Dilemma (bivalve)

Dilemma is a genus of marine bivalves of the family Poromyidae.^[1] The genus is remarkable for encompassing predators of isopods and ostracods, unusual for sessile molluscs.^[2] 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 229–961 m (751–3,153 ft).^[2][3] The name of the genus refers to the dilemma that the author of the new genus faced while diagnosing it.^[2]

Dilemma
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Bivalvia
Superorder:	Anomalodesmata
Superfamily:	Poromyoidea
Family:	Poromyidae
Genus:	Dilemma Leal, 2008
Species
4 species (see text)

Species

There are four species:^[1]

• Dilemma frumarkernorum Leal, 2008^[2]
• Dilemma inexpectatum (Crozier, 1966)
• Dilemma japonicum Sasaki & Leal, 2008^[3]
• Dilemma spectralis Leal, 2008^[2]