A new species ofParaglypturus(Crustacea: Decapoda: Axiidea: Callianassidae) from a vent field in the Tonga Arc of the south-western Pacific Ocean

Abstract

A new species of callianassid ghost shrimp,Paraglypturus tonganussp. nov., is described and illustrated on the basis of five specimens that were collected from sediments in a vent field of the Tonga Arc, south-western Pacific Ocean. This new species is morphologically very similar toP. calderusTürkay & Sakai, 1995, the type species of the genusParaglypturusTürkay & Sakai, 1995. It differs fromP. calderusmainly in the absence (vs. presence inP. calderus) of an anterolateral row of setal pores on the carapace; the endopod of the second maxilliped, with a dactylus bearing stiff and thick serrate setae at the apex (vs. without inP. calderus); a yellow circular structure located on the ventral surface on the uropodal endopod (vs. on the dorsal surface on the uropodal exopod inP. calderus); and the articulation structure of the first pleopod in males (uniarticulate inP. tonganusvs. biarticulate inP. calderus). The new species is the first record of a ghost shrimp from a vent field of the Tonga Arc, and also the second reported species of the genusParaglypturus.