List of data deficient molluscs facts for kids

In September 2016, the International Union for Conservation of Nature (IUCN) looked at many mollusc species. Molluscs are soft-bodied animals like snails, slugs, clams, and octopuses. The IUCN found that 1988 mollusc species and 40 mollusc subspecies were "data deficient." This means there isn't enough information about them to know if they are safe or in danger. About 27% of all molluscs studied were put into this "data deficient" group.

No smaller groups of molluscs have been checked by the IUCN. This article lists some of the mollusc species and subspecies that we don't have enough information about.

What Does "Data Deficient" Mean?

When a species is called "data deficient" by the International Union for Conservation of Nature (IUCN), it means scientists don't have enough information to figure out if it's doing well or if it's in danger of disappearing. It's like trying to solve a puzzle with missing pieces. We know the animal exists, but we don't know how many there are, where exactly they live, or what threats they might face. This doesn't mean they are definitely in danger, but it does mean we need to learn more about them to protect them properly.

Gastropods: Snails and Slugs

Gastropods are a huge group of molluscs that include all snails and slugs. They can live on land, in fresh water, or in the ocean. In 2016, 1526 species and 37 subspecies of gastropods were listed as data deficient. This means we need to study many of these snails and slugs more closely.

Land Snails and Slugs (Stylommatophora)

This group includes most of the snails and slugs you might see in your garden or in forests. There are 392 species and 32 subspecies in this group that are data deficient.

Partulids

Partulids are a type of land snail. Some examples of data deficient Partulids include Partula carteriensis and Samoana ganymedes.

Subulinids

Subulinids are also land snails. Data deficient species include Hypolysia connollyana and Pseudoglessula acutissima. Some subspecies like Opeas nothapalinus crenatum also need more study.

Achatinellids

These are another family of land snails. Many species like Auriculella ambusta and Partulina dolei are data deficient.

Endodontids

This group includes snails like the Painted snake-coiled forest snail (Anguispira picta). Many Hirasea species are also data deficient.

Charopids

Charopids are small land snails. Examples of data deficient species are Bischoffena bischoffensis and Sinployea kusaieana.

Helicarionids

These are land snails and slugs. Atrichotoxon usambarense and Ryssota pachystoma are some of the species that need more data.

Orthalicids

This family includes snails like Bulimulus albermalensis and Placostylus garretti.

Euconulids

Euconulids are often small, cone-shaped snails. Dendrotrochus ponapensis and many Lamprocystis species are data deficient.

Rhytidids

This group includes carnivorous land snails. The Gillies' land snail (Paryphanta gilliesi) and Hochstetter's land snail (Paryphanta hochstetteri) are examples that need more research.

Streptaxids

Streptaxids are predatory land snails. Many species like Gulella alleni and Edentulina usambarensis are data deficient. Several subspecies also need more information.

Zonitids

These are often shiny, flattened snails. Brazieria entomostoma and Trochomorpha approximata are some of the data deficient species.

Pupillids

Pupillids are very small land snails. Many species in the Lyropupa and Nesopupa groups, such as Lyropupa anceyana and Nesopupa alloia, are data deficient.

Polygyrids

This family includes various land snails, often with teeth-like structures inside their shell opening. The Archer's toothed land snail (Mesodon archeri) and Virginia fringed mountain snail (Polygyriscus virginianus) are examples.

Helminthoglyptids

These are land snails found in North America. The Shasta sideband (Monadenia troglodytes) is a data deficient species. Several subspecies, like the Cathedral desert snail, also need more study.

Camaenids

Camaenids are a diverse group of land snails. Amplirhagada herbertena and the Mua treesnail (Noctepuna muensis) are among those with insufficient data.

Lauriids

These are small land snails. Leiostyla castanea and Leiostyla fuscidula are examples of data deficient species.

Vertiginids

Vertiginids are tiny land snails. Truncatellina atomus and Vertigo paradoxa are listed as data deficient.

Bradybaenids

This family includes land snails like Aegista inexpectata and Helicostyla zebuensis.

Helicids

Helicids are a family of land snails, including common garden snails. Chilostoma cingulatum and many Hemicycla species are data deficient.

Hygromiids

Hygromiids are also land snails. Actinella robusta and Helicella bolenensis are examples of species needing more data.

