Vol. 53, 2014
An enigmatic pygmy dormouse: molecular and morphological
evidence for the species taxonomic status of Typhlomys chapensis (Rodentia:
V Abramov1,3*, Alexander E Balakirev2,3 and Viatcheslav V
Institute, Russian Academy of Sciences, Universitetskaya nab. 1, Saint
Petersburg 199034, Russia
2A.N. Severtsov Institute of Ecology and Evolution,
Russian Academy of Sciences, Leninskii pr. 33, Moscow 119071, Russia
3Joint Vietnam-Russian Tropical Research and
Technological Centre, Nguyen Van Huyen, Nghia Do, Cau Giay, Hanoi,
Background: The taxonomic position
of enigmatic pygmy dormouse Typhlomys
(Rodentia: Platacanthomyidae) from Vietnam is reconsidered based on
both morphology and sequence data.
analysis of mitochondrial and nuclear genes has shown that the pygmy
dormouse from Lao Cai Province of northern Vietnam belongs to a
distinct phylogenetic lineage of Typhlomys.
The DNA analysis has demonstrated a strong genetic difference (0.245 to
0.252 for the cytochrome oxidase gene (COI), 0.079 to 0.082 for
interphotoreceptor retinoid-binding protein gene (IRBP), and 0.028 for
the growth hormone receptor gene (GHR) between this lineage and the
sample from South China. Multivariate analysis of cranial and dental
data, as well as of some external characters, has also separated the
Vietnamese population from the pygmy dormouse from Fujianin southern
China, the type locality of Typhlomys
cinereus (Bull Soc
Philomath Paris 12:8–10, 1877).
Conclusions: Both genetic and
morphological data confirm that there is a second species, Typhlomys chapensis (Field Mus Nat Hist Zool
Ser 18:193–339, 1932), in the heretofore monotypic genus Typhlomys.
Key words: Mitochondrial DNA; Nuclear DNA;
Morphology; Systematics; Typhlomys chapensis.
*Correspondence: E-mail: firstname.lastname@example.org