Hylaeus (Hylaeus) rozenius, Dathe, 2015

Dathe, Holger H., 2015, Studies on the systematics and taxonomy of the genus Hylaeus F. (10) New descriptions and records of Asian Hylaeus species (Hymenoptera: Anthophila, Colletidae), Beiträge Zur Entomologie = Contributions to Entomology 65 (2), pp. 223-238 : 230-231

Hylaeus (Hylaeus) rozenius spec. nov.

Figures 13–18 , 30

Diagnosis: Compared to the related species H. maoxianus and H. ascheri spec. nov., H. rozenius spec. nov. is distinguished primarily by characters of the head, the propodeum and male terminalia. Special character states exist in the complex of supraclypeal area and frons, by which this species can be immediately recognised.

Description: Male. TL 4.7–5.1 (4.89) mm, WL 3.9–4.0 (3.97) mm.

Head. Proportions HL:HW 0.91, UHW:LHW 1.70, outline transverse trapezoid. Scapi black, elongate, slen- der conoid, barely wider than flagella width, SL:SW 2.64; flagella long, black, yellow below, segments slightly nodular. Mask ivory white, side patches expanded to upper margin of scapi bases, contracted towards orbits; supraclypeal area black. Foveae faciales absent. Clypeus CL:CW 1.34, finely vertically striate, silkily shiny, with scattered shallow punctation at anterior margin. Supraclypeal area striate below, with moderate punctation above, lateral margins sharp, additionally the upper half is split as by a deep medial furrow, with abrupt right angled transition to the frons ( Fig. 14 ). Frons and vertex with subcontiguous, strong punctation, on the frons arranged in curved rows; interspaces shiny; vertex with moderately dense erect pilosity. Genae normal, with elongated punctation; occiput rounded; malae narrow. Labrum and the bifid mandibles black.

Mesosoma long-oval, rounded; pilosity conspicuous, thorax and propodeum covered with protruding long white hairs, dorsally somewhat shorter. Coloration black, pronotum black, calli with white spot; tegulae horn brown. Pronotum narrow, laterally somewhat expanded, anterior margin edged, dorsolateral angles blunt. Mesonotum and scutellum finely shagreen, silkily shiny, punctation strong, sparse; metanotum matt, finely punctate; mesopleurae with similar but somewhat more dense punctation than mesonotum, anterior margin rounded. Legs black, white are anterior surface of foretibiae, base of other tibiae and proximal parts of basitarsi, other tarsi partly brownish; wings slightly brown, venation brown. Propodeum totally rounded, its surface finely wrinkled-striate, matt; basal area indistinctly defined by a row of fine pits, at its base with irregular longitudinal wrinkles which merge caudally; terminal area not delimited, propodeal furrow deep, margined.

Metasoma slender spindle-shaped, coloration black. T1 smooth and shiny, punctation moderate, sparse; surface pits with short erect setae; T2 and following terga shagreen and somewhat more finely and densely punctate; lateral parts of terga without fringes. Terminalia ( Fig. 30 ): genital capsule compact, long-oval, with enlarged gonobase and gonocoxites, gonoforcipes short and pointed; penis valves (in dorsal view) basolaterally constricted, arrow-shaped; S7 and S8 similar to H. ascheri spec. nov. but deviating in detail: S8 with apical lobus preapically constricted, ending in smaller lobes; S7 with proximal and distal lobes more expanded.

Female. TL 4.8–5.2 (5.00) mm, WL 4.0–4.4 (4.15) mm.

Head. Proportions HL:HW 0.96, UHW:LHW 1.52, outline trapezoid. Scapi black, flagella short, black, undersides brown. Face with white to yellowish-white side spots, filling paraocular area nearly up to scapus bases. Foveae faciales long, reaching upper compound eye border. Clypeus CL:CW 1.24, longitudinally striate, matt,

16– 18 Paratypus female. – Scale 0.5 mm.

without punctation; supraclypeal area separated from clypeus by fine seam, lower part with a similar structure, upper part with deep middle furrow that widens up to a small pit at the transition to frons (where pollen is regularly found), surface laterally punctate, transition to the frons steep but not as right angled as in the male ( Fig. 17 ). Frons and vertex with subcontiguous, strong punctation. Genae regular, in profile sloping below; occiput rounded; malae narrow. Labrum and the bifid mandibles black.

Mesosoma rounded oval, somewhat flattened; pilosity conspicuous, thorax and propodeum covered with protruding long white hairs, dorsally somewhat shorter. Coloration black, pronotum and tegulae black, calli with yellow spot. Pronotum slightly expanded anteriorly, anterior margin edged, dorsolateral angles blunt. Mesonotum and scutellum finely shagreen, silkily shiny, punctation strong, close; metanotum matt, finely punctate; mesopleurae with similar but somewhat more dense punctation than mesonotum, anterior margin rounded. Legs black, yellow are only bases of tibiae; wings slightly brown, venation brown. Propodeum rounded, its surface finely wrinkled-striate, matt; basal area indis- tinctly defined by a furrow, basally with meshes and irregular longitudinal wrinkles which merge caudally; terminal area not delimited, propodeal furrow deep, edged laterally.

Metasoma slender spindle-shaped, coloration black. T1 smooth and shiny, punctation moderate, sparse to scattered; following terga finely shagreen, with shallow punctation; terga without fringes; fringe of last sternum bright.

Types: 3 ♂, 4 ♀.

Holotypus: ♂ CHINA. Sichuan Province : Lushan Mt. above Qionghai Lake , pine forest, 27°44.351N 102°20.517E, 6976 ft, 05.06.2011, leg. J.S. Ascher, L. Ding, Z. Niu & J.G. Rozen. – In coll. IZCAS Beijing .

Paratypes: 2 ♂, 4♀ CHINA, same collecting data as holotypus. – In coll. IZCAS Beijing, AMNH New York, SDEI Müncheberg .

Derivatio nominis: The new species is dedicated to one of its collectors, the meritorious hymenopterist Dr Jerome G. Rozen (Washington).

Figures

Figs 13–18: Hylaeus (Hylaeus) rozenius spec. nov.: head in frontal view; supraclypeal area in higher magnification; surface structure of propodeum and basal terga in dorsal view. – 13–15 Holotypus male.

Figs 27–30: Male terminalia: metasomal sterna 7 and 8 (S7 left ventral view, right dorsal view), genital capsule. – 27H. (Hylaeus) oliviae spec. nov. – 28 H. (Hylaeus) ascheri spec. nov.– 29 H. (Hylaeus) maoxianus spec. nov. – 30 H. (Hylaeus) rozenius spec. nov. – Scale 0.2 mm.