Hapalogasteridae, Brandt, 1850

Wicksten, Mary K., 2012, Decapod Crustacea of the Californian and Oregonian Zoogeographic Provinces 3371, Zootaxa 3371, pp. 1-307 : 163

Key to species of family Hapalogasteridae

1. Carapace distinctly flattened, covered with numerous subequal spines. Legs spiny............. .. Acantholithodes hispidus

– Carapace flattened to moderately convex, without spines; legs sparsely setose to extremely setose but without spines...... 2

2. Carapace and legs flattened, pubescent. Carapace not granular on upper surface................. Hapalogaster cavicauda

– Carapace, legs not flattened or pubescent. Carapace granular on upper surface..................... Oedignathus inermis