Coleoptera - Beetles - margygreen
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mating predaceous diving beetles, Thermonectus nigrofasciatus (Dytiscidae). Male showing sexually dimorphic suction cups on front tarsi. Mendoza Canyon, King Anvil Ranch, Pima Co., Arizona USA

mating predaceous diving beetles, Thermonectus nigrofasciatus (Dytiscidae). Male showing sexually dimorphic suction cups on front tarsi. Mendoza Canyon, King Anvil Ranch, Pima Co., Arizona USA