Biology:List of critically endangered molluscs

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Critically endangered (CR) species face an extremely high risk of extinction in the wild.

As of September 2016, the International Union for Conservation of Nature (IUCN) listed 581 critically endangered mollusc species, including 117 which are tagged as possibly extinct.[1][2] Of all evaluated mollusc species, 8.0% are listed as critically endangered. The IUCN also lists 11 mollusc subspecies as critically endangered.

No subpopulations of molluscs have been evaluated by the IUCN.

Additionally 1988 mollusc species (27% of those evaluated) are listed as data deficient, meaning there is insufficient information for a full assessment of conservation status. As these species typically have small distributions and/or populations, they are intrinsically likely to be threatened, according to the IUCN.[3] While the category of data deficient indicates that no assessment of extinction risk has been made for the taxa, the IUCN notes that it may be appropriate to give them "the same degree of attention as threatened taxa, at least until their status can be assessed".[4]

This is a complete list of critically endangered mollusc species and subspecies evaluated by the IUCN. Species considered possibly extinct by the IUCN are marked as such.

Gastropods

There are 511 species and six subspecies of gastropod assessed as critically endangered.

Stylommatophora

Stylommatophora includes the majority of land snails and slugs. There are 233 species and five subspecies in the order Stylommatophora assessed as critically endangered.

Amastrids

Partulids

Achatinellids

Endodontids

Species

Subspecies

Charopids

  • Charopa lafargei
  • Ammonite snail (Helenoconcha relicta)
  • Kondoconcha othnius
  • Lauopa mbalavuana (possibly extinct)
  • Maafu thaumasius
  • Mautodontha boraborensis
  • Mautodontha ceuthma
  • Opanara altiapica
  • Opanara areaensis
  • Opanara bitridentata
  • Opanara caliculata
  • Opanara depasoapicata
  • Opanara duplicidentata
  • Opanara fosbergi
  • Opanara megomphala
  • Opanara perahuensis
  • Orangia maituatensis
  • Palline notera
  • Radioconus goeldi
  • Rhysoconcha variumbilicata
  • Ruatara koarana
  • Semperdon kororensis
  • Semperdon xyleborus
  • Sinployea angularis
  • Sinployea navutuenis
  • Dlinza Forest pinwheel (Trachycystis clifdeni)
  • Trachycystis placenta
  • Vatusila kondoi
  • Vatusila nayauana

Helicarionids

  • Coneuplecta turrita (possibly extinct)
  • Erepta stylodon
  • Harmogenanina implicata
  • Sesara sp. 'Bai Voi'
  • Zingis radiolata (possibly extinct)

Orthalicids

Rhytidids

Streptaxids

Lauriids

Helicids

Hygromiids

Enids

Other Stylommatophora species

  • Atlantica guerinianus
  • Bertia cambojiensis
  • Cecilioides eulima
  • Cecilioides jeskalovicensis
  • Cerion nanus
  • Draparnaudia anniae
  • Draparnaudia subnecata
  • Dupontia levensonia
  • Gonyostomus gonyostomus
  • Gyliotrachela luctans
  • Helicostyla smargadina
  • Banded dune snail (Helminthoglypta walkeriana)
  • Hirinaba curytibana
  • Hypselostoma elephas
  • Magazine Mountain middle-toothed snail (Inflectarius magazinensis)
  • Lampedusa melitensis
  • Megalobulimus grandis
  • Megalobulimus proclivis
  • Fraternal snail (Micrarionta feralis)
  • Monilearia arguineguinensis
  • Monilearia granostriata
  • Monilearia pulverulenta (possibly extinct)
  • Monilearia tumulorum
  • Orcula fuchsi
  • Oxyloma kanabense
  • Pachnodus oxoniensis
  • Paraboysidia serpa
  • Plutonia angulosa
  • Plutonia falcifera
  • Plutonia machadoi
  • Plutonia reticulata
  • Catalina mountain snail (Radiocentrum avalonense)
  • Succinea rotumana (possibly extinct)
  • Trochochlamys ogasawarana
  • Trochomorpha kambarae
  • Trochomorpha moalensis
  • Trochomorpha planoconus
  • Trochomorpha tuvuthae
  • Videna pagodula
  • Videna pumila
  • Zilchogyra paulistana

Littorinimorpha

There are 181 species in the order Littorinimorpha assessed as critically endangered.

