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List of non-marine molluscs of Venezuela

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The non-marine molluscs of Venezuela are a part of the molluscan fauna of Venezuela (which is part of the wildlife of Venezuela). Non-marine molluscs are the snails, clams, and mussels that live in freshwater habitats, and the snails and slugs that live on land. Sea-dwelling molluscs are not included in this list.

Shells of non marine molluscs from Venezuela. Bivalves: Anodontites trapesalis; Paxyodon syrmatophorus; Mycetopoda pittieri. Gastropods: Pomacea doliodes; Megalobulimus oblongus.
Location of Venezuela

A number of species of non-marine molluscs are found in the wild in Venezuela.

Historical background

Studies on the knowledge of the Venezuelan malacofauna begin in the nineteenth century with the work of German malacologist Eduard von Martens around 1873 who published the first list of the mollusks Venezuela.[1] Three years later, the German-Venezuelan Adolfo Ernst, taking as its starting point and extending Martens' list, published a second list in 1876.[2] Subsequent to these two pioneering nineteenth century works, only sporadic descriptions were published in foreign publications. It took about half a century for new listings of malacofauna of Venezuela to be published, this time by American H. B. Baker in the mid-1920s.[3][4][5][6][7][8]

Following Baker's work is beginning to make as many Venezuelan species descriptions and numerous national and regional listings, including: Adolfo Lutz, who in 1928 listed and made observations on malacofauna of Valencia Lake and surrounding areas;[9] H. Richards, G. Hummelinck, & P. W. Malacofauna 1940 describing the island of Margarita;[10] Arias in 1952 and 1953, in which he describes the fauna of the regions of Baruta, El Hatillo and Perija region;[11][12] Thompson, who in 1957 described the shellfish of National Park Henri Pittier and surrounding areas;[13] Martinez and Miranda in 1968 who described pulmonate molluscs of Caracas and surrounding areas;[14] Fernández in 1982, who describes sitecueros of slugs and Venezuela;[15] Martinez et al. in 2004 who described freshwater bivalve fauna of Venezuela ;[16] and Lasso and collaborators in 2009, who described the fauna of the basin of the Orinoco.[17]

Diversity

Pomacea urceus family Ampullariidae member, one of the most diverse

The non-marine molluscs of Venezuela are composed of classes Gastropoda and Bivalvia.

The freshwater gastropod families with the greatest number of species are Ampullariidae (35 spp.) and Planorbidae (15 spp.).[8][14][17] Terrestrial gastropod families include Ortalicidae (35 spp.) and Subulinidae (16 spp.).[6][7][11][12][13]

Among the bivalve families with the most species are Mycetopodidade (17 spp.) and Hyriidae (10 spp.)[16][17]

Regarding introduced species, the largest number of species is between terrestrial mollusks, primarily on families Subulinidae (6 spp.), Limacidae (4 spp.), and Helicidae (3 spp.)[14][15][18][19]

Distribution

Pomacea dolioides

The Venezuelan non-marine malacofauna are distributed throughout the entire Venezuelan territory, but the greatest number of species and greatest distribution has been reported for the river basin Orinoco.[16][17] The vast majority of species live in calm water, pipes, or flooded rivers and lakes. Many of the species have local distributions such as slugs and seven of leathers that often live primarily in the areas of cultivation in the north and the Andean region,[14][15] However, very widely distributed species that can be located throughout the country as in the case of molluscs Ampullariidae amphibians and within the family which include Marisa cornuarietis,[8][20] Pomacea urceus (Guarura),[8][21][22][20] Pomacea glauca,[8][20] Pomacea dolioides.[8][20][23] Among the highlights is Megalobulimus oblongus (Guacara).[7][11][12][13][20]

In relation to introduced species is noteworthy that some of it was spread widely by middle natural environment among them are: Achatina fulica (Giant African Snail),[24][25] Arion subfuscus[15] Subulina octona,[7][10][26] and Thiara granifera[17][18][20] Melanoides tuberculata.[17][18][20]

List of non-marine molluscs of Venezuela

The list of non-marine molluscs of Venezuela consists of:

  • Freshwater gastropods: 9 families, 19 genera, 82 species.
  • Terrestrial gastropods: 26 families, 58 genera, 116 species.
  • Freshwater bivalves: 5 families, 11 genera, 31 species.

In total, 30 families, 88 genera, and 229 species are listed.

Freshwater gastropods

Two shells of Marisa cornuarietis
A shell of Pomacea glauca
A shell of Pomacea interrupta
A shell of Pomacea glauca orinocensis

Freshwater gastropods include:

Family Ampullariidae

Family Ancylidae

Family Hydrobiidae

Over 30 individuals of Pyrgophorus coronatus

Family Lymnaeidae

Two shells of Neritina puncticulata

Family Neritidae

Two shells of Pachychilus laevissimus

Family Pachychilidae

Two shells of Aplexa rivalis

Family Physidae

Two views of a shell of Planorbella duryi

Family Planorbidae

Two shells of Melanoides tuberculata

Family Thiaridae

A shell of Achatina fulica

Land gastropods

Land gastropods include:

Family Achatinidae

Family Arionidae

An active individual of Arion subfuscus

Family Bradybaenidae

A shell of Bradybaena similaris

Family Clausiliidae

  • Bequaertinenia bequaerti (Arias, 1953)[12]
  • Columbina cyclostoma (Pfeiffer, 1849)[7][56]
  • Gonionenia dohrni (Pfeiffer, 1860)[7][56]
  • Nenia geayi (Jousseaume, 1849)[7][56]

