Parosus colombiensis, 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 : 96-98

Parosus colombiensis sp. nov. Figs 46, 64-67, 88

TYPE MATERIAL: HOLOTYPE (3), “COLOM[BIA]: [Departamento del] Magd [alena], 7000’, San Lorenzo , 41 km S Sta. Marta [11°06'16"N, 74°04'04"W], V-1-1973, [leg.] Howden & Campbell” ( CNCI). – PARATYPE (1), COLOMBIA: Departamento del Magdalena, San Lorenzo , 41km S Santa Marta [2130m], 01.V.1973, leg. Howden & Campbell ( MHNG, 1) .

OTHER MATERIAL: ECUADOR, Napo, 2km S Oritoyacu , 22 km S Baeza, 1500 m, 4-5.III.1976, leg. J. M. Campbell ( CNCI, 1, specimen in bad condition) .

DESCRIPTION: Forebody as in Fig. 46. Measurements (n=2): HW = 0.71 (0.69- 0.72); TW = 0.69 (0.67-0.70); PW = 0.61 (0.60-0.62); SW = 0.66 (0.65-0.66); MW = 0.78 (0.77-0.78); AW = 0.67 (0.66-0.67); HL = 0.53 (0.52-0.53); EL = 0.15 (0.14-0.15); FL = 0.11 (0.11-0.12); TL = 0.21 (0.21-0.21); PL = 0.47 (0.46-0.47); SL = 0.79 (0.78- 0.79); SC = 0.79 (0.78-0.79); FB = 1.92 (1.88-1.95); BL = 3.41 (3.23-3.58) mm. Body 'unicoloured', but appendages contrastingly light coloured. Head and pronotum blackish dark brown (tips of supraantennal prominences appear lighter). Elytra dark brown (poorly delimited shoulder area lighter). Abdomen blackish dark brown (hind margin of tergites somewhat lighter). Legs, mouthparts and antennae yellow to light brown, but antennae slightly darkening from middle to penultimate antennomere. Pubescence rather short and sparse, a little shorter on elytra and longer on abdomen.

FIGS 49-51

Habitus of new Parosus species. P. campbelli sp. n. (49), P. gigantulus sp. n. (50), P. major sp. n. (51).

Head and pronotum. Mid-antennal articles about as long as wide (antennomere 6 length:width = 0.069: 0.070 mm). Clypeus (Fig. 64) broad trapezoid, ratio of longitudinal distance of supraantennal prominence tip from eyefront to the same from clypeal front = 0.65. Infraocular ridge (Fig. 67) rather strong anteriorly, but vanishing posteriorly, ending in a strong and shiny postocular process at posterior edge of eye. Temple rather straight anteriorly, most curved in middle (slightly angled). Pronotum (Fig. 65) with maximum width 1.65-1.67x base width, sides almost evenly rounded anteriorly, straight in posterior half, anterior angles rather sharp. Clypeus and supraantennal prominences unpunctured, shiny. Clypeal area poorly marked by a fine line and border of contrastingly punctured areas behind it. Middle of vertex with a more sparsely punctured, shiny, transversal area. Behind it vertex shallowly impressed. Anterior half of pronotal midline impressed, unpunctured, forms a posteriorly directed arrowhead shape. Posterior half as a slightly elevated, unpunctured, shiny stripe. Along its sides two longitudinal impressions. Pronotal sides with trace of concavity around middle. Head with 22-26 'longitudinal' puncture lines, pronotum with 18-22 'longitudinal' puncture lines, anterior half of mid-vertex with a few punctures, pronotal punctures about the same size as those on head.

Elytra and abdomen. Elytra (Fig. 66) dilating posteriorly, with two small, longitudinal impressions behind scutellum. Medially serrate fringe present on hind margin of tergite VII. Elytral punctation not umbilicate, size similar those on head and pronotum or somewhat smaller, interspaces about 2/3-1/1 of puncture diameters. Basal half of abdominal tergites (posterior to basal ridges) with transversal coriaceous microsculpture, at points scabrous, segments with some small punctures at base. Aedeagus as in Fig. 88.

ETYMOLOGY: The species is named after the country that the holotype comes from.

COMPARATIVE NOTES: A dark 'unicoloured', medium-sized species with flat head, bulging eyes and strongly developed postocular process. Of the 'unicoloured' species in this size range it can be distinguished from P. hermani and P. thayerae , because these two species have round, dorsally convex heads and their postocular processes are not so strongly developed. Also similar to the slightly smaller P. antillarum, where the head punctation is finer, there are more interspaces between punctures.

DISTRIBUTION: The species is known from specimens collected in Colombia and Ecuador, this suggests a wider distribution.

BIONOMICS: None of the specimens are associated with any bionomical information.