Project 2788: N. G. Zverkov, V. M. Efimov. 2019. Revision of Undorosaurus, a mysterious Late Jurassic ichthyosaur of the Boreal Realm. Journal of Systematic Palaeontology. 17 (14):1183-1213.
Abstract
Recent study of ophthalmosaurid ichthyosaurs has brought us a number of new taxa; however, the validity of several ophthalmosaurid taxa from the Volgian (Tithonian) of European Russia still remains unclear, complicating comparisons and in some cases affecting taxonomic decisions about new contributions. A revision of the type series of all three species of Undorosaurus, erected by Efimov in 1999, reveals the potential validity of two of them. This contradicts previous research, which concluded that only the type species, U. gorodischensis, is valid. Furthermore, examination of the holotype of Cryopterygius kristiansenae from coeval strata of Svalbard shows that it is synonymous with Undorosaurus gorodischensis, sharing all diagnostic features of the species, especially those related to forelimb morphology: humerus with extensive anteroposteriorly elongate proximal end, poorly pronounced trochanter dorsalis and reduced deltopectoral crest; and ulna proximodistally elongate and not involved in perichondral ossification on its whole posterior edge. This supports the idea of intensive exchange of ichthyosaurs between the Middle Russian Sea and other Boreal seas in the Late Jurassic. In order to resolve the phylogenetic position of Undorosaurus within Ophthalmosauridae as well as relationships of other ophthalmosaurids, a new data set including 33 taxa and 106 characters, 23 of which are new, was compiled. The results of this analysis challenge all previous phylogenetic hypotheses for Ophthalmosauridae in a number of aspects, including the fact that Undorosaurus spp. was recovered deeply nested within Platypterygiinae as a sister group to derived platypterygiines.Read the article »
Article DOI: 10.1080/14772019.2018.1515793
Project DOI: 10.7934/P2788, http://dx.doi.org/10.7934/P2788
This project contains | Matrices |
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Download Project SDD File | Total scored cells: 4299 Total media associated with cells: 0 Total labels associated with cell media: 0 |
Characters | |
Total characters: 212 Total characters with associated media: 0 Total characters with media with labels: 0 Total character states: 227 Total character states with associated media: 0 Total character states with media with labels:0 Total unordered/ordered characters:208/4 |
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MorphoBank Project 2788
MorphoBank Project 2788
- Creation Date:
21 November 2017 - Publication Date:
24 January 2019 - Project views: 16381
- Media downloads: 6
- Matrix downloads: 15
Authors' Institutions
- Lomonosov Moscow State University
- Russian Academy of Sciences
- Undory Paleontological Museum
Members
member name | taxa | specimens | media | chars | character
| cell scorings (scored, NPA, "-") | cell
| rules | ||||||
Nikolay Zverkov Project Administrator | 36 | 1 | 1 | 212 | 0 | 0 | 4299 (4299, 0, 0) | 0 | 0 | 0 |
Taxonomic Overview for Matrix 'M25432' (33 Taxa)
taxon | unscored cells |
scored cells |
no cell support |
NPA cells |
"-" cells | cell images | labels on cell images |
member access |
[1] † Temnodontosaurus spp. Last Modified in 01/24/19 | 5 | 101 | 101 | 0 | 0 | 0 | 0 | 1 |
[2] † Ichthyosaurus communis Last Modified in 01/24/19 | 1 | 109 | 105 | 0 | 0 | 0 | 0 | 1 |
[3] † Hauffiopteryx typicus Last Modified in 01/24/19 | 29 | 77 | 77 | 0 | 0 | 0 | 0 | 1 |
