Pensus hirtus Halstead, 2020

Halstead, David G. H., 2020, New and little known Coleoptera (Silvanidae: Silvaninae) from Central and South America, Insecta Mundi 2020 (842), pp. 1-37 : 14-15

Pensus hirtus Halstead , new species

( Fig. 39–45 , 124 )

Description. This description is based on the type series of 3 males and 6 females. Length of body, 2.94–3.96 mm; length to breadth ratio (breath, maximum across elytra), 33.0–38.7:10.0; dark brown, glossy; head and pronotum slightly darker than elytra; dorsal pubescence, consisting of long suberect setae, obvious but may become slightly rubbed; ventral pubescence also easily seen; spaces between punctures smooth, without ocellate punctures.

Head. Breadth (across eyes) to length ratio, 11.94–14.63:10.00; punctures deep, mostly slightly larger than eye facets and each bearing one long, fine seta, interspaces smooth (glossy); temples very short, only slightly longer than an eye facet but easily seen ( Fig. 39, 40 , 124 ); eyes small, dorsally separated across head by 7.3–9.8× breadth; antennae about a third as long as body.

Pronotum. Length to breadth ratio 12.02–13.67:10.00, pronotum in males very slightly more elongate than in females; ratio of pronotal breadth across anterior angles to head breadth across temples 12:10; anterior angles moderately developed; disc slightly depressed each side on apical two thirds. more obvious depressions on basal third ( Fig. 39 ); puncturation on anterior region similar to that on head, becoming denser with larger punctures posteriorly; punctation between disc and sides of pronotum also dense with larger punctures.

Elytra. Length to greatest breadth ratio, 19.5–22.5:10.0; disc with 6 rows of punctures forming striae; lateral declivity with about 3 rows; long setae, as elsewhere, but arising from very small punctures on surface between rows of punctures ( Fig. 124 ).

Legs. In female simple; in male there are secondary sexual characters as follows: metatrochanter with minute spine near apex; metafemur with prominent ridge on proximal side (hardly visible in dorsal view); metatibia moderately curved, proximal side with series of transverse ridges, appearing as conspicuous row of spines along most of the dorsal and ventral margins of the ridge.

Male genitalia ( Fig. 43–45 ). Internal sac with long armature (as in other known Pensus spp. see Halstead 1973, Fig. 80 , not illustrated here); parameres subparallel to apical third then slightly curved out on distal margin before tapering to apex, a number of minute setae present along the former, apical margin bears long setae, 3 in only specimen dissected ( Fig. 42–43 ); median lobe tapering to broad apical region ( Fig. 44 ); sternite 8 with each part narrowed to apex and bearing bunch of setae, sternite 9 with apical margin fringed with short setae ( Fig. 45 ).

Materials examined. Holotype male “Jabali, S. slope of Sierra de las Minas (N. of Cabanas) / Dept Zacapa VII: 28: 48 GUAT. Elev. 5500ft. / Under bark of log / CNHM Guatemala Zool. Exped. (1948) R. D. Mitchell leg.” ( CAS). The holotype was dissected, and the genitalia illustrated. It has lost much of the long pubescence.

Paratypes. (8) Two males and four females, “ GUATEMALA: Zacapa Dept.: Santa Cruz Marble Quarry rd NeE of Teculutan 1539m 17 May 2006. N 15° 04.454′ W 89° 41.074′ R. S. Zack collector” ( WSU, FSCA). 1 female, “ GUATEMALA: Dept. Zacapa, Sierra de los Minas, “El Naranjo” S. slope below San Lorenzo Mine, vic 15.07329, −89.68481, 1600–1700m 21-24-v-2010, P. Skelley, G. Steck & B. Sutton, oak forest” ( FSCA). 1 female, “GUA- TEMALA: Zacapa, Sierra de las Minas, 8km NW San Lorenzo, 6-vi-2007 cloud forest. B. Sutton, Monzon & Camposeco” ( FSCA).

Figures

Figures 39–45. Pensus hirtus, new species. 39) Habitus. 40) Part of head enlarged to show, eye, temple, part of puncturation and pubescence. 41) Antenna, enlarged. 42–45) Male genitalia and associated sternites. 42) Genitalia without internal sac. 43) Paramere, enlarged. 44) Median lobe, enlarged. 45) Sternites 8–9. Scale lines for Figure 39 = 1.0 mm, for Figures 42 and 45 = 0.2 mm.

Figures 123–124. Color habitus photographs.123) Synobius lobatus (Grouvelle). 124) Pensus hirtus, new species.

Figures 80–84. Coccidotrophus platyops, new species, male holotype. 80) Habitus.