Enids

Enids are land snails. Chondrula bergeri and many Napaeus species, like Napaeus anaga, are data deficient.

Other Stylommatophora Land Snails

Many other land snail and slug species, such as the Santa Barbara shelled slug (Binneya notabilis) and the Chittenango ovate amber snail (Succinea chittenangoensis), are also data deficient.

Marine and Freshwater Snails (Littorinimorpha)

This large group includes many snails that live in the ocean or in fresh water. There are 565 species and one subspecies in this group that are data deficient.

Strombids

Strombids are a family of sea snails. Ophioglossolambis violacea is a data deficient species.

Pomatiids

These are land snails, but they are related to marine snails. Chondropoma callipeplum and Tropidophora carinata are data deficient.

Hydrobiids

Hydrobiids are small freshwater snails. This is a very large group with many data deficient species, including the Rhön spring snail (Bythinella compressa) and the Tapered cavesnail (Fontigens holsingeri).

Cochliopids

Cochliopids are freshwater snails. Aroapyrgus colombiensis and many Heleobia species are data deficient. The Alamosa springsnail (Tryonia alamosae) is another example.

Bithyniids

Bithyniids are freshwater snails. Many Bithynia species, like Bithynia boissieri, and Gabbia species, like Gabbia carinata, are data deficient.

Moitessieriids

These are small freshwater snails, often found in caves. Clameia brooki and many Moitessieria species are data deficient.

Assimineids

Assimineids are small snails found in brackish or freshwater environments. Many species like Assiminea bella and Omphalotropis albocarinata are data deficient.

Pomatiopsids

These are freshwater snails. Cecina alta and the Pacific walker (Pomatiopsis californica) are among the data deficient species.

Lithoglyphids

Lithoglyphids are freshwater snails. The Moapa pebblesnail (Fluminicola avernalis) and Columbia pebblesnail (Fluminicola columbiana) are examples.

Amnicolids

Amnicolids are freshwater snails. Many Baicalia species, like Baicalia angarensis, are data deficient.

Stenothyrids

Stenothyrids are small freshwater snails. Stenothyra acuta and Stenothyra annandalei are data deficient.

Iravadiids

Iravadiids are small marine snails. Iravadia annadalei and Iravadia funerea are examples.

Truncatellids

Truncatellids are small snails found in coastal areas. Taheitia alata and Taheitia lamellicosta are data deficient.

Other Marine and Freshwater Snails (Sorbeoconcha)

This group includes various marine and freshwater snails. There are 97 species and one subspecies evaluated as data deficient.

Batillarids

Batillarids are marine snails. Batillaria mutata is a data deficient species.

Pleurocerids

Pleurocerids are freshwater snails. The Knobby rocksnail (Lithasia curta) and Noble hornsnail (Pleurocera nobilis) are examples.

Melanopsids

Melanopsids are freshwater snails. Melanopsis arbalensis and Melanopsis cariosa are data deficient.

Semisulcospirids

These are freshwater snails. The Oasis juga (Juga laurae) is a data deficient species.

Thiarids

Thiarids are freshwater snails. Many Melania and Melanoides species, like Melania canalis and Melanoides angolensis, are data deficient.

Pachychilids

Pachychilids are freshwater snails. Brotia cylindrus and Pachychilus oerstedi are among the data deficient species.

Paludomids

Paludomids are freshwater snails. The Bella snail (Paludomus sulcatus) and many Cleopatra species are data deficient.

Ancient Snails (Architaenioglossa)

This group includes some very old types of snails. There are 106 species and one subspecies that are data deficient.

Neocyclotids

Neocyclotids are land snails. Kondoraphe kiyokoae and Ostodes brazieri are data deficient.

Cyclophorids

Cyclophorids are land snails. Awalycaeus akiratadai and Japonia hispida are examples.

Pupinids

Pupinids are land snails. Cytora hirsutissima and Pupina brenchleyi are data deficient.

Diplommatinids

These are small land snails. Cochlostoma intermedium and many Diplommatina species are data deficient.

Aciculids

Aciculids are very small land snails. Acicula douctouyrensis and Menkia dewinteri are examples.

