Parosus rossii, 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 : 122-125

Parosus rossii sp. nov. Figs 111-114, 137, 140

TYPE MATERIAL: HOLOTYPE (3), “ ECUADOR, Cotopaxi [Prov.], Bosque Integral Otonga , 15-Sep-2007, 1961m, Ex: Fumigación F6, S 00°25' 16.5", W 079°00' 09", leg. A.C.Proaño, C.&A. Barragán ” ( CNCI) . – PARATYPES (99), same data as holotype ( HNHM, 27, AMNH, 2, FSCA, 2, ISNB, 13, 3, NHMW, 2, SEMC, 4, USNM, 2, ZMHB, 4, CNCI, 5, QCAZ, 6, ICNC, 1), Cotopaxi Prov., Bosque Integral Otonga , 1.VI.2007, 1975m, ex: Fumigación F 1, S 00°25' 16.6", W 79°00' 20.4", leg. A.C. Proaño, C.&A. Barragán, ( HNHM, 17, AMNH, 2, BMNH, 13, 1, MNHP, 2, SMNS, 4, USNM, 2, MHNG, 2, QCAZ, 4), Cotopaxi Prov., Canton Sigchos, Las Pampas, Bosque Integral Otonga, 2.VI.2007, leg. C. Proaño & A. Barragán, Laboulbeniales n. 3152 and 3153 Walter Rossi ( FMNH, 2), Cotopaxi Prov., Canton Sigchos, Las Pampas, Bosque Integral Otonga, 15.IX.2007, leg. C. Proaño & A. Barragán, Laboulbeniales n. 3378 Walter Rossi ( FMNH, 2) .

DESCRIPTION: Habitus as in Fig. 137. Measurements (n=7): HW = 0.71 (0.65- 0.76); TW = 0.71 (0.65-0.76); PW = 0.67 (0.62-0.72); SW = 0.66 (0.62-0.70); MW = 0.82 (0.77-0.87); AW = 0.64 (0.61-0.68); HL = 0.56 (0.50-0.60); EL = 0.14 (0.12-0.15); FL = 0.11 (0.10-0.11); TL = 0.23 (0.21-0.25); PL = 0.47 (0.42-0.50); SL = 0.74 (0.71- 0.77); SC = 0.73 (0.70-0.76); FB = 1.82 (1.67-1.94); BL = 3.24 (2.73-3.72) mm. Body 'bicoloured', but with medium brown elytra. Head very dark brown to black (supraantennal prominences only slightly lighter), pronotum strongly reddish medium brown, elytra uniformly dark brown to blackish with gently reddish overtone, abdominal base in varying extent orangeish till tergite V with posterior parts, rest of abdomen dark brown. Legs, mouthparts and antennae reddish medium brown the exception of the FIGS 135-137

Habitus of new Parosus species. P. minutus sp. n. (135), P. portobelo sp. n. (136), P. rossii sp. n. (137).

bases of antennomeres very slightly darker. Pubescence medium short and medium dense equally on the forebody, except frons, where slightly longer and sparse, abdomen with much longer and more sparse setae.

Head and pronotum. Mid-antennal articles about as long as wide (antennomere 6 length:width = 0.068: 0.068 mm). Clypeus (Fig. 111) trapezoid, ratio of longitudinal distance of supraantennal prominence tip from eyefront to the same from clypeal front = 0.41-0.45. Infraocular ridge (Fig. 114) conspicuous but rather fine, weakly continues in a short keel after the posterior edge of the eye. Temple rather straight, most curved at the posterior 2/3 (and there appear as rather angled), eye strongly bulging. Pronotum (Fig. 112) with maximum width 1.84 base width, sides curved mostly in the anterior half, but turning into the almost straight posterior half in an unbroken arch; anterior pronotal angles rather sharp. Clypeus and supraantennal ridges very shiny, with a few small, scattered punctures only, contrasting to the mostly strongly punctate vertex. Clypeus very slightly elevated, frontoclypeal groove almost indistinct, only appear as borderline to the more strongly punctured area. Posterior half of vertex very gently impressed, with a rather slight longitudinal loosening of the punctation. Posterior part of pronotal midline an elevated and shiny stripe, anteriorly continuing into a longitudinal depression with some scabrous sculpture. Along sides of midline the pronotal disc gently but broadly depressed (on both sides). Head with 28-30 'longitudinal' puncture lines, pronotum with 26-30 'longitudinal' puncture lines, on pronotum very slightly smaller punctures compared to those on head, punctation loosened in the triangle of the supraantennal prominences and the mid-vertex.

Elytra and abdomen. Elytra (Fig. 113) slightly dilating posteriorly, with two small, elongate impressions behind scutellum, scabrous sculptured. Medially serrate fringe present on hind margin of tergite VII. Elytral punctation not umbilicate, same size as on pronotum, interspaces about 1/3-1/2 of puncture diameters. Bases of tergites (posterior to basal ridges) with fine transversal coriaceous microsculpture, segments with medium fine, scattered punctures. Aedeagus as in Fig. 140.

ETYMOLOGY: The species is named after Dr. Walter Rossi, who while studying Laboulbeniales (Fungi) in Central and South America, collected very valuable material of Parosus that greatly added to the knowledge of the genus. This is the species referred to as Parosus sp. nov. in Rossi (2010), in the description of Dimorphomyces carolinae Rossi, 2010, a parasitic fungus.

COMPARATIVE NOTES: Of the similarly large and 'bicoloured' species (P. hilaris, P. taliaferroae , P. bicoloratus ) this species can be distinguished by not having a delimited dark cross-stripe across the abdomen (as opposed to P. hilaris and P. taliaferroae ) but possessing a medially serrate fringe on the hind margin of tergite VII with digitiform processes (lacked by P. taliaferroe and P. bicoloratus ).

DISTRIBUTION: The species is known only from the type locality in Ecuador

(Cotopaxi Prov.).

BIONOMICS: All the known material was collected by fogging with insecticide. FIGS 138-145

Aedeagi, frontalviews. P. newtoni sp. n. (138), P. portobelo sp. n. (139), P. rossii sp. n. (140), P. simplex sp. n. (141), P. skalitzkyi Bernhauer (142), P. taliaferroae sp. n. (143), P. thayerae sp. n. (144), P. unicoloratus sp. n. (145). Scale bar = 0.09 mm for 139, 0.10 mm for 138, 142, 144, 0.12 mm for 141, 144, 0.13 mm for 140, 145.