Hydrobiids

Cochliopids

  • Heleobia dobrogica
  • Heleobia tritonum
  • Brune's tryonia (Tryonia brunei) (possibly extinct)

Bithyniids

  • Bithynia kastorias
  • Gabbia alticola
  • Gabbiella candida
  • Gabbiella depressa
  • Gabbiella matadina (possibly extinct)
  • Gabbiella neothaumaeformis
  • Gabbiella parva
  • Incertihydrobia teesdalei
  • Jubaia aethiopica
  • Pseudobithynia euboeensis
  • Pseudobithynia falniowskii
  • Pseudobithynia kathrinae
  • Pseudobithynia panetolis
  • Sierraia outambensis
  • Soapitia dageti (possibly extinct)

Moitessieriids

  • Henrigirardia wienini (possibly extinct)
  • Spiralix corsica (possibly extinct)

Assimineids

  • Kubaryia pilikia (possibly extinct)
  • Omphalotropis ingens (possibly extinct)
  • Pseudogibbula cara (possibly extinct)
  • Pseudogibbula duponti
  • Septariellina congolensis
  • Valvatorbis mauritii (possibly extinct)

Pomatiopsids

Sorbeoconcha

  • Pleurocera ampla (Elimia ampla)
  • Lily Shoals elimia (Elimia annettae)
  • Princess elimia (Elimia bellacrenata)
  • Mossy elimia (Elimia troostiana) (possibly extinct)
  • Leptoxis melanoides
  • Plicate rocksnail (Leptoxis plicata)
  • Melanoides agglutinans (possibly extinct)
  • Melanopsis ammonis
  • Melanopsis brevicula
  • Melanopsis chlorotica
  • Melanopsis germaini (possibly extinct)
  • Melanopsis infracincta (possibly extinct)
  • Melanopsis khabourensis (possibly extinct)
  • Melanopsis pachya (possibly extinct)
  • Melanopsis parreyssii
  • Melanopsis penchinati
  • Melanopsis saharica
  • Corpulent hornsnail (Pleurocera corpulenta)
  • Potadoma kadeii
  • Potadoma wansoni
  • Pseudocleopatra dartevellei
  • Tylomelania kruimeli

Architaenioglossa

There are 48 species in the order Architaenioglossa assessed as critically endangered.

Cyclophorids

  • Alycaeus balingensis
  • Boucardicus fidimananai
  • Boucardicus fortistriatus
  • Boucardicus simplex
  • Madgeaconcha sevathiani (possibly extinct)

Diplommatinids

Viviparids

Other Architaenioglossa species

Cycloneritimorpha

Hygrophila

Species

Subspecies

  • Bulinus tropicus torensis

Neogastropoda

Other gastropod species

Bivalvia

There are 69 species and five subspecies in the class Bivalvia assessed as critically endangered.

Unionida

There are 66 species and five subspecies in the order Unionoida assessed as critically endangered.

Margaritiferids

Species

Subspecies

  • Margaritifera margaritifera durrovensis

Etheriids

  • Acostaea rivolii

Unionids

Species

Subspecies

  • Curtis' naiad (Epioblasma florentina curtisi)
  • Brown-blossom naiad (Epioblasma florentina walkeri)
  • White catspaw (Epioblasma obliquata perobliqua)
  • Northern riffleshell (Epioblasma torulosa rangiana)

Hyriids

Venerida

Cephalopods

See also

References

  1. ↑ "IUCN Red List version 2016-2". International Union for Conservation of Nature and Natural Resources (IUCN). http://www.iucnredlist.org/. Retrieved 8 September 2016. 
  2. ↑ "Table 9: Possibly Extinct and Possibly Extinct in the Wild Species (IUCN Red List version 2016-2)". Union for Conservation of Nature and Natural Resources (IUCN). http://www.iucnredlist.org/about/summary-statistics. Retrieved 8 September 2016. 
  3. ↑ "Limitations of the Data". Union for Conservation of Nature and Natural Resources (IUCN). http://www.iucnredlist.org/initiatives/mammals/description/limitations. Retrieved 11 January 2016. 
  4. ↑ "2001 Categories & Criteria (version 3.1)". Union for Conservation of Nature and Natural Resources (IUCN). http://www.iucnredlist.org/static/categories_criteria_3_1. Retrieved 11 January 2016. 




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