Parosus longicornis, Makranczy & H-, 2014

Makranczy, György, 2014, Review of the genus Parosus Sharp, 1887 (Coleoptera: Staphylinidae, Oxytelinae), Revue suisse de Zoologie 121 (1), pp. 77-133 : 108-109

Parosus longicornis sp. nov. Figs 22, 48, 78-81, 92

TYPE MATERIAL: HOLOTYPE (3), “ PERU: Junín [Dept.]: San Emiliano de Cachingareni , approx. 55km SE Satipo [11°38'S, 74°18'W], 1000m, May 20-21,1972, [leg.] R. T. & J. C. Schuh ” ( AMNH).

DESCRIPTION: Forebody as in Fig. 48. Measurements (n=1): HW = 0.90; TW = 0.93; PW = 0.81; SW = 0.73; MW = 0.86; AW = 0.76; HL = 0.67; EL = 0.17; FL = 0.14; TL = 0.29; PL = 0.52; SL = 0.88; SC = 0.84; FB = 2.20; BL = 4.00 mm. Body 'unicoloured'. Head and pronotum blackish dark brown (only supraantennal prominences lighter brown), elytra blackish dark brown except shoulder area (not delimited) lighter, darkening towards apex. Abdomen dark brown, darkening towards apex. Legs, mouthparts and antennae medium brown, basal antennomeres lighter (first light brown). Pubescence medium sparse and on elytra rather short, on other body parts longer.

Head and pronotum. Mid-antennal articles elongate (antennomere 6 length: width = 0.130: 0.080 mm), tip of antennomeres conical. Clypeus (Fig. 78) basally broad trapezoid, ratio of longitudinal distance of supraantennal prominence tip from eyefront to the same from clypeal front = 0.57. Infraocular ridge (Fig. 81) rather strong, ends in a small, shiny, triangular postocular process. Temple slightly dilating posteriorly, rounded. Pronotum (Fig. 79) with maximum width 1.86x base width, sides very weakly rounded (both anteriorly and posteriorly), anterior angles appearing sharp (dorsal view). Clypeal area covered by somewhat smaller, simple punctures, with large, shiny interspaces. Vertex extremely shallowly impressed. Posterior half of pronotal midline shiny and slightly elevated, with two impressed areas at its sides. At sides of pronotum with two slight concavities around middle. Supraantennal prominences shiny, without punctation. Head with about 30 'longitudinal' puncture lines, pronotum with about 26 'longitudinal' puncture lines, top of head without loosening of punctures, pronotal puncture sizes similar to those on head.

Elytra and abdomen. Elytra (Fig. 80) slightly dilating posteriorly, impressions behind scutellum rather shallow and longitudinally elongate. Medially serrate fringe present on hind margin of tergite VII. Elytral punctation not umbilicate, much finer than on head and pronotum, interspaces about 1/3-2/3 of puncture diameters. Bases of abdominal tergites (posterior to basal ridges) without apparent microsculpture, segments with more apparent punctation, small, not so scattered punctures. Aedeagus as in Fig. 92.

ETYMOLOGY: The species is named after its peculiarly long antennae.

COMPARATIVE NOTES: From the other similarly large 'unicoloured' species ( P. major , P. gigantulus , P. unicoloratus ) it differs not only by its very elongate antennae, but also by a distinctly punctured clypeus (the other species sometimes have a few tiny, scattered punctures, too).

DISTRIBUTION: The species is known from only one specimen, from Junín Dept. in the central part of Peru .

BIONOMICS: Unknown.

FIGS 88-95

Aedeagi, frontalviews. P. colombiensis sp. n. (88), P. gigantulus sp. n. (89), P. hermani sp. n. (90), P. hilaris Sharp (91), P. longicornis sp. n. (92), P. longipennis sp. n. (93), P. major sp. n. (94), P. minutus sp. n. (95). Scale bar = 0.08 mm for 95, 0.09 mm for 93, 0.13 mm for 88, 90-92, 0.15 mmfor 89, 0.2 mmfor 94.