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Crurithyris alaskensis
Taxonomy
Crurithyris alaskensis was named by Savage et al. (1978). Its type specimen is USNM 223911 and is a 3D body fossil. Its type locality is Port Refugio 1, which is in a Famennian marine siliciclastic/limestone in the Port Refugio Formation of Alaska.
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1978 | Crurithyris alaskensis Savage et al. p. 379 figs. Pl. 2, figs. 51-60; Text-fig. 9 |
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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.
†Crurithyris alaskensis Savage et al. 1978
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| N. M. Savage et al. 1978 | A Crurithyris with a small ventral umbo, weak sulci in both valves, and parallel crural plates which extend along the valve floor for one-fifth of the valve length. |