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New genus and species of calanoid copepods (Crustacea) belonging to the group of Bradfordian families collected from the hyperbenthic layers off Japan.
ZooKeys ( IF 1.3 ) Pub Date : 2020-07-22 , DOI: 10.3897/zookeys.951.49990
Sota Komeda 1 , Susumu Ohtsuka 1
Affiliation  

A new genus and species of calanoid copepods belonging to the group of Bradfordian families, Pogonura rugosagen. et sp. nov., is described from the deep-sea hyperbenthic layers off Nagannu Island, Okinawa Prefecture, southwestern Japan. Pogonuragen. nov. is similar to another Bradfordian genus Procenognatha in sharing the following characteristics: (1) segmentation of the antennule, fused segments II–IV, X–XI, XXVII–XXVIII in females and II–IV, X–XII, XXVII–XXVIII, right XXII–XXIII in males; (2) retained setae on the ancestral segments I–IV of the antennary exopod; (3) setules on the mandibular gnathobase; (4) 3 sclerotized setae on the maxillary endopod; (5) absence of sensory seta on the maxilliped; (6) large spinules on the posterior surface of the rami of legs 2 and 3; and (7) setation and segmentation of female leg 5. Pogonuragen. nov. is distinctly distinguished from Procenognatha by the following features: (1) reduction of a seta on the ancestral segment IX of the antennary exopod, (2) 8 setae (7 in Procenognatha) on the maxillular exopod, (3) 5 brush-like setae (6 in Procenognatha) on the maxillary endopod, and (4) reduction of right endopod of male leg 5. The systematic position of Pogonuragen. nov. in the Bradfordian families is also discussed. Although this new genus shares synapomorphies with some diaixid genera, an assignment of this genus to any Bradfordian family should be pending until the taxonomy of this family group is clearly settled.

中文翻译:

从日本以外的高底栖动物层收集的属于布拉德福氏族的类cal足类(Crustacea)的新属和种。

属于Bradfordian家族的Calanoid pe足类的新属和种Pogonura rugosagen。等。nov。是在日本西南部冲绳县长安岛附近的深海高底层描述的。Pogonuragen。十一月 与布拉德福德氏菌属的另一个分支类似,它们具有以下特征:(1)雌性的前房核,II–IV,X–XI,XXVII–XXVIII和II–IV,X–XII,XXVII–XXVIII的融合节段,右XXII–XXIII,男性;(2)在触角外突的祖先段I–IV中保留刚毛;(3)在下颌颌骨上有灰烬;(4)上颌内足上有3个硬化的刚毛;(5)上颌骨缺乏感觉性刚毛;(6)在第2和第3条腿的拉米的后表面上有大的小刺;(7)女性腿5的定位和分割。Pogonuragen。十一月 与Procenognatha的明显区别在于:(1)触角突节的第IX祖节减少,(2)上颚突节的8个刚毛(Procenognatha中的7个),(3)5个刷状刚毛(在上颌内足中有6个在Procenognatha中),以及(4)减少了男性腿5的右内足。Pogonuragen的系统位置。十一月 在布拉德福家族中也有讨论。尽管这个新属与某些diaixid属具有同种亚型,但是在明确确定该家庭组的分类之前,应将该属分配给任何布拉德福家族。(3)上颌内足上有5个刷状刚毛(Procenognatha中有6个),(4)男性腿5的右内足减少。Pogonuragen的系统位置。十一月 在布拉德福家族中也有讨论。尽管这个新属与某些diaixid属具有同种亚型,但是在明确确定该家庭组的分类之前,应将该属分配给任何布拉德福家族。(3)上颌内足上有5个刷状刚毛(Procenognatha中有6个),(4)男性腿5的右内足减少。Pogonuragen的系统位置。十一月 在布拉德福家族中也有讨论。尽管这个新属与某些diaixid属具有同种亚型,但是在明确确定该家庭组的分类之前,应将该属分配给任何布拉德福家族。
更新日期:2020-07-22
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