Limnopithecus
| Limnopithecus Temporal range: | |
|---|---|
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Mammalia |
| Order: | Primates |
| Superfamily: | Hominoidea |
| Family: | †Dendropithecidae |
| Genus: | †Limnopithecus Hopwood, 1933 |
| Type species | |
| †Limnopithecus legetet | |
| Species | |
| |
Limnopithecus is an extinct genus of small-bodied catarrhine primates from the Early Miocene of East Africa. Fossils attributed to the genus are known from several early Miocene sites in Kenya and Uganda, including Koru, Legetet, Chamtwara, Rusinga, Songhor, Napak, and Bukwo.[1][2]
Description
[edit]Limnopithecus was a small-bodied catarrhine. Much of the known anatomy of the genus is based on dental and maxillary remains, and its anatomical and systematic relationships have been the subject of taxonomic studies.[2]
Two well-preserved maxillary specimens attributed to L. evansi from Songhor in western Kenya preserve the entire upper dentition on one side and provide additional information about the maxilla, palate, nasal aperture, and maxillary sinuses.[2]
A particularly distinctive feature of Limnopithecus is the morphology of the upper second incisor (I²). Specimens attributed to the genus from Songhor, Koru, and Rusinga share a morphology that has not been reported in any other known early Miocene catarrhine. Cote et al. interpreted this similarity as evidence supporting the placement of L. evansi and L. legetet in the same genus.[2]
The upper dentition of L. evansi also exhibits a broad palate and distinctive premolar morphology and proportions. These features distinguish it from Lomorupithecus harrisoni, another small-bodied catarrhine from Napak, Uganda, and were used by Cote et al. to argue against treating the two taxa as conspecific.[2]
Species
[edit]Limnopithecus legetet
[edit]†Limnopithecus legetet is the type species of the genus and was described by Arthur Tindell Hopwood in 1933 from material discovered at Koru, Kenya.[2][1]
The holotype is a partial adult mandible preserving two teeth, while the paratype is a fragmentary juvenile mandible. Additional material has subsequently been referred to the species from localities including Koru, Legetet, Chamtwara, Rusinga, and Williams Flat in Kenya, as well as Napak and Bukwa in Uganda.[2]
The species has been included in several taxonomic revisions of the small catarrhines of the East African Early Miocene. However, the composition of the hypodigm attributed to L. legetet remains subject to discussion, particularly concerning specimens originally referred to the species after the description of its type material.[1][3]
Limnopithecus evansi
[edit]†Limnopithecus evansi was described by MacInnes in 1943 from material from Songhor, western Kenya.[2]
The species was later synonymized with L. legetet by Andrews (1978), but Harrison (1988) resurrected it as a valid species based primarily on material from Songhor.[1]
L. evansi is known particularly well from maxillary material collected at Songhor, including two well-preserved specimens examined by Cote et al. These specimens provided new information on the upper dentition and maxillary anatomy of the species.[2]
Cote et al. found that L. evansi shares the distinctive upper second incisor morphology present in specimens attributed to L. legetet, supporting their placement in the same genus. They also identified differences in palate and premolar morphology separating L. evansi from Lomorupithecus harrisoni.[2]
References
[edit]- 1 2 3 4 Harrison, Terry (1988). "A Taxonomic Revision of the Small Catarrhine Primates from the Early Miocene of East Africa". Folia Primatologica. 50 (1–2): 59–108. doi:10.1159/000156334. PMID 3234984.
- 1 2 3 4 5 6 7 8 9 10 Cote, Susanne; McNulty, Kieran P.; Stevens, Nancy J.; Nengo, Isaiah Odhiambo (2016). "A detailed assessment of the maxillary morphology of Limnopithecus evansi with implications for the taxonomy of the genus". Journal of Human Evolution. 94: 83–91. doi:10.1016/j.jhevol.2016.01.004. PMID 27178460.
- ↑ Jansma, Rutger J. W.; Locke, Ellis M. (2026). "A reassessment of Xenopithecus koruensis from the Early Miocene of Koru, Kenya". Historical Biology. 38 (10): 4320–4339. doi:10.1080/08912963.2026.2633183.