Renda grandipenis, Márquez, 2010

Márquez, Juan, 2010, Revision of the genus Renda Blackwelder, 1952 (Coleoptera: Staphylinidae: Xantholinini) 2686, Zootaxa 2686 (1), pp. 1-61 : 21-22

publication ID 10.11646/zootaxa.2686.1.1

persistent identifier

treatment provided by


scientific name

Renda grandipenis

sp. nov.

Renda grandipenis sp. nov.

Type material ( 1 specimen). Holotype, male: “ ECUADOR: Cosanga , Napo, 2000 m, 11-IV-1996, C. Salvador ” ( QCAZ).

Description. Total length 20.0 mm. Body black, shining, with red mouthparts and tarsi.

Head. Oval (similar to Fig. 11), 1.43x as long as wide; dorsally and ventrally slightly convex; dorsal surface with very dense umbilicate punctures, and ventral surface with moderately dense umbilicate punctures separated by 2–3x their width ( Fig. 23); temple with inferior temporal carina and a concave area ( Fig. 32); eyes 0.29x as long as head; first antennomere 2.06x as long as antennomeres 2–3 combined, apical antennomere 1.06x as long as antennomeres 9–10 combined; labrum slightly bilobed ( Fig. 54); with mandibular external channel; apical maxillary palpomere elongate ( Fig. 38), 1.72x as long as preapical palpomere; apical labial palpomere moderately widened and flattened apically ( Fig. 44), nearly twice as long as preapical palpomere.

Thorax. Pronotum 1.5x as long as wide; 1.12x as wide as head; with dense umbilicate punctures and a narrow, longitudinal impunctate area, with anterior half slightly wider ( Fig. 49); anterior half with small impunctate areas lateriad of median impunctate area; without depressed areas in posterior third. Elytra 1.08x as long as pronotum, with setae as in R. flagellicornis . Prosternum transverse, with setae sparser than on meso and metasternum.

Abdomen: Covered with setae as in R. flagellicornis .

Aedeagus. Ovally elongate, base of median lobe widened; total length 4.24 mm; parameres 0.29x as long as median lobe; apical area of median lobe 0.14x total length of median lobe, and internal sac with sclerotized structures ( Fig. 69).

Variation. Unknown.

Comparison. This species is similar to R. flagellicornis but can be distinguished by the apical antennomere, which is as long as antennomeres 9–10 combined, the moderately dense umbilicate punctures on the ventral cephalic surface and mainly by the large aedeagus, with short parameres; while R. flagellicornis has an apical antennomere slightly shorter than antennomeres 9–10 combined, dense umbilicate punctures on the cephalic ventral surface and a shorter aedeagus with longer parameres.

Etymology. The name of this species is derived from the Latin words “grandis” and “penis” and refers to the large aedeagus, the largest of this species group.

Geographical distribution. Ecuador.


Museo de Zoologia, Pontificia Universidad Catolica del Ecuador