Bombus (Pyrobombus) taiwanensis Williams, Sung, Lin & Lu, 2022

Figs 1‒4

[ Bombus sp. non descripta Chiu 1948: 71.]

[ Bombus (Pyrobombus) nr. hypnorum Starr, 1992: 149 .]

Bombus (Pyrobombus) taiwanensis Williams et al., 2022: 438 . Holotype by original designation: ♀, Mt Hehuan, Taiwan (TFRI). Examined.

Diagnosis

Female

Distinguished by: clypeus in the central area smooth and shining with only a few large punctures, mostly spaced by much more than their own widths; ocello-ocular area with the inner eye margin mostly shining with few small punctures and the few larger, medium punctures forming a single row parallel to the eye margin; front, middle and hind leg basitarsi all with the exoskeleton lighter brown than for the tibiae; hair predominantly black but with metasomal T4‒6 a dull sandy-brown or pale orange.

Male Distinguished by: front, middle and hind leg basitarsi all with the integument lighter brown than the tibiae; genitalia with the gonostylus inner anterior (basal) projection separated from the gonocoxa by less than the breadth of the recurved hook of the penis-valve head.

Material examined

Material sequenced or examined

CHINA – Taiwan • 1 ♀ (worker); Nantou Hsien, Tsuifeng [Cuifeng]; 24.1060° N, 121.1988° E; alt. 2300 m; 23‒25 Jun. 1983; K.S. Lin and C. Lin leg.; BOLD-1550A06-TWN; PW • 1 ♂; Hualien Hsien, Tayuling; 23.9767° N, 121.5206° E; alt. 2560 m; 9‒16 Jun. 1980; K.S. Lin and B.H. Chen leg.; BOLD- 1550A07-TWN; PW .

Other material sequenced

GenBank: MZ831884, MZ831885, MZ831886, MZ831887, MZ831891, MZ831892.

Distribution

Endemic to the mountains of Taiwan, where it is extremely rare, at elevations of 2300‒3100 m (Williams et al. 2022).