Tetralonioidella tianmuensis 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 : 439-441

Tetralonioidella tianmuensis Niu & Zhu , sp. nov. ( Figs 18–19 )

Diagnosis. The new species can be distinguished from other species of Tetralonioidella by its unique shape of S8, apical margin of median process of S8 concave, and with a projection medially.

Description. Male, BL 9.5 mm ( Fig. 18a ); head broader than long, HW: HL=66: 50 ( Fig. 18b ); gena distinctly narrower than eye, GW: EW = 8: 16; width of metasoma slightly broader than the width between the tegulae, MtW: MsW = 82: 78. Clypeus broader than long ( Fig. 18b ); apical margin of labrum slightly concave ( Fig. 18c ); antenna short, reaching front margin of tegulae; scape conically broadened, as long as F1 to F3 together, flagellomere equal in breadth, F1 longer than broad, nearly 1.2 times as long as broad, F2 long than broad, nearly 1.4 times as long as broad, F3 equal in length with F1, about 1.2 times as long as broad, F4–F10 equal in length, nearly as long as broad, F11 rounded apically, equal in length with F2, about 1.4 times as long as broad ( Fig. 18d ); fore wing with distinct numerous papillae apically ( Fig. 19a ); scutellar spines short and broad, pointed apically, barely visible between pubescence; inner ramus of hind tarsal claw axe-shaped, arolium present ( Fig. 19b ); ventral surface of apical part of S7 with dense setae laterally, median part straight, with sparse setae ( Fig. 19c ); apical margin of median process of S8 slightly concave, with a projection medially ( Fig. 19d ); genitalia as illustrated in Fig. 19e (in dorsal view) and Fig. 19f (in lateral view), basal part of gonostylus with crescent-shaped process dorsally, and the process with dense long hairs along dorsal margin( Fig. 19f ). Clypeus black ( Fig. 18b ); mandible dark reddish-brown; labrum blackish-brown except apical part yellowish-brown ( Fig. 18c ); antenna dark blackish-brown beneath ( Fig. 18d ); tegula yellowish-brown ( Fig. 18e ); all legs dark reddish-brown; hind tarsal claw blackish-brown apically ( Fig. 19b ). Scutum pubescence yellowish-white ( Figs 18a, e ); clypeus, periphery of antennal socket, supraclypeal area, paraocular area and front surface of scape covered with sparse white hairs ( Fig. 18b ); vertex, genal area, scutum, scutellum, metanotum and episternum covered with dense and long yellowish-white hairs ( Figs 18a–b, e ); all metasomal terga uniformly covered with thin and short yellowish hairs, and the hairs on T3-T5 denser than that on T1–T2 ( Fig. 18f ).

Female. Unknown.

Material examined. Holotype. ♂, China, Zhejiang, Mt. Tianmu (30º24′N, 119º30′E), 2.IX.1947. Paratype. 1♂, same data as holotype .

Distribution. China (Zhejiang).

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

Figures

Figure 18. Tetralonioidella tianmuensis 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 19. Tetralonioidella tianmuensis 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=1 mm; b, c, d=0.5mm.