Nomia (Gnathonomia) pieli Cockerell, 1931

Zhang, Dan, Niu, Ze-Qing, Orr, Michael C., Ascher, John S. & Zhu, Chao-Dong, 2020, Chinese species of Nomia (Gnathonomia) Pauly, 2005 (Hymenoptera: Apoidea Halictidae: Nomiinae), Zootaxa 4768 (1), pp. 76-94 : 89-93

Nomia (Gnathonomia) pieli Cockerell, 1931

( Figs 10–12 )

Nomia pieli Cockerell, 1931a: 9 , ♀. Holotype: ♀, China: Kiangsu (Jiangsu), AMNH.

Diagnosis. Both sexes of this species can be distinguished from other species of subgenus Gnathonomia by T3–4 with stronger basal hair bands and apical margin of T2–4 with translucent bands ( Figs 10e , 12e ). Male. Hind femur weakly developed ( Fig. 10d ); upper lateral surface of propodeum with fine, dense, nearly confluent punctures, without narrow shiny interspaces ( Fig. 10f ); T3–4 with basal hair bands ( Fig. 10e ).

Description. Male (newly described). BL= 8–11 mm, body blackish-brown ( Fig. 10b ). Head. HL: HW=0.81, head broader than long ( Fig. 10a ); GW: EW= 0.71, eye much broader than gena ( Fig. 10a ); upper interocular distance narrower than lower interocular distance; interocellar distance greater than ocellocular distance ( Fig. 10a ); mandible enlarged, blackish-brown, upper margin with one tooth medially ( Fig. 10a ); frons with dense punctures and smooth frontal line medially ( Fig. 10a ); vertex with sparse punctures, bigger than punctures on frons; vertex with rounded posterior margin ( Fig. 10c ); antenna reaching scutellum ( Fig. 10b ); scape nearly equal to F1–3 together in length ( Fig. 10a, 10c ); F1 nearly as long as broad ( Fig. 10a ); F2 nearly 2.2–2.4 times as long as F1 ( Fig. 10a ); F2–10 almost equal in length, nearly 2.2–2.3 times as long as broad; F11 rounded apically ( Fig. 10b ); ocelli normal, not enlarged ( Fig. 10a ). Mesosoma. Mesoscutum, scutellum and metanotum dull, with fine dense punctures ( Fig. 10c, 10f ); upper lateral surface of propodeum with fine dense, nearly confluent punctures ( Fig. 10f ); metapost- notum with narrow longitudinal wrinkles; inclined part of metapostnotum narrowly triangular and dull ( Fig. 10f ); fore wing with three submarginal cells, 1 st submarginal cell almost equal to 3 rd submarginal cell in length, about twice as long as 2 nd submarginal cell ( Fig. 10b ); legs blackish-brown; hind femur slightly developed ( Fig. 10d ); hind tibia normal ( Fig. 10d ). Metasoma. Metasomal terga dull, with dense minute punctures; apical margin of T2–5 with transparent bands and with white hairs beneath ( Fig. 10e ); S5 round apically, apical margin with two hair brushes medially ( Fig. 11c ); S6 deeply thickened apically ( Fig. 11b ); S7 as showing in Fig. 11e; S 8 as showing in Fig. 11f ; upper margin of gonostylus rounded, as showing in Fig. 11a (in ventral view) and Fig. 11b (in lateral view). Pubescence. Clypeus, supraclypeal area and frons with dense short yellowish hairs ( Fig. 10a ); mesoscutum, scutellum and metanotum with short yellowish hairs ( Fig. 10c ); upper lateral surface of propodeum with long yellowish hairs ( Fig. 10f ); legs with sparse short hairs ( Fig. 10b, 10d ); metasomal terga with sparse yellowish hairs ( Fig. 10d, 10f ). S3–4 with long yellowish hairs medially ( Fig. 10g ).

Female. BL= 10–11 mm. Similar to male, except follows: clypeus, supraclypeal area and frons with sparse hairs ( Fig. 12a ); mandible and legs normal, not modified ( Fig. 12a ); apical margin of S3–5 with hair bands ( Fig. 12f ). Material examined. China: Shanghai: 26 ♀, 20 ♂, Shanghai (31°06′09″N, 121°07′14″E), 4m, 26.VI.1933, 16.VII.1930, 29.VI.1933, 26.VI.1925, 20.VI.1939, leg. O. Piel; 20 ♂, same locality, 22.VI.1933, leg. A. Savio; Zhejiang: 3 ♂, Jiangshan (28°55′40″N, 118°17′05″E), 816m, 15.VI.1932, leg. T. C. Maa. Distribution. China (Jiangsu, Shanghai, Zhejiang), thus seemingly endemic to eastern China. Floral association. Unknown. Remarks. Male is described for the first time here. This species was described from the female only by Cockerell (1931a) in a paper on many new bee species from China collected by Rev. Octave Piel. We examined the

specimens deposited in IZCAS, including male and female, with matching collection information. The male of this species is very similar to N. radiata ( Pauly, 2009) , and Pauly said the female of that species is difficult to distinguish from the female of N. pieli . As we did not examine specimens of N. radiata ( Pauly, 2009) , future integrative taxonomic studies are needed to assess the status of those two species.

Figures

FIGURE 8. Nomia (Gnathonomia) thoracica Smith, 1875, male. a: Genitalia in ventral view; b: Genitalia in lateral view; c: S5 in ventral view; d: S6 in ventral view; e: S7 in ventral view; f: S8 in ventral view. Scale bars: 0.5 mm.

FIGURE 10. Nomia (Gnathonomia) pieli Cockerell, 1931, male. a: Head in frontal view; b: Body in lateral view; c: Mesosoma in dorsal view; d: Hind femur and tibia; e: Metasoma in dorsal view; f: Propodeum in dorsal view, showing the punctures on the propodeum; g: Metasoma in ventral view. Scale bars: 1 mm.

FIGURE 11. Nomia (Gnathonomia) pieli Cockerell, 1931, male. a: Genitalia in ventral view; b: Genitalia in lateral view.; c: S5 in ventral view; d: S6 in ventral view; e: S7 in ventral view; f: S8 in ventral view. Scale bars: 0.5 mm.

FIGURE 12. Nomia (Gnathonomia) pieli Cockerell, 1931, female. a: Head in frontal view; b: Body in lateral view; c: Mesosoma in dorsal view; d: Propodeum in dorsal view; e: Metasoma in dorsal view; f: Metasoma in lateral view. Scale bars: 1 mm.