse cinctan |  | |
| Caryosyntrips | C. cf. camurus[11] | Panarthropoda | Frontal appendages (the only part known) formerly identified as the lobopodian "Mureropodia apae"[12] |  | |
| Tuzoia | T. isuelaensis[13] | Hymenocarina | Only known from carapaces, alongside an indeterminate euarthropod[14] |  | |
| Wimanicharion | W. matthewi[15] | Bradoriida | Also known from Sweden and Canada | ||
| Naraoia | N. sp. | Naraoiidae | Some of the first evidence of Naraoia in Europe[16] |  | |
| Peronopsis | P. ferox, P. insignis,[17] P. longinqua[18] | Agnostida | An incredibly common agnostid from all over the world |  | |
| Condylopyge | C. cruzensis[18] | Condylopygidae |  | ||
| Megagnostus | M. sp | Agnostida | Less common than Peronopsis, makes up fewer of the enrolled specimens in Murero[17] | ||
| Bailiaspis | B. tuberculata | Conocoryphidae | Unclear whether any Mesones specimens belong to the species[19] |  | |
| Bailiella | B. tenucincta | Conocoryphidae | A blind trilobite[20] | ||
| Conocoryphe | C. heberti | Conocoryphidae | An eyeless trilobite.[21] |  | |
| Cornucoryphe | C. schirmi | Conocoryphidae | An unusual trilobite with a horn in the middle of its head[22] | ||
| Eccaparadoxides | E. pradoanus E. mediterraneus | Paradoxididae | Very abundant in Murero, had unique specialisations for enrolment[23] and shows unusual variability[24] |  | |
| Pardailhania | P. hispida, P. multispinosa, P. sdzuyi | Solenopleuridae | Used for stratigraphy in Murero[25] | ||
| Solenopleuropsis | S. marginata, S. thorali | Solenopleuridae | Exhibits circular enrolment alongside Pardailhania[26] | ||
| Dinesus | D. truyolsi[27] | Dinesidae | |||
| Alueva | A. undulata | Ellipsocephalidae | Exhibits paedomorphosis[28] | ||
| Wronascolex? | ?W. sp | Palaeoscolecida | Formerly placed within Palaeoscolex[29] | .jpg) | |
| Marocella | M. morenensis | Helcionelloidea | Found in other localities across the world[30] | ||
| Trematobolus | T. simplex | Obolidae | Synonymous with the purported "bivalve" Lamellodonta[31] | ||
| Brahimorthis | B. alvaroi | Brahimorthidae (Orthida) | Relatively underived member of the genus[32] | ||
| Nisusia | N. sp[32] | Kutorginata | |||
| Serpulidae indet. | Unapplicable | Sabellida | Encrusted on shells[33] | ||
| Leptomitus | L. lineatus, L. conicus[34] | Protomonaxonida | L. lineatus specimens may not belong to the species[35] |  | |
| Crumillospongia | C. mureroensis | Protomonaxonida | Bears larger pores than other members of the genus[36] |  | |
| Eiffelia? | ?E. sp | Protomonaxonida | Only known from six-rayed spicules[37] |  | |
| Chancelloria | C. sp | Chancelloriidae | Also only known from spicules[37] |  | |
| Psammosphaera | P. sp | Astrorhizida (Foraminifera) | Mainly encrusted on shells[33] | ||