| Taeniolabidoidea Temporal range: 59–55 Ma PreꞒ Ꞓ O S D C P T J K Pg N ↓ Thanetian/Late Paleocene | |
|---|---|
Scientific classification 
| |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Mammalia |
| Order: | †Multituberculata |
| Superfamily: | †Taeniolabidoidea |
| Family: | †Lambdopsalidae Chow and Qi, 1978 |
| Genera | |
Lambdopsalidae is a family of extinct multituberculate mammals from the Late Paleocene of Asia. They are part of Taeniolabidoidea, a clade otherwise present in the Early Paleocene (and possibly the Late Cretaceous) of North America. The Lambdopsalids probably evolved from a single radiation that spread into Asia from North America in the mid-Paleocene or earlier. They are represented by the genera Lambdopsalis, Sphenopsalis and Prionessus. This group was first defined in 1978 by Chow and Tao Qi.
The Lambdopsalids were small mammals, with estimated adult body masses of about 0.4 kilograms (0.88 lb) to 0.8 kilograms (1.8 lb). They are notable for their enlarged teeth that implies adaptations towards leaf grazing, and adaptations for burrowing such as a short and flat snout, robust humeri, stiff neck and enlarged lower incisors. This group has a shared dental formula of 2.0.1.21.0.1.2 Examples of Lambdopsalis are notable for offering direct evidence of hair and enamel and tooth prism patterns among multituberculates.
Lambdopsalids lived during the Thanetian, the last stage of the Paleocene, with fossils ranging from 59-55 million years ago. They disappeared around the PETM.
Notes
- ^ Mao et al 2016, p 433
- ^ Williamson et al 2015
- ^ Mao et al, 2016 pg 433
- Wilson et al 2012, Supplemental table 5
- Kielan-Jorowowska and Qi, 1990
- Kielan-Jorowowska and Hurum, 2001
- Mao et al, 2015
- Wilson et al 2012, Supplemental Tables 3 and 5
References
- Kielan-Jaworowska, Zofia; Hurum, J.H. (2001). "Phylogeny and Systematics of Multituberculate Mammals". Palaeontology. 44 (3): 389–429. doi:10.1111/1475-4983.00185.
- Kielan-Jaworowska, Zofia; Qi, Tao (1990). "Fossorial adaptations of a Taeniolabidoid Multituberculate mammal from the Eocene of China". Vertebrata PalAsiatica. 28 (2): 83–94.
- Mao, Fang-Yuan; Wang, Yuan-Qing; Meng, Jin (2015). "A Systematic Study on Tooth Enamel Microstructures of Lambdopsalis bulla (Multituberculate, Mammalia) - Implications for Multituberculate Biology and Phylogeny". PLOS ONE. 10 (5): e0128243. doi:10.1371/journal.pone.0128243. PMC 4447277. PMID 26020958.
- Mao, Fang-Yuan; Wang, Yang-Qing; Meng, Jin (2016). "New specimens of the multituberculate mammal Sphenopsalis from China: Implications for phylogeny and biology of taeniolabidoids". Acta Palaeontologica Polonica. 61 (2): 429–454. doi:10.4202/app.00117.2014.
- Williamson, Thomas E.; Brusatte, Stephen L.; Secord, Ross; Shelley, Sarah (2015). "A new taeniolabidoid multituberculate (Mammalia) from the middle Puercan of the Nacimiento Formation, New Mexico, and a revision of taeniolabidoid systematics and phylogeny". Zoological Journal of the Linnean Society. 177: 183–208. doi:10.1111/zoj.12336.
- Wilson, Gregory P.; Evans, Alistair R.; Corfe, Ian J.; Smits, Peter D.; Fortelius, Mikael; Jernvall, Jukka (2012). "Adaptive radiation of multituberculate mammals before the extinction of dinosaurs". Nature. 483 (7390): 457–460. doi:10.1038/nature10880. PMID 22419156. S2CID 4419772.
Further reading
- Wood, D. Joseph (2010). The Extinction of the Multituberculates Outside North America: a Global Approach to Testing the Competition Model (M.S.). The Ohio State University.
| Taxon identifiers | |
|---|---|
| Lambdopsalidae | |