Bombus (Alpinobombus), Skorikov, Skorikov

Williams, Paul H., Berezin, Mikhail V., Cannings, Sydney G., Cederberg, Björn, Ødegaard, Frode, Rasmussen, Claus, Richardson, Leif L., Rykken, Jessica, Sheffield, Cory S., Thanoosing, Chawatat & Byvaltsev, Alexandr M., 2019, The arctic and alpine bumblebees of the subgenus Alpinobombus revised from integrative assessment of species’ gene coalescents and morphology (Hymenoptera, Apidae, Bombus), Zootaxa 4625 (1), pp. 1-68 : 20

publication ID	https://doi.org/ 10.11646/zootaxa.4625.1.1
publication LSID	lsid:zoobank.org:pub:D08DD464-F1AD-4253-888C-65A2A293F517
persistent identifier	https://treatment.plazi.org/id/AC4D691F-FFB7-5E13-FF68-5CF070A2F829
treatment provided by	Plazi
scientific name	Bombus (Alpinobombus)
status

Treatment

Key to Alpinobombus species for males

1 Cheek> 2.0× as long (oculo-malar distance) as broad (breadth of the mandible at its base between and including condyles); penis-valve head on its outer edge proximal to the apex by a distance approximately equal to the breadth of the penis-valve head without a tooth, rarely with a very small point without an underlying convex bump that does not break the longer curve of the outer penis-valve head (maximum size in Fig. 144 View FIGURES 144‒147 ).......................................................... 2

- Cheek <2.0× as long as broad; penis-valve head on its outer edge proximal to the apex by a distance approximately equal to the breadth of the penis-valve head with a strong spinose tooth often placed on a convex bump on the edge of the penis-valve head (minimum size in Fig. 145 View FIGURES 144‒147 )......................................................................... 4

2 (1) North America, hair of the face below antennal base with a large patch predominantly yellow ( Figs. 112‒115 View FIGURES 104‒115 ); mandibular pos- terior fringe (‘beard’) unusually sparse, but the outer surface of the mandible with an extremely dense covering of short even branched orange hairs (which may appear dark if matted), forming a pronounced thick dense broad rounded pad extending from the mandibular articulations to just short of the mandibular teeth ( Fig. 149 View FIGURES 148‒149 )............................. B. kluanensis View in CoL

- North America or Europe or Russia, hair of the face almost entirely black ( Figs. 119‒123 View FIGURES 116‒123 , 127‒128 View FIGURES 124‒128 ); mandibular posterior fringe long and dense, but the outer surface of the mandible with any short branched hairs mostly black or dark, longer, and not forming a pronounced pad ( Fig. 148 View FIGURES 148‒149 )...................................................................... 3

3 (2) Europe or Russia, hair of the pale bands usually dark chestnut brown (or pale yellow from Wrangel Island) ( Figs. 127‒128 View FIGURES 124‒128 , 137 View FIGURES 129‒137 )..................................................................................... B. hyperboreus View in CoL

- North America or Greenland, hair of the pale bands usually pale straw yellow ( Figs. 1 19‒123 View FIGURES 1‒6 View FIGURE 7 View FIGURE 8 View FIGURE 9 View FIGURE 10 View FIGURES 11‒13 View FIGURE 14 View FIGURES 15‒21 View FIGURES 22‒38 View FIGURES 39‒58 View FIGURES 59‒76 View FIGURES 77‒88 View FIGURES 89‒103 View FIGURES 104‒115 View FIGURES 116‒123 , 136 View FIGURES 129‒137 )............. B. natvigi View in CoL

4 (1) North America, gonostylus inner (medial) edge between the anterior and posterior inner corners nearly straight, the proximal (anterior) corner not projecting ( Fig. 134 View FIGURES 129‒137 ); hair of the band between the wing bases and on T4 usually predominantly black, at most with only a very few pale hairs ( Figs. 101‒103 View FIGURES 89‒103 )............................................... B. neoboreus View in CoL

- North America or Europe or Asia, gonostylus inner edge between the anterior and posterior inner corners strongly concave or sinusoidal, the proximal corner projecting ( Figs. 129‒133 View FIGURES 129‒137 ); hair of the band between the wing bases either black or with yellow intermixed and on T4 either black or with patches of either orange or yellow or white ( Figs. 18‒21 View FIGURES 15‒21 , 32‒38 View FIGURES 22‒38 , 52‒58 View FIGURES 39‒58 , 71‒76 View FIGURES 59‒76 , 85‒88 View FIGURES 77‒88 ).............................................................................................. 5

5 (4) Cheek> 1.5× as long (oculo-malar distance) as broad (breadth of the mandible at its base between and including condyles); gonostylus inner (medial) edge strongly and consistently concave, the submarginal groove broad and sharply defined, the anterior and posterior inner corners strongly extended ( Fig. 146 View FIGURES 144‒147 ); metasoma hair with yellow and black patterns (if present) sharply defined............................................................................................. 6

- Cheek <1.5× as long (oculo-malar distance) as broad (breadth of the mandible at its base between and including condyles); gonostylus inner edge either nearly straight, or weakly concave with a convexity near its midpoint, the submarginal groove indistinct, the anterior and posterior inner corners weakly extended ( Fig. 147 View FIGURES 144‒147 ); metasoma hair with yellow and black patterns (if present) weakly defined and diffuse with widely scattered pale hairs.......................................... 7

6 (5) Europe or Russia; gonostylus inner (medial) edge deeply concave almost as a semi-circle ( Figs. 71‒76 View FIGURES 59‒76 , 132 View FIGURES 129‒137 ).... B. balteatus View in CoL

- North America; gonostylus inner edge shallowly concave ( Figs. 85‒88 View FIGURES 77‒88 , 133 View FIGURES 129‒137 )............................. B. kirbiellus View in CoL

7 (5) Hind tibia outer surface with distinct microsculpture and matte, hair of the median anterior margin of T2 either usually in part black or entirely yellow ( Figs. 32‒38 View FIGURES 22‒38 , 52‒58 View FIGURES 39‒58 ); penis valve ventro-lateral process without a pronounced distal lateral shoulder; gonostylus posteriorly more than half as broad as anteriorly ( Figs. 130‒131 View FIGURES 129‒137 )...................................... 8

- Hind tibia outer surface without microsculpture and shining, hair of the median anterior margin of T2 almost entirely orange ( Figs. 18‒21 View FIGURES 15‒21 ); penis valve ventro-lateral process with a pronounced distal lateral shoulder; gonostylus posteriorly less than half as broad as anteriorly ( Fig. 129 View FIGURES 129‒137 )................................................................... B. alpinus View in CoL

8 (7) Europe or Russia ( Figs. 32‒38 View FIGURES 22‒38 , 130 View FIGURES 129‒137 ).......................................................... B. pyrrhopygus View in CoL

- North America or Greenland ( Figs. 52‒58 View FIGURES 39‒58 , 131 View FIGURES 129‒137 )...................................................... B. polaris View in CoL