Superfamily IDOTEOIDEA Samouelle, 1819

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• Idoteoidea Samouelle, 1819.

Introduction

Three families of Valvifera, Chaetiliidae, Holognathidae and Idoteidae, are included in Idoteioidea. While Holognathidae are probably monophyletic, having a shortened pereopod 4, relationships between the others are less clear. Idoteids have simple pereopods but those of chaetiliids are diverse; both families contain genera with plesiomorphic biramous uropods suggesting both families could be polyphyletic.

Diagnosis

Body more or less flattened or semicylindrical, coxae with expanded coxal dorsal plates, pleonites with expanded epimera. Head and pereonite 1 free, or fused (Crabyzos, Lyidotea only). Pereopod 1 subchelate; pereopods variously subchelate or ambulatory. Pleopod 1 peduncle shorter than or as long as rami (similar to pleopods 2 and 3); exopod of male laminar.

History of changes