A prevalence of Arthropterygius (Ichthyosauria: Ophthalmosauridae) in the Late Jurassic—earliest Cretaceous of the Boreal Realm
The ichthyosaur genus Arthropterygius Maxwell, 2010 is considered as rare and poorly known. However, considering the existing uncertainty regarding its position in respect to ophthalmosaurid subfamilies in recent phylogenies, it is among the key taxa for understanding the evolution of derived Late J...
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ftdoajarticles:oai:doaj.org/article:42b537fa51a74dc99850209b2b5a4b5c 2024-01-07T09:41:55+01:00 A prevalence of Arthropterygius (Ichthyosauria: Ophthalmosauridae) in the Late Jurassic—earliest Cretaceous of the Boreal Realm Nikolay G. Zverkov Natalya E. Prilepskaya 2019-04-01T00:00:00Z https://doi.org/10.7717/peerj.6799 https://doaj.org/article/42b537fa51a74dc99850209b2b5a4b5c EN eng PeerJ Inc. https://peerj.com/articles/6799.pdf https://peerj.com/articles/6799/ https://doaj.org/toc/2167-8359 doi:10.7717/peerj.6799 2167-8359 https://doaj.org/article/42b537fa51a74dc99850209b2b5a4b5c PeerJ, Vol 7, p e6799 (2019) Ophthalmosauridae Late Jurassic Arthropterygius Berriassian Ichthyosauria Palaeobiogeography Medicine R Biology (General) QH301-705.5 article 2019 ftdoajarticles https://doi.org/10.7717/peerj.6799 2023-12-10T01:49:41Z The ichthyosaur genus Arthropterygius Maxwell, 2010 is considered as rare and poorly known. However, considering the existing uncertainty regarding its position in respect to ophthalmosaurid subfamilies in recent phylogenies, it is among the key taxa for understanding the evolution of derived Late Jurassic and Early Cretaceous ichthyosaurs. Recently excavated unique material from the Berriassian of Franz Josef Land (Russian Extreme North) and examination of historical collections in Russian museums provided numerous specimens referable to Arthropterygius. The new data combined with personal examination of ichthyosaurs Palvennia, Janusaurus, and Keilhauia from Svalbard give us reason to refer all these taxa to Arthropterygius. Therefore, we recognize four species within the genus: Arthropterigius chrisorum (Russell, 1994), A. volgensis (Kasansky, 1903) comb. nov., A. hoybergeti (Druckenmiller et al., 2012) comb. nov., and A. lundi (Roberts et al., 2014) comb. nov. Three of the species are found both in the Arctic and in the European Russia. This allows the suggestion that Arthropterygius was common and widespread in the Boreal Realm during the Late Jurassic and earliest Cretaceous. The results of our multivariate analysis of ophthalmosaurid humeral morphology indicate that at least some ophthalmosaurid genera and species, including Arthropterygius, could be easily recognized based solely on humeral morphology. Our phylogenetic analyses place the clade of Arthropterygius close to the base of Ophthalmosauria as a sister group either to ophthalmosaurines or to platypterygiines. Although its position is still uncertain, this is the best supported clade of ophthalmosaurids (Bremer support value of 5, Bootstrap and Jackknife values exceeding 80) that further augments our taxonomic decision. Article in Journal/Newspaper Arctic Franz Josef Land Svalbard Lundi Directory of Open Access Journals: DOAJ Articles Arctic Franz Josef Land ENVELOPE(55.000,55.000,81.000,81.000) Svalbard PeerJ 7 e6799 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Ophthalmosauridae Late Jurassic Arthropterygius Berriassian Ichthyosauria Palaeobiogeography Medicine R Biology (General) QH301-705.5 |
spellingShingle |
Ophthalmosauridae Late Jurassic Arthropterygius Berriassian Ichthyosauria Palaeobiogeography Medicine R Biology (General) QH301-705.5 Nikolay G. Zverkov Natalya E. Prilepskaya A prevalence of Arthropterygius (Ichthyosauria: Ophthalmosauridae) in the Late Jurassic—earliest Cretaceous of the Boreal Realm |
topic_facet |
