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Three new meiobenthic species from a submarine cave in Japan: Echinoderes gama, E. kajiharai and E. uozumii (Kinorhyncha: Cyclorhagida)
Journal of the Marine Biological Association of the United Kingdom ( IF 1.2 ) Pub Date : 2020-06-15 , DOI: 10.1017/s0025315420000429
Hiroshi Yamasaki , Shinta Fujimoto , Hayato Tanaka

Three new species of echinoderid kinorhynchs are described from Daidokutsu, a submarine cave in Ryukyu Islands, Japan. Echinoderes gama sp. nov. is characterized by the presence of middorsal acicular spines on segments 4–8; lateroventral acicular spines on segments 7–9; lateroventral tubes on segment 5; sublateral tubes on segment 8; laterodorsal tubes on segment 10; and type-2 gland cell outlets in subdorsal and lateroventral position on segment 2. Echinoderes kajiharai sp. nov. is defined by the presence of middorsal acicular spines on segments 4, 6, 8; lateral accessory acicular spines on segment 9; lateroventral acicular spines on segments 6–8; lateroventral tubes on segments 2 and 5; midlateral tubes on segment 10; and type-2 gland cell outlets in laterodorsal position on segments 2 and 5, and subdorsal position on segments 8 and 9. Echinoderes uozumii sp. nov. is characterized by the presence of middorsal acicular spines on segments 4 and 6; lateroventral acicular spines on segments 6–9; lateroventral tubes on segments 2 and 5; sublateral tubes on segment 8; laterodorsal tubes on segment 10; type-2 gland cell outlets in subdorsal and lateral accessory position on segment 2; and blunt, short pectinate fringe teeth of primary pectinate fringe on segment 1. In addition, the Echinoderes multiporus species group including E. kajiharai sp. nov., and the Echinoderes bispinosus species group including E. uozumii sp. nov. are established. Furthermore, the distribution of the two species groups and the origin of Echinoderes species in Daidokutsu are discussed.

中文翻译:

来自日本海底洞穴的三种新的小型底栖动物物种:Echinoderes gama、E. kajiharai 和 E. uozumii (Kinorhyncha: Cyclorhagida)

从日本琉球群岛的海底洞穴 Daidokutsu 中描述了三种新的棘皮动物 kinorhynchs。棘皮动物sp。十一月 特征是在第 4-8 节存在背中针状棘;在节段 7-9 上的侧腹针状刺;第 5 节的侧腹管;第 8 节的次侧管;第 10 节的背侧管;第 2 节背下和腹侧位置的 2 型腺细胞出口。梶原棘皮动物sp。十一月 定义为在第 4、6、8 节段上存在背中针状棘;第 9 节的外侧副针刺;第 6-8 节的侧腹针状刺;第 2 节和第 5 节的侧腹管;第 10 节的中外侧管;第 2 节和第 5 节的背侧位置和第 8 节和第 9 节的背下位置的 2 型腺细胞出口。鲇鱼sp。十一月 特征是在第 4 节和第 6 节存在背中针状棘;第 6-9 节的侧腹针状棘;第 2 节和第 5 节的侧腹管;第 8 节的次侧管;第 10 节的背侧管;第 2 节背下和侧面附件位置的 2 型腺细胞出口;第 1 节上初级梳状边缘的钝而短的梳状边缘齿。此外,多孔棘皮动物物种群包括E. kajiharaisp。十一月,和双棘棘皮动物物种群包括E. uozumiisp。十一月 成立。此外,这两个物种群的分布和起源棘皮动物讨论了 Daidokutsu 中的物种。
更新日期:2020-06-15
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