Parosus unicoloratus, 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 : 131-132

Parosus unicoloratus sp. nov. Figs 19-21, 29, 126-128, 134, 145

TYPE MATERIAL: HOLOTYPE (3), “ BRAZIL, Est. Biol. Boracea [23°38'S, 45°52'W], Salesopolis, SP [= Estado de São Paulo], XII-17-26-1969, [leg.] J. M. & B. A. Campbell ” ( CNCI). – PARATYPE (1), BRAZIL, Estado de São Paulo, Salesopolis, Estação Biológica de Boracéia , 17-26.XII.1969, leg. J. M. & B. A. Campbell ( MHNG, 1♀) .

DESCRIPTION: Forebody as in Fig. 134. Measurements (n=2): HW = 0.91 (0.90- 0.91); TW = 0.91 (0.89-0.93); PW = 0.82 (0.80-0.83); SW = 0.79 (0.77-0.81); MW = 0.96 (0.95-0.96); AW = 0.78 (0.76-0.80); HL = 0.72 (0.71-0.72); EL = 0.16 (0.15-0.16); FL = 0.13 (0.12-0.13); TL = 0.31 (0.30-0.32); PL = 0.57 (0.56-0.58); SL = 0.92 (0.91- 0.93); SC = 0.91 (0.90-0.91); FB = 2.39 (2.35-2.43); BL = 4.34 (4.27-4.41) mm. Body 'unicoloured'. Head, pronotum and elytra reddish medium brown (clypeal region, supraantennal prominences, pronotum and the shoulder area appear somewhat lighter), mediad supraantennal prominences with two little darker spots. Infraocular ridges dark brown. Abdomen medium to light brown, posterior margins of tergites lighter, yellowish. Legs, mouthparts and antennae medium brown. Pubescence short and medium dense, on abdomen much longer and somewhat more sparse.

Head and pronotum. Mid-antennal articles very slightly elongate (antennomere 6 length:width = 0.088: 0.082 mm). Clypeus (Fig. 126) trapezoid, ratio of longitudinal distance of supraantennal prominence tip from eyefront to the same from clypeal front = 0.50-0.54. Infraocular ridge (Fig. 128) strong, continuing in an anteriorly strong but posteriorly vanishing keel long behind posterior edge of eye. Temple staying almost straight (slightly dilating) long behind eye, but curving inwards at posterior 1/3-1/4, occasionally rather angled, eye strongly bulging. Pronotum (Fig. 126) with maximum width 1.71-1.76x base width, sides curved all the way, most strongly anteriorly, posteriorly only slightly, anterior angles sharp. Clypeus and supraantennal ridges almost unpunctate (only a few small punctures), shiny. Frontoclypeal impression only slightly visible, apparent as a fine arcuate line between unpunctate clypeus and punctate vertex. Vertex a little elevated in anterior half of midline, apparent as a shinier spot with confluent puncture interspaces. Middle of vertex posteriorly slightly impressed. Posterior part of pronotal midline as an elevated and shiny stripe. An area anterior to and two longitudinal stripes along the posterior midline impressed, with more sparse punctation mixed with scabrous microsculpture in them. Pronotal sides with two slight oblique depressions around middle. Head with 32-34 'longitudinal' puncture lines, pronotum with 22-24 'longitudinal' puncture lines, from anterior vertex to middle a small area loosely punctured.

Elytra and abdomen. Elytra (Fig. 127) slightly dilating posteriorly, with two small, elongate impressions behind scutellum and anterior half of elytral disc also with extremely gentle oblique depressions. Medially serrate fringe (Fig. 29) present on hind margin of tergite VII. Punctation similarly sized on head, pronotum and elytra, but elytral punctation not umbilicate, interspaces about 1/3-1/2 of puncture diameters. Bases of tergites (posterior to basal ridges) very finely microsculptured (transversal coriaceous), segments with very fine, scattered punctation. Aedeagus as in Fig. 145.

ETYMOLOGY: The name refers to the uniformly (light) coloured body of the known specimens.

COMPARATIVE NOTES: Of the similarly large 'unicoloured' species ( P. longicornis , P. major , P. gigantulus ), this one is easily distinguished by the lighter (reddishbrownish) body colour. It has moderately elongate antennae, a rather flat head with slight depression at the vertex. Contrary to the most similar P. gigantulus , it has much finer punctation on the head and pronotum and a brownish body colour with lighter shoulders.

DISTRIBUTION: The species is known from one locality in Brazil (Estado de São

Paulo), and is probably inhabitant of atlantic forest remnants.

BIONOMICS: Unknown.