Ophthalmosauridae Late Jurassic Arthropterygius Berriassian Ichthyosauria Palaeobiogeography Medicine R Biology (General) QH301-705.5 |
description |
The ichthyosaur genus Arthropterygius Maxwell, 2010 is considered as rare and poorly known. However, considering the existing uncertainty regarding its position in respect to ophthalmosaurid subfamilies in recent phylogenies, it is among the key taxa for understanding the evolution of derived Late Jurassic and Early Cretaceous ichthyosaurs. Recently excavated unique material from the Berriassian of Franz Josef Land (Russian Extreme North) and examination of historical collections in Russian museums provided numerous specimens referable to Arthropterygius. The new data combined with personal examination of ichthyosaurs Palvennia, Janusaurus, and Keilhauia from Svalbard give us reason to refer all these taxa to Arthropterygius. Therefore, we recognize four species within the genus: Arthropterigius chrisorum (Russell, 1994), A. volgensis (Kasansky, 1903) comb. nov., A. hoybergeti (Druckenmiller et al., 2012) comb. nov., and A. lundi (Roberts et al., 2014) comb. nov. Three of the species are found both in the Arctic and in the European Russia. This allows the suggestion that Arthropterygius was common and widespread in the Boreal Realm during the Late Jurassic and earliest Cretaceous. The results of our multivariate analysis of ophthalmosaurid humeral morphology indicate that at least some ophthalmosaurid genera and species, including Arthropterygius, could be easily recognized based solely on humeral morphology. Our phylogenetic analyses place the clade of Arthropterygius close to the base of Ophthalmosauria as a sister group either to ophthalmosaurines or to platypterygiines. Although its position is still uncertain, this is the best supported clade of ophthalmosaurids (Bremer support value of 5, Bootstrap and Jackknife values exceeding 80) that further augments our taxonomic decision. |
format |
Article in Journal/Newspaper |
author |
Nikolay G. Zverkov Natalya E. Prilepskaya |
author_facet |
Nikolay G. Zverkov Natalya E. Prilepskaya |
author_sort |
Nikolay G. Zverkov |
title |
A prevalence of Arthropterygius (Ichthyosauria: Ophthalmosauridae) in the Late Jurassic—earliest Cretaceous of the Boreal Realm |
title_short |
A prevalence of Arthropterygius (Ichthyosauria: Ophthalmosauridae) in the Late Jurassic—earliest Cretaceous of the Boreal Realm |
title_full |
A prevalence of Arthropterygius (Ichthyosauria: Ophthalmosauridae) in the Late Jurassic—earliest Cretaceous of the Boreal Realm |
title_fullStr |
A prevalence of Arthropterygius (Ichthyosauria: Ophthalmosauridae) in the Late Jurassic—earliest Cretaceous of the Boreal Realm |
title_full_unstemmed |
A prevalence of Arthropterygius (Ichthyosauria: Ophthalmosauridae) in the Late Jurassic—earliest Cretaceous of the Boreal Realm |
title_sort |
prevalence of arthropterygius (ichthyosauria: ophthalmosauridae) in the late jurassic—earliest cretaceous of the boreal realm |
publisher |
PeerJ Inc. |
publishDate |
2019 |
url |
https://doi.org/10.7717/peerj.6799 https://doaj.org/article/42b537fa51a74dc99850209b2b5a4b5c |
long_lat |
ENVELOPE(55.000,55.000,81.000,81.000) |
geographic |
Arctic Franz Josef Land Svalbard |
geographic_facet |
Arctic Franz Josef Land Svalbard |
genre |
Arctic Franz Josef Land Svalbard Lundi |
genre_facet |
Arctic Franz Josef Land Svalbard Lundi |
op_source |
PeerJ, Vol 7, p e6799 (2019) |
op_relation |
https://peerj.com/articles/6799.pdf https://peerj.com/articles/6799/ https://doaj.org/toc/2167-8359 doi:10.7717/peerj.6799 2167-8359 https://doaj.org/article/42b537fa51a74dc99850209b2b5a4b5c |
op_doi |
https://doi.org/10.7717/peerj.6799 |
container_title |
PeerJ |
container_volume |
7 |
container_start_page |
e6799 |
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