Are abnormally large eastern bent-wing bats, Miniopterus Fuliginosus represent feature shift or result of hybridisation?

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Abstract

During a study of morphological variation in bent-wing bats (Miniopterus), we found that specimens originating from the Cao Bang province of Vietnam, identified as M. fuliginosus, were closer in size to the larger species, M. magnater. Mitochondrial gene analysis clearly places these specimens in the former species. At the same time, morphometric analysis of 21 cranial measurements definitely puts these specimens closer to M. magnater and shows their differences from M. fuliginosus samples from different parts of the species range. We assume that in the low mountains of northern Vietnam and southern China, M. fuliginosus, due to as yet unknown circumstances, occupies the niche of a larger species. However insufficient data on nuclear markers also assume a hybrid origin of this population, which borrowed the mtDNA of another species..

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About the authors

S. V. Kruskop

Moscow M.V. Lomonosov State University; Joint Russian-Vietnamese Tropical Scientific Research and Technology Center

Author for correspondence.
Email: selysius@mail.ru

Zoological Museum 

Russian Federation, Moscow; Vietnam, Hanoi

S. S. Zhukova

Moscow M.V. Lomonosov State University

Email: selysius@mail.ru

Biological faculty

Russian Federation, Moscow

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Supplementary files

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2. Fig. 1. Phylogenetic relationships of species of the genus Miniopterus according to analysis of the mitochondrial COI gene; the most representative sample of sequences available for a given gene. Specimens from Cao Bang Province are marked in red.

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3. Fig. 2. Phylogenetic relationships of representatives of the genus Miniopterus according to the concatenate of two mitochondrial genes (COI and cytb). Only original sequences were included in the analysis, with the exception of M. schreibersii from Italy, taken as an outgroup. Specimens from Cao Bang Province are marked in red.

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4. Fig. 3. Distribution of 132 specimens of longwings (Miniopterus fuliginosus and M. magnater) in the space of the first two factors (principal components), calculated for 21 cranial measurements. The first factor is negatively correlated with overall dimensions.

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5. Fig. 4. Distribution of 132 specimens of longwings (Miniopterus fuliginosus and M. magnater) in the space of the first two canonical variables, calculated by discriminant analysis for 21 cranial measurements. Specimens from Nepal (type area of M. fuliginosus) and Southeast Asia are included in the analysis as “uncertain.”

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6. Fig. 5. Comparison of 134 specimens of longwings (Miniopterus fuliginosus and M. magnater) according to the values of two cranial measurements: condylobasal length of the skull (CBL) and width between the outer edges of the canines (C-C). Three specimens from Cao Bang province correspond to the measurements of M. magnater.

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