Family Euconulidae

Family Ferussaciidae

  • Cecilioides acicula (Müller 1774) - blind awlsnail (introduced species)[18]
  • Cecilioides aperta (Swainson, 1840) (introduced species)[18]
  • Cecilioides consobrina (d’Orbigny, 1842)[10]

Family Helicidae

Two shells of Helix pomatia

Family Helicinidae

  • Helicina microdina (Morelet, 1854)
    • Helicina microdina huberi Breure, 1976[57]
A shell of Megalobulimus oblongus
  • Helicina tamsiana (Pfeiffer, 1850)
    • Helicina tamsiana appuni (Von Marten, 1873)[13]

Family Limacidae

Family Strophocheilidae

Family Neocyclotidae

Three views of a shell of Poteria translucida

Family Amphibulimidae

A shell of Dryptus marmoratus

Family Orthalicidae

A shell of Oxistila maracaibensis
  • Auris sinuata (Albers, 1854)[13]
  • Oxystyla abducta (Shuttleworth, 1856)[6]
  • Oxystyla maracaibensis (Pfeiffer, 1899)[10]

Family Bulimulidae

  • Bulimulus dysoni Pfeiffer[10]
  • Bulimulus cacticolus Reeve[10]
  • Bulimulus constrictus Pfeiffer[10]
  • Bulimulus krebsianus Pilsbry, 1897[6]
  • Drymaeus extraneus (Haas, 1955) - synonym: Drymaeus griffini Haas, 1955[59]
  • Drymaeus grandensis (Pfeiffer, 1847)[6]
  • Drymaeus imperfectus (Guppy, 1866)[12]
  • Drymaeus meridanus (Pfeiffer)[10]
  • Drymaeus multilineatus (Say, 1825)[10] - lined treesnail
  • Drymaeus rex Breure, 2009[59]
  • Drymaeus ruthveni Baker, 1926[6]
  • Drymaeus trigonostomus (Jonas, 1844)[6]
    • Drymaeus trigonostomus knorri (Pfeiffer, 1846)[6]
  • Drymaeus virgulatus (Férussac)[10]

Family Simpulopsidae

  • Simpulopsis magnus gg[13]

Family Odontostomidae

Family Pleurodontidae

Two shells of Labyrinthus leucodon
Two shells of Labyrinthus plicatus
Two shells of Labyrinthus umbrus

Family Pupillidae

Family Sagdidae

Family Scolodontidae

  • Systrophia starkii (H. B. Baker)[10][13]

Family Systrophiidae

  • Drepanostomella pinchoti Pilsbry, 1930[13]

Family Spiraxidae

  • Pseudosubulina decussata Baker, 1926[6]
  • Pseudosubulina chaperi (Jousseaume 1889)[6]
  • Spiraxis blandi (Crosse, 1874)[26]

Family Streptaxidae

Family Subulinidae

An empty shell and a whole but retracted individual of Subulina octona

Family Succineidae

  • Omalonyx felina Guppy 1878[6]
  • Omalonyx pattersonae Tillier, 1891[62]
  • Succinea tamsiana Pfeiffer[10][14]

Family Thysanophoridae

  • Thysanophora canalis (Pilsbry, 1910)[6]
  • Thysanophora plagiptycha (Shuttleworth, 1854)[6][10]
  • Thysanophora satanaensis (Pfeiffer, 1854)[6]

Family Urocoptidae

  • Brachypodella hanleyana (Pfeiffer, 1847)[7][10]
  • Brachypodella leucopleura (Menke, 1847)[7][10]
  • Brachypodella nidicostata Spence, 1920[7]
A preserved specimen of Diplosolenodes occidentalis

Family Veronicellidae

A live individual of Sarasinula plebeia

Family Vertiginidae

Family Xanthonychidae

  • Averellia coactiliata (Férrussac, 1838)[6]

Freshwater bivalves

A whole shell of Castalia schombergiana
A whole shell of Diplodon granosus
Two whole shells of Paxydon syrmatophorus
A whole shell of Tamsiella tamsiana

Family Corbiculidae

Family Corbulidae

  • Cyanocyclas cuneata Say, 1822[17]

Family Hyriidae

Family Mycetopodidae

  • Anodontites crispatus Bruguiere, 1792[17]
  • Anodontites elongatus (Swainson, 1823)[17]
  • Anodontites ensiformes (Spix, 1827)[16][17]
  • Anodontites guanarensis Marshall, 1928[16][17]
  • Anodontites infossa Baker, 1930[17]
  • Anodontites pittieri Marshall, 1922[16][17]
  • Anodontites schombergianus Sowerby, 1870[16][17]
  • Anodontites leotaudi (Guppy, 1866)[17]
  • Anodontites tenebricosus D’Orbigny, 1835[17]
  • Anodontites tortilis (Lea, 1852)[17]
  • Anodontites trapezeus (Spix, 1827)[17]
  • Anodontites trapesialis Lamarck, 1819[16][17][77]
  • Anodontites trigona (Spix, 1827)[16][17]
  • Mycetopoda pittieri Marshall, 1919[16][17][78]
  • Mycetopoda soleniformes D’Orbigny, 1835[17]
  • Tamsiella tamsiana Dunker, 1895[16][17][79]

Family Pisidiidae

  • Eupera bahiensis (Spix, 1827)[17]
  • Eupera modioliforme Anton, 1837[17]
  • Eupera simoni Jousseaume, 1889[17]

See also

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