Van Tassell James L, Kramer Annemarie
Department of Ichthyology, American Museum of Natural History, New York, NY 10024.; Email:
School for Field Studies, Bocas del Toro, Panama.; Email:
Zootaxa. 2014 May 1;3793:453-64. doi: 10.11646/zootaxa.3793.4.4.
Didogobius helenae is described from the Canary Islands. It has a sensory papillae pattern that is consistent with the current diagnosis for Didogobius, but lacks all head canals and pores that are present in other members of the genus. Pores, in general, are replaced by large papillae. The species is defined by first dorsal fin VI; second dorsal fin I,10; anal fin I,9; pectoral fin 16-17; pelvic fin I,5 and disk shaped; lateral scales 28-30, cycloid at anterior, becoming ctenoid posteriorly; cycloid scales present on belly and posterior breast; predorsal region, cheek, operculum and base of pectoral fin without scales; lower most scale on the caudal fin-base with elongate, thickened ctenii along the upper and lower posterior edges. Color in life consists of four mottled, wide brown-orange bars separated by narrower white bars on the trunk, the cheek whitish with 5 more or less circular blotches of orange, outlined in dark brown and a black spot on ventral operculum. A key to the species is provided.
海伦娜双须鳚是在加那利群岛被描述的。它的感觉乳突模式与双须鳚属目前的诊断一致，但缺少该属其他成员所具有的所有头部管道和小孔。一般来说，小孔被大的乳突所取代。该物种的特征为：第一背鳍有6根鳍棘；第二背鳍有1根鳍棘、10根软鳍条；臀鳍有1根鳍棘、9根软鳍条；胸鳍有16 - 17根鳍条；腹鳍有1根鳍棘、5根软鳍条且呈圆盘状；侧线鳞28 - 30枚，前部为圆鳞，后部变为栉鳞；腹部和胸部后部有圆鳞；背前部区域、脸颊、鳃盖和胸鳍基部无鳞；尾鳍基部最下面的鳞片在后缘上下方有细长、加厚的栉齿。活体颜色为躯干上有四条斑驳、宽阔的棕橙色条纹，被较窄的白色条纹隔开，脸颊呈白色，有5个或多或少呈圆形的橙色斑点，边缘为深褐色，鳃盖腹面有一个黑点。文中还提供了该物种的检索表。
