Taxonomic revision of the genus Parena Motschulsky, 1860 (Coleoptera, Carabidae, Lebiini, Metallicina) Author Shi, Hongliang 0000-0002-9989-5830 shihl@bjfu.edu.cn Author Liang, Hongbin 0000-0002-9989-5830 shihl@bjfu.edu.cn text Zootaxa 2023 2023-05-18 5286 1 1 144 http://dx.doi.org/10.11646/zootaxa.5286.1.1 journal article 263342 10.11646/zootaxa.5286.1.1 67e7a105-1f62-414a-83d9-f758039eb726 1175-5326 7958937 F9834684-24D3-4795-B5EB-77B451DF856D [9] Parena ( Crossoglossa ) sciakyi sp. nov. Habitus: Fig. 25 . Gonocoxites of ovipositor: Fig. 11 γ. Type locality. Guadalcanal of the Solomon Islands . Type material . Holotype (CRS, Fig. 25 ): female, body length = 11.3 mm , board mounted, "South Pasific, Solomon Is. / GUADALCANAL I., 750–900 m / Karukiki env., 20-25 km SSE / of Honiara , 1-18.XII.2016 / St. Jakl leg."; " HOLOTYPE / Parena (Crossoglossa) / sciakyi sp. nov. / des. Shi H.L. 2022" [red label] < Figs 6D , 8A , 11 γ, 14H, 14K>. Diagnostic characters . Dorsum pale yellow, elytra with large median black patch; antennomeres 1 to base of 4 yellow, apical antennomeres black; tibiae yellowish brown except apex dark brown; pronotum strongly transverse; elytra striae not incised, replaced by rows of fine punctures; disc shallowly depressed near middle of intervals 3 to 6; sutural angles simple, without pointed denticles ( Fig. 14H ); female abdominal sternite VII with apical margin straight at middle ( Fig. 8A ). Comparisons . P. sciakyi sp. n. is the only known species in the subgenus Crossoglossa which has a black patch on elytra. Besides the conspicuous large patch, the new species is also different from all other species of the P. testacea species group by: (1) elytral sutural angles not at all pointed, without denticles or spines; (2) pronotum much wider (PW/PL 1.82) than other species (PW/PL 1.60–1.71); (3) elytra microsculpture stronger than in other species. Description . Body length 11.3 mm . Body wide and stout, elytra subconvex. Color. Head yellowish brown, slightly darker than pronotum, pronotum pale yellow; antennomeres 1 to 3 yellowish brown, apex of 2 and 3 slightly darker, antennomere 4 gradually darkened from brown base to black apex, remaining antennomeres black, apex of antennomere 11 yellow; apex and inner margins of mandibles black; apex of laciniae and galea black; terminal labial palpomere black except apex, terminal and penultimate maxillary palpomeres black except apex. Elytra with margins pale yellow, disc with a conspicuous trapezoidal black patch, extended from basal pore basally to apical pore on interval 3 apically, extended to interval 6 near humerus and to interval 8 on outer apical angle. Scutellum yellow. Tibiae yellowish brown, apex dark brown; tarsomeres black; claws yellow. Venter of head reddish brown; metasternum and metaepisterna black; remaining parts of venter pale yellow. Head without microsculpture, vertex and frons with fine punctures; eyes large and strongly prominent; tempora very short, abruptly narrowed behind eyes, length of tempora plus neck-constriction slightly less than one-third of eyes' diameter; postgenae with a pair of long suborbital setae. Antennae barely reaching pronotum base. Mentum without median seta, lateral lobes extremely large, inner margins nearly straight, outer and apical margins widely rounded, epilobes very narrow; submentum with two setae on each side. Pronotum strongly transverse, PW/PL = 1.82, distinctly wider than head, PW/HW = 1.26; widest at anterior third; lateral margin largely rounded, very weakly sinuate before posterior angles; posterior angles rounded, obtuse; anterior margin slightly curved inward at middle; anterior angles widely rounded. Disc slightly convex, without microsculpture, with very fine and sparse punctures; lateral explanations very wide. Elytra with isodiametric microsculpture, very faint near base, fine but distinct in other regions. Striae well defined, not incised, replaced by rows of very fine punctures; intervals completely flat, with punctures much sparser than in striae; disc shallowly depressed near middle of intervals 3 to 6, depressions subtriangular; lateral sides slightly depressed near anterior third. Elytral basal pore present on base of stria 1; interval 3 with three discal pores: first one on level of scutellar apex, adjacent to stria 3, second one on basal two-fifth, adjacent to stria 3, third one on apical twelfth, adjacent to stria 2; interval 9 with 27 umbilicular pores.Apical truncation distinct, nearly straight; outer apical angles completely rounded; sutural angles not pointed, without denticles. Venter . Metasternum with short setae behind mesocoxae; abdominal sternite III to VI with long setae medially; in female, apex of abdominal sternite VII straight, with two long setae on each side ( Fig. 8A ). Female genitalia . Gonocoxite II of ovipositor dichotomous, outer branch slightly wider than inner branch, similar in length, each branch with two long ensiform setae on apex ( Fig. 11 γ). Male unknown. FIGURE 25 . Habitus of Parena ( Crossoglossa ) sciakyi sp. n. , Holotype. Scale bar = 2 mm. Distribution ( Map 4 , orange). Only known by the holotype from the Solomon Islands . Etymology . The new species is named for Dr. Riccardo Sciaky (Milano), who kindly provided several important specimens of Parena under his care for the present study, including this new species.