Lyonsiidae is a
family
Family (from la, familia) is a group of people related either by consanguinity (by recognized birth) or affinity (by marriage or other relationship). The purpose of the family is to maintain the well-being of its members and of society. Idea ...
of small saltwater clams,
marine bivalve molluscs
Mollusca is the second-largest phylum of invertebrate animals after the Arthropoda, the members of which are known as molluscs or mollusks (). Around 85,000 extant species of molluscs are recognized. The number of fossil species is estim ...
in the
order Anomalodesmata
Anomalodesmata is an superorder of saltwater clams, marine bivalve molluscs. This grouping was formerly recognised as a taxonomic subclass. It is called a superorder in the current World Register of Marine Species, despite having no orders, to ...
.
Description
Members of this family have inequivalve, oblong
valves
A valve is a device or natural object that regulates, directs or controls the flow of a fluid (gases, liquids, fluidized solids, or slurries) by opening, closing, or partially obstructing various passageways. Valves are technically fitting ...
that are nearly equilateral. The right valve is more convex than the left, and there are usually no
teeth
A tooth ( : teeth) is a hard, calcified structure found in the jaws (or mouths) of many vertebrates and used to break down food. Some animals, particularly carnivores and omnivores, also use teeth to help with capturing or wounding prey, t ...
. The ligament connecting the two valves is in an internal groove, and the hinge has a free ossicle.
Genera and species
The
World Register of Marine Species
The World Register of Marine Species (WoRMS) is a taxonomic database that aims to provide an authoritative and comprehensive list of names of marine organisms.
Content
The content of the registry is edited and maintained by scientific specialis ...
lists the following
genera and
species
In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of the appropriate s ...
in the family:
[
*'' Allogramma'' Dall, 1903
**'' Allogramma elegans'' (Thiele & Jaeckel, 1931)
**'' Allogramma formosa'' (Jeffreys, 1882)
**'' Allogramma oahuense'' (Dall, 1913)
*'' Bentholyonsia'' Habe, 1952
**'' Bentholyonsia teramachii'' (Habe, 1952)
*'' Entodesma'' Phillips, 1845
**'' Entodesma beana'' (]d'Orbigny
Alcide Charles Victor Marie Dessalines d'Orbigny (6 September 1802 – 30 June 1857) was a French naturalist who made major contributions in many areas, including zoology (including malacology), palaeontology, geology, archaeology and anthrop ...
, 1853)
**'' Entodesma brasiliense'' (Gould, 1850)
**'' Entodesma brevifrons'' (G.B. Sowerby I, 1834)
**'' Entodesma cuneata'' (Gray, 1828)
**'' Entodesma delicatum'' (Marincovich, 1973)
**'' Entodesma elongatulum'' Soot-Ryen, 1957
**'' Entodesma fretalis'' (Dall, 1915)
**'' Entodesma lucasana'' (Bartsch & Rehder, 1939)
**'' Entodesma navicula'' ( A. Adams and Reeve, 1850)
**'' Entodesma patagonicum'' (d'Orbigny, 1846)
**'' Entodesma pictum'' (G. B. Sowerby I, 1834)
**'' Entodesma saxicola'' (Baird, 1863)
**'' Entodesma sechuranum'' Pilsbry & Olsson, 1935
**'' Entodesma solemyalis'' (Lamarck, 1818)
**'' Entodesma weisbordi'' Macsotay & Campos, 2001
*'' Lyonsia'' Turton, 1822
**'' Lyonsia adriatica''
**'' Lyonsia alvarezii'' d'Orbigny, 1846
**'' Lyonsia arcaeforme'' Martens, 1885
**'' Lyonsia arenosa'' (Moller, 1842)
**'' Lyonsia argentea'' Jeffreys, 1881
**'' Lyonsia bracteata'' (Gould
Gould may refer to:
People
* Gould (name), a surname
Places United States
* Gould, Arkansas, a city
* Gould, Colorado, an unincorporated community
* Gould, Ohio, an unincorporated community
* Gould, Oklahoma, a town
* Gould, West Virginia, a ...
, 1850)
**'' Lyonsia californica'' Conrad, 1837
**'' Lyonsia cucumerina'' Ivanova in Scarlato, 1981
**'' Lyonsia floridana'' Conrad, 1849
**'' Lyonsia granulifera'' A. E. Verrill and Bush, 1898
**'' Lyonsia hyalina'' Conrad, 1831
**'' Lyonsia kawamurai'' Habe, 1952
**'' Lyonsia malvinensis'' d'Orbigny, 1846
**'' Lyonsia norvegica'' ( J.F. Gmelin, 1791)
**'' Lyonsia nuculaniformis'' Scarlato, 1981
**'' Lyonsia panamensis'' Dall, 1908
**'' Lyonsia praetenuis'' Dunker, 1882
**'' Lyonsia shimkevitch'' (M. Sars, 1868)
**'' Lyonsia striata'' ( Montagu, 1815)
**'' Lyonsia taiwanica'' Lan & Okutani, 2002
**'' Lyonsia ventricosa'' Gould, 1861
**'' Lyonsia vniroi'' Scarlato, 1981
References
Bivalve families
{{Bivalve-stub