Shin Chulwoo
University of Kansas, Biodiversity Institute, Entomology Division, Crestline Drive (Public Safety Building), Suite #140, Lawrence, KS 66049, U.S.A. Johnson County Community College, Science Division, 12345 College Boulevard, Overland Park, KS 66210, U.S.A.; Email:
Zootaxa. 2016 Sep 6;4161(3):329-44. doi: 10.11646/zootaxa.4161.3.2.
The genus Eurypedus Gistel is revised based on detailed morphological study, including examination of the mouthparts and genitalia. Besides previously known diagnostic characters, such as an oblong and laterally parallel-sided body, narrow elytral lamella, narrow prosternal process between the procoxae, and angled pronotal base, new diagnostic characters are identified: antennal notches on the ventral surface of antennomeres V-XI, a stridulatory file on the vertex, and paired projections on the ventral surface of the pronotum. The distinct stridulatory file is found only in males. The number of ridges of the stridulatory file varies between 48 and 59. Eurypedus thoni Barber (= Cassida oblonga Sturm in Thon) syn. nov. is synonymized with E. peltoides (Boheman). The remaining two species E. peltoides and E. nigrosignatus (Boheman) show distinct distributions separated by the Amazon Basin.
基于详细的形态学研究，包括对口器和生殖器的检查，对宽步甲属（Eurypedus Gistel）进行了修订。除了先前已知的诊断特征，如长方形且侧面平行的身体、狭窄的鞘翅薄片、前胸基节之间狭窄的前胸腹板突以及有角度的前胸基部外，还发现了新的诊断特征：触角第五节至第十一节腹面的触角凹口、头顶上的摩擦发音锉以及前胸腹面的成对突起。独特的摩擦发音锉仅在雄性中发现。摩擦发音锉的脊数在48至59之间变化。宽步甲属的托氏宽步甲（Eurypedus thoni Barber = 托恩的斯图姆宽步甲Cassida oblonga Sturm in Thon）新异名被归为盾形宽步甲（E. peltoides (Boheman)）的异名。其余两个物种，盾形宽步甲（E. peltoides）和黑纹宽步甲（E. nigrosignatus (Boheman)）呈现出由亚马逊盆地分隔的不同分布。
