Scholarlink

<p>A new species of maerid amphipod belonging to the castelloserrate group of the genus <i>Elasmopus</i> is described from the rocky intertidal zone of Arjyapalli, Odisha, India. <i>Elasmopus arjyaensis</i> sp. nov. is distinguished by a three-articulate accessory flagellum, the presence of two processes on the palm of the male gnathopod 2, a single basofacial robust seta on the peduncle of uropod 1, and a characteristic pattern of marginal setae on the uropodal rami. Morphological comparison shows closest affinity with <i>E. helenae</i>, from which the new species differs in stable diagnostic characters of the gnathopod and uropods. Mitochondrial COI analysis supports its placement within <i>Elasmopus</i> and indicates high sequence similarity with material from China, suggesting wide distributional range. The description of this species increases the global castelloserrate group of the genus <i>Elasmopus</i> to 29 species and the Indian <i>Elasmopus</i> fauna to 12 species. The current article also provides two keys for the genus <i>Elasmopus</i>: one for the castelloserrate group with geographical distribution, and another for species distributed in Southeast Asia.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Description of a new species of the genus Elasmopus A. Costa, 1853 (Amphipoda: Maeridae) by morphological and molecular analysis

  • 期刊论文

  • 发表日期：

    2026年5月25日

查看全文
  • Shreeraj Nahak,
  • Suman Patra,
  • Shesdev Patro

摘要

A new species of maerid amphipod belonging to the castelloserrate group of the genus Elasmopus is described from the rocky intertidal zone of Arjyapalli, Odisha, India. Elasmopus arjyaensis sp. nov. is distinguished by a three-articulate accessory flagellum, the presence of two processes on the palm of the male gnathopod 2, a single basofacial robust seta on the peduncle of uropod 1, and a characteristic pattern of marginal setae on the uropodal rami. Morphological comparison shows closest affinity with E. helenae, from which the new species differs in stable diagnostic characters of the gnathopod and uropods. Mitochondrial COI analysis supports its placement within Elasmopus and indicates high sequence similarity with material from China, suggesting wide distributional range. The description of this species increases the global castelloserrate group of the genus Elasmopus to 29 species and the Indian Elasmopus fauna to 12 species. The current article also provides two keys for the genus Elasmopus: one for the castelloserrate group with geographical distribution, and another for species distributed in Southeast Asia.