Angarita-Sierra Teddy
YOLUKA ONG, Fundación de Investigación en Biodiversidad y Conservación, Carrera 24 No. 51-81 Piso 3 Grupo de investigación Cladística Profunda y Biogeografía Histórica, Laboratorio de Anfibios, Instituto de Ciencias Naturales, Universidad Nacional de Colombia.
Zootaxa. 2017 Mar 22;4244(4):478-492. doi: 10.11646/zootaxa.4244.4.2.
We describe a new species of the genus Ninia from the Chocó-Magdalena biogeographic province, which was previously reported as a distinct population of N. maculata or as N. atrata from the western slopes of the Cordillera Occidental of Colombia. The new species is similar to N. atrata, N. celata, N. espinali, N. franciscoi, and N. maculata. It shares the following characteristics with the species mentioned above: 19 dorsal scale rows without reductions; dorsal ground color black or dark brown; white or cream occipital nuchal collar. However, it is easily distinguished from all other congeners because it has a non-regular color pattern in the ventral surfaces of the head and body, subcaudal surface homogeneously black or dark brown, two nasal scales, and one lateral projection ornamented with a large basal hook-shaped spine that is larger than any other spine on the hemipenial body. The presence of a lateral projection on the hemipenial body makes the new species the only member of the genus from South America that shares this feature with its Central American congeners. This feature suggests a closer relationship with this linage. Finally, our results indicate that proper and careful revision of the Ninia atrata species complex will help to understand and clarify the taxonomic composition of the genus.
我们描述了一种来自乔科-马格达莱纳生物地理省的新尼尼亚属物种，该物种此前被报道为黄斑尼尼亚的一个独特种群，或被认为是哥伦比亚西科迪勒拉山西坡的黑尼尼亚。新物种与黑尼尼亚、隐尼尼亚、埃斯皮纳利尼尼亚、弗朗西斯科伊尼尼亚和黄斑尼尼亚相似。它与上述物种具有以下共同特征：19行背鳞无减少；背部底色为黑色或深棕色；枕部颈部有白色或奶油色项圈。然而，它很容易与所有其他同属物种区分开来，因为它在头部和身体腹面具有不规则的颜色图案，尾下表面均匀为黑色或深棕色，有两枚鼻鳞，以及一个带有大的基部钩状刺的侧突，该刺比半阴茎体上的任何其他刺都大。半阴茎体上存在侧突使得新物种成为南美洲该属中唯一与中美洲同属物种具有这一特征的成员。这一特征表明它与该谱系关系更为密切。最后，我们的结果表明，对黑尼尼亚物种复合体进行恰当且仔细的修订将有助于理解和阐明该属的分类组成。
