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Taxonomy
Egrona was named by Saul (1993) [Sepkoski's age data: K Turo Sepkoski's reference number: 1067]. Its type is Egrona fallax.
It was assigned to Pitarinae by Saul (1993); and to Veneroida by Sepkoski (2002).
It was assigned to Pitarinae by Saul (1993); and to Veneroida by Sepkoski (2002).
Species
E. fallax (type species)
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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.
Diagnosis
Reference | Diagnosis | |
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L. R. Saul 1993 | Veneriform bivalves having smooth exterior except for growth lines; lunule depressed, set off by incised line; escutcheon of left valve obscurely delimited by angulation; three cardinals in each valve; right posterior cardinal bifid; an elongate, smooth sided anterior lateral tooth in left valve; shell margin of right valve grooved parallel to margin posterior to ligament; nymphs smooth; pallial sinus moderately deep and angular. |