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Microryctocara nevadensis
Taxonomy
Microryctocara nevadensis was named by Sundberg and McCollum (1997). Its type specimen is USNM 488938, a cephalon/head (cranidium), and it is a 3D body fossil. Its type locality is USNM Locality 41078, which is in a Delamaran marine horizon in the Emigrant Formation of Nevada. It is the type species of Microryctocara.
Synonymy list
| Year | Name and author |
|---|---|
| 1997 | Microryctocara nevadensis Sundberg and McCollum pp. 1085-1086 figs. 15.1-10 |
| 2003 | Microryctocara nevadensis Sundberg and McCollum p. 345 figs. Figure 9.10-9.11 |
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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.
†Microryctocara nevadensis Sundberg and McCollum 1997
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| F. A. Sundberg and L. B. McCollum 1997 | Same as genus. [Isopygous with cranidium subpentagonal, gla bella medially expanded without medial anterior sulcus, only S1 lateral glabellar furrow extending to axial furrow, SI and S2 transglabellar furrows, sinuous axial furrows; basal lobes on LI; fixigena narrow, tapering, posterior area sharply terminated; pal pebral lobes long; surface granular; opisthoparian sutures. Five thoracic segments with pleural bands of uniform length (exsag.), bluntly terminated. Pygidium semicircular, without marginal spines; axis narrow, 4 axial rings; 5 pleural and interpleural fur rows, each pleura equally divided in anterior and posterior bands; pygidial border moderately well defined.] |
Measurements
No measurements are available
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| Source: f = family, o = order, c = class | |||||
| References: Whittington et al. 1997, Aberhan et al. 2004, Hendy et al. 2009 | |||||
Age range: Delamaran or 509.70000 to 505.30000 Ma
Collections (12 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Delamaran | USA (Nevada) | Microryctocara nevadensis (10588 69449 69451 69452 69453 69454 69455 69488 69489 type locality: 205002) | |
| Delamaran | USA (California) | Microryctocara nevadensis (69516 205005) |