| Microtitan | |
|---|---|
Scientific classification 
| |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Mammalia |
| Infraclass: | Placentalia |
| Order: | Perissodactyla |
| Family: | †Brontotheriidae |
| Genus: | †Microtitan |
| Species: | †M. mongoliensis
|
| Binomial name | |
| †Microtitan mongoliensis Granger and Gregory, 1943
| |
Microtitan is a genus of brontothere from the Irdin Manha formation.3
Description
Microtitan is small compared to other contemporary brontotheres, being similar in size to Metarhinus. The premolars of Microtitan are compressed, while the molars are elongated.4 The genus is almost entirely known from the cheek teeth, as well as mandibular and maxillary remains.56 There is no indication of the specialization of the rostrum as seen in Dolichorhinus or Metarhinus. The upper canines of Microtitan are moderately sized.1
Classification
The fragmentary nature of Microtitan has caused it to have a convoluted classification history. The holotype specimen of the genus, AMNH 20167, (ascribed to the species M. mongoliensis) has been considered a composite specimen (meaning material came from multiple individuals) and not fitting to be a diagnostic specimen. A neotype, AMNH 22099, is currently ascribed to the species by Granger and Gregory (1943).41 Other species assigned to the genus have been considered dubious.15
Currently the genus is grouped within the subfamily Brontotheriinae, close to Metarhinus.1
References
References
- Mihlbachler, Matthew C. "Species Taxonomy, Phylogeny, and Biogeography of the Brontotheriidae (Mammalia: Perissodactyla)". Bulletin of the American Museum of Natural History. doi:10.1206/0003-0090(2008)501[1:STPABO]2.0.CO;2.full.
- Bai, Bin; Meng, Jin; Janis, Christine M.; Zhang, Zhao‐Qun; Wang, Yuan‐Qing (2020). "Perissodactyl diversities and responses to climate changes as reflected by dental homogeneity during the Cenozoic in Asia". Ecology and Evolution. 10 (13): 6333–6355. doi:10.1002/ece3.6363. ISSN 2045-7758. PMC 7381588. PMID 32724516.
- "Mindat.org". www.mindat.org. Retrieved 2025-12-17.
- Granger, Walter; Gregory, William K. "A revision of the Mongolian titanotheres. Bulletin of the AMNH ; v. 80, article 10". Biodiversity Heritage Library. Retrieved 2025-12-17.
- Bai, Bin; Wang, Yuan-Qing; Li, Qian; Wang, Hai-Bing; Mao, Fang-Yuan; Gong, Yan-Xin; Meng, Jin. "Biostratigraphy and Diversity of Paleogene Perissodactyls from the Erlian Basin of Inner Mongolia, China". American Museum Novitates. doi:10.1206/3914.1.full.
- Mihlbachler, Matthew C.; Lucas, Spencer G.; Emry, Robert J.; Bayshashov, Bolat. "A New Brontothere (Brontotheriidae, Perissodactyla, Mammalia) from the Eocene of the Ily Basin of Kazakstan and a Phylogeny of Asian "Horned" Brontotheres". American Museum Novitates. doi:10.1206/0003-0082(2004)439%3C0001:ANBBPM%3E2.0.CO;2.full.