Planaxidae

Planaxidae; Temporal range: Cretaceous(?) - Recent
	An apertural view of a shell of Angiola fasciata.
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Subclass:	Caenogastropoda
Superfamily:	Cerithioidea
Family:	Planaxidae; Gray, 1850

Planaxidae, commonly called planaxids or clusterwinks, are a taxonomic family of small and minute sea snails, pantropical marine gastropod molluscs in the superfamily Cerithioidea. They live on rocky shores in the littoral zone of the tropics and subtropics.^[2]

Characteristics

Planaxids are known as clusterwinks because of their habit of clustering together in concealed, moist locations when the tide is out. They have conical shells resembling periwinkles, except for the wide, shallow anterior canals. They brood their embryos in a chamber behind their heads, releasing them into the sea as veliger larvae to form part of the plankton.^[2]

Subfamilies

The following two subfamilies are recognized in the taxonomy of Bouchet & Rocroi (2005):

Planaxinae Gray, 1850
Fossarinae A. Adams, 1860 - previously in a family of its own, named Fossaridae

Genera

The family Planaxidae comprises the following genera:^[3] The following genera are recognised: Planaxinae

† Cabania Lozouet & Senut, 1985
Fissilabia Macgillivray, 1836
Halotapada Iredale, 1936
Hinea Gray, 1847
Holcostoma H. Adams & A. Adams, 1853
† Leioplanaxis Lozouet & Maestrati, 1994
† Orthochilus Cossmann, 1889
Planaxis Lamarck, 1822
Simulathena Houbrick, 1992
Supplanaxis Thiele, 1929

Synonyms

Angiola Dall, 1926: synonym of Hinea Gray, 1847
Leucostoma Swainson, 1840: synonym of Fissilabia MacGillivray, 1836 (invalid: junior homonym of Leucostoma Meigen, 1803 [Diptera])
Quoyia Gray, 1839: synonym of Fissilabia MacGillivray, 1836

Fossarinae

Anafossarus Iredale, 1936
Chilkaia Preston, 1915
Fossarus Philippi, 1841
Larinopsis J. H. Gatliff & C. J. Gabriel, 1916
† Medoriopsis Cossmann, 1888
† Vouastia Raspail, 1909

Synonyms

Fossar Gray, 1847: synonym of Fossarus Philippi, 1841 (invalid: unjustified emendation of Fossarus)
Maravignia Aradas & Maggiore, 1844: synonym of Fossarus Philippi, 1841

References

^ Mahmoud, L.G. Etudes paleontologiques sur la fauna Cretacique du Massif du Moghara (Sinai-Egypte). Publications de I'Institut du Desert d'Egypte 8, 1956
^ ^a ^b Beechey, Des (2008). "Family Planaxidae". The Seashells of New South Wales. Retrieved 2014-12-21.
^ Houbrick R. S. (1987). "Anatomy, Reproductive Biology, and Phylogeny of the Planaxidae (Cerithiacea: Prosobranchia)". Smithsonian Contributions to Zoology 445.

Strong E.E., Colgan D.J., Healy J.M., Lydeard C., Ponder W.F. & Glaubrecht M. (2011) Phylogeny of the gastropod superfamily Cerithioidea using morphology and molecules. Zoological Journal of the Linnean Society 162: 43–89.
Bouchet P., Rocroi J.P., Hausdorf B., Kaim A., Kano Y., Nützel A., Parkhaev P., Schrödl M. & Strong E.E. (2017). Revised classification, nomenclator and typification of gastropod and monoplacophoran families. Malacologia. 61(1-2): 1–526.

External links

[1] Mahmoud, L.G. Etudes paleontologiques sur la fauna Cretacique du Massif du Moghara (Sinai-Egypte). Publications de I'Institut du Desert d'Egypte 8, 1956

[Beechey-2] Beechey, Des (2008). "Family Planaxidae". The Seashells of New South Wales. Retrieved 2014-12-21.

[Houbrick-3] Houbrick R. S. (1987). "Anatomy, Reproductive Biology, and Phylogeny of the Planaxidae (Cerithiacea: Prosobranchia)". Smithsonian Contributions to Zoology 445.

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