Poromyidae
Poromyidae is a family (biology), family of saltwater clams, marine (ocean), marine bivalve molluscs in the order (biology), order Anomalodesmata. The genus ''Dilemma (bivalve), Dilemma'', described in 2008, is remarkable for being a predator of copepods, which is very unusual for a Sessility (zoology), sessile mollusc. Genera and species Genera and species within the family Poromyidae include: *''Cetomya'' W. H. Dall, Dall, 1889 *''Dermatomya'' W. H. Dall, Dall, 1889 **''Dermatomya buttoni'' W. H. Dall, Dall, 1916 ** ''Dermatomya mactroides'' (W. H. Dall, Dall, 1889) * ''Dilemma (bivalve), Dilemma'' Leal, 2008 *''Lissomya'' Krylova, 1997 * ''Poromya'' Forbes, 1844 ** ''Poromya albida'' W. H. Dall, Dall, 1886 ** ''Poromya beringiana'' (W. H. Dall, Dall, 1916) ** ''Poromya elongata'' W. H. Dall, Dall, 1886 ** ''Poromya granulata'' (Nyst and Westendorp, 1839) ** ''Poromya houbricki'' Bernard, 1989 ** ''Poromya laevis'' E. A. Smith, 1885 ** ''Poromya leonina'' (W. H. Dall, Dall, 191 ...
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Dilemma (bivalve)
''Dilemma'' is a genus (biology), genus of marine (ocean), marine bivalves of the family (biology), family Poromyidae. The genus is remarkable for encompassing predators of isopods and ostracods, unusual for Sessility (zoology), sessile molluscs. One species is known from the western Atlantic Ocean (Straits of Florida) and three from across the Pacific. Specimens have been found at depths between . The name of the genus refers to the dilemma that the author of the new genus faced while diagnosing it. Species There are four species: * ''Dilemma frumarkernorum'' Leal, 2008 * ''Dilemma inexpectatum'' (Crozier, 1966) * ''Dilemma japonicum'' Sasaki & Leal, 2008 * ''Dilemma spectralis'' Leal, 2008 References

Poromyidae Bivalve genera {{bivalve-stub ...
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