Morales-Núñez Andrés G, Heard Richard W
Department of Natural Sciences, University of Maryland Eastern Shore, Princess Anne, MD 21853, USA; Email:
Department of Coastal Sciences, University of Southern Mississippi, Gulf Coast Research Laboratory Campus, Ocean Springs, MS 39564, USA.; Email:
Zootaxa. 2013 Nov 21;3737:454-72. doi: 10.11646/zootaxa.3737.4.7.
Ogleus pilarae n. gen., n. sp. (Leptocheliidae) is described from specimens collected at a depth of 28 m off the eastern coast of Puerto Rico. Morphologically the new genus appears to have its closest affinities with the type species of Heterotanais and those of the two subgenera belonging to Pseudonototanais sensu Guţu. Ogleus is distinguished from these and other leptocheliids by a combination of characters including a male antennule having three unfused peduncular articles, five aesthetasc-bearing flagellar articles with the first being greatly reduced and bearing a single cluster of aesthetascs, the shape of the male cheliped, and uropods of both sexes having an elongate endopod with five articles or incipient articles, the distalmost being distinctly longer than the first. The genus Pseudonototanais is rediagnosed to contain P. werthi, P. modestus (female holotype), and with reservations P. bransfieldensis. The Pseudonototanais subgenus Makassaritanais is elevated to full generic rank to contain M. angustus and M. bamberi. The male originally attributed to P. (M.) modestus, does not appear to be a leptocheliid since it has a short uropodal endopod appearing to have just two articles. The taxonomic status of some of the other taxa previously assigned to Pseudonototanais sensu lato or that are superficially similar to it is discussed. Overall, based on the females, the genera Ogleus and Makassaritanais may be more closely allied with genus Leptochelia Dana, 1849 than to Pseudonototanais and Heterotanais. A key to the male leptocheliid taxa having truncated or superficially subchelate-appearing chelae is presented.
奥氏皮拉钩虾新属新种（Leptocheliidae科）是根据在波多黎各东海岸28米深处采集的标本描述的。在形态上，这个新属似乎与异钩虾属的模式种以及古楚所定义的伪异钩虾属的两个亚属的模式种关系最为密切。奥氏皮拉钩虾与这些以及其他Leptocheliidae科动物的区别在于一系列特征的组合，包括雄性触角有三个未融合的柄节、五个具感觉毛的鞭节，第一节大大缩短且具单个感觉毛簇，雄性螯足的形状，以及两性的尾肢都有一个具五节或雏形节的细长内肢，最末端的节明显长于第一节。重新界定伪异钩虾属，包括韦氏伪异钩虾、适度伪异钩虾（雌性正模），以及存疑的布兰斯菲尔德伪异钩虾。伪异钩虾属的马卡萨尔异钩虾亚属被提升为全属等级，包括窄马卡萨尔异钩虾和班伯里马卡萨尔异钩虾。最初归为适度伪异钩虾（马卡萨尔异钩虾亚属）的雄性个体似乎不是Leptocheliidae科动物，因为它的尾肢内肢很短，似乎只有两节。讨论了一些先前归为广义伪异钩虾属或与之表面相似的其他分类单元的分类地位。总体而言，基于雌性个体，奥氏皮拉钩虾属和马卡萨尔异钩虾属可能与1849年的Leptochelia Dana属的关系比与伪异钩虾属和异钩虾属的关系更密切。给出了具有截断或表面似亚螯状螯的雄性Leptocheliidae科分类单元的检索表。
