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Ischnoptygma archibaldi
Taxonomy
Ischnoptygma archibaldi was named by Erwin (1988). Its type specimen is USHM 400659, a shell, and it is not a trace fossil. Its type locality is USNM703, Old Word Ranch, Glass Mountains, which is in a Roadian reef, buildup or bioherm limestone in the Road Canyon Formation of Texas.
Synonymy list
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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.
†Ischnoptygma archibaldi Erwin 1988
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Diagnosis
No diagnoses are available
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| shell height | 2 | 19.1 | 17.0 | 21.5 | 19.2 | 3.18 |
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| Source: o = order | |||||
| Reference: Bambach et al. 2007 | |||||