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Arthropterygius hoybergeti
Taxonomy
Palvennia hoybergeti was named by Druckenmiller et al. (2012) [urn:lsid:zoobank.org:act:03BA5E23-17B5-4AB1-B98A-681B9968A3F9]. Its type specimen is SVB 1451, a partial skeleton (a nearly complete skull, atlas/axis complex, proximal and distal portions of a humerus and isolated distal limb elements and several disarticulated dorsal ribs.), and it is a 3D body fossil. Its type locality is North side of Janusfjellet (Palvennia hoybergeti type), which is in a Tithonian deep-water mudstone in the Agardhfjellet Formation of Norway.
It was recombined as Arthropterygius hoybergeti by Zverkov and Prilepskaya (2019).
It was recombined as Arthropterygius hoybergeti by Zverkov and Prilepskaya (2019).
Synonymy list
| Year | Name and author |
|---|---|
| 2012 | Palvennia hoybergeti Druckenmiller et al. p. 326 figs. 12-21 |
| 2019 | Arthropterygius hoybergeti Zverkov and Prilepskaya pp. 31 - 32 fig. 9–12 |
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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.
†Arthropterygius hoybergeti Druckenmiller et al. 2012
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| P. S. Druckenmiller et al. 2012 | Moderately large ophthalmosaurid ichthyosaur (skull length 86 cm) with the following autapomorphies and unique character combinations: relatively short rostrum with snout ratio of 0.59 (relatively longer in Caypullisaurus and more gracile in Aegirosaurus, Nannopterygius); very large orbit (comparatively smaller in Cryopterygius, Brachypterygius, Caypullisaurus); strongly bowed jugal (relatively straight in Cryopterygius, Brachypterygius); narrow postorbital bar (broad in Cryopterygius, Caypullisaurus); frontals mediolateral broad on skull roof (little frontal exposure on skull roof in Athabascasaurus, Ophthalmosaurus); long frontal-postfrontal contact (short in Platypterygius australis, Ophthalmosaurus); very large pineal foramen (autapomorphic); extracondylar area of basioccipital not visible in posterior view (visible in Ophthalmosaurus, Sveltonectes, Acamptonectes) and lacking a ventral notch (ventral notch in Ophthalmosaurus, Mollesaurus); lateral and ventral surface of basioccipital with broad extracondylar area of finished bone (very narrow extracondylar area in Sveltonectes, Brachypterygius); anterior face of basioccipital lacks notochordal pit and basioccipital peg (both present in Arthropterygius); ventral facet of exoccipital not anteriorly elongate (elongated in Brachypterygius, Ophthalmosaurus, P. australis, Acamptonectes); gracile and constricted stapedial shaft (robust shaft without constriction in P. australis and Ophthalmosaurus); facet for preaxial accessory element (absent in Cryopterygius, Nannopterygius, Sveltonectes). |
Measurements
No measurements are available
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| Source: o = order | |||||
| Reference: Kiessling 2004 | |||||