Assimineidae

Assimineidae is a family of minute snails with an operculum, gastropod mollusks or micromollusks in the superfamily Rissoidae. Many of these very small snails live in intermediate habitats, being amphibious between saltwater and land; others live in freshwater.

Assimineidae
Temporal range: Cenomanian–Recent
Apertural view of a shell of Assiminea grayana
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Subclass: Caenogastropoda
Order: Littorinimorpha
Superfamily: Truncatelloidea
Family: Assimineidae
H. Adams & A. Adams, 1856
Subfamilies
  • Assimineinae
  • Ekadantinae
  • Omphalotropidinae
Diversity[1]
About 20 freshwater species and numerous amphibious terrestrial/marine species
Synonyms
  • Omphalotropidinae Thiele, 1927· accepted, alternate representation
  • Thaanumellinae Clench, 1946

Distribution

The distribution of the Assimineidae is worldwide.[2] The oldest fossils are known from the Cenomanian aged Burmese amber.[3]

Ecology

Various species in this family occur in estuarine habitats, in salt marshes and in freshwater. Some are terrestrial or amphibious.

Description

The shell is small to medium large, more or less egg-conelike shaped.[2] The apertural margin is simple.[2] The operculum is in most cases horny.[2]

Species in this family are characterized by rudimentary cephalic tentacles, a trunklike snout, a foot with a groove and rudimentary to absent ctenidium (a comb-like respiratory apparatus).[4]

Taxonomy

The following three subfamilies were recognized in the taxonomy of Bouchet & Rocroi (2005):

  • Subfamily Assimineinae H. Adams & A. Adams, 1856 - synonym: Synceratidae Bartsch, 1920
  • Subfamily Ekadantinae Thiele, 1929 - synonyms: Paludinellidae Kobelt, 1878 (n.a.); Cyclotropidae Iredale, 1941
  • Subfamily Omphalotropidinae Thiele, 1927 - Realiinae L. Pfeiffer, 1853 (inv.); Adelomorphinae Kobelt, 1906 (inv.); Garrettiinae Kobelt, 1906; Pseudocyclotini Thiele, 1929; Thaanumellinae Clench, 1946; Tutuilanidae Hubendick, 1952

Genera

Genera in the family Assimineidae include:[5][6][7]

subfamily Assimineinae

  • Assiminea Fleming, 1828 - type genus of Assimineidae, synonym: Assiminia
  • Austropilula Thiele, 1927
  • Aviassiminea Fukuda & Ponder, 2003
  • Conassiminea Fukuda & Ponder, 2006
  • Cryptassiminea Fukuda & Ponder, 2005
  • Euassiminea Heude, 1882
  • Macrassiminea Thiele, 1927
  • Ovassiminea Thiele, 1927
  • Pseudomphala Heude, 1882
  • Sculptassiminea Thiele, 1927

subfamily Ekadantinae

  • Acmella Blanford, 1869
  • Cyclotropis Tapparone Canefri, 1883
  • Ekadanta Rao, 1928
  • Metassiminea Thiele, 1927
  • Optediceros Leith, 1853
  • Paludinella Pfeiffer, 1841
  • Rugapedia Fukuda & Ponder, 2004
  • Solenomphala Heude, 1882
  • Taiwanassiminea Kuroda & Habe, 1950

subfamily Omphalotropidinae

  • Omphalotropis Pfeiffer, 1851 - type genus of the subfamily Omphalotropidinae
  • Garrettia Paetel, 1873
  • Pseudocyclotus Thiele, 1894
  • Thaanumella Clench, 1946

Subfamily Garrettiinae Kobelt, 1906

  • Anaglyphula B. Rensch, 1932
  • Atropis Pease, 1871
  • Austroassiminea Solem, Girardi, Slack-Smith & Kendrick 1982
  • Balambania Crosse, 1891
  • Chalicopoma Möllendorff, 1894
  • Conacmella Thiele, 1925
  • Crossilla Thiele, 1927
  • Cyclomorpha Pease, 1871
  • Ditropisena Iredale, 1933
  • Duritropis Iredale, 1944
  • Electrina Baird, 1850
  • Eussoia Preston, 1912
  • Fijianella Cooke & Clench, 1943
  • Garrettia Paetel, 1873
  • Kubaryia Clench, 1948
  • Leucostele Thiele, 1927
  • Limborelia Iredale, 1944
  • Nesopoma Clench, 1958
  • Omphalotropis L. Pfeiffer, 1851
  • Opinorelia Iredale, 1944
  • Paludinellassiminea Habe, 1994
  • Ponapella Clench, 1946
  • Pseudassiminea Thiele, 1927
  • Pseudocyclotus Thiele, 1894
  • Pseudogibbula Dautzenberg, 1890
  • Quadrasiella Moellendorff, 1894
  • Rapanella Cooke & Clench, 1943
  • Rupacilla Thiele, 1927
  • Scalinella Pease, 1867
  • Schuettiella Brandt, 1974
  • Setaepoma Clench, 1955
  • Spiratropis Kobelt & Möllendorff, 1900
  • Suterilla Thiele, 1927
  • Sychnotropis Möllendorff, 1898
  • Telmosena Iredale, 1944
  • Thaanumella Clench, 1946
  • Turbacmella Thiele, 1927
  • Tutuilana Hubendick, 1952
  • Wrayanna Clench, 1948

subfamily ?

  • Afroassiminea
  • Angustassiminea Habe, 1943
  • Heteropoma Benson, 1856
  • Septariellina
incertae sedis
  • Assimineidae incertae sedis vulgaris Webster, 1905 [8]

References

This article incorporates public domain text from the reference.[2]

  1. Strong E. E., Gargominy O., Ponder W. F. & Bouchet P. (2008). "Global Diversity of Gastropods (Gastropoda; Mollusca) in Freshwater". Hydrobiologia 595: 149-166. hdl:10088/7390 doi:10.1007/s10750-007-9012-6.
  2. "Family summary for Assimineidae". AnimalBase, last change 15-08-2006, accessed 4 August 2010.
  3. Bullis, David A.; Herhold, Hollister W.; Czekanski-Moir, Jesse E.; Grimaldi, David A.; Rundell, Rebecca J. (March 2020). "Diverse new tropical land snail species from mid-Cretaceous Burmese amber (Mollusca: Gastropoda: Cyclophoroidea, Assimineidae)". Cretaceous Research. 107: 104267. doi:10.1016/j.cretres.2019.104267.
  4. Abbott, R.T. (1958). "The gastropod genus Assiminea in the Philippines". Proceedings of the Academy of Natural Sciences of Philadelphia. 110: 213–278.
  5. "Assimineidae". Integrated Taxonomic Information System.
  6. Ingentaconnect
  7. ZipCodeZoo Archived February 10, 2012, at the Wayback Machine
  8. Rosenberg, G. (2012). Assimineidae incertae sedis vulgaris. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=598622 on 2012-05-31

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