Trachusa (Paraanthidium) staabi Niu, 2019

Niu, Ze-Qing, Ascher, John S., Orr, Michael C., Griswold, Terry & Zhu, Chao-Dong, 2019, Overview of the bee genus Trachusa Panzer, 1804 (Hymenoptera: Apoidea Megachilidae: Anthidiini) from China with description of three new species, Zootaxa 4646 (2), pp. 251-270 : 262

Trachusa (Paraanthidium) staabi Niu , sp. nov.

( Fig. 10 : A–H, female)

Diagnosis: This new species is only known from the female; it belongs to subgenus Paraanthidium , for the mandible is five-toothed, the second recurrent vein ends distal to second submarginal crossvein, the subantennal suture is slightly outwardly arcuate, and the scutellum is broadly rounded but emarginate medially. The new species is very similar to T. ovata , but in T. ovata the basal half of each wing is strongly fuscate and, the outer half is milky white, the scutum is densely covered with reddish-brown erect pubescence; the new species wings fuscate throughtout, the scutum polished and shining, with large and dense rounded punctures.

Description: Female, BL= 13.5 mm ( Fig. 10A ); head broader than long, HW: HL=105: 95 ( Fig. 10B ); gena slightly narrower than eye, GW: EW=24: 28; MtW: MsW=134: 130 ( Fig. 10E , Fig. 10F ); ocelloccipital distance longer than ocellocular distance, OCD: OOD=26: 20. Clypeus broader than long, concave with apical margin slight- ly emarginate in middle, with a shining longitudinal slightly elevated middle line starting from basal to middle of clypeus, punctation irregularly and craggy ( Fig. 10C ); subantennal suture slightly arcuate outwardly ( Fig. 10C ); mandible dull, minutely roughened and bearing very short hairs, broadened apically, with five black teeth ( Fig. 10 , D); vertex polished and shining, with sparse and fine punctures ( Fig. 10B ); omaular carina present, extending down to middle of mesepisternum ( Fig. 10A ); pronotal lobe large, lamellate ( Fig. 10E ); scutum polished and shining, with large and dense rounded punctures ( Fig. 10E ); scutellum broadly rounded, emarginate medially, overhanging metanotum, punctation irregular and wrinkled ( Fig. 10E ); lateral margin of axilla convex ( Fig. 10E ); disc of T1–T2 with sparse and rounded punctures, posterior marginal zone of T1–T2 with dense and shallow small punctures ( Fig. 10F ), vein cu-v of hind wing oblique, nearly as long as second abscissa of M+Cu, second recurrent vein ends distal to second submarginal crossvein ( Fig. 10H ); arolia present, claw with inner median tooth ( Fig. 10A , Fig. 10G ). Body black, without yellow markings, only scutellum and basal middle of T2 dull reddish black ( Fig. 10E , Fig. 10F ); T5 with sparse fulvous hairs, T6 with dense fulvous hairs ( Fig. 10G ); scopa fulvous ( Fig. 10A ); wings fuscate throughout ( Fig. 10H ).

Male, unknown.

Type material: Holotype, ♀, China, Zhejiang, Gutianshan (29º14′N, 118º07′E), 1542 m, 4.VI.2013, leg. Mi- chael STAAB ( IZCAS).

General distribution: China (Zhejiang *, Fujian *) .

Etymology: The specific name is dedicated to Dr. Michael Staab for his collection of the specimens.

Figures

FIGURE 10. Trachusa (Paraanthidium) staabi Niu, sp. nov., A–H, female. A: Body in lateral view; B: Head in frontal view; C: Supraclypeal area in frontal view, showing subantennal suture; D: Mandible in frontal view, showing teeth; E: Mesosoma in dorsal view; F: Metasoma in dorsal view, showing T1–T3; G: Metasoma in dorsal view, showing T4–T6; H: Fore wing in frontal view, showing the position of the second recurrent vein. Scale bars: 1.0 mm.