A dicephalic yellow anaconda snake, Eunectes notaeus (Serpentes: Boidae), from Southern Pantanal, Brazil

被引：7
|
作者：
de Albuquerque, Nelson R. [1 ]
Arruda, Wellinton S. [1 ]
Costa, Arianna S. [1 ]
Galharte, Regiane C. V. [1 ]
Vargas, Lays G. H. [1 ]
Moreno, Iva H. [2 ]
机构：
[1] Univ Fed Mato Grosso do Sul, Dept Ciencias Ambiente, Zool Lab, Corumba, MS, Brazil
[2] Univ Fed Sao Carlos, Ctr Ciencias Biol & Saude, Dept Hidrobiol, BR-13560 Sao Carlos, SP, Brazil
来源：
JOURNAL OF NATURAL HISTORY | 2010年 / 44卷 / 31-32期
关键词：
Serpentes; Eunectes; dicephalism; Southern Pantanal; Brazil;
D O I：
10.1080/00222931003764105
中图分类号：
X176 [生物多样性保护];
学科分类号：
090705 ;
摘要：
We describe a case of dicephalism in a yellow anaconda snake, Eunectes notaeus, from southern Pantanal, Brazil. The specimen exhibits two heads and two long necks, which are united on the anterior third of the body. Two hearts, three lungs, two livers, and two stomachs are also present. The left heart is larger and more cranial than the right heart although they are in the normal position. Radiographs revealed approximately 64 vertebrae in the right neck, 57 in the left neck, eight in the fusion zone, 202 in the trunk, and 52 in the tail. According to the classification adopted in the present study the specimen herein described is a proarchodichotomous specimen. This is the first record of dicephalism in Eunectes. Further, this snake represents the 28th documented case of dicephalism within the family Boidae and the 1088th case in snakes.
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收藏
页码：1989 / 1994
页数：6
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