Five specimens of the genus Crocidura were collected from the Moxinjian Provincial Nature Reserve of Chun’an city in Zhejiang Province and from the Dongjiangyuan Provincial Nature Reserve of Dongyang city in August 2017. Phylogenetic reconstruction based on the mitochondrial cytochrome b gene (cyt b) revealed that the unidentified specimens collected from Zhejiang Province forms a distinct clade, which is close to C. lasiura and C. dsinezumi. The genetic distances among them range from 0.101-0.155. Large genetic distances were identified between the unidentified specimens and species from southern China, C. indochinensis and C. wuchihensis, and species from the northeast, C. shantungensis and C. suaveolens. K2P distances among the unidentified species and C. indochinensis, C. wuchihensis, C. shantungensis, C. suaveolens were 0.114, 0.124, 0.139 and 0.144, respectively. The diagnostic characteristics of the unidentified genetic lineage are as follows: body small, head-body 48-61 mm(mean: 55.60 mm), tail length 35-49 mm (mean: 43.14 mm); and the tail is relatively short (72.92%-80.36% of head-body length), almost bare, and long sparse hairs are present only along the basal third to the second of the tail, with a short terminal pencil. Tail is bicolor, black brownish above, and paler beneath. Skull is shorter，Condylo-incisive length 15.60-17.16 mm (mean: 16.46 mm). Results from the combined molecular and morphological analyses indicated that the undefined specimens should be a new species, Crocidura dongyangjiangensis Liu Y, Chen SD, and Liu SY, sp. nov.. Detailed description of this new species is given in the present study.

2017年8月，在浙江省拟建淳安磨心尖省级自然保护区和拟建东阳市东江源省级自然保护区捕获麝鼩属（Crocidura）共5号标本。基于线粒体细胞色素b基因构建的系统发育树显示采集于浙江的麝鼩属样本与大麝鼩（Crocidura lasiura）和日本麝鼩（Crocidura dsinezumi）构成姊妹群，遗传距离最近，而与中国西南部分布的小体型印支小麝鼩（Crocidura indochinensis）、五指山小麝鼩（Crocidura wuchihensis）及东北部分布的山东小麝鼩（Crocidua shantungensis）、北小麝鼩（Crocidua suaveolens）亲缘关系较远，其遗传距离分别为0.114、0.124、0.139和0.144。这些样本与麝鼩属其他物种之间的遗传距离在0.101~0.155之间，最小遗传距离出现在来自浙江的样本和大麝鼩之间，最大遗传距离在浙江样本与中麝鼩之间。形态上，采集于浙江的麝鼩属标本个体小,体长48~61mm（平均：55.60mm），尾长35~49mm（平均：43.14mm）；尾长与体长之比72.92%~80.36%；尾近乎裸露，尾基1/3~1/2着生稀疏长毛；尾上下双色，背部黑褐色，腹部较淡；颅较短，颅全长15.60~17.16mm（平均：16.46mm），与中国东北部分布的山东小麝鼩和北小麝鼩相近又有区别，与已知其它麝鼩属物种形态差异较大；综合形态和系统发育关系证实采集于浙江的麝鼩属物种为一新物种，命名为东阳江麝鼩（Crocidura dongyangjiangensis Liu Y, Chen SD, and Liu SY sp. nov.）。本文对其形态、栖息环境和与近缘种的区别进行了详细记述。