Basic info | Taxonomic history | Classification | Included Taxa |
Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Taxonomy
Neurankylus baueri was named by Gilmore (1916). Its type specimen is USNM 8344, a shell (a complete shell), and it is a 3D body fossil. Its type locality is Ojo Alamo-Hunter (USNM), which is in a Campanian terrestrial horizon in the Kirtland Formation of New Mexico.
It was synonymized subjectively with Neurankylus eximius by Gaffney (1972).
It was synonymized subjectively with Neurankylus eximius by Gaffney (1972).
Synonyms
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Synonymy list
Year | Name and author |
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1916 | Neurankylus baueri Gilmore p. 290 figs. 32-33 |
1930 | Neurankylus baueri Hay p. 70 |
2012 | Neurankylus baueri Sullivan et al. p. 343 |
2013 | Neurankylus baueri Larson et al. |
2015 | Neurankylus baueri Joyce and Lyson p. 160 |
2016 | Neurankylus utahensis Lively |
2016 | Neurankylus hutchisoni Lively p. 3 figs. 2-3 |
2016 | Neurankylus baueri Lyson 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.
†Neurankylus baueri Gilmore 1916
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Invalid names: Neurankylus hutchisoni Lively 2016 [synonym], Neurankylus utahensis Lively 2016 [synonym]
Diagnosis
Reference | Diagnosis | |
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R. M. Sullivan et al. 2012 | Differs from all other species of Neurankylus in having the following combination of characters: gulars well-developed and deep; intergulars Ushaped and in contact with humerals posteriorly (thereby
excluding the gulars from contact across the midline). | |
W. G. Joyce and T. R. Lyson 2015 | Neurankylus baueri is currently diagnosed as a baenid by axillary and inguinal buttresses that reach the costals, a lack of epiplastral processes and the presence of well-developed meso- plastra, and as a representative of Neurankylus by its large size, a smooth shell that lacks both anterior and posterior notches, a complete ring of marginals, wide vertebrals, a small undivided cervical that is taller than wide and lack of contact between the extragulars. Neurankylus baueri is currently differentiated from other Neurankylus by a narrow vertebral V, a scalloped posterior edge of the shell, rectangular posterior neural bones and the development of a weak, disrupted median keel on the carapace. | |
J. R. Lively 2016 (Neurankylus hutchisoni) | Neurankylus hutchisoni differs from all other species of Neurankylus by the presence of a high-domed, laterally rounded carapace (whereas all other members of the genus possess a low-domed carapace with relatively parallel lateral margins), 13 marginal scutes, second marginal with a prominent dorsal projection between vertebral I and pleural I, marginal VIII greatly expanded laterally, marginals V XI exceptionally wide, adult midline carapace length approximately 91 cm, ilial shaft robust and sloped posterodorsally, flange present on anterior rim of acetabulum, and an acetabular fossa that faces posteroventrally. Neurankylus hutchisoni is similar to Neurankylus utahensis sp. nov. in the presence of a rounded anterior plastral lobe that is larger than the posterior plastral lobe. A possible autapomorphy for Neurankylus hutchisoni is the presence of mediolaterally compressed trunk vertebrae with prominent ventral keels (Hutchison et al. 2013). |
Measurements
No measurements are available
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Source: c = class, subp = subphylum, uc = unranked clade | |||||
References: Hendy et al. 2009, Carroll 1988 |
Age range: Late/Upper Campanian or 83.50000 to 70.60000 Ma
Collections (23 total)
Time interval | Ma | Country or state | Original ID and collection number |
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Late/Upper Campanian | USA (Utah) | Neurankylus sp. A (187657 187659 187693 187702 187706 187713) Neurankylus utahensis (219712) Neurankylus utahensis, Neurankylus sp. B (187674) | |
Late/Upper Campanian | USA (New Mexico) | Neurankylus baueri (62317 62318 type locality: 62481 154367 154372 154379 154382 154386 154419 154599 154600 154601) Neurankylus eximius (52052 128456) Neurankylus sp. (100582) |