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Stenogmus pentagonalis
Taxonomy
Stenogmus pentagonalis was named by Cooper (1983). Its type specimen is USNM 551155a, a shell, and it is a 3D body fossil. Its type locality is Hägendorf-Homberg, which is in a Callovian marine siliciclastic in the Variansschichten Formation of Switzerland. It is the type species of Stenogmus.
Synonymy list
| Year | Name and author |
|---|---|
| 1983 | Stenogmus pentagonalis Cooper p. 151 figs. Pl 50, figs 1-6; pl 61, figs 27-31 |
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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.
†Stenogmus pentagonalis Cooper 1983
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Diagnosis
No diagnoses are available
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| shell height | 5 | 18.8 | 17.9 | 20.3 | 18.2 | 1.07 |
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| Source: f = family, c = class, p = phylum, uc = unranked clade | |||||
| References: Nesnidal et al. 2013, Aberhan et al. 2004 | |||||
Age range: Early/Lower Callovian or 165.30000 to 161.50000 Ma
Collections (3 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Early/Lower Callovian | Switzerland | Stenogmus pentagonalis (135375 135376 type locality: 135377) |