Thrinchostoma (T.) sladeni Cockerell, 1913 New

Zeqing Niu, Feng Yuan, Pia Oremek, Feng Liu & Chaodong Zhu, 2016, Thrinchostoma Saussure, little known bee genus from China, with description of a new species (Hymenoptera: Halictidae), Zoological Systematics 41 (2), pp. 207-215 : 210-212

Thrinchostoma (T.) sladeni Cockerell, 1913 New record to China ( Figs 1–16 )

Thrinchostoma sladeni Cockerell, 1913: 35 , ♂ (non. ♀). Type locality: India, Assam, Khasia Hills.

Halictus wroughtoni Bingham, 1897 (nec Cameron, 1897): 432, ♂, ♀, not examined.

Halictus (Rostratilapis) sladeni Friese 1914: 27 , ♂ (non. ♀).

Thrinchostoma sladeni Cockerell : Sladen, 1915: 213, ♂; Blüthgen, 1926: 377, ♂, ♀.

Thrinchostoma (T.) sladeni Cockerell : Michener, 1978: 524 (list); Michener & Engel, 2010: 133 (list), 131, ♀ (key), 133, ♂ (key); Saini & Rathor, 2012: 164 (list).

Diagnosis. All specimens collected from China bear the following characters: the male malar area nearly as long as the width of mandible base ( Fig. 3 ), metafemur, metatibia strongly swollen, and metatrochanter ventrally with angular projection ( Fig. 6 ), basal margin of S5 with two transverse rows of spines numbered in 3 respectively at both sides ( Fig. 5 ); the female malar area about one-third as long as the width of mandible base ( Fig. 13 ), second marginal crossvein angulated medially ( Fig. 14 ), metasomal terga with short, simple, laterally-directed hairs on posterior marginal zones, T2 with broad orange apical margin ( Fig. 15 ). All these characters diagnosed our specimens as T. (T.) sladeni Cockerell, 1913 .

Materials examined. China, Yunnan, Xishuangbanna, NWNR: Naban (100º40′E, 22º09′N), 1♀ 1♂, 12.V.2008, 1♀, 729 m, 6.IV.2009, 2♀, 709 m, 26.IV.2009, 1♀, 732 m, 26.V.2009, coll. Lingzeng Meng; 2♀, 729 m, 2♀, 732 m, 23.V.2008, 2♀, 729 m, 6.VI.2008, 1♀ 1♂, 709 m, 15.VI.2008, 1♀, 729 m, 28.VI.2008, 3♀, 732 m, 18.VII.2008, coll. A. Weigel; Mandian (100º40′E, 22º07′N), 1♀, 753 m, 6.VI.2008, 1♀, 753 m, 15.VI.2008, 2♀, 28.VI.2008, 2♀, 753m, 8.VII.2008, coll. A. Weigel; 2♀, 753 m, 16.III.2009, 2♀, 753 m, 6.IV.2009, 1♀, 746 m, 16.IV.2009, 2♀, 746 m, 6.V.2009, 4♀, 753 m, 16.V.2009, 4♀, 753 m, 6.VI.2009, 2♀, 2♂, 26.VI.2009, coll. Lingzeng Meng; Anma Xinzai (100º39′E, 22º12′N), 4♀, 772 m, 6.IV.2009, 1♀, 772 m, 26.V.2009, coll. Lingzeng Meng; 1♀, 13.VI.2013, coll. Pia Oremek; Danuoyou (100º38′E, 22º12′N), 1♀, 770 m, 26.V.2009, coll. Lingzeng Meng; 1♀, 1.V.2013, 1♀, 10.VII.2013, coll. Pia Oremek; Jinhong Mekong Hill Garden (100º47′E, 22º01′N), 1♀, 30.XII.2007, coll. A. Weigel; Banggang Xinzai (100º15′E, 22º09′N), 1♀, 12.V.2008, coll. Lingzeng Meng; Manfei (100º40′E, 22º08′N), 1♀, 14.V.2013, 1♀, 29.VI.2013, coll. Pia Oremek; Xiaomangmu (100º28′E, 22º00′N), 1♂, 29.V.1987, ( Alpinia sp.), coll. Tao Zhu; Juzidi (100º37′E, 22º13′N), 1♀, 30.IV.2013, 1♂, 11.VI.2013, 1♀, 25.VI.2013, coll. Pia Oremek; China, Yunnan, Xishuangbanna, Mile Xian, Bubang (103º14′E, 24º07′N), 1♂, 700 m, 16.IX.1993, coll. Huanli Xu.

Distribution. China (Yunnan), India (Assam, Khasia Hills; Cockerell, 1913).

Floral association. Alpinia sp. (Zingberaceae).

Remark. This species was previously only recorded from India in literature. It is a newly recorded species for China.

Figures

Figures 1 – 6. Thrinchostoma (T.) sladeni Cockerell, 1913, male. 1. Habitus, lateral view. 2. Head, frontal view. 3. Head, lateral view. 4. Metasoma, dorsal view, showing T 1 – 2. 5. Metasoma, ventral view. 6. Hind leg, lateral view, showing the trochanter, femur and tibia. Scale bars = 1 mm.

Figures 7 – 10. Thrinchostoma (T.) sladeni Cockerell, 1913, male. 7. Fore wing, dorsal view, showing second submarginal crossvein and the hair spot. 8. Genitalia, dorsal view. 9. Genitalia, lateral view. 10. S 7 – 8, ventral view. Scale bars = 1 mm.

Figures 11 – 16. Thrinchostoma (T.) sladeni Cockerell, 1913, female. 11. Habitus, lateral view. 12. Head, frontal view. 13. Head, lateral view. 14. Fore wing, dorsal view, showing second submarginal crossvein angulated medially. 15. Metasoma, dorsal view, showing T 1 – 2. 16. Hind tibia, showing the inner tibial spur. Scale bars = 1 mm.