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Oryctocephalus primus
Taxonomy
Oryctocephalus primus was named by Walcott (1886). Its type specimen is USNM 15427A (lectotype), a cephalon/head, and it is a 3D body fossil. It is the type species of Oryctocephalus.
Synonymy list
| Year | Name and author |
|---|---|
| 1886 | Oryctocephalus primus Walcott p. 210 figs. PL 29, figs. 3a, 3b; |
| 1889 | Oryctocephalus primus Miller p. 558 figs. figs. 1036, 1037 |
| 1890 | Oryctocephalus primus Walcott p. 653 figs. PI. 95, figs. 4, 4a |
| 1954 | Oryctocephalus primus Palmer p. 68 figs. PI. 15, figs. 1, 2 |
| 1968 | Oryctocephalus primus Fritz pp. 201 - 202 figs. PI. 40, figs. 14-16 |
| 1969 | Oryctocephalus primus Shergold pp. 15 - 16 figs. figs. 4a, 4b |
| 1997 | Oryctocephalus primus Sundberg and McCollum p. 1071 figs. Figure 8.1-8.14 |
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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.
†Oryctocephalus primus Walcott 1886
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| A. R. Palmer 1954 | Pygidium with long, slender marginal spines. | |
| F. A. Sundberg and L. B. McCollum 1997 | Cranidium with glabella parallel sided, SI to S3 transglabellar furrows, eye ridges directed strongly pos- terolaterally (50-65 degrees), fixigena narrow (55-70 percent glabellar width), anterior margin moderately curved, and ante rior border without curvature towards frontal lobe. Pygidium with 5 axial rings; anterior pleural bands short (exsag.) with cylindrical spines; VI and V2 spines projecting laterally; V3 spine projects more posteriorly; V4 and V5 spines projecting posteriorly; spines increasing in length posteriorly except V5 which is small. |
Measurements
No measurements are available
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| Source: g = genus, f = family, o = order, c = class | |||||
| References: Hendy 2009, Hendy et al. 2009, Aberhan et al. 2004, Whittington et al. 1997 | |||||