Archellerenius giustoi Wanat, 2013, sp. nov.
Creators: name: Wanat, Marek
Publisher: name: Zenodo
Year: 2013
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Brentidae
Archellerenius
Archellerenius giustoi

description: Archellerenius giustoi sp. nov.
(Figs 3, 9–37)
Type material. Holotype ♂: a) New Caledonia, Col des Roussettes, 500 m, 5 Feb 1963, G. Kuschel (NZAC).
Paratypes (5 ♂ 3 ♀): Province Nord: Mt. Aoupinié, W of Ponerihouen [near sawmill, -21.1555/165.3201], 550 m, 30–31 VII 1971, beating, 1 ♂, leg. J. Gressitt (BPBM). Mt Panié (refuge hut), 20.34.43S/164.46.04E [-20.5786/ 164.7678], 1330 m, humid montane forest, 2 II 2004, 1 ♀; 1200–1300 m, 3 II 2004, 1 ♂ 1 ♀ - all leg. MW (MW). Upper Tchamba Valley: Wâo Uni (refuge), -21.0057/165.2487, 400 m, 15 I 2007, night beating, 1 ♂, leg. MW (MW). Col des Roussettes (rainforest near refuge), -21.4074/165.5250, 530 m, 2 XII 2010, 1 ♀, leg. MW (MW).
Province Sud: Pic du Pin base (forest & plantation), -22.2482/166.829, 280 m, 26 XII 2006, 1 ♂, leg. MW & RD (MW). Mt Humboldt (S trail), Botanical Reserve, -21.8827/166.3997, 1130–1280 m, moss forest, 10 XI 2008, 1 ♂, leg. MW (MW).
Total distribution in Fig. 46.
Diagnosis. See generic diagnosis above.
Description. Body 2.8–3.2 mm long; antennal scape entirely testaceous.
Rostrum shaped as in Figs 13–16, at base finely punctured, rugose at sides; prorostrum shiny, with microscopic punctures at least basally. Antennal club as long as 6 distal funicular segments combined. Head: frons usually with shallow V-like fovea; vertex evenly flattened throughout; subocular tooth usually weakly expressed in head profile. Antennae (Fig. 19): length/width ratios: scape 6.5–8.0, funicular segments: 1st 1.3–1.5, 2nd ca. 2.5, 6th–7th 1.0, scape as long or longer than 6 basal funicular segments combined. Pronotum weakly rounded at sides (Fig.12); hypomeron acutely prominent at posterior margin. Elytra moderately convex (Figs 9–11); striae superficial; intervals flat, finely microreticulate and shiny. Fore leg as in Figs 18, 20. Abdomen (ventrites 1–5) 1.2× longer than broad.
Male. Antennal club about 2.5× as long as wide. Abdominal ventrites narrower (Fig. 25); 5th ventrite twice as wide as long, broadly truncate, moderately and evenly convex, middle of apical margin with sparse fringe of white setae (Fig. 26). Pygidium: apical third exposed, strongly declivitous, with distinct marginal rim; separating sulcus obsolescent (Figs 23, 24). Sternite VIII with distinct carinae. Sternite IX with untoothed apodeme, ca. 1.6× as long as basal fork (Fig. 35). Tegminal apodeme strongly expanded in apical third; tegminal plate 1.3–1.4× as long as broad, with lateral arms much thinner than adjoining arms of basal piece (Figs 36, 37); membranous lobes short, rounded, apically extended into narrow, acute processes, these microsetose apically; suprafenestral sclerites half as long as fenestrae, acutely produced along internal margins; sensillae indistinct; macrochaetae 6–8, short, hardly exceeding acute sclerotized projections of parameroid lobes; membrane beneath fenestrae sclerotized equally to prostegium; postfenestral sclerite bar-like; prostegium long, deeply incised laterally, divided on its 0.6–0.7 length. Penis: apodemes as long as pedon, strongly expanded apicad; tectum reaching apical fourth of pedon; pedon with rounded, strongly upcurved apex (Figs 33, 34), ventrally membranous in basal half; endophallus with enclosed part densely microspinose in basal third, with sharp and straight distal border-line separating it from big, simply membranous terminal process, the latter with paired basal lobes covering entrance of ejaculatory duct, microplates in sub-orificial region extremely fine and indistinct.
Female. Antennal club more obtuse, 2.0–2.2× as long as wide (Fig. 19). Abdominal ventrites shaped as in Figs 27, 28. Tergite VII short, broadly rounded (Fig. 30). Tergite VIII transverse, largely membranous, with narrow but complete marginal sclerotisation. Sternite VIII (spiculum ventrale) relatively short, slightly widened in middle part, apically with triangular expansion (Fig. 32). Styli stout and short, hemispherical, with several apical setae; coxites subtruncate apically. Foretube darkened, with dense long microtrichia. Bursa copulatrix relatively large, with corrugated longitudinal folds. Spermatheca: corpus with hook-like process receiving relatively thick spermathecal duct (Fig. 31).
Morphological indices in Tab. 1. For other characters see generic description above.
Etymology. This remarkable and rare species is named to honor Mr. Carlo Giusto, an enthusiastic student of Apionidae, for his passion for these inconspicuous weevils, and shared interest in the genus Hellerenius.
description: Published as part of Wanat, Marek, 2013, The Apionidae (Coleoptera: Curculionoidea) of New Caledonia. Genera Archellerenius gen. nov. and Hellerenius Wanat, pp. 515-542 in Zootaxa 3717 (4) on page 518, DOI: 10.11646/zootaxa.3717.4.5, http://zenodo.org/record/249082