Echinoderes ultraabyssalis sp. nov. from the Kuril-Kamchatka Trench - the first hadal representative of the Kinorhyncha (Kinorhyncha: Cyclorhagida)

被引：15
作者：
Adrianov, Andrey, V [1 ,2 ,3 ]
Maiorova, Anastassya S. [1 ,2 ,3 ]
机构：
[1] Russian Acad Sci, Far Eastern Branch, Natl Sci Ctr Marine Biol, Vladivostok 690041, Russia
[2] Far Eastern Fed Univ, Vladivostok 690950, Russia
[3] FEBRAS, Natl Ctr Marine Biol, Palchevskogo 17, Vladivostok 690041, Russia
来源：
PROGRESS IN OCEANOGRAPHY | 2019年 / 178卷
关键词：
Kuril-Kamchatka trench; Abyss; Ultraabyssal; Hadal; Meiofauna; Kinorhynchs; Species description; Sensory spots; Echinoderes; DEEP-SEA FLOOR; ATLANTIC-OCEAN; GUINEA BASIN; N; GENUS; SEAMOUNTS; HOMALORHAGIDA;
D O I：
10.1016/j.pocean.2019.102142
中图分类号：
P7 [海洋学];
学科分类号：
0707 ;
摘要：
A new species of echinoderid kinorhynchs, Echinoderes ultraabyssalis sp. nov. collected from oxidized brown clay at the deepest depression of the Kuril-Kamchatka Trench, North-West Pacific, is described and illustrated using light and electron microscopy. This new representative of the largest kinorhynch genus is characterized by the unique set of spines and tubules and can be easily distinguished from other congeners. The first trunk segment shows remarkably wrinkled posterior margin with parallel cuticular notches; the second trunk segment bears pair of adhesive tubules in both sexes; trunk segment 5 with pair of tubules in lateroventral position; trunk segment 8 with lateral accessory tubules; trunk segment 9 with tubules in laterodorsal position; acicular lateroventral spines on trunk segments 6-9 and two acicular middorsal spines on trunk segments 6 and 8. This species is also well recognized by the presence of tooth-like middorsal protuberance on trunk segment 11. Echinoderes ultraabyssalis sp. nov. constitutes the deepest kinorhynch species described so far (9411-9541 m) and the first hadal representative of the Kinorhyncha in the World Ocean.
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页数：11
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