| Palvennia | |
|---|---|
Scientific classification | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Reptilia |
| Order: | †Ichthyosauria |
| Family: | †Ophthalmosauridae |
| Genus: | †Palvennia Druckenmilleret al.,2012 |
| Type species | |
| †Palvennia hoybergeti Druckenmilleret al., 2012 | |
Palvennia is anextinctgenus ofophthalmosauridichthyosaurian known from the uppermostJurassic of CentralSpitsbergen,Norway.[1][2] It was named for PalVenn, the Friends of the Palaeontological Museum in Oslo, whose expedition led to the discovery of the type specimen.Palvennia was a medium-sized ichthyosaur, measuring 3–4 m (9.8–13.1 ft) long.[3] It was originally known from a single skull from the Slottsmøya Member of the Agardhfjellet Formation (middle Volgian/lateTithonian, Late Jurassic) that measures 86 cm (2 ft 10 in) long. It is unusual in having a very short rostrum (~0.6× the skull length), similar toIchthyosaurus breviceps. Because of this, the orbit seems very large (0.34× the skull length), but this may be affected by crushing. The single and only known species isPalvennia hoybergeti Druckenmilleret al., 2012.[1] A second specimen, which included both cranial and anterior postcranial material, was described in 2018.[4] In 2019,Palvennia was synonymized withArthropterygius, though maintained as a separate species, by Nikolay Zverkov and Natalya Prilepskaya,[5] although this synonymy was objected to later that same year by Lene Delsett and colleagues, who maintained that they were sufficiently different to warrant separate genera.[6]
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