Mendacibombus
Creators: name: Williams, Paul H.
name: Huang, Jiaxing
name: Rasmont, Pierre
name: An, Jiandong
Publisher: name: Zenodo
Year: 2016
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Apidae
Mendacibombus

description: Key to Mendacibombus species for males
1. Volsella at its broadest near the midpoint of its length, the dorsal surface just distal to this point with a raised curved ridge, usually with small teeth, just inside the inner margin, running for 0.3‒0.5× the remaining distal length of the volsella (Fig. 36)..................................................................................................... 2
- Volsella at its broadest near the midpoint of its length, the dorsal surface just distal to this point without a raised curved ridge just inside the inner margin (Fig. 37)..................................................................... 4
2 (1). Volsella distally terminating in a rounded right angle and barely curled back dorsally and not at all anteriorly (Fig. 38); hair of the anterior thoracic dorsum yellow.............................................................. B. superbus
- Volsella distally sharply acute (pointed) and curled back dorsally and anteriorly (Fig. 39); hair of the anterior thoracic dorsum black or black with white hairs intermixed................................................................ 3
3 (2). Gonostylus length 1.25× its greatest breadth (Fig. 40); penis-valve head (defined by an outer toothed flange) length 0.33× the penis-valve total length from its distal apex to the broadest point of the spatha (Fig. 40); hair of the anterior thoracic dorsum black and hair of metasomal T4‒5 black or orange, although often all of these hairs have white tips............ B. waltoni
- Gonostylus length 2× its greatest breadth (Fig. 41); penis-valve head (defined by an outer toothed flange) length 0.25× the penis-valve total length from its distal apex to the broadest point of the spatha (Fig. 41); hair of the anterior thoracic dorsum and hair of metasomal T4‒5 with a mixture of entirely white and entirely black hairs...................... B. convexus
4 (1). Penis-valve inner shoulder located at 0.63× the penis-valve length from the distal end to the broadest point of the spatha (Fig. 42)........................................................................................ B. defector
- Penis-valve inner shoulder located at ± 0.5× the penis-valve length from the distal end to the broadest point of the spatha (Fig. 43)................................................................................................ 5
5 (4). Penis valve proximal to the outer shoulder> 2× as broad as the penis-valve head (defined by an outer toothed flange) (Fig. 44)....................................................................................................6
- Penis valve proximal to the outer shoulder <2× as broad as the penis-valve head (defined by an outer toothed flange) (Fig. 45)....................................................................................................9
6 (5). Gonostylus distally strongly dorso-ventrally flattened and plate-like, thickness <0.25× its own breadth (Fig. 46); wings light brown.................................................................................. B. avinoviellus
- Gonostylus distally thick, thickness> 0.25× its own breadth (Fig. 47); wings nearly clear........................... 7
7 (6). Gonostylus with the inner distal corner a right angle from both the inner and dorsal aspects (Fig. 48); thoracic dorsum between the wing bases with the hair usually entirely black; hair of T2 yellow with always at least a distinct black band along the posterior margin or T2 sometimes predominantly black.................................................. B. mendax
- Gonostylus with the inner distal corner distinctly acute from both the inner and the dorsal aspects (Fig. 49); hair of the thoracic dorsum between the wing bases black but sometimes with many yellow or white hairs intermixed; hair of T2 yellow or white
with only a few black hairs along the posterior margin....................................................... 8 8 (7). Gonostylus thick and nearly black, in dorsal aspect short and broad, 1.5× as long as its greatest breadth, the inner and outer lateral margins strongly diverging in the anterior proximal half, the penis-valve head (defined by an outer toothed flange) in dorsal aspect narrowing towards its distal end often (not always) gradually in its distal two thirds............. B. margreiteri
- Gonostylus thin and brown, in dorsal aspect long and narrow, 2× as long as its greatest breadth, the inner and outer lateral margins nearly parallel in the anterior proximal half, the penis-valve head (defined by an outer toothed flange) in dorsal aspect narrowing only in its distal third.................................................................. B. makarjini
9 (5). Penis-valve breadth just proximal to the penis-valve head (defined by an outer toothed flange) 0.06× the penis-valve length from its distal apex to the broadest point of the spatha (Fig. 50).................................. B. handlirschianus
- Penis-valve breadth just proximal to the penis-valve head (defined by an outer toothed flange) 0.11× the penis-valve length from its distal apex to the broadest point of the spatha (Fig. 51)................................................10
10 (9). Volsella with the apex narrowed, narrower than the adjacent penis-valve head (Fig. 52); hindleg tibia with the anterior and posterior fringes entirely yellow............................................................... B. turkestanicus
- Volsella with the apex broad, broader than the adjacent penis-valve head (Fig. 53); hindleg tibia with the anterior and posterior fringes either black or with many black hairs, only rarely entirely yellow....................................... 11
11 (10).Gonostylus from the dorsal aspect rectangular, with a distinct outer distal corner (Fig. 54); hair of the thoracic dorsum between the wing bases either usually almost entirely black or occasionally yellow with many black hairs intermixed across the breadth........................................................................................ B. himalayanus
- Gonostylus from the dorsal aspect almost triangular, without a distinct outer distal corner but broadly rounded (Fig. 55); hair of the thoracic dorsum between the wing bases entirely yellow except in a central spot that sometimes has black hairs................................................................................................. B. marussinus
description: Published as part of Williams, Paul H., Huang, Jiaxing, Rasmont, Pierre & An, Jiandong, 2016, Early-diverging bumblebees from across the roof of the world: the high-mountain subgenus Mendacibombus revised from species' gene coalescents and morphology (Hymenoptera, Apidae), pp. 1-72 in Zootaxa 4204 (1) on pages 23-24, DOI: 10.11646/zootaxa.4204.1.1, http://zenodo.org/record/192302