Hemipeplus quadricollis Pollock 1999
Creators: name: Kc, Sajan
name: Pollock, Darren A.
Publisher: name: Zenodo
Year: 2025
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Mycteridae
Hemipeplus
Hemipeplus quadricollis

description: Hemipeplus quadricollis Pollock, 1999
(Figs 10, 62)
Hemipeplus quadricollis Pollock, 1999: 71, Figs 3F, 6F, 10.
Taxonomic note. The paratype available from Peru (Madre de Dios Department) is H. pseudoquadricollis KC & Pollock, sp. nov.; it is possible therefore that the additional Peruvian paratype of H. quadricollis mentioned in Pollock (1999) from Loreto Department may in fact be H. pseudoquadricollis sp. nov. Thus, Peru, for now, is removed from the distribution of this species until the remaining Peruvian paratype (in FSCA) is studied.
Type Material. Holotype, sex unknown, labeled: ‘ BRAZIL: Rondonia, 62 km. SW Ariquemes, nr. Fzda. Rancho Grande 12–IX–1992 U. Schmitz blacklight trap / [pink label] FSCA / [red label] HOLOTYPE Hemipeplus quadricollis Pollock D.A. Pollock 1997 ’, in MZSP. Three paratypes: 2 specimens, 1 male, 1 female, labeled: ‘ BRAZIL: Rondonia, 62 km. SW Ariquemes, nr Fzda. Rancho Grande, 12–IX–1992 U. Schmitz, blacklight trap [‘BL Trap’ in the other]/ quadri / [pink label] DAPC / [red label] FSCA / [blue label] PARATYPE Hemipeplus quadricollis D.A. Pollock’, in DAPC; 1 specimen, male, labeled: ‘ PERU Madre de Dios Rio Tambopata Res. 30km (air) SW Pto. Maldonato, 290m 12°50’S 069°20’W / Smithsonian Institution Canopy Fogging Project T.L. Erwin et al. colls. 02May84 02/02/082 / FOGGING 0050185 / HEMIPEPLUS SP. Det. J.F. Lawrence/ [blue label] PARATYPE Hemipeplus quadricollis D.A. Pollock’, in NMNH (this is H. pseudoquadricollis).
Other Material Examined. BRAZIL. Rondônia. 62 km SW Ariquemes, nr Fzda Rancho Grande, 25.xi.1993, U. Schmitz leg., Black Light Trap, (FSCA, 1♀); same locality, 5–17.x.1993, J.E. Eger leg., Black Light Trap, (FSCA, 1♂).
Diagnosis. Hemipeplus quadricollis can be distinguished from the similar-appearing H. pseudoquadricollis sp. nov. (Fig. 14) by its prominent temples and a narrower emargination on the anterior margin of the pronotum, which does not extend across the width of the neck. Hemipeplus quadricollis has the following diagnostic features: temples prominent and obtuse, rounded (about 1/3 length of eye); scape short, moniliform; eyes large (longer than scape + pedicel), moderately wide and moderately convex; pronotum subquadriform, wide and flat with indistinct emargination narrower than the neck; anterolateral angles slightly produced, rounded; pronotal pad not very distinct; posterolateral angles squarish, angulate; pronotal lobe slight without median notch; scutellar shield heptagonal, transverse, less than twice as wide as long; body short and subquadriform; elytra more or less flat; color uniformly testaceous to rufotestaceous; distribution: Brazil (Rondônia).
FIGURE 10. Hemipeplus quadricollis Pollock, 1999 (Paratype). A. Dorsal habitus (with scale bar); B. Dorsal head and prothorax; C. Lateral view of head and prothorax; D. Male genitalia dorsal view without spiculum gastrale; E. Tegmen dorsal view (with scale bar); F. Tegmen lateral view with one paramere removed.
Male Genitalia (Figs 10D–F). (Tegmen length = 0.27 mm (n = 2)) Lobe of basale short and slender; shoulders obtuse, rounded, not much slanted; apicale and basale with distinct suture; parameres straight, slightly sinuate near the apical half; apices of parameres very pointed and thin, inner margin with a notch near the apical half; penis subequal to tegmen.
Variation. Some specimens have slightly deeper anterior emargination on pronotum while some have fairly straight anterior margin of pronotum.
Remarks. A similar species found in this study, H. pseudoquadricollis, superficially resembles H. quadricollis and is sympatric; however, the male genital morphology is different. Externally as well, there are noticeable differences such as those given in the diagnosis.
Geographical Distribution (Fig. 62). Brazil (Rondônia).
Natural History. According to specimen label data, adults of H. quadricollis have been collected from blacklight traps; Pollock’s (1999) specimen, collected by canopy fogging in a rainforest, is H. pseudoquadricollis sp. nov.
description: Published as part of Kc, Sajan & Pollock, Darren A., 2025, Review of the Hemipeplinae (Coleoptera: Mycteridae) fauna of the world with descriptions of twenty-nine new species, pp. 1-140 in Zootaxa 5574 (1) on pages 30-32, DOI: 10.11646/zootaxa.5574.1.1, http://zenodo.org/record/14746103