AMPHIPODA FROM

Tomikawa, Ko, Kobayashi, Norio, Morino, Hiroshi & Mawatari, Shunsuke F., 2007, New gammaroid family, genera and species from subterranean waters of Japan, and their phylogenetic relationships (Crustacea: Amphipoda), Zoological Journal of the Linnean Society 149 (4), pp. 643-670 : 653

NEW GAMMAROIDEAN AMPHIPODA FROM JAPAN 653

niramous (length of inner ramus about 0.7 × length of outer ramus).

Type species: Octopupilla felix Tomikawa sp. nov. by monotypy.

Etymology: The genus name is from the Latin octo (eight) and pupilla (pupil) referring to the vestigial eyes represented by eight pigment spots.

Remarks: Octopupilla is distinguished from Eoniphargus by the following characters ( Eoniphargus in parentheses): eyes are vestigial, represented by eight pigment spots (absent); the dorsal margin of the urosomite 3 has robust setae (lacking); epimeral plates 2 and 3 with robust ventromarginal setae (setae lacking); uropod 3 is magniramous (parviramus); and the inner ramus of uropod 3 is 0.7 times as long as the outer (0.3 times).