Project 3260: J. R. Wible, S. L. Shelley, S. Bi. 2019. New Genus and Species of Djadochtatheriid Multituberculate (Allotheria, Mammalia) from the Upper Cretaceous Bayan Mandahu Formation of Inner Mongolia. Annals of Carnegie Museum. 85 (4):285.
Abstract
The superfamily Djadochtatherioidea is a distinctive clade of multituberculates from Upper Cretaceous beds of Mongolia and Inner Mongolia, China. Because many of the 11 included genera are known from skulls, more is known about the cranial anatomy of djadochtatherioids than any other clade of multituberculates. Within Djadochtatherioidea, the most diverse and widely accepted group is the family Djadochtatheriidae. Within the family, the basal genus, Kryptobaatar Kielan-Jaworowska, 1970, is small with a skull length of about 30 mm, whereas the other four genera, Djadochtatherium Simpson, 1925, Catopsbaatar Kielan-Jaworowska, 1994, Tombaatar Rougier et al., 1997, and Mangasbaatar Rougier et al., 2016, have skulls approximately twice as long. Here, we describe a new genus and species, Guibaatar castellanus, based on a single specimen from the Upper Cretaceous Bayan Mandahu Formation, Inner Mongolia that we refer to Djadochtatheriidae. Guibaatar is represented by a relatively complete rostrum, a partial right braincase, and partial lower jaws. As revealed by CT scanning, the specimen is a juvenile, with deciduous enlarged upper and lower incisors with permanent replacements forming, m2 erupting, and M2 forming. Based on the preserved cranial parts, we estimate the skull length to be approximately 50 mm, but as an adult, Guibaatar would have been in the size range of the larger djadochtatheriids.Phylogenetic analysis including Guibaatar, known djadochtatherioids, and outgroups places Guibaatar within Djadochtatheriidae, as sister to a clade of Mangasbaatar and Catopsbaatar. We suspect the relationships of djadochtatherioids are likely to be refined given the announcements by other researchers that skulls are known for the djadochtatheriids Tombaatar and Djadochtatherium, which were previously represented by incomplete material.Read the article »
Article DOI: 10.2992/007.085.0401
Project DOI: 10.7934/P3260, http://dx.doi.org/10.7934/P3260
This project contains | Matrices |
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Download Project SDD File | Total scored cells: 1373 Total media associated with cells: 0 Total labels associated with cell media: 0 |
Characters | |
Total characters: 74 Total characters with associated media: 0 Total characters with media with labels: 0 Total character states: 198 Total character states with associated media: 0 Total character states with media with labels:0 Total unordered/ordered characters:72/2 |
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MorphoBank Project 3260
MorphoBank Project 3260
- Creation Date:
10 September 2018 - Publication Date:
16 January 2020 - Project views: 13604
- Media downloads: 1
- Matrix downloads: 11
This research
supported by
Authors' Institutions
- Yunnan University
- Carnegie Museum of Natural History
- Indiana University of Pennsylvania
Members
member name | taxa | specimens | media | chars | character
| cell scorings (scored, NPA, "-") | cell
| rules | ||||||
John Wible Project Administrator | 18 | 1 | 1 | 74 | 0 | 0 | 1373 (970, 358, 45) | 0 | 0 | 0 | ||||
Shundong Bi Full membership | 0 | 0 | 0 | 0 | 0 | 0 | 0 (0, 0, 0) | 0 | 0 | 0 | ||||
Sarah Shelley Full membership | 0 | 0 | 0 | 0 | 0 | 0 | 0 (0, 0, 0) | 0 | 0 | 0 |
Taxonomic Overview for Matrix 'M25603' (18 Taxa)
taxon | unscored cells |
scored cells |
no cell support |
NPA cells |
"-" cells | cell images | labels on cell images |
member access |
[1] † Ptilodus Last Modified in 01/16/20 | 0 | 71 | 71 | 2 | 1 | 0 | 0 | 3 |
[2] † Stygimys Last Modified in 01/16/20 | 0 | 49 | 46 | 28 | 0 | 0 | 0 | 3 |
[3] † Taeniolabis Last Modified in 01/16/20 | 0 | 53 | 51 | 9 | 14 | 0 | 0 | 3 |
[4] † Eucosmodon Last Modified in 01/16/20 | 0 | 25 | 25 | 47 | 2 | 0 | 0 | 3 |
[5] † Lambdopsalis Last Modified in 01/16/20 | 0 | 64 | 57 | 2 | 14 | 0 | 0 | 3 |
[6] † Sloanbaatar Last Modified in 01/16/20 | 0 | 60 | 57 | 13 | 1 | 0 | 0 | 3 |
[7] † Buginbaatar Last Modified in 01/16/20 | 0 | 26 | 25 | 48 | 0 | 0 | 0 | 3 |
[8] † Nessovbaatar Last Modified in 01/16/20 | 0 | 14 | 14 | 60 | 0 | 0 | 0 | 3 |
[9] † Bulganbaatar Last Modified in 01/16/20 | 0 | 33 | 33 | 40 | 1 | 0 | 0 | 3 |
[10] † Kamptobaatar Last Modified in 01/16/20 | 0 | 69 | 66 | 6 | 1 | 0 | 0 | 3 |
[11] † Nemegtbaatar Last Modified in 01/16/20 | 0 | 77 | 70 | 3 | 0 | 0 | 0 | 3 |
[12] † Chulsanbaatar Last Modified in 01/16/20 | 0 | 75 | 70 | 3 | 1 | 0 | 0 | 3 |
[13] † Kryptobaatar Last Modified in 01/16/20 | 0 | 77 | 72 | 0 | 1 | 0 | 0 | 3 |
[14] † Djadochtatherium Last Modified in 01/16/20 | 0 | 36 | 36 | 38 | 0 | 0 | 0 | 3 |
[15] † Catopsbaatar Last Modified in 01/16/20 | 0 | 75 | 59 | 7 | 3 | 0 | 0 | 3 |
[16] † Tombaatar Last Modified in 01/16/20 | 0 | 38 | 37 | 34 | 2 | 0 | 0 | 3 |
[17] † Mangasbaatar Last Modified in 01/16/20 | 0 | 68 | 62 | 4 | 2 | 0 | 0 | 3 |
[18] † Guibaatar Last Modified in 01/16/20 | 0 | 60 | 53 | 14 | 2 | 0 | 0 | 3 |
Project views
type | number of views | Individual items viewed (where applicable) |
Total project views | 13604 | |
Project overview | 1171 | |
Matrix views | 951 | Matrix landing page (819 views); File output by Morphobank v3.0 (http://www.morphobank.org); 2018-09-10 13.46.32 (132 views); |
Media views | 2588 | Media search (2211 views); M683413 (377 views); |
Specimen list | 1384 | |
Taxon list | 5343 | |
Views for media list | 824 | |
Bibliography | 1337 | |
Documents list | 6 |
Project downloads
type | number of downloads | Individual items downloaded (where applicable) |
Total downloads from project | 157 | |
Project downloads | 145 | |
Media downloads | 1 | M683413 (1 download); |
Matrix downloads | 11 | File output by Morphobank v3.0 (http://www.morphobank.org); 2018-09-10 13.46.32 (11 downloads); |