Taxonomic status of a small white-toothed shrew (Crocidura sp.) distributed in Guizhou Province

LIU Zhu; ZHANG Lu; GUO Qiuying; ZHANG Zhihui; JIANG Wenjing; TIAN Xinmin; JIN Zhimin; ZHANG Junsheng

doi:10.16829/j.slxb.150936

ACTA THERIOLOGICA SINICA >

2025 , Vol. 45 >Issue 4: 537 - 547

DOI: https://doi.org/10.16829/j.slxb.150936

ORIGINAL PAPERS

Taxonomic status of a small white-toothed shrew (Crocidura sp.) distributed in Guizhou Province

LIU Zhu ,
ZHANG Lu ,
GUO Qiuying ,
ZHANG Zhihui ,
JIANG Wenjing ,
TIAN Xinmin ,
JIN Zhimin ,
ZHANG Junsheng

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College of Life Science and Technology, Mudanjiang Normal University, Mudanjiang 157011, China

Received date: 2024-04-17

Revised date: 2024-12-13

Online published: 2024-12-13

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Abstract

From 2018 to 2023, 25 unidentified specimens of the genus Crocidura were collected from Yejiao Township, Qixingguan District, Bijie City and Munike Village, Yangmei Township, Liupanshui City, Guizhou Province, China. The phylogenetic tree shows the Guizhou specimens clustered in a branch with 100% confidence, based on the mitochondrial Cyt b gene, and were sister to Crocidura wuchihensis GX clade with 90% confidence. The genetic distance between the Guizhou specimens and other species of Crocidura is 0. 070 2 - 0. 181 7. The Guizhou specimens have the smallest genetic distance (0. 070 2) from C. wuchihensis GX. This genetic distance is significantly greater than the genetic distance between C. attenuata and C. anhuiensis (0. 036 5), between C. rapax and C. anhuiensis (0. 037 6), between C. kurodai and C.lasiura (0. 041 0), and between C. rapax and C. attenuata (0. 049 0). There are some morphological differences between the Guizhou specimens and other smaller species of Crocidura, which are known to be possibly distributed in southern China, such as C. shantungensis, C. dongyangjiangensis, C. wuchihensis HN, and C. wuchihensis GX. The morphology of the Guizhou specimens is consistent with that of C. ilensis phaeopus. In view of the obvious distinguishing characteristics in morphology and the molecular results, the Guizhou specimens are treated as a species unit and should be named C. phaeopus. Morphological characteristics of C. phaeopus include small body size (head and body length 48. 1 - 63. 6 mm); long tail (tail length 31. 5 - 46. 9 mm), and small skull (greatest length of skull 15. 68 - 16. 91 mm; condyloincisive length 14. 78 - 15. 84 mm; palatoincisive length 6. 43 - 7. 34 mm; upper toothrow length 6. 21 - 6. 70 mm; lower toothrow length 6. 04 - 6. 69 mm). The dorsum is deep dark brown and the venter is dark gray. The dorsum of the front and back feet is dark brown.

Key words： Crocidura; Cyt b gene; Morphology; Crocidura phaeopus; Cryptic species

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LIU Zhu , ZHANG Lu , GUO Qiuying , ZHANG Zhihui , JIANG Wenjing , TIAN Xinmin , JIN Zhimin , ZHANG Junsheng . Taxonomic status of a small white-toothed shrew (Crocidura sp.) distributed in Guizhou Province[J]. ACTA THERIOLOGICA SINICA, 2025 , 45(4) : 537 -547 . DOI: 10.16829/j.slxb.150936

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