Rhytomus elongatus ( van Lansberge, 1885 ), 2025

Rhytomus elongatus ( van Lansberge, 1885) , new combination

Figs 6 View FIGURE 6 , 9A View FIGURE 9

Tesserodon elongatum van Lansberge, 1885: 376 View in CoL (original description)— Paulian 1934: 287 (identification key, distribution); Paulian 1985: 221 (identification key, distribution)

Tesserodon elongatus — Gillet 1911: 40 (catalogue); Gunter et al. 2019: 453 (distribution)

Name-bearing type data. Lectotype ♂ ( MSNG) by present designation: || Nuova Guinea | Fly River | L.M.D Albertis 1876-77 ||; || TYPUS || [bordered and printed in red]; || Tesserodon View in CoL | elongatum | Lansberge Type || [handwritten]; || elongatum | Lansb. || [handwritten with a border]; || SYNTYPUS | Tesserodon View in CoL | elongatum | Lansberge, 1885 || [partly handwritten]; || WORLD SCARAB. | DATABASE | WSD00028173 || [QR code label]; || LECTOTYPE ♂ | Tesserodon View in CoL | elongatum View in CoL | van Lansberge, 1885 | des. Génier & Larsen, 2015 || [red card]. Studied.

Material examined (1♂, 1♀). PAPUA NEW GUINEA: WESTERN PROVINCE, Fly River , [08°00’ S, 142°00’E], 1876–1877, L.M. D’Albertis — ♂ lectotype, 1 ♀ paralectotype ( MHNG) .

Redescription. Measurements. Body length 6.0 mm, maximum body width 2.9 mm. Body. Overall body shape in dorsal view elongate-oval, elytral edge slightly subangular at apical third. Head. Clypeal edge lateral to clypeal teeth lacking emargination ( Fig. 6B View FIGURE 6 ), head margin at clypeogenal suture of females slightly protruding. Dorsal parts of eyes semi-ovoid, separated by an interocular space of about 5.3 times eye width. Pronotum. Pronotal width to length along midline ratio 1.7, lateral pronotal edge sharply defined throughout, pronotal pubescence long and conspicuous, 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 long and conspicuous, elytral surface between punctures appearing glossy, at most with ill-defined microsculptures ( Fig. 6A View FIGURE 6 ), basal elytral pit wide and deep, basal surface of pseudepipleuron with sharply defined simple punctures, interstriae 3–5 on basal fifth with two rows of punctures along striae, with at most a few scattered punctures. Legs. Profemoral anterior surface deeply furrowed, male metatibial apicointernal tooth set anteriorly to posterior tibial edge (e.g. Fig. 12D View FIGURE 12 ). 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. Aedeagus. Left paramere apex produced into a rounded oblique projection ( Fig. 9A View FIGURE 9 ).

Remarks. This species was described based on two syntypes. In 2015, Génier and Larsen labeled one male from this series as the lectotype.