Parosus newtoni, 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 : 116-120

Parosus newtoni sp. nov. Figs 97-100, 132, 138

TYPE MATERIAL: HOLOTYPE (3), “ PANAMA, [Prov.] Bocas d. Toro, Fortuna / Chiriquí Grande road, 8°47'N, 82°11'W, 800m, 14-16.VII.1987, [leg.] D. M. Olson (#566), premontane rain forest, sifting litter, Field Museum N. H., David M. Olson, Staphylinidae species #73” ( FMNH) . – PARATYPES (4), PANAMA, Prov. Bocas del Toro, Fortuna / Chiriquí Grande road, 1050m, 8°47'N, 82°12'W, 12-14.VII.1987, leg. D. M. Olson (#523), premontane rain forest, sifting litter, Field Museum N. H., David M. Olson, Staphylinidae species #73 ( FMNH, 1,

FIGS 115-122

(115-118) Parosussimplex sp. n.; head (115), pronotum (116), elytron (117), sideofhead (118). (119-122) P. taliaferroae sp. n.; head (119), pronotum (120), elytron (121), sideofhead (122). All SEM, dorsal views. Scale bar = 0.15 mm for 118, 122, 0.23 mm for 119-121, 0.25 mm for 115-117.

MHNG, 1), [Prov. Panamá,] Cerro Campana [8°41'15"N, 79°55'19"W], 6.VII.1974, leg. C.W. & L. O’Brien ( FSCA, 1) , [Prov. Panamá,] Cerro Campana , 01.VIII.1970, leg. J. M. Campbell ( CNCI, 1).

DESCRIPTION: Forebody as in Fig. 132. Measurements (n=5): HW = 0.78 (0.74- 0.84); TW = 0.80 (0.75-0.86); PW = 0.65 (0.62-0.69); SW = 0.63 (0.59-0.67); MW = 0.78 (0.75-0.84); AW = 0.63 (0.61-0.66); HL = 0.55 (0.50-0.59); EL = N/A; FL = 0.13 (0.12-0.14); TL = 0.25 (0.24-0.27); PL = 0.46 (0.44-0.48); SL = 0.68 (0.64-0.71); SC = 0.66 (0.62-0.69); FB = 1.78 (1.71-1.86); BL = 3.07 (2.97-3.30) mm. [Holotype teneral, so colour description is based on paratype from Cerro Campana (deposited in CNCI)]. Body 'bicoloured'. Head reddish dark brown (front of clypeal region and supraantennal prominences appear much lighter, yellowish, infraocular ridge blackish), pronotum yellow to light brown, elytra medium brown except shoulder area (not delimited) lighter, darkening towards apex. Abdomen yellow to light brown, darkening towards apex. Legs, mouthparts and antennae yellow to light brown. Pubescence rather sparse with very fine hairs, abdomen with longer setation.

Head and pronotum. Mid-antennal articles moderately elongate (antennomere 6 length:width = 0.074: 0.060 mm). Clypeus (Fig. 98) basally broad trapezoid, ratio of longitudinal distance of supraantennal prominence tip from eyefront to the same from clypeal front = 0.40-0.53. Infraocular ridge (Fig. 100) fine, in an angle continuing into a triangular postocular process. Temple fully and very broadly curved, outline of eye fitting perfectly into this arch. Pronotum (Fig. 98) with maximum width 1.85x base width (anterior part very transverse), anteriorly sides weakly rounded, anterior angles appear sharp (dorsal view). Behind clypeal area with a shallow, transversal, slightly Vshaped impression, on posterior part of vertex a rather deep concavity. On pronotal disc anterior 1/4 of the midline longitudinally impressed, similar longitudinal (parallel) impressions from anterior 1/4 along posterior half of midline, not so shiny, but elevated. Obtuse concavities from sides of disc to sides of whole pronotum, sligtly posteriorly directed. Clypeal area and supraantennal prominences without punctation, shiny. Posterior half of pronotal midline elevated, but only parts of it rather shiny. Head with 30-32 'longitudinal' puncture lines, pronotum with about 24 'longitudinal' puncture lines, loosened punctation on anterior vertex, pronotum with somewhat smaller punctures than on head.

Elytra and abdomen. Elytra (Fig. 99) dilating posteriorly, impressions behind scutellum rather deep. Medially serrate fringe present on hind margin of tergite VII. Elytral punctation not umbilicate, a little finer than on head, interspaces about 3/4-1 of puncture diameters. Bases of tergites (posterior to basal ridges) without apparent microsculpture, segments with small, very scattered punctures. Aedeagus as in Fig. 138.

ETYMOLOGY: The species is named in honor of Dr. Alfred Newton of the Field Museum of Natural History (Chicago) who made an especially important contribution to the systematics of Oxytelinae.

COMPARATIVE NOTES: This species has a unique eye formation: the postocular process is so strongly developed that it forms a perfect arch with the eyes and the temples. Similar (but no so perfect) arch can be found in P. brasilianus (with much less FIGS 123-128

(123-125) Parosus thayerae sp. n.; head and pronotum (123), elytron (124), side of head (125). (126-128) P. unicoloratus sp. n.; head and pronotum (126), elytron (127), side of head (128). All SEM, dorsal views. Scale bar = 0.15 mm for 125, 0.25 mm for 123, 124, 128, 0.4 mm for 126, 127.

transverse pronotum anterior, see details under P. brasilianus ) and P. skalitzkyi (a 'unicoloured' species with tiny, scattered punctures on the elytra).

DISTRIBUTION: The species is known only from Panama (Prov. Bocas del Toro andProv. Panamá).

BIONOMICS: Specimens were collected by sifting litter in premontane rain forest.