A New Species of Parmaturus (Chondrichthyes: Carcharhiniformes: Scyliorhinidae) from Brazil, Southwestern Atlantic
A New Species of Parmaturus (Chondrichthyes: Carcharhiniformes: Scyliorhinidae) from Brazil, Southwestern Atlantic
复制标题
西南大西洋巴西的一新种 Parmaturus（软骨鱼目：真鲨目：Scyliorhinidae）
作者：
Karla D. A. Soares;M. R. Carvalho;P. Schwingel;O. B. Gadig
从巴西海域捕获的两个标本中，记述了大西洋西南部Parmaturus的一新种，P.angelae，新种。它与同类的区别在于：第一背鳍的起源在腹鳍起源的前面，存在发育良好的上、下尾骨小齿，背鳍近等长，侧齿泪滴状，缺乏侧尖，牙节均匀分布，比例尺寸和脊椎计数。该属新种是大西洋报道的第二个种，也是印度-西太平洋地区以外的第三个种。Parmaturus的定义仍然相当模糊，因为只有两个物种被详细地解剖研究过。
A new Southwestern Atlantic species of Parmaturus, P. angelae, new species, is described from two specimens captured off Brazil. It is distinguished from congeners by the following characters: origin of the first dorsal fin anterior to pelvic-fin origin, presence of well-developed upper and lower caudal crests of denticles, dorsal fins subequal, lateral denticles teardrop-shaped and lacking lateral cusplets, denticles evenly spaced, proportional dimensions, and vertebral counts. Parmaturus angelae, new species, is the second species of the genus reported from the Atlantic Ocean and only the third species outside of the Indo-West Pacific region. Parmaturus remains rather poorly defined as only two species have been studied anatomically in any detail.