|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||Age range and collections|
Bivalvia - Ostreida - Gryphaeidae
It was reranked as Ostrea (Pycnodonte) by Olsson and Richards (1961), Moore (1987) and Maxwell (1992); it was corrected as Pycnodonte by Vokes (1980), Woodring (1982), Tashiro and Kozai (1982), Gliozzi and Malatesta (1983), Squires and Demetrion (1990), Beu et al. (1990), Ward (1992), Perrilliat (1994), Stilwell (1998) and El Qot (2006).
It was assigned to Ostrea by Olsson and Richards (1961); to Ostreidae by Tashiro and Kozai (1982); to Pycnodontinae by Ward (1992); to Pycnodonteinae by Vokes (1980), Woodring (1982), Gliozzi and Malatesta (1983), Moore (1987), Squires and Demetrion (1990), Beu et al. (1990), Maxwell (1992), Perrilliat (1994) and Stilwell (1998); to Pterioida by Sepkoski (2002); and to Gryphaeidae by El Qot (2006).
|Year||Name and author|
|1835||Pycnodonta Fischer von Waldheim|
|1961||Ostrea (Pycnodonte) Olsson and Richards p. 4|
|1980||Pycnodonte Vokes p. 64|
|1982||Pycnodonte Tashiro and Kozai p. 77|
|1982||Pycnodonte Woodring p. 606|
|1983||Pycnodonte Gliozzi and Malatesta p. 89|
|1987||Ostrea (Pycnodonte) Moore p. 18|
|1990||Pycnodonte Beu et al. p. 396|
|1990||Pycnodonte Squires and Demetrion p. 386|
|1992||Ostrea (Pycnodonte) Maxwell p. 69|
|1992||Pycnodonte Ward p. 75|
|1994||Pycnodonte Perrilliat p. 233|
|1998||Pycnodonte Stilwell p. 50|
|2002||Pycnodonta Sepkoski, Jr.|
|2006||Pycnodonte El Qot p. 35|
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.