Project 4168: J. J. Calede, Y. T. Tse, K. D. Cairns. 2022. The first evidence of Heosminthus from North America and the phylogenetics of Sminthidae (Mammalia, Rodentia, Dipodoidea): biogeographical implications. Journal of Systematic Palaeontology. 20 (1):null.
Abstract
The Eurasian fossil record is rich with the remains of sminthid rodents, a clade today represented by a single genus, Sicista. In contrast, the North American record of the family is sparse and exclusively composed of species of Plesiosminthus, an animal bearing a grooved incisor, during the Oligocene. This fossil record is the product of dispersal events from Eurasia. We here present the first occurrence of a smooth-incisor sminthid from North America. The new species, Heosminthus teredens from the Arikareean-aged Cabbage Patch beds of Montana, represents a rare occurrence of cranial material showing the clear association between incisors and cheek teeth, and the first postcranial remains for fossil sminthids. Our phylogenetic analysis, expanding on prior work, shows that Heosminthus teredens is most closely related to Heosminthus borrae, from Mongolia. In combination with published radioisotopic dating, our phylogenetic framework of sminthids provides evidence for an additional dispersal of sminthid rodents from Eurasia to North America 30 million years ago via Beringia. Our morphometric analysis of the tibia and metatarsal supports a terrestrial ecology for the new species; it is possible the animal had limited scansorial and/or saltatorial abilities. The large sample size of teeth available for the new taxon enables an analysis of morphological variation and indicates a high degree of polymorphism as well as a large size variation, even when controlling for stratigraphical and geographical range.Read the article »
Article DOI: 10.1080/14772019.2022.2111232
Project DOI: 10.7934/P4168, http://dx.doi.org/10.7934/P4168
This project contains | Matrices |
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Download Project SDD File | Total scored cells: 1956 Total media associated with cells: 0 Total labels associated with cell media: 0 |
Characters | |
Total characters: 46 Total characters with associated media: 0 Total characters with media with labels: 0 Total character states: 117 Total character states with associated media: 0 Total character states with media with labels:0 Total unordered/ordered characters:46/0 |
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MorphoBank Project 4168
MorphoBank Project 4168
- Creation Date:
11 January 2022 - Publication Date:
22 September 2022 - Project views: 4209
- Matrix downloads: 3
Authors' Institutions
- Ohio State University
- University of Washington
- Carnegie Museum of Natural History
Members
member name | taxa | specimens | media | chars | character
| cell scorings (scored, NPA, "-") | cell
| rules | ||||||
Jonathan Calede Project Administrator | 43 | 1 | 0 | 46 | 0 | 0 | 1956 (1956, 0, 0) | 0 | 0 | 0 | ||||
MorphoBank Curator Full membership | 0 | 0 | 3 | 0 | 0 | 0 | 0 (0, 0, 0) | 0 | 0 | 0 |
Taxonomic Overview for Matrix 'M28913' (43 Taxa)
taxon | unscored cells |
scored cells |
no cell support |
NPA cells |
"-" cells | cell images | labels on cell images |
member access |
[1] Allosminthus ernos Last Modified in 08/18/22 | 1 | 49 | 45 | 0 | 0 | 0 | 0 | 2 |
[2] Bohlinosminthus parvulus Last Modified in 08/18/22 | 0 | 52 | 46 | 0 | 0 | 0 | 0 | 2 |
[3] † Heosminthus teredens Last Modified in 08/18/22 | 0 | 50 | 46 | 0 | 0 | 0 | 0 | 2 |
[4] Heosminthus primiveris Last Modified in 08/18/22 | 1 | 48 | 45 | 0 | 0 | 0 | 0 | 2 |
[5] Heosminthus borrae Last Modified in 08/18/22 | 0 | 48 | 46 | 0 | 0 | 0 | 0 | 2 |
[6] Heosminthus nomogenesis Last Modified in 08/18/22 | 4 | 45 | 42 | 0 | 0 | 0 | 0 | 2 |
[7] Heosminthus chimidae Last Modified in 08/18/22 | 0 | 51 | 46 | 0 | 0 | 0 | 0 | 2 |
