Rhytomus heurni ( Paulian, 1937 ), 2025

Rhytomus heurni ( Paulian, 1937) new combination

Fig. 7B View FIGURE 7 , 8B View FIGURE 8 , 11F View FIGURE 11

Tesserodon heurni Paulian, 1937: 122 View in CoL (original description)— Paulian 1985: 221 (diagnosis, distribution, comment); Gunter et al. 2019: 453 (distribution)

Name-bearing type data. Holotype ♀ ( SDEI): || N. Guinea Exped. | W.C. van Heurn | 1410 m. Okt. 1920 | Dormanpadbivak ||; || Holotypus || [red card]; || DEI Müncheberg | Col-05059 || [blue card]; || WORLD SCARAB. | DATABASE | WSD00028176 || [QR code label]; || Tesserodon View in CoL | Heurni n. sp. Type | det. R. Paulian 1937 || [partly handwritten]. Studied.

Redescription. Measurements. Body length 4.3 mm, maximum body width 3.1 mm. Body. Overall body shape in dorsal view oval, elytral edge evenly rounded from base to apex. Head. Clypeal edge lateral to clypeal teeth lacking emargination, head margin at clypeogenal suture of females slightly protruding. Dorsal parts of eyes semi-ovoid, separated by an interocular space of about 4.1 times eye width. Pronotum. Pronotal width to length along midline ratio 1.8, lateral pronotal edge sharply defined throughout, pronotal pubescence short and fine, pronotal basal portion along midline lacking fine longitudinal depression. Elytra. Elytral maximum width to length along suture ratio 1.1, elytral outline moderately convex in lateral view, elytral pubescence short and fine, elytral surface between punctures appearing glossy, at most with ill-defined microsculptures, basal elytral pit slightly wider than stria 10 and shallow, basal surface of pseudepipleuron with sharply defined ocellate punctures ( Fig. 11F View FIGURE 11 ), interstriae 3–5 on basal fifth with scattered unaligned punctures. Legs. Profemoral anterior surface flat. Pygidium. Pygidial surface along midline with punctures similar in density to rest of discs, pygidial surface along basal groove smooth between punctures, pygidium of female evenly convex ( Fig. 8B View FIGURE 8 ).

Remarks. The original description of this species is based on a single female specimen collected during W. C. van Heurn New Guinea expedition in October 1920. The type locality “Dormanpadbivak” roughly translates to “Doorman path bivouac.” According to Holthuis and Husson (1973) this locality was approximating 3º24’S 138º38’E at 1410-1450m, which is about 25km S. of Prauwenbivak.