Title
An introduction to the systematics of small-bodied Neacomys (Rodentia, Cricetidae) from Peru with descriptions of two new species
Title Variants
Alternative:
Systematics of small-bodied Neacomys
Related Titles
Series:
American Museum novitates, number 3913
By
Sánchez-Vendizú, Pamela
, author
Pacheco, Víctor
, author
Vivas-Ruiz, Dan,
, author
Type
Book
Material
Published material
Publication info
New York, NY American Museum of Natural History [2018]
Notes
Caption title.
"December 10, 2018."
The genus Neacomys includes 10 recognized species of Neotropical spiny mice in the tribe Oryzomyini. Five species have previously been reported from Peru, but the small-bodied Peruvian taxa remain unrevised. In this report, we present the first systematic and taxonomic revision of small-bodied Neacomys populations in Peru and describe two new species based on molecular, morphological, and karyotype data: (1) Neacomys rosalindae, sp. nov., from northeastern Peru, is distinguished from congeneric species by, among other differences, short incisive foramina with a wide maxillary portion of the septum, a small subsquamosal fenestra, and a karyotype of 2n = 48, FN = 50. (2) Neacomys macedoruizi, sp. nov., from central Peru, is distinguished by its gray-based ventral fur, large infraorbital foramen, and karyotype of 2n = 28, FN = 36, with a distinctively large pair of metacentric chromosomes. The results of our molecular analyses suggest that N. minutus (as currently recognized) is a species complex comprised of N. minutus sensu stricto, N. macedoruizi, and a third form that remains to be described. The other species described here, N. rosalindae, is the sister taxon to a cluster that includes the N. minutus complex plus N. musseri. Our data suggest that the upper Amazon River constitutes an important dispersal barrier for species in this genus.
Subjects
Classification
,
Mammals
,
Molecular aspects
,
Neacomys macedoruizi
,
Neacomys rosalindae
,
Oryzomyini
,
Peru
,
Rodents
Call Number
QL1 .A436 no.3913 2018
Language
English
Identifiers
DOI:
https://doi.org/10.1206/3913.1
OCLC:
1078637245
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