Hemipeplus pseudoquadricollis KC & Pollock, 2025

Hemipeplus pseudoquadricollis KC & Pollock , sp. nov.

http://zoobank.org/ urn:lsid:zoobank.org:act:87C40B2B-EAAC-47A0-B825-2FDC5E4889C3

(Figs 14, 62)

Type Material. Holotype, male, labeled: ‘ BRAZIL: Rondonia. 62 km SW Ariquemes, nr Fzda. Rancho Grande 20- VIII-1993 U. Schmitz, BL trap / MYCTERIDAE . Hemipeplus det. D.A. Pollock 2016 / [dark green label] ♂ / [light green label] FSCA / [red label] HOLOTYPE ♂ Hemipeplus pseudoquadricollis KC & Pollock’, in FSCA. Two paratypes: 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

FIGURE 13. Hemipeplus angustipennis Pollock, 1999 (Holotype). A. Dorsal habitus; B. Dorsal head and prothorax; C. Lateral view of head and prothorax. Image Credit. NMNH /Lourdes Chamorro.

FIGURE 14. Hemipeplus pseudoquadricollis sp. nov. (Holotype, fig. D from paratype). A. Dorsal habitus (with scale bar); B. Dorsal head and prothorax; C. Lateral view of head and prothorax; D. Male genitalia dorsal view with spiculum gastrale; E. Tegmen dorsal view (with scale bar); F. Tegmen lateral view with one paramere removed.

D.A. Pollock’, in NMNH (this was initially H. quadricollis ); 1 specimen, male, labeled: ‘ BRAZIL: Mato Grosso, 12°50’S, 51°47’W 30.iii.1968, O.W. Richards R.S. & R.G.S. Exped, B.M. 1968-260 / At light / MYCTERIDAE Hemipeplus sp. det. R.A. Crowson’, in BMNH.

Derivation of Specific Epithet. The specific name (adjective in the nominative case, in gender agreement with substantive) is given in allusion to the resemblance of this new species to H. quadricollis .

Diagnosis. Hemipeplus pseudoquadricollis can be distinguished from the similar-appearing H. quadricollis (Fig. 10) by its shorter temples and pronotum with wider anterior emargination which extends across the width of the neck. Hemipeplus pseudoquadricollis has the following diagnostic features: temples short and angulate; scape short, moniliform; eyes large (longer than scape + pedicel); pronotum subquadriform, wide and flat with a distinct anterior emargination which extends across the width of the neck; anterolateral angles produced, rounded; pronotal pad distinct but narrow; posterolateral angles obtuse; pronotal lobe indistinct without median notch; body short and subquadriform; elytra more or less flat; color uniformly testaceous to rufotestaceous; distribution: Brazil (Rondônia), Peru (Madre de Dios).

Description. Measurements (in mm)—GHW: 0.60–0.66; HL: 0.52–0.58; AL: 0.78–0.87; GPW: 0.66–0.68; PL: 0.48–0.53; GEW: 0.93–1.00, EL: 1.90–2.00; TL: 2.90–3.11.

Head (Fig. 14B) wide (GHW/HL: 1.14–1.15); eyes large (longer than scape + pedicel), wide and convex; temples short and angulate; occiput without raised areas; antennae shorter than head and pronotum length combined; antennal scape short and moniliform; pedicel small moniliform; antennomere III more elongate and apically dilated; IV short and moniliform; V slightly larger, apically dilated; VI–X subtriangular or bowl-shaped, each wider than the next; XI subpyriform with apex narrowed after notch; lateral mandibular tooth absent. Pronotum (Fig. 14B) wide (GPW/PL: 1.28–1.38); anterior margin with distinct emargination as wide as neck; anterolateral angles rounded, fairly produced; lateral margins weakly sinuate; posterior half slightly contracted than anterior half; posterolateral angles obtuse; pronotal lobe truncate without median notch; pronotal pad (Fig. 14C) slightly raised; pronotal pits moderately deep with moderate grooves. Scutellar shield elliptical (not heptagonal as in H. quadricollis ), transverse, about twice as wide as long. Elytra (Fig. 14A) short (EL/GEW: 2.00–2.04) and flat; vestiture almost absent, very scarce; apical patch not visible. Ventral surface. Prosternal process short, not extending posterior of procoxae; hypomeral edges well separated but less so than in H. quadricollis ; mesosternal process narrow and linear. Color uniformly rufotestaceous to testaceous, shiny.

Male Genitalia (Figs 14D–F). (Tegmen length = 0.33 mm (n = 2)) Lobe of basale short, slender, and blunt; shoulders obtuse, rounded, slanted; apicale and basale with distinct suture; parameres with slight sinuation, apices straight, very pointed, thin, narrower than the bases; penis sharply expanded near basal half, narrowed at the base and apex, shorter than tegmen (Fig. 14D).

Variation. Some specimens have slightly straighter anterolateral pronotal margins while in some specimens it is more sinuate. The color varies from testaceous to rufotestaceous.

Remarks. Hemipeplus pseudoquadricollis resembles H. quadricollis with which it is sympatric; however, the male genital morphology is different, as was discussed above in the remarks for H. quadricollis .

Geographical Distribution (Fig. 62). Brazil (Rondônia), Peru (Madre de Dios).

Natural History. According to specimen label data, specimens of H. pseudoquadricollis were collected from light traps (including blacklight trap) and by rainforest canopy fogging.