Project 3544: J. Jia, K. Gao. 2019. A new stem hynobiid salamander (Urodela, Cryptobranchoidea) from the Upper Jurassic (Oxfordian) of Liaoning Province, China. Journal of Vertebrate Paleontology. 39 (2):e1588285.
Abstract
Hynobiids are a group of small- to moderate-sized salamanders living primarily in Asia. They are a primitive crown-group clade, with a poor fossil record. Several hynobiid-like taxa have been discovered from the Lower Cretaceous strata of northern China during the last 20 years, with Liaoxitriton zhongjiani and Nuominerpeton aquilonaris identified as the oldest known stem hynobiids. However, the record of pre-Cretaceous hynobiid-like taxa is only known by Liaoxitriton daohugouensis, of which both the morphology and the congeneric status with L. zhongjiani remain problematic. Here, we report on a new hynobiid-like salamander, Linglongtriton daxishanensis, gen. et sp. nov., on the basis of two specimens from the Upper Jurassic Lanqi/Tiaojishan Formation (∼160 Ma) of Liaoning Province, China. Linglongtriton is diagnosed by a unique combination of features revealed by both observation under microscope and micro-computed tomography (μCT) scan of the holotype, including nasals separated from each other at the midline; prootic, opisthotic, and exoccipital retained as discrete elements; dentary with a lateral groove; articular not ossified; metacarpal III enlarged; a single centrale; and distal tarsals 4 and 5 fused into a single element. Phylogenetic analysis identified Linglongtriton and several other hynobiid-like taxa, including Liaoxitriton daohugouensis, as stem hynobiids, thereby extending the temporal range of the stem by at least 40 Ma—from the Early Cretaceous (Aptian–Barremian) to the Middle Jurassic (Bathonian). Comparative study of Linglongtriton with living and fossil hynobiids sheds new lights on the evolution and developmental mechanisms of several characters, including nasal separation and tarsal elements.Read the article »
Article DOI: 10.1080/02724634.2019.1588285
Project DOI: 10.7934/P3544, http://dx.doi.org/10.7934/P3544
This project contains | Matrices |
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Download Project SDD File | Total scored cells: 3038 Total media associated with cells: 0 Total labels associated with cell media: 0 |
Characters | |
Total characters: 120 Total characters with associated media: 0 Total characters with media with labels: 0 Total character states: 262 Total character states with associated media: 0 Total character states with media with labels:0 Total unordered/ordered characters:120/0 |
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MorphoBank Project 3544
MorphoBank Project 3544
- Creation Date:
02 October 2019 - Publication Date:
18 October 2019 - Project views: 18535
- Media downloads: 1
- Matrix downloads: 5
Authors' Institutions
- Beijing University (Peking University)
- Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences
- Shandong University of Science and Technology
Members
member name | taxa | specimens | media | chars | character
| cell scorings (scored, NPA, "-") | cell
| rules | ||||||
MorphoBank Curator Project Administrator | 34 | 0 | 4 | 120 | 0 | 0 | 3038 (3038, 0, 0) | 0 | 0 | 0 | ||||
Jia Jia Full membership | 0 | 2 | 0 | 0 | 0 | 0 | 0 (0, 0, 0) | 0 | 0 | 0 |
Taxonomic Overview for Matrix 'M26266' (34 Taxa)
taxon | unscored cells |
scored cells |
no cell support |
NPA cells |
"-" cells | cell images | labels on cell images |
member access |
[1] † Karaurus Last Modified in 10/03/19 | 53 | 67 | 67 | 0 | 0 | 0 | 0 | 2 |
