George Kai Horst, Wandeness Adriane P, Santos Paulo J P
Senckenberg am Meer Wilhelmshaven, Abt. DZMB, Südstrand 44, D-26382 Wilhelmshaven, Germany Senckenberg am Meer Wilhelmshaven Wilhelmshaven Germany.
Departamento de Zoologia, Universidade Federal de Pernambuco, Recife, PE, Brazil Universidade Federal de Pernambuco Recife Brazil.
Zookeys. 2025 Jun 19;1241:325-357. doi: 10.3897/zookeys.1241.153012. eCollection 2025.
The discovery and description of a new representative of the group (Copepoda, Harpacticoida, Cletodidae T. Scott) in the Grussaí Canyon off the coast of Brazil opened up the possibility of clarifying the relationship between Sars and George. is characterised by several autapomorphies, including (a) the extensive development of long spinules on the second and third segment of the female antennule, and the strong respectively extreme elongation of (b) the exopod and (c) the setophore on the female P5. Synapomorphies shared with include (d) the formation of long spinules at the bases of P2-P4 as well as (e) on exp1 of the P2, and (f) the strong elongation of a tube pore on P2 exp2. Furthermore, the sister group relationship of and could be substantiated by eleven synapomorphies, among them (g) the large body size, (h) the development of long, rigid cephalothoracic ventrolateral anterior and posterior processes and (i) the loss of the syncoxal seta on the maxilliped. The present study represents a further step towards clarifying the systematic relationships within the group. A key to the species is provided.
在巴西海岸外的格鲁萨伊峡谷发现并描述了该类群（桡足亚纲，猛水蚤目，T. 斯科特的克莱托猛水蚤科）的一个新代表，这为阐明萨斯猛水蚤属（Sars）和乔治猛水蚤属（George）之间的关系开辟了可能性。它具有几个独征，包括：（a）雌性小触角第二和第三节上长小刺的广泛发育，以及（b）雌性第五胸足外肢和（c）刚毛柄分别强烈或极度延长。与[另一物种名称未给出]共有的共有衍征包括：（d）第二至第四胸足基部形成长小刺，以及（e）第二胸足外肢第一节上形成长小刺，还有（f）第二胸足外肢第二节上一个管孔强烈延长。此外，[物种名称未给出]和[另一物种名称未给出]的姐妹群关系可以由十一个共有衍征得到证实，其中包括：（g）体型大，（h）头胸部腹侧前后长而硬的突起的发育，以及（i）颚足上合节刚毛的缺失。本研究朝着阐明该类群内的系统关系又迈进了一步。提供了该物种的检索表。
