Description of a new abyssal copepod associated with the echinoid Sperosoma grimaldii Koehler, 1897 (Crustacea & Echinodermata)

作者：Anton Roland F^*; Stevenson Angela; Schwabe Enrico

来源：Spixiana, 2013, 36(2): 201-210.

During an exploration of the Irish deep-sea in 2011, a second species of the genus Pionodesmotes Bonnier, 1898 was discovered in the Whittard Canyon system at the southern continental margin. It is described here based on scanning electron microscopic observations. The new species is distinguished from its sole congener, Pionodesmotes phormosomae Bonnier, 1898, by morphological characteristics, including a labrum that completely covers the mouth, the sharply pointed mandible, the unarmed triangular genital lobes, and by the fusion of the abdomen with the thorax in males. The new species Pionodesmotes domhainfharraigeanus spec. nov., is a gall-building copepod, which is only known from the North Atlantic deep-sea. Both members of Pionodesmotes infest echinothurids; the new species is only recorded from the sea urchin Sperosoma grimaldii Koehler, 1897 while the type species, Pianodesmotes phormosomae, infests Hygrosoma petersii (A. Agassiz, 1880).

• 出版日期2013-12