[8] Heterosminthus firmus Last Modified in 08/18/22 | 1 | 46 | 45 | 0 | 0 | 0 | 0 | 2 |
[9] Heterosminthus erbajevae Last Modified in 08/18/22 | 3 | 47 | 43 | 0 | 0 | 0 | 0 | 2 |
[10] Onjosminthus baindi Last Modified in 08/18/22 | 0 | 49 | 46 | 0 | 0 | 0 | 0 | 2 |
[11] Parasminthus debruijni Last Modified in 08/18/22 | 1 | 49 | 45 | 0 | 0 | 0 | 0 | 2 |
[12] Shamosminthus sodovis Last Modified in 08/18/22 | 2 | 51 | 44 | 0 | 0 | 0 | 0 | 2 |
[13] Sinosminthus inapertus Last Modified in 08/18/22 | 1 | 46 | 45 | 0 | 0 | 0 | 0 | 2 |
[14] Plesiosminthus olzi Last Modified in 08/18/22 | 1 | 50 | 45 | 0 | 0 | 0 | 0 | 2 |
[15] Plesiosminthus clivosus Last Modified in 08/18/22 | 3 | 46 | 43 | 0 | 0 | 0 | 0 | 2 |
[16] Plesiosminthus barsboldi Last Modified in 08/18/22 | 1 | 47 | 45 | 0 | 0 | 0 | 0 | 2 |
[17] Plesiosminthus asiaticus Last Modified in 08/18/22 | 0 | 48 | 46 | 0 | 0 | 0 | 0 | 2 |
[18] Plesiosminthus vegrandis Last Modified in 08/18/22 | 4 | 47 | 42 | 0 | 0 | 0 | 0 | 2 |
[19] Schaubeumys grangeri Last Modified in 08/18/22 | 0 | 48 | 46 | 0 | 0 | 0 | 0 | 2 |
[20] Schaubeumys sabrae Last Modified in 08/18/22 | 5 | 41 | 41 | 0 | 0 | 0 | 0 | 2 |
[21] Plesiosminthus admyarion Last Modified in 08/18/22 | 3 | 48 | 43 | 0 | 0 | 0 | 0 | 2 |
[22] Plesiosminthus meridionalis Last Modified in 08/18/22 | 5 | 43 | 41 | 0 | 0 | 0 | 0 | 2 |
[23] Plesiosminthus schaubi Last Modified in 08/18/22 | 3 | 44 | 43 | 0 | 0 | 0 | 0 | 2 |
[24] Plesiosminthus myarion Last Modified in 08/18/22 | 4 | 43 | 42 | 0 | 0 | 0 | 0 | 2 |
[25] Plesiosminthus winistoerferi Last Modified in 08/18/22 | 1 | 47 | 45 | 0 | 0 | 0 | 0 | 2 |
[26] Plesiosminthus conjunctus Last Modified in 08/18/22 | 3 | 44 | 43 | 0 | 0 | 0 | 0 | 2 |
[27] Plesiosminthus moralesi Last Modified in 08/18/22 | 4 | 46 | 42 | 0 | 0 | 0 | 0 | 2 |
[28] Megasminthus gladiofex Last Modified in 08/18/22 | 3 | 43 | 43 | 0 | 0 | 0 | 0 | 2 |
[29] Megasminthus tiheni Last Modified in 08/18/22 | 3 | 45 | 43 | 0 | 0 | 0 | 0 | 2 |
[30] Macrognathomys gemmacollis Last Modified in 08/18/22 | 8 | 41 | 38 | 0 | 0 | 0 | 0 | 2 |
[31] Macrognathomys bartlett Last Modified in 08/18/22 | 6 | 41 | 40 | 0 | 0 | 0 | 0 | 2 |
[32] Sicista primus Last Modified in 08/18/22 | 1 | 49 | 45 | 0 | 0 | 0 | 0 | 2 |
[33] Sicista gaotege Last Modified in 08/18/22 | 6 | 43 | 40 | 0 | 0 | 0 | 0 | 2 |
[34] Sicista wangi Last Modified in 08/18/22 | 5 | 42 | 41 | 0 | 0 | 0 | 0 | 2 |
[35] Sicista praeloriger Last Modified in 08/18/22 | 6 | 42 | 40 | 0 | 0 | 0 | 0 | 2 |
[36] Sicista bagajevi Last Modified in 08/18/22 | 5 | 41 | 41 | 0 | 0 | 0 | 0 | 2 |
[37] Sicista bilike Last Modified in 08/18/22 | 5 | 43 | 41 | 0 | 0 | 0 | 0 | 2 |
[38] Sicista betulina Last Modified in 08/18/22 | 5 | 43 | 41 | 0 | 0 | 0 | 0 | 2 |
[39] Sicista concolor Last Modified in 08/18/22 | 5 | 42 | 41 | 0 | 0 | 0 | 0 | 2 |
[40] Sicista subtilis Last Modified in 08/18/22 | 5 | 41 | 41 | 0 | 0 | 0 | 0 | 2 |
[41] Litodonomys minimus Last Modified in 08/18/22 | 9 | 38 | 37 | 0 | 0 | 0 | 0 | 2 |
[42] Litodonomys lajeensis Last Modified in 08/18/22 | 2 | 46 | 44 | 0 | 0 | 0 | 0 | 2 |
[43] Omoiosicista fui Last Modified in 08/18/22 | 7 | 43 | 39 | 0 | 0 | 0 | 0 | 2 |
Project views
type | number of views | Individual items viewed (where applicable) |
Total project views | 4209 | |
Project overview | 321 | |
Media views | 1595 | Media search (1204 views); M838635 (1 view); M838604 (1 view); M838605 (1 view); M846891 (130 views); M846892 (129 views); M846893 (129 views); |
Matrix views | 208 | Matrix landing page (188 views); Character Matrix - Sminthidae (20 views); |
Specimen list | 453 | |
Taxon list | 923 | |
Bibliography | 162 | |
Views for media list | 545 | |
Documents list | 2 |
Project downloads
type | number of downloads | Individual items downloaded (where applicable) |
Total downloads from project | 4 | |
Matrix downloads | 3 | Character Matrix - Sminthidae (3 downloads); |
Project downloads | 1 |