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Plaesiomys idahoensis
Taxonomy
Plaesiomys subquadratus idahoensis was named by Ross (1959). Its type specimen is USNM 133239 and is a 3D body fossil. Its type locality is D240 CO. On ridge between Black Canyon and South Creek, just north of divide, which is in a Richmondian carbonate limestone in the Saturday Mountain Formation of Idaho.
It was recombined as Plaesiomys idahoensis by Wright and Stigall (2013).
It was recombined as Plaesiomys idahoensis by Wright and Stigall (2013).
Synonymy list
| Year | Name and author |
|---|---|
| 1959 | Plaesiomys subquadratus idahoensis Ross p. 449 figs. pl. 54, figs. 29, 30, 33, 34, 37, 38, 41, 42, pl. 55, figs. 22, 26, 27, 30, 31 |
| 2013 | Plaesiomys idahoensis Wright and Stigall p. 1120 figs. 6.7, 6.8 |
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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.
†Plaesiomys idahoensis Ross 1959
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| D. F. Wright and A. L. Stigall 2013 | Small to moderate size Plaesiomys species with a wide hingeline and low ventral cardinal area. Shell outline subquadrate to subelliptical, highly convex valves of variable depth; costal density high relative to maximum width; ventral valve shallow to inflated, delthryium oriented at a high angle; ventral interior muscle field long; dorsal valve inflated with shallow to deep sulcus; dorsal interarea orthocline to apsacline; high dorsal umbonal angle. Emended from Ross (1959). |