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Syspacephalus variosus
Taxonomy
Syspacephalus variosus was named by Sundberg and McCollum (2003). Its type specimen is USNM 517608, a cephalon/head, and it is a 3D body fossil. Its type locality is USNM 41985, Split Mountain, Clayton Ridge, which is in a Delamaran offshore shelf lime mudstone/lime mudstone in the Emigrant Formation of Nevada.
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 2003 | Syspacephalus variosus Sundberg and McCollum pp. 978 - 980 figs. Plate 5, figures 1 - 13 |
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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.
†Syspacephalus variosus Sundberg and McCollum 2003
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| F. A. Sundberg and L.B. McCollum 2003 | Cranidium with glabella narrow and slightly tapered; anterior margin of palpebral lobes adjacent to L3 or S3; fixigena moderately wide; anterior of ®xigena strongly downsloping; granular surface. Librigena with genal spine. |
Measurements
No measurements are available
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| Source: g = genus, f = family, c = class | |||||
| References: Hendy 2009, Aberhan et al. 2004 | |||||
Age range: Delamaran or 509.70000 to 505.30000 Ma
Collections (17 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Delamaran | USA (California) | Syspacephalus variosus (69500 69502 69506 69508 69512 69513 69515 69516) | |
| Delamaran | USA (Nevada) | Syspacephalus variosus (69410 69413 69419 69429 69432 69444 type locality: 69447 69489 69495) |