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List of least concern molluscs facts for kids

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Molluscs are a big group of animals that includes snails, slugs, clams, and octopuses. In September 2016, the International Union for Conservation of Nature (IUCN) looked at many mollusc species and found that 2,437 of them were considered "least concern." This means these species are not currently at risk of disappearing. About 34% of all molluscs studied by the IUCN fall into this category. The IUCN also listed five mollusc subspecies as least concern.

This article shares some of the mollusc species and subspecies that are doing well, according to the IUCN.

Contents

Gastropods: Snails and Slugs

There are 1,944 species and three subspecies of gastropods that are considered least concern. Gastropods are a large group that includes snails and slugs, both on land and in water.

Land Snails and Slugs (Stylommatophora)

This group includes most land snails and slugs. A total of 599 species and one subspecies in this group are listed as least concern. Here are a few examples from different families:

Charopids

  • Discocharopa aperta
  • Discocharopa mimosa

Streptaxids

  • Plant's gulella snail (Gulella plantii)
  • Seychellaxis souleyetianus

Lauriids

  • Lauria fanalensis
  • Leiostyla anglica

Vertiginids

Cochlicellids

  • Monilearia caementitia
  • Obelus mirandae

Trissexodontids

Helicids: Common Snails

This family includes many well-known snails. Species

Subspecies

  • Hemicycla glyceia glyceia

Hygromiids

This is a very large family of land snails.

  • Wrinkled snail (Candidula intersecta)
  • Heath snail (Helicella itala)
  • Scaly snail of Doboz (Kovacsia kovacsi)
  • Green snail (Ponentina subvirescens)
  • Hairy snail (Trochulus hispidus)
  • Strawberry snail (Trochulus striolatus)
  • Brown snail (Zenobiella subrufescens)

Vitrinids

  • Eucobresia diaphana
  • Plutonia atlantica

Chondrinids

  • Abida secale
  • Chondrina ascendens

Enids

Argnids

  • Agardhiella armata
  • Argna bielzi

Helicodontids

Orculids

Other Land Snail Species

Littorinimorpha: Sea and Freshwater Snails

There are 311 species and one subspecies in this group that are least concern. Many of these live in water.

Hydrobiids

This family includes many small freshwater snails.

  • Suwannee hydrobe (Aphaostracon hypohyalinum)
  • Karst snail of Torna (Bythinella pannonica)
  • Rocky Mountain duskysnail (Colligyrus greggi)
  • Bantum hydrobe (Littoridinops palustris)
  • Halcyon marstonia (Marstonia halcyon)
  • New Zealand mud snail (Potamopyrgus antipodarum)
  • Oasis Valley springsnail (Pyrgulopsis micrococcus)
  • Panhandle pebblesnail (Somatogyrus virginicus)

Cochliopids

Bithyniids

Species

Subspecies

  • Gabbiella humerosa humerosa

Moitessieriids

  • Moitessieria locardi
  • Paladilhia conica

Assimineids

  • Red mangrove shell (Assiminea brevicula)
  • Dun sentinel (Assiminea grayana)

Pomatiopsids

Amnicolids

  • Cobble sprite (Lyogyrus latus)
  • Indented duskysnail (Lyogyrus retromargo)

Stenothyrids

  • Stenothyra basisculpta
  • Stenothyra minima

Iravadiids

  • Iravadia cochinchinensis
  • Iravadia ornata

Other Littorinimorpha Species

Sorbeoconcha: Diverse Snails

There are 132 species and one subspecies in this group that are least concern.

Pleurocerids

These are freshwater snails.

  • Black-crest elimia (Elimia albanyensis)
  • Club elimia (Elimia clavaeformis)
  • Varicose rocksnail (Lithasia verrucosa)

Melanopsids

  • Melanopsis buccinoidea
  • Melanopsis praemorsa

Semisulcospirids

  • Black juga (Juga nigrina)

Thiarids

Pachychilids

Paludomids

Species

  • Cleopatra africana
  • Paludomus conica

Subspecies

  • Cleopatra bulimoides bulimoides

Potamidids

Architaenioglossa: Operculate Snails

There are 158 species in this group that are least concern. These snails have a special "lid" called an operculum.

Cyclophorids

  • Cyathopoma blandfordi

Pupinids

  • Pupina difficilis

Diplommatinids

  • Cochlostoma elegans
  • Plectostoma whitteni

Aciculids

Viviparids: Live-bearing Snails

These freshwater snails give birth to live young.

