Microprotopidae Myers & Lowry, 2003

Myers, Alan A., Lowry, James K. & Billingham, Zac, 2016, A new family, genus and species of freshwater amphipod Australomicroprotopus megacoxa gen. nov. sp. nov. (Senticaudata, Corophiidea, Microprotopoidea, Australomicroprotopidae fam. nov.) from Australia, Zootaxa 4161 (3), pp. 412-418 : 413

Family Microprotopidae Myers & Lowry, 2003

Diagnosis. Mandible palp article 3 nearly parallel-sided, posterior margin without, or with very few, setae. Male gnathopod 2 coxa only a little larger than coxa 1 and 3. Uropods 1–2 peduncle without inter-ramal spine. Uropod 3 uniramous.

Type genus. Microprotopus Norman, 1867 .

Included genus. Microprotopus Norman, 1867 , by monotypy.

Remarks. The only discrete differences between Microprotopidae and Photidae are antenna 1 article 1 length compared with article 2 (subequal in Microprotopidae , shorter in Photidae ); pereopods 5–6 merus setation (posterior margin weakly setose in Microprotopidae , without setae in Photidae ) and pereopod 5 carpus shape (slightly expanded in Microprotopidae , linear in Photidae ). Photidae also have rounded eye lobes that are often strongly extended whereas Microprotopidae have sub-triangular eye lobes.