The non-marine molluscs of the republic of Trinidad and Tobago (which comprises two West Indian islands) are a part of the molluscan fauna of Trinidad and Tobago, part of the Natural history of Trinidad and Tobago.
Starting in the 1860s, the terrestrial and freshwater molluscs of Trinidad and Tobago have been fairly well studied. Thomas Bland published the first paper mentioning terrestrial molluscs in 1861. Robert John Lechmere Guppy discovered and identified many more species from 1864 onwards, and along with Edgar Albert Smith was responsible for the earliest comprehensive species lists. The list here includes all the non-marine mollusks found in Trinidad and Tobago`s ecosystem including native, introduced and invasive species alike.
Freshwater gastropods include:
Ampullariidae
Marisa cornuarietis (Linnaeus, 1758)
Pomacea glauca (Linné, 1758)
Pomacea urceus (Müller, 1774)
Ancylidae
Hebetancylus excentricus (Morelet, 1851)
Hydrobiidae
Pyrgophorus parvulus (Guilding, 1828)
Physidae
Physella cubensis (Pfeiffer, 1839)
Planorbidae
Tropicorbis pallidus (C.B. Adams, 1846)
Thiaridae
Melanoides tuberculata (O. F. Müller, 1774)
Land gastropods
Land gastropods include:
Helicinidae
Helicina nemoralis Guppy, 1866
Helicina dysoni (L. Pfeiffer, 1849)
Lucidella ignicoma (Guppy, 1868)
Lucidella lirata (L. Pfeiffer, 1847)
Neocyclotidae
Cyclohidalgoa translucidum - Cyclohidalgoa translucidum trinitense (Guppy, 1864)
Austrocyclotus rugatus (Guppy, 1864)
Diplommatinidae
Adelopoma occidentale (Guppy, 1872)
Pomatiidae
Choanopoma aripensis (Guppy, 1864)
Truncatellidae
Blandiella reclusa Guppy, 1871
Veronicellidae
Diplosolenodea bielenbergi (Semper, 1885)
Sarasinula plebeia (Fischer, 1868)
Subulinidae
Allopeas gracile (Hutton, 1834)
Allopeas micra (d’Orbigny, 1835)
Beckianum beckianum (L. Pfeiffer, 1846)
Leptinaria simplex (Guppy, 1868)
Leptinaria unilamellata (d’Orbigny, 1837)
Leptinaria urichi (E.A. Smith, 1896)
Obeliscus plicatellum (Guppy, 1868)
Subulina octona (Bruguière, 1798)
Ferussaciidae
Karolus consobrinus (d’Orbigny, 1842)
Streptaxidae
Huttonella bicolor (Hutton, 1834)
Streptaxis glaber (L. Pfeiffer, 1849)
Streptostele musaecola (Morelet, 1860)
Succineidae
Succinea candeana Lea
Succinea pusilla Pfeiffer
Omalonyx matheroni (Potiez & Michaud, 1838)
Vertiginidae
Bothriopupa tenuidens (C.B. Adams, 1845)
Gastrocopta barbadensis (L. Pfeiffer, 1853)
Gastrocopta servilis riisei (L. Pfeiffer, 1852)
Gastrocopta rupicola marginalba (L. Pfeiffer, 1840)
Gastrocopta geminidens (Pilsbry, 1930)
Orthalicidae
Orthalicus undatus (Bruguière, 1789)
Bulimulus diaphanus (Pfeiffer, 1855)
Drymaeus broadwayi (E.A. Smith, 1896)
Drymaeus imperfectus (Guppy, 1866)
Drymaeus mossi (E.A. Smith, 1896)
Drymaeus rawsoni (Guppy, 1871)
Drymaeus vincentinus (L. Pfeiffer, 1846)
Naesiotus pilosus (Guppy, 1871)
Plekocheilus glaber (Gmelin, 1791)
Simpulopsis corrugatus Guppy, 1866
Urocoptidae
Brachypodella trinitaria (L. Pfeiffer, 1860)
Brachypodella oropuchensis Spence
Scolodontidae
Happiella guildingi (Bland, 1865)
Miradiscops lunti (E.A. Smith, 1898)
Systrophia alicea (Guppy, 1871)
Tamayoa trinitaria (E.A. Smith, 1898)
Gastrodontidae
Striatura umbratilis (Guppy, 1868)
Philomycidae
Pallifera sp.
Euconulidae
Guppya gundlachi (L. Pfeiffer, 1840)
Habroconus ernsti (Jousseaume)
Habroconus cassiquiensis (L. Pfeiffer, 1853)
Helicarionidae
Ovachlamys fulgens (Gude, 1900)
Strophocheilidae
Megalobulimus oblongus (Müller, 1774)
Megalobulimus oblongus var. tobagoensis (Pilsbry, 1895)
Helicodiscidae
Radiodiscus bactricolus (Guppy, 1868)
Xanthonychidae
Averellia coactiliata (Deshayes, 1839)
Thysanophoridae
Thysanophora plagioptycha (Shuttleworth, 1854)
Freshwater bivalves include:
Mycetopodidae
Anodontites leotaudi (Guppy, 1864)
Mycetopoda siliquosa (Spix, 1827)
Sphaeriidae (=Pisidiidae)
Pisidium punctiferum (Guppy, 1867)
Eupera cubensis (Prime, 1865)