  • Ovate campeloma (Campeloma geniculum)
  • Chinese mystery snail (Cipangopaludina chinensis)
  • Ridged lioplax (Lioplax subcarinata)
  • River snail (Notopala essingtonensis)
  • Italian river snail (Viviparus ater)
  • Lister's river snail (Viviparus contectus)
  • Rotund mysterysnail (Viviparus intertextus)

Ampullariids: Apple Snails

Craspedopomatids

  • Craspedopoma costata
  • Craspedopoma mucronatum

Lower Heterobranchia Species

  • Glossy valvata (Valvata humeralis)
  • Large mouthed valve snail (Valvata macrostoma)
  • European stream valvata (Valvata piscinalis)

Cycloneritimorpha: Nerites and Relatives

There are 40 species in this group that are least concern.

Helicinids

  • Palaeohelicina heterochroa
  • Pleuropoma pelewensis

Neritids

This family includes many colorful snails found in marine and freshwater environments.

Neritiliids

  • Platynerita rufa

Hygrophila: Freshwater Snails

There are 188 Hygrophila species assessed as least concern.

Physids

Acroloxids

  • Lake limpet (Acroloxus lacustris)

Planorbids: Ram's Horn Snails

This family includes snails with flat, coiled shells.

Lymnaeids: Pond Snails

Chilinids

  • Chilina aurantia
  • Chilina patagonica

Latiids

Neogastropoda: Marine Predatory Snails

Conids: Cone Snails

This family includes many beautiful, often venomous, marine snails.

Eupulmonata: Air-breathing Snails and Slugs

  • Cat's ear cassidula (Cassidula aurisfelis)
  • Judas ear cassidula (Ellobium aurisjudae)
  • Midas ear cassidula (Ellobium aurismidae)
  • Coffee melampus (Melampus coffeus)
  • Mouse ear snail (Myosotella denticulata)

Other Gastropod Species

Bivalves: Clams and Mussels

There are 296 species and two subspecies of bivalves that are least concern. Bivalves have two shells hinged together.

Unionida: Freshwater Mussels

There are 193 species and one subspecies in this group that are least concern.

Etheriids

Unionids

This is a large family of freshwater mussels.

Hyriids

Iridinids

Species

  • Aspatharia rugifera
  • Mutela rostrata

Subspecies

  • Chambardia wahlbergi hartmanni

Mycetopodids

  • Anodontites tenebricosus
  • Lamproscapha ensiformis

Cardiida: Cockles and Giant Clams

Arcida: Ark Clams

  • Scaphula celox
  • Scaphula pinna

Venerida: Venus Clams and Others

There are 96 species and one subspecies in this group that are least concern.

Dreissenids

  • Quagga mussel (Dreissena bugensis)
  • Zebra mussel (Dreissena polymorpha)

Sphaeriids: Fingernail Clams

Cyrenids

Species

  • Golden freshwater clam (Corbicula fluminea)
  • Bengali geloina (Polymesoda bengalensis)
  • Black clam (Villorita cyprinoides)

Subspecies

  • Corbicula fluminalis natalensis

Donacids: Wedge Clams

  • Egeria radiata
  • Iphigenia curta

Other Venerida Species

  • Cyrenoida dupontia
  • Neosolen aquaedulcioris

Mytilida: Mussels

Cephalopods: Octopuses, Squids, and Cuttlefish

There are 197 cephalopod species assessed as least concern. Cephalopods are smart ocean animals like octopuses and squids.

Octopuses

Sepioloida: Bobtail Squids and Cuttlefish

There are 45 species in this group that are least concern.

Sepiids: Cuttlefish

  • Southern cuttlefish (Sepia australis)
  • Knifebone cuttlefish (Sepia cultrata)
  • Common cuttlefish (Sepia officinalis)
  • Papuan cuttlefish (Sepia papuensis)
  • Smith's cuttlefish (Sepia smithi)

Sepiolids: Bobtail Squids

  • Antilles bobtail squid (Austrorossia antillensis)
  • Carol bobtail squid (Neorossia caroli)
  • Lesser shining bobtail squid (Semirossia tenera)

Sepiadariids

  • Koch's bottletail squid (Sepiadarium kochi)

Oegopsina Species: Open-Eyed Squids

There are 126 Oegopsina species assessed as least concern.

Enoploteuthids

Hooked Squids (Onychoteuthidae)

Chiroteuthids

Cranchiids: Glass Squids

Gonatids

  • Minimal armhook squid (Berryteuthis anonychus)
  • Gonatus fabricii

Ommastrephids: Flying Squids

Histioteuthids

Pyroteuthids

Other Oegopsina Species

Bathyteuthida

  • Deepsea squid (Bathyteuthis abyssicola)

Spirulida

See also

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