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Paranecturus garbanii
Taxonomy
Paranecturus garbanii was named by DeMar (2013). Its type specimen is UWBM93370, a set of vertebrae (Incomplete atlas, anterior portion of odontoid process, and portions of the anterior and posterior cotylar rims), and it is a 3D body fossil. Its type locality is Hartless, which is in a Lancian terrestrial horizon in the Hell Creek Formation of Montana. It is the type species of Paranecturus.
Synonymy list
| Year | Name and author |
|---|---|
| 2013 | Paranecturus garbanii DeMar, Jr. |
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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.
†Paranecturus garbanii DeMar, Jr. 2013
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| D. G. DeMar 2013 | Differs from the Sirenidae in having an articular surface of the odontoid process that is not confluent with the anterior cotyles and in lacking transverse processes at the base of the neural arch walls; differs further in having trunk vertebrae lacking the ‘Y’-shaped configuration of the neural crest and paired aliform processes, single-headed rib-bearers on all but the anterior-most trunk vertebrae, anterior basapophyses, and spinal nerve foramina. Differs from the Amphiumidae in lacking a condyle on either side of the ventral midline of the odontoid process of the atlas; differs further in having trunk vertebrae lacking the paired postzygapophyseal crests and anterior basapophyses. Differs from the Batrachosauroididae in having anterior cotyles of atlas that are dorsoventrally compressed and shallowly concave and in having a prominent odontoid process; differs further in having trunk vertebrae that are amphicoelous (except from Palaeoproteus) and in lacking basapophyses (except from Batrachosauroides and Peratosauroides). Differs from the Scapherpetontidae in having an atlas with an alar-like process along the ventrolateral aspect of centrum; differs further in having trunk vertebrae with a prominent groove on the posterior face of the neural arch and in having solid (i.e., lateral ends not hollow) dorsal rib-bearers. Differs from the proteids Proteus anguinus, Mioproteus caucasicus, and Necturus maculosus in having an articular surface of the odontoid process (atlas unknown for N. krausei) not confluent with the anterior cotyles; differs from P. anguinus (following atlantal character states uncertain for M. caucasicus), but similar to N. maculosus, in having an alar-like process along the ventrolateral aspect of centrum; differs from P. anguinus and N. maculosus in having an odontoid process found at approximately midheight of the anterior cotyles (rather than in the dorsal half), in having neural canal partly between the anterior cotyles (rather than above), and in lacking lateral flanges of the neural arch; differs further from P. anguinus, but similar to N. maculosus, in having a dorsally concave and perforated ventromedial surface of the centrum (rather than ventrally convex and non-perforated); trunk vertebrae differ from P. anguinus, M. caucasicus, N. maculosus, and N. krausei in having generally smaller subcentral foramina; differs from P. anguinus and M. caucasicus, but similar to N. maculosus and N. krausei, in having a unicipitate neural spine and divergent, bicipitate rib-bearers; differs from M. caucasicus, but similar to P. anguinus, N. maculosus, and N. krausei, in having a short neural crest and in lacking posterior basapophyses; differs further from N. krausei, but similar to N. maculosus, in having a solid dorsal rib-bearer; differs from N. maculosus, but similar to N. krausei, in having anteroposteriorly elongate postzygapophyses. |
Measurements
No measurements are available
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| Source: subo = suborder, c = class, subp = subphylum, uc = unranked clade | |||||
| References: Uhen 2004, Carroll 1988, Hendy et al. 2009 | |||||