Subfamily Mesacanthotelsoninae Nicholls, 1944

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Introduction

Crenoicus Nicholls, 1944 is transferred to this subfamily from the Phreatoicinae and Uramphisopus Nicholls, 1943 is removed from Phreatoicopsinae. In the following, we have elevated Nicholls' subspecies to species level, owing to a lack of information to support the subspecies category. Most of the features in the diagnosis for this subfamily are plesiomorphies at the level of the Phreatoicidae. Nicholls described numerous species and subspecies of phreatoicids, many from single specimens, which are now lost.

Diagnosis

Pleotelson with medial lobe reflexed dorsally; lateral lobes rounded (not as vertical plate) and distinctly separated from medial lobe. Mandible incisor process broad, wider than thick. Pleopodal protopods 2-5 with medial epipods. Uropodal rami distally spine-like and pointed, terminal robust seta not distinctly separated from ramus.

General References

Nicholls, G.E. 1943. The Phreatoicoidea. Part I. The Amphisopidae. Papers and Proceedings of the Royal Society of Tasmania 1942: 1-145

Nicholls, G.E. 1944. The Phreatoicoidea. Part II. The Phreatoicidae. Papers and Proceedings of the Royal Society of Tasmania 1943: 1-157

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