| Full text | |
| Author(s): |
Total Authors: 2
|
| Affiliation: | [1] Univ Sao Paulo, Lab Mamiferos, Dept Ciencias Biol, Escola Super Agr Luiz de Queiroz, Piracicaba, SP - Brazil
[2] Univ Fed Espirito, Lab Mastozool & Biogeog, Dept Ciencias Biol, Ctr Ciencias Humanas & Nat, Vitoria, Espirto Santo - Spain
[3] Nat Hist Museum, Mammal Sect, Dept Life Sci, London - England
Total Affiliations: 3
|
| Document type: | Journal article |
| Source: | Zootaxa; v. 4550, n. 3, p. 321-339, JAN 25 2019. |
| Web of Science Citations: | 0 |
| Abstract | |
Nectomys (Sigmodontinae, Oryzomyini) is currently composed by five species: Nectomys apicalis, N. magdalenae, N. palmipes, N. rattus, and N squamipes. These rodents have strong morphologic adaptations to semiaquatic habit and inhabit forests along river and streams in almost the entire South American continent. Although Nectomys is not a very speciose genus, 23 nominal taxa are associated with this group. Among these names is Nectomys saturatus, described in 1897 and currently allocated as synonym of N. apicalis, the west-Amazon species of Nectomys. Based on the examination of type material of the genus Nectomys, we hypothesize that Nectomys saturatus is a valid species. To test this hypothesis, we examined morphological and morphometric traits of 570 specimens of genus Nectomys of the same age class, belonging to the five recognized species, including the N saturatus type series. We analyzed the external dimensions through descriptive statistics and we assessed the variation in craniodental measurements by means of Discriminant Analysis. Our results indicate N. saturatus individuals are considerably larger than the samples of congeneric species in all external traits, and they were also discriminated from the other species in the multivariate space. Qualitatively, N. saturatus shows two exclusive traits, the presence of paralophule on M1 and almost parallel-sided interorbital region. In this sense, our set of evidences indicates that our hypothesis should be accepted and the name Nectomys saturatus represents a valid species. (AU) | |
| FAPESP's process: | 12/03381-2 - The genus Nectomys Peters, 1860 (Cricetidae: Sigmodontinae): analysis of specimens from North American institutions |
| Grantee: | Elisandra de Almeida Chiquito |
| Support Opportunities: | Scholarships abroad - Research Internship - Doctorate |
| FAPESP's process: | 09/16009-1 - Systematics, evolution and diversification of the subfamily Sigmodontinae in South America: the tribe Oryzomyini |
| Grantee: | Alexandre Reis Percequillo |
| Support Opportunities: | Research Grants - Young Investigators Grants |
| FAPESP's process: | 16/20055-2 - Systematics and biogeography of the tribe Oryzomyini (Cricetidae: Sigmodontinae) in South America |
| Grantee: | Alexandre Reis Percequillo |
| Support Opportunities: | Scholarships abroad - Research |
| FAPESP's process: | 10/18846-5 - Systematics of the genus Nectomys Peters, 1860 (Cricetidae, Sigmodontinae) |
| Grantee: | Elisandra de Almeida Chiquito |
| Support Opportunities: | Scholarships in Brazil - Doctorate |