海南三亚一头死亡中华白海豚的形态学记录

Morphological measurements of a dead Indo-Pacific humpback dolphin(Sousa chinensis) at Sanya,Hainan Province,China

中华白海豚（Sousa chinensis）隶属鲸目（Cetacea）齿鲸亚目（Odontoceti）海豚科（Delphinidae）驼背豚属（Sousa），是生活在河口区域的沿岸暖水种，1988年被列为国家一级保护动物。

On February 2,2015, a dead female Indo-Pacific humpback dolphin （Sousa chinensis） was found in the coastal water of Meilian Village, Yacheng Town, Sanya City, Hainan Province, China. It was the first Indo-Pacific humpback dolphin death case ever found in waters southwest of Hainan Island. In the present study, data about external morphology and skeleton system of the dead dolphin were documented, Body length and body mass of the animal were 235.0 cm and ca. 150 kg, respectively, with completely white body color. The cranium of this dolphin wa 189 mm in zygomatic width, and 415 mm in skull length. Its vertebra formula was C6＋T12＋L10＋Ca20=48. It had 12 pairs of ribs and 11 V-bones. According to previous reports, our skeleton sample may have one cervical vertebra missing, and one or more caudal vertebras and V bones missing. More new skeleton samples from the same population are needed to confirm this presumption.