George Kai Horst, George Kai Horst, Glatzel Thomas, Schröder Katharina
Senckenberg am Meer Wilhelmshaven, Abt. Deutsches Zentrum für Marine Biodiversitätsforschung, DZMB, Südstrand 44, 26382 Wilhelmshaven, Germany.
Zootaxa. 2019 Dec 6;4706(1):zootaxa.4706.1.7. doi: 10.11646/zootaxa.4706.1.7.
Findings of a new representative of the Laophontodinae Lang, 1944 (Copepoda, Harpacticoida) from the Napoleon Reef (Gulf of Aqaba, Red Sea, Egypt) provided new insights into the systematics of the type genus Laophontodes T. Scott, 1894. Bicorniphontodes clarae gen. et sp. nov., which is described in the present contribution, shares exclusively six derived characters with Laophontodes bicornis A. Scott, 1896, L. horstgeorgei George Gheerardyn, 2015, and partly with L. hamatus (Thomson, 1883), and L. ornatus Krishnaswamy, 1957: (1) cephalothorax medio-laterally with triangular extensions and (2) postero-laterally with paired cuticular processes, (3) free body somites except telson dorsally with hyaline frills ending in rounded lappets, (4) furcal setae I and II displaced subapically, (5) antennar allobasis lacking abexopodal seta on endopodal half, (6) outer spines of the last segment of swimming legs 2 and 3 unipinnate and comb-like, with the pinnae being extremely long and set widely apart. Thus, the named species are excluded from Laophontodes and united together with B. clarae gen. et sp. nov. in Bicorniphontodes gen. nov. as Bicorniphontodes bicornis comb. nov., B. hamatus comb. nov., B. horstgeorgei comb. nov., and B. ornatus comb. nov.. Beside the description of B. clarae gen. et sp. nov., a detailed phylogenetic discussion regarding the systematic relationships of the named species and the justification of the erection of Bicorniphontodes gen. nov. is given, including its distribution in the world's oceans. A key to species is also provided.
从拿破仑礁（埃及红海亚喀巴湾）发现的1944年朗氏老丰猛水蚤亚科（桡足纲，猛水蚤目）的一个新代表种，为1894年T. 斯科特命名的老丰猛水蚤属的系统分类提供了新见解。本文描述的新属新种克莱拉双角猛水蚤，仅与1896年A. 斯科特命名的双角老丰猛水蚤、2015年乔治·吉尔拉丹命名的霍斯特·乔治老丰猛水蚤有六个共同衍征，部分与1883年汤姆森命名的具钩老丰猛水蚤、1957年克里希纳斯瓦米命名的饰纹老丰猛水蚤相同：（1）头胸部中侧有三角形延伸；（2）后侧有一对表皮突起；（3）除尾节外，自由体节背面有透明褶边，末端为圆形叶状；（4）尾叉刚毛I和II近顶端移位；（5）触角异节在末节内半部无外节刚毛；（6）游泳足2和3末节的外刺单羽状且呈梳状，羽片极长且间隔很宽。因此，上述已命名的物种被排除在老丰猛水蚤属之外，与克莱拉双角猛水蚤新属新种一起归入双角猛水蚤属，成为双角双角猛水蚤新组合、具钩双角猛水蚤新组合、霍斯特·乔治双角猛水蚤新组合和饰纹双角猛水蚤新组合。除了对克莱拉双角猛水蚤新属新种的描述外，还给出了关于上述已命名物种系统关系的详细系统发育讨论以及双角猛水蚤属新属建立的理由，包括其在世界海洋中的分布。还提供了物种检索表。
