Tetralonioidella guomenensis Niu & Zhu, 2017

Niu, Zeqing, Yuan, Feng & Zhu, Chaodong, 2017, Taxonomic study of the genus Tetralonioidella Strand from China (Hymenoptera: Apidae: Melectini), Zoological Systematics 42 (4), pp. 418-445 : 429-431

Tetralonioidella guomenensis Niu & Zhu , sp. nov. ( Figs 9–10 )

Diagnosis. The new species has the mesosomal terga with yellowish-orange pubescence, similar to T. pendleburyi , but all metasomal terga uniformly covered with thin and short yellowish-brown hairs, intermixed with black hairs.

Description. Male. BL 9.0 mm ( Fig. 9a ); head broader than long, HW: HL = 63: 47 ( Fig. 9b ); gena distinctly narrower than eye, GW: EW = 7: 17; width of metasoma slightly broader than the width between the tegulae, MtW: MsW = 74: 70. Clypeus broader than long ( Fig. 9b ); apical margin of labrum nearly straight ( Fig. 9c ); antenna short, reaching front margin of tegula, scape conically broadened, as long as F1 to F3 together, flagellomere equal in breadth, F1 longer than broad, nearly 1.8 times as long as broad, F2 longer than broad, nearly twice as long as broad, F3 equal in length with F4, about 1.25 times as long as broad, F5–F10 equal in length, nearly as long as broad, F11 rounded apically, equal in length with F2, about twice as long as broad ( Fig. 9d ); fore wing with distinct numerous papillae apically ( Fig. 10a ); scutellar spines short and broad, rounded apically, barely visible between pubescence; inner ramus of hind tarsal claw axe-shaped, arolium present ( Fig. 10b ); ventral surface of apical part of S7 with dense setae laterally, median part slightly convex with sparse setae ( Fig. 10c ); apical margin of median process of S8 distinctly concave ( Fig. 10d ); genitalia as illustrated in Fig. 10e (in dorsal view) and Fig. 10f (in lateral view), basal part of gonostylus with broad blunt triangular process dorsally, and the process with a few long hairs along dorsal margin ( Fig. 10f ). Clypeus black ( Fig. 9b ); middle part of mandible dark reddish-brown, basal and apical part of mandible blackish; labrum black ( Fig. 9c ); antenna dark black beneath ( Fig. 9d ); tegula yellowish-brown ( Fig. 9e ); all legs dark reddish-brown; hind tarsal claw dark reddish-brown apically ( Fig. 10b ). Scutum pubescence yellowish-orange ( Figs 9a, e ); clypeus, supraclypeal area and periphery of antennal socket covered with white hairs, paraocular area, vertex, genal area, scutum, scutellum, metanotum and episternum covered with dense and long yellowish-orange hairs ( Figs 9a–b, d–e ); all metasomal terga uniformly covered with thin and short yellowish-brown hairs, intermixed with black hairs ( Fig. 9f ).

Female. Unknown.

Material examined. Holotype. ♂, China, Yunnan, Xishuangbanna, Mt. Guomen (101º35′E 24º52′N), 13.V.2013, coll. Pia Oremek.

Distribution. China (Yunnan).

Etymology. The type location Mt. Guomen (Yunnan, China) is given as the specific name.

Figures

Figure 9. Tetralonioidella guomenensis Niu & Zhu, sp. nov., male. a. Body, lateral view. b. Head, frontal view. c. Labrum, frontal view. d. Antenna. e. Mesosoma, dorsal view. f. Metasoma, dorsal view. Scale bars=1mm.

Figure 10. Tetralonioidella guomenensis Niu & Zhu, sp. nov., male. a. Fore wing, showing the papillae. b. Claw, showing the inner ramus. c. S7, ventral view. d. S8, ventral view. e. Genitalia, dorsal view. f. Genitalia, lateral view. Scale bars: a, e, f =1mm; b, c, d=0.5mm.