Hybalus alonsoi is a species of beetle of the family Scarabaeidae. It is found in Spain.
Description Adults reach a length of about . They have a very broad, stout, and convex body. The elytra have evenly rounded sides. They are entirely black in colour, with a glossy head, pronotum, and elytra. Males possess a large, long clypeal horn that slopes backward.
Etymology The species is named in honour of Miguel Ángel Alonso Zarazaga.
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