[2] Cryptobranchus Last Modified in 10/03/19 | 5 | 118 | 115 | 0 | 0 | 0 | 0 | 2 |
[3] Andrias Last Modified in 10/03/19 | 6 | 115 | 114 | 0 | 0 | 0 | 0 | 2 |
[4] Hynobius Last Modified in 10/03/19 | 6 | 126 | 114 | 0 | 0 | 0 | 0 | 2 |
[5] Onychodactylus Last Modified in 10/03/19 | 6 | 116 | 114 | 0 | 0 | 0 | 0 | 2 |
[6] Plethodon Last Modified in 10/03/19 | 13 | 109 | 107 | 0 | 0 | 0 | 0 | 2 |
[7] Desmognathus Last Modified in 10/03/19 | 17 | 104 | 103 | 0 | 0 | 0 | 0 | 2 |
[8] Amphiuma Last Modified in 10/03/19 | 9 | 114 | 111 | 0 | 0 | 0 | 0 | 2 |
[9] † Proamphiuma Last Modified in 10/18/19 | 111 | 9 | 9 | 0 | 0 | 0 | 0 | 2 |
[10] Rhyacotriton Last Modified in 10/03/19 | 4 | 117 | 116 | 0 | 0 | 0 | 0 | 2 |
[11] Siren Last Modified in 10/03/19 | 13 | 108 | 107 | 0 | 0 | 0 | 0 | 2 |
[12] Pseudobranchus Last Modified in 10/03/19 | 17 | 103 | 103 | 0 | 0 | 0 | 0 | 2 |
[13] † Habrosaurus Last Modified in 10/18/19 | 100 | 20 | 20 | 0 | 0 | 0 | 0 | 2 |
[14] Necturus Last Modified in 10/03/19 | 19 | 101 | 101 | 0 | 0 | 0 | 0 | 2 |
[15] Proteus Last Modified in 10/03/19 | 20 | 100 | 100 | 0 | 0 | 0 | 0 | 2 |
[16] Salamandra Last Modified in 10/03/19 | 6 | 117 | 114 | 0 | 0 | 0 | 0 | 2 |
[17] Taricha Last Modified in 10/03/19 | 7 | 113 | 113 | 0 | 0 | 0 | 0 | 2 |
[18] Tylototriton Last Modified in 10/03/19 | 11 | 110 | 109 | 0 | 0 | 0 | 0 | 2 |
[19] Dicamptodon Last Modified in 10/03/19 | 4 | 122 | 116 | 0 | 0 | 0 | 0 | 2 |
[20] Ambystoma Last Modified in 10/03/19 | 5 | 118 | 115 | 0 | 0 | 0 | 0 | 2 |
[21] † Valdotriton Last Modified in 10/18/19 | 54 | 66 | 66 | 0 | 0 | 0 | 0 | 2 |
[22] † Jeholotriton Last Modified in 10/18/19 | 73 | 47 | 47 | 0 | 0 | 0 | 0 | 2 |
[23] † Liaoxitriton zhongjiani Last Modified in 10/18/19 | 49 | 71 | 71 | 0 | 0 | 0 | 0 | 2 |
[24] † Pangerpeton Last Modified in 10/18/19 | 53 | 67 | 67 | 0 | 0 | 0 | 0 | 2 |
[25] † Chunerpeton Last Modified in 10/18/19 | 53 | 67 | 67 | 0 | 0 | 0 | 0 | 2 |
[26] † Beiyanerpeton Last Modified in 10/18/19 | 42 | 78 | 78 | 0 | 0 | 0 | 0 | 2 |
[27] † Iridotriton Last Modified in 10/18/19 | 97 | 23 | 23 | 0 | 0 | 0 | 0 | 2 |
[28] † Qinglongtriton Last Modified in 10/18/19 | 36 | 84 | 84 | 0 | 0 | 0 | 0 | 2 |
[29] † Linglongtriton Last Modified in 10/18/19 | 32 | 88 | 88 | 0 | 0 | 0 | 0 | 2 |
[30] Liua Last Modified in 10/03/19 | 7 | 115 | 113 | 0 | 0 | 0 | 0 | 2 |
[31] Pseudohynobius Last Modified in 10/03/19 | 7 | 115 | 113 | 0 | 0 | 0 | 0 | 2 |
[32] † Nuominerpeton Last Modified in 10/18/19 | 31 | 89 | 89 | 0 | 0 | 0 | 0 | 2 |
[33] † Regalerpeton Last Modified in 10/18/19 | 44 | 77 | 76 | 0 | 0 | 0 | 0 | 2 |
[34] † Liaoxitriton daohugouensis Last Modified in 10/03/19 | 76 | 44 | 44 | 0 | 0 | 0 | 0 | 2 |
Project views
type | number of views | Individual items viewed (where applicable) |
Total project views | 18535 | |
Project overview | 1193 | |
Media views | 4061 | Media search (2304 views); M681534 (410 views); M681535 (407 views); M681536 (434 views); M681537 (506 views); |
Matrix views | 816 | Matrix landing page (714 views); Linglongtriton 34 taxa 120 character matrix (102 views); |
Documents list | 674 | |
Views for media list | 1377 | |
Specimen list | 1711 | |
Taxon list | 7334 | |
Bibliography | 1369 |
Project downloads
type | number of downloads | Individual items downloaded (where applicable) |
Total downloads from project | 151 | |
Matrix downloads | 5 | Linglongtriton 34 taxa 120 character matrix (5 downloads); |
Project downloads | 144 | |
Document downloads | 1 | Data matrix in NEXUS format, no character labels (1 download); |
Media downloads | 1 | M681536 (1 download); |