[4] † Stenopterygius quadriscissus Last Modified in 01/24/19 | 1 | 108 | 105 | 0 | 0 | 0 | 0 | 1 |
[5] † Chacaicosaurus cayi Last Modified in 01/24/19 | 77 | 29 | 29 | 0 | 0 | 0 | 0 | 1 |
[6] † Stenopterygius aaleniensis Last Modified in 01/24/19 | 47 | 59 | 59 | 0 | 0 | 0 | 0 | 1 |
[7] † Ophthalmosaurus icenicus Last Modified in 01/24/19 | 0 | 108 | 106 | 0 | 0 | 0 | 0 | 1 |
[8] † Ophthalmosaurus natans Last Modified in 01/24/19 | 29 | 77 | 77 | 0 | 0 | 0 | 0 | 1 |
[9] † Mollesaurus periallus Last Modified in 01/24/19 | 74 | 33 | 32 | 0 | 0 | 0 | 0 | 1 |
[10] † Acamptonectes densus Last Modified in 01/24/19 | 48 | 60 | 58 | 0 | 0 | 0 | 0 | 1 |
[11] † Leninia stellans Last Modified in 01/24/19 | 72 | 34 | 34 | 0 | 0 | 0 | 0 | 1 |
[12] † Arthropterygius chrisorum Last Modified in 01/24/19 | 65 | 41 | 41 | 0 | 0 | 0 | 0 | 1 |
[13] † Janusaurus lundi Last Modified in 01/24/19 | 34 | 73 | 72 | 0 | 0 | 0 | 0 | 1 |
[14] † Palvennia hoybergeti Last Modified in 01/24/19 | 34 | 72 | 72 | 0 | 0 | 0 | 0 | 1 |
[15] † Keilhauia nui Last Modified in 01/24/19 | 75 | 31 | 31 | 0 | 0 | 0 | 0 | 1 |
[16] † Grendelius alekseevi Last Modified in 01/24/19 | 38 | 68 | 68 | 0 | 0 | 0 | 0 | 1 |
[17] † Grendelius mordax Last Modified in 01/24/19 | 40 | 67 | 66 | 0 | 0 | 0 | 0 | 1 |
[18] † Caypullisaurus bonapartei Last Modified in 01/24/19 | 48 | 60 | 58 | 0 | 0 | 0 | 0 | 1 |
[19] † Aegirosaurus leptospondylus Last Modified in 01/24/19 | 48 | 59 | 58 | 0 | 0 | 0 | 0 | 1 |
[20] † Undorosaurus gorodischensis Last Modified in 05/11/18 | 10 | 99 | 96 | 0 | 0 | 0 | 0 | 1 |
[21] † Undorosaurus nessovi Last Modified in 05/13/18 | 60 | 46 | 46 | 0 | 0 | 0 | 0 | 1 |
[22] † Nannopterygius enthekiodon Last Modified in 01/24/19 | 79 | 27 | 27 | 0 | 0 | 0 | 0 | 1 |
[23] † Parophthalmosaurus saveljeviensis Last Modified in 01/24/19 | 11 | 97 | 95 | 0 | 0 | 0 | 0 | 1 |
[24] † Gengasaurus nicosiai Last Modified in 01/24/19 | 73 | 33 | 33 | 0 | 0 | 0 | 0 | 1 |
[25] † Athabascasaurus bitumineus Last Modified in 01/24/19 | 59 | 47 | 47 | 0 | 0 | 0 | 0 | 1 |
[26] † Sveltonectes insolitus Last Modified in 01/24/19 | 27 | 80 | 79 | 0 | 0 | 0 | 0 | 1 |
[27] † Plutoniosaurus bedengensis Last Modified in 01/24/19 | 36 | 70 | 70 | 0 | 0 | 0 | 0 | 1 |
[28] † Maiaspondylus lindoei Last Modified in 01/24/19 | 72 | 34 | 34 | 0 | 0 | 0 | 0 | 1 |
[29] † Platypterygius australis Last Modified in 01/24/19 | 4 | 103 | 102 | 0 | 0 | 0 | 0 | 1 |
[30] † Platypterygius hercynicus Last Modified in 01/24/19 | 33 | 74 | 73 | 0 | 0 | 0 | 0 | 1 |
[31] † Platypterygius americanus Last Modified in 01/24/19 | 50 | 56 | 56 | 0 | 0 | 0 | 0 | 1 |
[32] † Platypterygius platydactylus Last Modified in 01/24/19 | 60 | 47 | 46 | 0 | 0 | 0 | 0 | 1 |
[33] † Sisteronia seeleyi Last Modified in 01/24/19 | 75 | 32 | 31 | 0 | 0 | 0 | 0 | 1 |
Taxonomic Overview for Matrix 'M25433' (34 Taxa)
taxon | unscored cells |
scored cells |
no cell support |
NPA cells |
"-" cells | cell images | labels on cell images |
member access |
[1] † Temnodontosaurus spp. Last Modified in 01/24/19 | 5 | 101 | 101 | 0 | 0 | 0 | 0 | 1 |
[2] † Ichthyosaurus communis Last Modified in 01/24/19 | 1 | 109 | 105 | 0 | 0 | 0 | 0 | 1 |
[3] † Hauffiopteryx typicus Last Modified in 01/24/19 | 29 | 77 | 77 | 0 | 0 | 0 | 0 | 1 |
[4] † Stenopterygius quadriscissus Last Modified in 01/24/19 | 1 | 108 | 105 | 0 | 0 | 0 | 0 | 1 |
[5] † Chacaicosaurus cayi Last Modified in 01/24/19 | 77 | 29 | 29 | 0 | 0 | 0 | 0 | 1 |
[6] † Stenopterygius aaleniensis Last Modified in 01/24/19 | 47 | 59 | 59 | 0 | 0 | 0 | 0 | 1 |
