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Rugarhynchos sixmilensis
Taxonomy
Doswellia sixmilensis was named by Heckert et al. (2012). Its type specimen is NMMNH P-61909, a partial skeleton (portions of the skull and lower jaws, several centra, and osteoderms, as well as two possible limb bone fragments), and it is a 3D body fossil. Its type locality is Sixmile Canyon, near Gallup, NMMNH L-5700, which is in a Norian terrestrial mudstone in the Chinle Formation of New Mexico.
It was recombined as Rugarhynchos sixmilensis by Wynd et al. (2020).
It was recombined as Rugarhynchos sixmilensis by Wynd et al. (2020).
Synonymy list
| Year | Name and author |
|---|---|
| 2012 | Doswellia sixmilensis Heckert et al. p. 1336 figs. 2-6 |
| 2013 | Doswellia sixmilensis Sues et al. |
| 2020 | Rugarhynchos sixmilensis Wynd et al. |
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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.
†Rugarhynchos sixmilensis Heckert et al. 2012
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| A. B. Heckert et al. 2012 | Species of Doswellia distinguished from the type species, D. kaltenbachi, by a higher tooth count, a prominent ridge on the postorbital, the presence of keels on cervical centra and the presence of discrete knobs or spikes on some osteoderms. The holotype is significantly (50 per cent) larger than any known specimen of D. kaltenbachi and appears to exhibit greater heterodonty in tooth size, but the type series of both specimens are too incomplete to reliably compare. We note that many of the diagnostic characters of the genus as enumerated above by Dilkes and Sues (2009) are not preserved in the holotype of D. sixmilensis and discovery of more complete material will doubtless modify the generic diagnosis. |