Systematics of bats of genus Murina in Taiwan (Chiroptera: Vespertilionidae)
Date Issued
2004
Date
2004
Author(s)
Kuo, Hao-Chih
DOI
zh-TW
Abstract
Chapter 1: Taxonomy of bats of genus Murina in Taiwan
We examined variations in the morphological characters of 74 specimens of the genus Murina (including subgenera Murina and Harpiola) and concluded that four species occur in Taiwan. They are Murina puta and three new record species. We further compared each of these four species with similar species of genus Murina and concluded that M. puta is currently treated as a valid species, although it is morphologically very similar to Murina huttoni. The three new record species include a new species, Murina gracilis, and two new subspecies, Murina grisea isodon and Murina leucogaster bicolor. M. grisea was the only known species of subgenus Harpiola. Based on the unique dental characters of M. grisea, which are distinctively different from those of other Murina species, we suggested that Harpiola should be treated as a valid genus. Hence Murina grisea shoud be named as Harpiola grisea. Keys of the five species of subfamily Murininae in Taiwan, including the four species listed above and Harpiocephalus harpia, based on their morphological characters, were provided.
Chapter 2: The phylogenetic study of bats of subfamily Murininae
We constructed phylogenetic trees of five species of subfamily Murininae in Taiwan based on sequences of their cytochrome b and ND1 mitochondrial genes. Samples of each of these five species formed highly supported monophyletic groups and had long genetic distance between them. Furthermore, samples of Murina gracilis showed greater genetic variation than the other four species and could be divided into three well-supported groups in the phylogenetic trees, namely Type I group in eastern Taiwan, Type I group in western Taiwan and Type II group. Diagnosable differences in morphology between specimens of Type I and Type II groups implied that their divergence might be at specific level. Using the same two genes, we also examined the phylogeny of Murininae after adding more taxa than previous studies. The results indicated that taxa of Murininae form a monophyletic group. Within the subfamily, however, genetic distances between most species were similar and the support for the phylogenetic relationships among them was weak, which indicated that these species have experienced a period of rapid diversification in the past. We suggested that genera Murina, Harpiola and Harpiocephalus should be grouped into one genus, Murina, based on the similar level of divergence among species within the genus. Furthermore, the traditional subdivision of the genus Murina into two species groups, Species Group I and Species Group II, has no corresponding groupings in their phylogeny.
Subjects
管鼻蝠亞科
系統分類學
管鼻蝠屬
系群演化
Murininae
Murina
systematics
phylogeny
Type
other
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