| 周圣博,关萍,史静耸.2023.东秦岭地区齿突蟾属一新种记述（两栖纲：角蟾科）.动物学杂志,58(5):641-650. |
| 东秦岭地区齿突蟾属一新种记述（两栖纲：角蟾科） |
| A New Species of the Genus Scutiger from Eastern Qinling Mountains (Anura:Megophryidae) |
| 投稿时间：2023-05-10 |
| DOI：10.13859/j.cjz.202305001 |
| 中文关键词: 华夏齿突蟾 系统学 分类学 物种多样性 |
| 英文关键词:Scutiger feiliangisp. nov. Systematics Taxonomy Species diversity |
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| 中文摘要: |
| 2020年5月在洛阳市嵩县白云山国家森林公园玉皇顶林场(33°38′37″ N，111°50′01″ E，海拔1 882 m)采集到齿突蟾属(Scutiger)物种9号标本，经形态特征比较及线粒体COI和Cyt b基因联合构建的齿突蟾属部分物种系统发育树显示，采集到的齿突蟾标本系一新种，命名为华夏齿突蟾Scutiger feiliangi Zhou, Guan and Shi, sp. nov.。其主要鉴别特征为：1)体型中等，雄性体长45.7 ~ 50.2 mm，雌性体长48.9 ~ 51.5 mm；2)头宽略大于头长，鼓膜不显；3)前臂及手长略超过体长之半，后肢较短；4)背面粗糙，布满疣粒；5)指间无蹼，趾间微蹼；6)具两对胸腺，外侧者略小于内侧；7)背部有4行断续排列的纵行肤褶；8)肛周有多个近圆形腺体。同时，对新种华夏齿突蟾的生物学特性进行描述。 |
| 英文摘要: |
| [Objectives] In May 2020, 9 specimens of the genus Scutiger were collected from the Yuhuangding Forest Centre in Baiyun Mountain National Forest Park, Song County, Luoyang City, China. These specimens differ significantly from other species of the Scutiger genus in terms of morphological characteristics. Morphological and molecular biology studies confirmed that the specimens collected from Baiyun Mountain as a new species. [Methods] Detailed morphological characteristics of the 9 collected specimens were measured and compared with related species of the genus Scutiger. Maximum likelihood tree and Bayesian tree were jointly constructed based on mitochondrial COI and Cyt b genes. The Kimura two-parameter model of MEGA7.0 was used to calculate the genetic distance between some species of the genus Scutiger based on COI gene fragments. [Results] The species distinguished from the congeners by a combination of the following characteristics (Table 1):1) moderate body size, snout-vent length 45.7﹣50.2 mm in males, and 48.9﹣51.5 mm in females; 2) head width slightly larger than head length, tympanum indistinct; 3) The length of lower arm and hand are slightly more than half the length of the body size, hindlimb relatively short; 4) dorsal surface rough, with warts; 5) no web between fingers, rudimentary web between toes; 6) two pairs of pectoral glands, lateral slightly smaller than medial; 7) back has 4 lines of intermittent longitudinal skin folds; 8) multiple nearly round glands around the anus. The phylogenetic tree showed that the Baiyun Mountain population was a monophyletic population with high support rates (Fig. 1, BP/PP = 95/1.00). The genetic distance between the Baiyun Mountain population and the S. ningshanensis is 3.6% to 5.1%, which was greater than the minimum genetic distance between species within the genus (S. boulengeri and S. mammatus, 2.1%). The genetic distance between the Baiyun Mountain population and other species within the genus was greater than 10% (Appendix 1). [Conclusion] Morphological features and phylogenetic analysis supported the collection of odontoid toad specimens from Baiyun Mountain in Luoyang as a new species named Scutiger feiliangi Zhou, Guan and Shi, sp. nov..S. feiliangi is the species with the eastmost distribution range in the genus Scutiger. Similar to S. ningshanensis and S. chintingensis, it has a narrow distribution area and a small population. It is recommended that the S. feiliangi be evaluated as Vulnerable (VU) on the IUCN Red List of Threatened Species and that its systematic and comprehensive protection be strengthened. |
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