Vassilieva Anna B
Department of Vertebrate Zoology, Biological Faculty, Lomonosov Moscow State University, Leninskie Gory, GSP-1, Moscow 119991, Russia Joint Russian-Vietnamese Tropical Research and Technological Center of the A.N. Severtsov Institute of Ecology and Evolution, South Branch, 3, Street 3/2, 10 District, Ho Chi Minh City, Vietnam.; Email:
Zootaxa. 2015 Dec 16;4058(2):211-26. doi: 10.11646/zootaxa.4058.2.4.
A new species of the genus Oligodon from the coastal area of Binh Chau-Phuoc Buu Nature Reserve, Ba Ria-Vung Tau Province, southern Vietnam, is described. Oligodon arenarius sp. nov. is distinguishable from all other species by the unique combination of the following characters: medium size; 17 dorsal scale rows; 6-8 maxillary teeth, the posterior three being enlarged; head scalation lacking a loreal but usually including a presubocular; divided nasal; two postoculars; 131-144 ventrals; 36-60 subcaudals; unforked hemipenis, without spines or obvious papillae; sexual dimorphism displayed in the number of subcaudals (36-40 in females, 58-60 in males) and a relative tail length, tails being quite long in males (TaL/TL = 0.26-0.28) and moderate in females (TaL/TL = 0.13-0.17); head coloration pattern including ocular band, temporal bands and chevron-shaped mark on nape; dorsal coloration without distinct pattern, uniform or with dark speckling; ventrals pinkish in life, immaculate. To date, this species appear to be endemic to Vietnam.
描述了一种来自越南南部巴地头顿省平洲-福福自然保护区沿海地区的新寡齿蛇属物种。砂寡齿蛇新种与所有其他物种的区别在于具有以下独特的特征组合：中等大小；17行背鳞；6-8枚上颌齿，后三枚增大；头部鳞片无眶下鳞，但通常有一枚眼前下鳞；鼻鳞分裂；两枚眼后鳞；131-144枚腹鳞；36-60枚尾下鳞；半阴茎不分叉，无刺或明显乳突；两性异形表现为尾下鳞数量（雌性36-40枚，雄性58-60枚）以及相对尾长，雄性尾巴相当长（尾长/体长=0.26-0.28），雌性适中（尾长/体长=0.13-0.17）；头部颜色图案包括眼带、颞带和颈部的人字形斑；背部颜色无明显图案，均匀或有深色斑点；生活时腹面呈粉红色，无斑。迄今为止，该物种似乎为越南特有。
