Towards a revision of the genus Periclimenes: resurrection of Ancylocaris Schenkel, 1902, and designation of three new genera (Crustacea, Decapoda, Palaemonidae)

Towards a revision of the genus Periclimenes: resurrection of Ancylocaris Schenkel, 1902, and designation of three new genera (Crustacea, Decapoda, Palaemonidae)

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Based on recently published molecular phylogenies of Indo-West Pacific palaemonid shrimps and further morphological evidence, the systematic position of several species of the polyphyletic Mirrors genus Periclimenes is revised.The generic name Ancylocaris Schenkel, 1902 is re-established for the anemone-associated P.brevicarpalis.Actinimenes gen.n.

, is proposed for the anemone-associated P.inornatus, P.ornatellus and P.ornatus, all of which have a subspatulate first pereiopod.Cristimenes gen.

n., is designated for the echinoderm-associated species, P.commensalis, P.cristimanus, and P.zanzibaricus, all with a unique carpo-propodal articulation of the second pereiopods.

Rapimenes gen.n.is established for the hydroid and antipatharian-associated P.brucei, P.granulimanus, and P.

laevimanus, for which the long, slender and unequal Youth Button Ups second pereiopods and prehensile ambulatory propodi are the main synapomorphic characters.