FIGURES 144‒147 in The arctic and alpine bumblebees of the subgenus Alpinobombus revised from integrative assessment of species' gene coalescents and morphology (Hymenoptera, Apidae, Bombus)

FIGURES 144‒147. Morphology of males. Dorsal aspect of the penis valves of: 144, B. natvigi; 145, B. neoboreus (white lines indicate location of the subapical outer tooth of the left penis valve). Dorsal aspect of left gonostylus: 146 B. kirbiellus; 147, B. polaris (white lines indicate anterior, midpoint, and posterior median projections of left gonostylus).