Viviparids

Viviparids are freshwater snails that give birth to live young. Angulyagra boettgeri and the Ochlockonee mysterysnail (Viviparus limi) are data deficient.

Ampullariids

Ampullariids are freshwater snails, also known as apple snails. Felipponea iheringi and many Pomacea species are data deficient.

Lower Heterobranchia Snails

This group includes various snails, some of which are freshwater. The Great Lake snail (Benthodorbis pawpela) and the Threeridge valvata (Valvata tricarinata) are data deficient.

Cycloneritimorpha Snails

This group includes marine and freshwater snails. There are 30 species and two subspecies that are data deficient.

Helicinids

Helicinids are land snails. Many Ogasawarana species, like Ogasawarana arata, are data deficient.

Hydrocenids

Hydrocenids are very small land snails. Georissa biangulata and Georissa elegans are data deficient.

Neritids

Neritids are marine and freshwater snails. The Anchialine pool snail (Neritilia hawaiiensis) and the Weakly cut nerite (Neritodryas subsulcata) are examples.

Hygrophila Snails

This group includes freshwater snails and limpets. There are 197 Hygrophila species evaluated as data deficient.

Physids

Physids are freshwater snails. The Sonoma physa (Archiphysa sonomae) and Snake River physa snail (Physella natricina) are data deficient.

Acroloxids

Acroloxids are freshwater limpets. Acroloxus arachleicus and Pseudancylastrum olgae are examples.

Planorbids

Planorbids are freshwater snails, often shaped like a ram's horn. The Lesser ramshorn snail (Anisus vorticulus) and the Marsh sprite (Micromenetus alabamensis) are data deficient.

Lymnaeids

Lymnaeids are freshwater snails. The Hawaiian bugle (Erinna aulacospira) and the Glutinous snail (Myxas glutinosa) are data deficient.

Chilinids

Chilinids are freshwater snails found in South America. Chilina ampullacea and Chilina elegans are data deficient.

Latiids

Latiids are freshwater limpets. Latia lateralis is a data deficient species.

Neogastropoda Snails

This group includes many predatory marine snails. There are 113 species evaluated as data deficient.

Turrids

Turrids are marine snails. Agathothoma finalis and Crassispira sacerdotalis are data deficient.

Marginellids

Marginellids are small marine snails. Cysticus gutta and Gibberula cucullata are examples.

Buccinids

Buccinids are marine snails, often called whelks. Clea broti and Paradoxa confirmata are data deficient.

Muricids

Muricids are marine snails, often called murex snails. Muricopsis mariangelae and Neorapana grandis are data deficient.

Conids

Conids are marine cone snails, known for their cone-shaped shells. Many species, like the Spindle cone (Conus aculeiformis) and Glory of India cone (Conus eduardi), are data deficient.

Eupulmonata Snails

This group includes various land and freshwater snails. Auriculodes gangetica and Ellobium chinense are data deficient.

Archaeopulmonata Snails

This group includes some ancient types of snails. Salinator sanchezi and Salinator swatowensis are data deficient.

Bivalves: Clams and Mussels

Bivalves are molluscs with two shells hinged together, like clams, oysters, and mussels. There are 171 species and three subspecies of bivalves that are data deficient.

Pectinida Bivalves

This group includes scallops. Nodipecten magnificus is a data deficient species.

Unionida Bivalves (Freshwater Mussels)

This group includes freshwater mussels. There are 95 species in this order that are data deficient.

Margaritiferids

These are freshwater pearl mussels. Margaritifera dahurica and Margaritifera laevis are data deficient.

Unionids

Unionids are a large family of freshwater mussels. The Elktoe (Alasmidonta marginata) and Cockscomb pearl mussel (Cristaria plicata) are examples that need more data.

Hyriids

Hyriids are freshwater mussels found in the Southern Hemisphere. Alathyria jacksoni and Echyridella lucasi are data deficient.

Iridinids

Iridinids are freshwater mussels found in Africa. Aspatharia droueti and Mutela bourguignati are examples.

Mycetopodids

Mycetopodids are freshwater mussels from South America. Anodontites elongatus and Anodontites trigonus are data deficient.

Venerida Bivalves

This group includes many types of clams. There are 74 species and three subspecies that are data deficient.