[7] † Ophthalmosaurus icenicus Last Modified in 01/24/19 | 0 | 108 | 106 | 0 | 0 | 0 | 0 | 1 |
[8] † Ophthalmosaurus natans Last Modified in 01/24/19 | 29 | 77 | 77 | 0 | 0 | 0 | 0 | 1 |
[9] † Mollesaurus periallus Last Modified in 01/24/19 | 74 | 33 | 32 | 0 | 0 | 0 | 0 | 1 |
[10] † Acamptonectes densus Last Modified in 01/24/19 | 48 | 60 | 58 | 0 | 0 | 0 | 0 | 1 |
[11] † Leninia stellans Last Modified in 01/24/19 | 72 | 34 | 34 | 0 | 0 | 0 | 0 | 1 |
[12] † Arthropterygius chrisorum Last Modified in 01/24/19 | 65 | 41 | 41 | 0 | 0 | 0 | 0 | 1 |
[13] † Janusaurus lundi Last Modified in 01/24/19 | 34 | 73 | 72 | 0 | 0 | 0 | 0 | 1 |
[14] † Palvennia hoybergeti Last Modified in 01/24/19 | 34 | 72 | 72 | 0 | 0 | 0 | 0 | 1 |
[15] † Keilhauia nui Last Modified in 01/24/19 | 75 | 31 | 31 | 0 | 0 | 0 | 0 | 1 |
[16] † Grendelius alekseevi Last Modified in 01/24/19 | 38 | 68 | 68 | 0 | 0 | 0 | 0 | 1 |
[17] † Grendelius mordax Last Modified in 01/24/19 | 40 | 67 | 66 | 0 | 0 | 0 | 0 | 1 |
[18] † Caypullisaurus bonapartei Last Modified in 01/24/19 | 48 | 60 | 58 | 0 | 0 | 0 | 0 | 1 |
[19] † Aegirosaurus leptospondylus Last Modified in 01/24/19 | 48 | 59 | 58 | 0 | 0 | 0 | 0 | 1 |
[20] † Undorosaurus gorodischensis upm Last Modified in 01/24/19 | 25 | 84 | 81 | 0 | 0 | 0 | 0 | 1 |
[21] † Undorosaurus gorodischensis pmo Last Modified in 01/24/19 | 17 | 92 | 89 | 0 | 0 | 0 | 0 | 1 |
[22] † Undorosaurus nessovi Last Modified in 05/13/18 | 60 | 46 | 46 | 0 | 0 | 0 | 0 | 1 |
[23] † Nannopterygius enthekiodon Last Modified in 01/24/19 | 79 | 27 | 27 | 0 | 0 | 0 | 0 | 1 |
[24] † Parophth saveljeviensis Last Modified in 01/24/19 | 11 | 97 | 95 | 0 | 0 | 0 | 0 | 1 |
[25] † Gengasaurus nicosiai Last Modified in 01/24/19 | 73 | 33 | 33 | 0 | 0 | 0 | 0 | 1 |
[26] † Athabascasaurus bitumineus Last Modified in 01/24/19 | 59 | 47 | 47 | 0 | 0 | 0 | 0 | 1 |
[27] † Sveltonectes insolitus Last Modified in 01/24/19 | 27 | 80 | 79 | 0 | 0 | 0 | 0 | 1 |
[28] † Plutoniosaurus bedengensis Last Modified in 01/24/19 | 36 | 70 | 70 | 0 | 0 | 0 | 0 | 1 |
[29] † Maiaspondylus lindoei Last Modified in 01/24/19 | 72 | 34 | 34 | 0 | 0 | 0 | 0 | 1 |
[30] † Platypterygius australis Last Modified in 01/24/19 | 4 | 103 | 102 | 0 | 0 | 0 | 0 | 1 |
[31] † Platypterygius hercynicus Last Modified in 01/24/19 | 33 | 74 | 73 | 0 | 0 | 0 | 0 | 1 |
[32] † Platypterygius americanus Last Modified in 01/24/19 | 50 | 56 | 56 | 0 | 0 | 0 | 0 | 1 |
[33] † Platypterygius platydactylus Last Modified in 01/24/19 | 60 | 47 | 46 | 0 | 0 | 0 | 0 | 1 |
[34] † Sisteronia seeleyi Last Modified in 01/24/19 | 75 | 32 | 31 | 0 | 0 | 0 | 0 | 1 |
Project views
type | number of views | Individual items viewed (where applicable) |
Total project views | 16381 | |
Project overview | 1807 | |
Matrix views | 1104 | Matrix landing page (864 views); Matrix_Zverkov&Efimov_Undorosaurus_revision (134 views); Matrix2_Zverkov&Efimov_Undorosaurus_revision_PMO (106 views); |
Media views | 3111 | Media search (2395 views); M466062 (716 views); |
Views for media list | 868 | |
Specimen list | 1465 | |
Taxon list | 7408 | |
Bibliography | 613 | |
Documents list | 5 |
Project downloads
type | number of downloads | Individual items downloaded (where applicable) |
Total downloads from project | 165 | |
Project downloads | 144 | |
Matrix downloads | 15 | Matrix_Zverkov&Efimov_Undorosaurus_revision (8 downloads); Matrix2_Zverkov&Efimov_Undorosaurus_revision_PMO (7 downloads); |
Media downloads | 6 | M466062 (6 downloads); |