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image of Journal of Crustacean Biology

ABSTRACT A new genus, Pseudopetalophthalmus, is established for P. japonicus, new species, collected from Japanese waters. Pseudopetalophthalmus is closely related to the genus Petalophthalmus, but distinguished from it by the rostrum lacking an acute process, the antennal scale armed with a single spine at the distal end of the naked part of the outer margin, the mandibular palp with the third segment 0.25 as long as the second segment and bearing 7 spines, the maxilla with a short exopod and an expanded distal lobe, and the telson with a truncate apex with spines arranged in definite series of 9 groups. The generic diagnosis of Petalophthalmus is amended to include Petalophthalmus australis.


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