Dreissenids

Dreissenids are freshwater and brackish water mussels. Dreissena iconica is a data deficient species.

Sphaeriids

Sphaeriids are small freshwater clams, also called pea clams or orb shells. The Oval orb shell (Musculium problematicum) and many Pisidium species are data deficient.

Cyrenids

Cyrenids are freshwater and brackish water clams. Many Corbicula species, like Corbicula amurensis, are data deficient.

Donacids

Donacids are marine clams. Egeria kockii and Egeria schwabi are data deficient.

Solecurtids

Solecurtids are marine clams. Novaculina siamensis is a data deficient species.

Mytilida Bivalves

This group includes marine mussels. Sinomytilus morrisoni is a data deficient species.

Cephalopods: Octopuses and Squids

Cephalopods are intelligent molluscs like octopuses, squids, and cuttlefish. There are 291 cephalopod species evaluated as data deficient.

Idiosepiida (Pygmy Squids)

This group includes very small squids. The Southern pygmy squid (Idiosepius notoides) and Northern pygmy squid (Idiosepius paradoxus) are data deficient.

Octopuses

There are 34 octopus species evaluated as data deficient.

Umbrella Octopuses (Opisthoteuthidae)

These are deep-sea octopuses with webbed arms that look like an umbrella. Many Opisthoteuthis species, such as Opisthoteuthis agassizii and Opisthoteuthis californiana, are data deficient.

Argonautids

This group includes paper nautiluses. Argonauta cornuta is a data deficient species.

Cirroteuthids

These are deep-sea octopuses with fins. Cirrothauma magna and Stauroteuthis gilchristi are data deficient.

Grimpoteuthis Species

These are also deep-sea octopuses, often called "Dumbo octopuses" because of their ear-like fins. Many Grimpoteuthis species, like Grimpoteuthis abyssicola and Grimpoteuthis hippocrepium, are data deficient.

Sepioloida (Cuttlefish and Bobtail Squids)

There are 142 species in this group that are data deficient.

Sepiids (Cuttlefish)

Cuttlefish are known for their ability to change color and texture. The Flamboyant cuttlefish (Metasepia pfefferi) and Needle cuttlefish (Sepia aculeata) are among the many data deficient species.

Sepiolids (Bobtail Squids)

Bobtail squids are small, round-bodied squids. The Big-eyed bobtail squid (Austrorossia bipapillata) and Humming-bird bobtail squid (Euprymna berryi) are data deficient.

Sepiadariids

These are small cuttlefish-like animals. The Striped pyjama squid (Sepioloidea lineolata) and Southern bottletail squid (Sepiadarium austrinum) are data deficient.

Oegopsina Squids

This is a large group of open-ocean squids. There are 104 Oegopsina species evaluated as data deficient.

Mastigoteuthidae

These are deep-sea squids. Mastigoteuthis agassizii and Mastigoteuthis atlantica are data deficient.

Enoploteuthids

These are small to medium-sized squids, often with light organs. Abralia armata and Abraliopsis atlantica are data deficient.

Hooked Squids (Onychoteuthidae)

These squids have hooks on their arms. Callimachus rancureli and Onychoteuthis banksii are data deficient.

Chiroteuthids

These are deep-sea squids with very long arms. Asperoteuthis lui and Planctoteuthis exopthalmica are data deficient.

Cranchiids

Cranchiids are often called "glass squids" because their bodies are transparent. The Banded piglet squid (Helicocranchia pfefferi) and Sandal-eye squid (Sandalops melancholicus) are data deficient.

Octopoteuthids

These are deep-sea squids. Octopoteuthis danae and Octopoteuthis deletron are data deficient.

Other Oegopsina Squids

Other squids in this group, like the Humboldt squid (Dosidicus gigas) and Gonatus oregonensis, are also data deficient.

Bathyteuthida Squids

These are deep-sea squids. Bathyteuthis bacidifera and the Comb-finned squid (Chtenopteryx sicula) are data deficient.

See also

• Lists of IUCN Red List data deficient species
• List of least concern molluscs
• List of near threatened molluscs
• List of vulnerable molluscs
• List of endangered molluscs
• List of critically endangered molluscs
• List of recently extinct molluscs