|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
Bivalvia - Hiatellida - Hiatellidae
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.
|E. L. Packard 1922||Shell short, inequilate ral, tumid, gaping widely posteriorly and little if at all anteriorly; anterior extremity evenly rounded, base broadly arcuate; posterior extremity abruptly truncated; anterior dorsal slope short, slightly concave; posterior dorsal slope long, less oblique than the anterior slope, becoming concave upward toward the anterior end. Umbones prominent; beaks acutely pointed, situated at a point about one-third the distance front the anterior to the posterior end. No lunule; escutcheon ill-defined ancl limited in width by the dorsal edges of the gaping valves . Surface marked by heavy, irregular, incremental lines of growth. Hinge and pallial line unknown. Length of type, 95 mm.; height, 62 mm.; diameter, 45 mm.|