Pycnodonte (Phygraea) Vyalov 1936 (oyster)

Bivalvia - Ostreida - Gryphaeidae

Alternative spelling: Phygraea

Parent taxon: Pycnodonte according to R. L. Squires and R. Demetrion 1990

See also Gliozzi and Malatesta 1983, Kiessling 2003, Sepkoski 2002 and Wilson 1987

Sister taxa: Gryphaea belli, Pycnodonta vesicularis, Pycnodonte (Costeina), Pycnodonte (Crenostrea), Pycnodonte (Gigantostrea), Pycnodonte (Pegma), Pycnodonte (Pycnodonte), Pycnodonte amakusensis, Pycnodonte costei, Pycnodonte gryphovicinus, Pycnodonte heermanni, Pycnodonte percrassa, Pycnodonte squarrosa, Pycnodonte trigonalis, Pycnodonte vesicularis

Subtaxa: Pycnodonte (Phygraea) pacifica Pycnodonte (Phygraea) proteus Pycnodonte (Phygraea) pseudovesicularis Pycnodonte (Phygraea) vesiculare Pycnodonte (Phygraea) vesiculosum Pycnodonte (Phygraea) wratheri

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Type: Gryphaea pseudovesicularis

Ecology: stationary epifaunal suspension feeder

Distribution:

• Eocene of Mexico (8 collections), United States (3: California)

• Paleocene of Argentina (63), Austria (2), Bulgaria (4), China (2), Denmark (2), France (1)

• Cretaceous of Afghanistan (7), Antarctica (6), Austria (2), Belgium (1), Brazil (15), China (1), the Czech Republic (7), Denmark (1), Egypt (12), France (3), Germany (2), India (1), Italy (2), Jordan (1), Morocco (1), Oman (1), Poland (9), Sweden (1), Switzerland (1), Tunisia (1), the United Arab Emirates (1), the United Kingdom (3), United States (11: Alabama, Arkansas, Mississippi, New Jersey, North Carolina, Tennessee)

Total: 175 collections including 176 occurrences

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