Pselaphomorphus parki Vásquez-Vélez, 2016

Vásquez-Vélez, Laura M., 2016, Revision of the genus Pselaphomorphus Motschulsky, 1855 (Staphylinidae, Pselaphinae: Jubini), Zootaxa 4107 (1), pp. 1-48 : 35-37

Pselaphomorphus parki Vásquez-Vélez n. sp.

( Fig. 26 )

Diagnosis. Pselaphomorphus parki is characterized by the combination of small body (less than 2.0 mm), yellow coloration and even pilosity, triangular head and the antennae with five-segmented clava. This species can be differentianted from P. chandleri by its even pilosity, the basal ridge of the elytra normal, and the humeral teeth absent. Additionally, in P. parki the male genitalia are apically asymmetrical and not constricted dorso-ventrally in lateral view.

Description. Male. Body length 1.7 mm. Body flattened dorsally, yellowish to light brown, with clear even pilosity. Head triangular (length 0.45 mm, width 0.3 mm), base of antennal tubercle short, not longer than diameter of eye. Longitudinal sulcus wider between eyes, spindle-shaped. Eyes round (diameter 0.1 mm). Antennal length 1.1 mm. Antennomere length as follows: 1 (0.1 mm), 2 (0.06 mm), 3 to 5(0.04 mm), 6 (0.02 mm), 7 to 10 (0.08 mm), and 11 (0.2 mm), clava conspicuous. Maxillary palpi yellowish with short and even pilosity. Pronotum quadrate (length and width 0.4 mm), lateral lobes trapezoidal, basal angle round. Pronotal disc oval, longitudinal, and transverse sulci wider toward edges. Elytra length 0.6 mm, width 0.7 mm. Humeral teeth present. Sutural fovea transversely elongate, basal discal fovea round, discal depression ended before limit of humeral teeth. Sutural stria present. Abdominal segments I–V dorsally with length as follows: 0.2, 0.06, 0.06, 0.1, 0.06 (mm). Ventrally, segment V distally round, segment VI with round depression, pygidial suture present. Genitalia. Phallobase regular, globose, bilobed and symmetrical. Median lobe short, apically asymmetrical, with transverse lobe, medially narrowed; ventrally with membranous area. Accessory lobes absent ( Figs. 26 B, 26C).

Type material. Holotype (male): “ Costa Rica, Heredia 16 km SSE La Virgen, Braulio Carrillo National Park 10°16’N, 84°05’W. 1050–1150 m. IV-20-2001. INBio-OET-ALAS transect” ( FMNH). Paratypes (45 males, 4 females): Costa Rica: 17 males, same information as the holotype (16 UNHC, 1 LSAM); 13 males, 2 females, Heredia, 11 km SE La Virgen, 450–550 m, 10°20’N, 84°04’W, II-20 / VI-20-2003, INBio-OET-ALAS transect ( UNHC); 8 males, Heredia, 9 km NE Vara Blanca, 1450–1550 m, 10°14’N, 84°07’W, III-8 / IV-17-2005, INBio- OET-ALAS transect ( UNHC); 2 females, Heredia, 7 km NE San Isidro, Rio Para Blanco, P. N. Braulio Carrillo, 1740 m, 10.050°N, 84.018°W, III-24-2002, leaf litter, trail cut, D.S. Chandler ( UNHC); 1 male, Puntarenas, Monte Verde, 1400 m, V-7-1989, berlese, fruit fall and litter, J. Ashe, R. Brooks, R. Leschen ( KSEM); 1 male, Puntarenas–Guanacaste border, Monte Verde, 1760 m, V-10-1989, flight intercept trap, J. Ashe, R. Brooks, R. Leschen ( KSEM); 1 male, Alajuela E.B. San Ramon, R.B. San Ramon, 27 km N & 8 km W, San Ramon, 900 m, 10°13’30”N, 84°35’30”W, VI-29 / VII-6-1999, wet premontane forest litter, R. Anderson ( KSEM); 2 males, San Jose, km 113 Panammerican Highway, 23 km N San Isidro, 2000 m, 9°28’0”N, 83°42’20”W, VI-20-1997, berlese forest litter, R. Anderson ( KSEM); 2 males, Heredia, La Selva, 3.2 km SE Puerto Viejo, 100 m, II-17 / III17-1992, flight intercept trap, W. Bell ( KSEM).

Etymology. Patronymic, named after the Pselaphinae taxonomist and morphologist Orlando Park. Knowledge on Neotropical fauna of these beetles owes much to his contributions.

Figures

FIGURE 26. Pselaphomorphus parki n. sp. A. Dorsal habitus. B. Aedeagus dorsal view. C. Aedeagus lateral view.