标本采集地点 (Location of Collecting): Mexico
标本采集时间 (Time of Collecting): 2021年
采集人 (Collector): ?
制作人 (Specimen Maker): 冯浈皓
Description.
Head: anterior border of labrum concave, anterior angles rounded. Frontoclypeal suture lacking between internal tubercles. Frontal ridges absent, internal tubercles absent or very small. Median frontal structure (MFS) with a notable central horn, relatively short and with apex free and rounded; with 0-4 setae on each side or 0-2 small punctations. Ligula between insertions of labial palpi, wide, concave or flat, without setae at center, anteriorly triangular (almost pentagonal with the base); ligula matte. Lateral lobes of mentum flat; center of mentum anteriorly bilobate. Last segment of labial palpi large, 1/2 or more than 1/2 of second segment. Dorsal tooth of mandible small, with obtuse angle in lateral view; aspect of mandibles in ventral view rounded; external part of mandible without a ventral keel.
Thorax: Pronotum shiny and smooth, lateral fossae without setae and punctation. Scutellum with small punctate setae. Mesosternum with many long setae on posterior sides and similar abundant setae on mesosternellum. Metasternal disk delimited partially or totally by setose punctation, marginal groove very narrow.
Elytra: Shiny and smooth (in some cases slightly grooved); elytral striae marked with strong punctation. Setae present in all interestriae of anterior margin and all of posterior except I, II and III; interestriae VIII, IX and X totally covered with setae; IX more densely setose in apical 1/3. In old specimens these setae appear only as punctures.
Legs: Mesotibiae with two or three spines on external border (one in some old specimens).
鉴定描述:体大型,黑色;触角端部三节显著增长,成鳃状;头额中央有一向前的角,眼前有一突起。上颚上突齿短。鞘翅边缘具密集的棕黄色刚毛且刚毛衍生至鞘翅端部。