We describe the first case of dicephalism in a caecilian larva, Ichthyophis bannanicus, from southeastern Guangxi, China. The two heads of the larva are united at the anterior one-third of the body. It is measured as...We describe the first case of dicephalism in a caecilian larva, Ichthyophis bannanicus, from southeastern Guangxi, China. The two heads of the larva are united at the anterior one-third of the body. It is measured as： body mass 0.6 g, total length 42.4 mm, body width at middle 5.4 ram, head length 2.1 mm, head width 2.5 mm, snout length 1.5 mm, internarial distance 0.9 mm, and interorbital distance 1.7 ram. Compared to normal conspecific larvae, it is smaller except for the internarial distance, body mass and body width at midbody.展开更多
A new unstriped Ichthyophis is found in Yunnan, China, it is distinguished from its unstriped congeners in morphology by a combination of characters including HL(head length), the number of annuli(369–372), vertebrae...A new unstriped Ichthyophis is found in Yunnan, China, it is distinguished from its unstriped congeners in morphology by a combination of characters including HL(head length), the number of annuli(369–372), vertebrae(114), inner mandibular teeth(36) and premaxillary-maxillary(51). The new species is also distinguished from its closest neighbour congener by a significant genetic divergence which is greater than 5.8% in the mitochondrial COI gene and greater than 6.3% in the mitochondrial cyt-b gene. As the first unstriped Ichthyophis species found in China,it is also the second species of Caecilians(Amphibian:Gymnophiona) found in China.展开更多
基金supported by the Natural Science Foundation of Guangxi,China(No.2011GXNSFA018107)the Key Laboratory of Ecology of Rare and Endangered Species and Environmental rotection of Guangxi Normal University and Ministry of Education of China(No.1002K004)the Technology Innovation Capability Construction Program of Yulin City,Guangxi,China(No.11043002)
文摘We describe the first case of dicephalism in a caecilian larva, Ichthyophis bannanicus, from southeastern Guangxi, China. The two heads of the larva are united at the anterior one-third of the body. It is measured as： body mass 0.6 g, total length 42.4 mm, body width at middle 5.4 ram, head length 2.1 mm, head width 2.5 mm, snout length 1.5 mm, internarial distance 0.9 mm, and interorbital distance 1.7 ram. Compared to normal conspecific larvae, it is smaller except for the internarial distance, body mass and body width at midbody.
文摘A new unstriped Ichthyophis is found in Yunnan, China, it is distinguished from its unstriped congeners in morphology by a combination of characters including HL(head length), the number of annuli(369–372), vertebrae(114), inner mandibular teeth(36) and premaxillary-maxillary(51). The new species is also distinguished from its closest neighbour congener by a significant genetic divergence which is greater than 5.8% in the mitochondrial COI gene and greater than 6.3% in the mitochondrial cyt-b gene. As the first unstriped Ichthyophis species found in China,it is also the second species of Caecilians(Amphibian:Gymnophiona) found in China.
