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A new species of the genus Athanas (Decapoda, Caridea, Alpheidae) Living in the burrows of a mantis shrimp

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A new stomatopod associate, Athanas squillophilus n. sp., is described and illustrated. It is a specialized form of the genus Athanas characterized by well-exposed eyes with less pigmented corneas, a well-developed pterygostomial spine, a rudimental exopod on the first pereopods, a smooth posterior margin of dactyli and propodi of the last three pereopods, and dense setae on the flexor margin of the chela of the first pereopods. The genus Pseudathanas shares the last character with the new species, but two spines on the anterior margin of the carapace and the smooth diaeresis exclude the new species from that genus. The new species is one of the northernmost alpheids, being known from southern Hokkaido. This is the second report of the association between an alpheid shrimp and a stomatopod.

Athanas squillophilus n. sp., nouvelle crevette associée à un stomatopode, est décrite et illustrée. Cette espèce spécialisée du genre Athanas est caractérisée par des yeux très saillants aux cornées peu pigmentées, une épine ptérygostomienne bien développée, un exopodite rudimentaire aux premiers péréiopodes, une marge postérieure lisse sur les dactyles et les propodes des trois dernières paires de péréiopodes ainsi que par des soies denses sur la marge concave de la pince des premiers péréiopodes. Le genre Pseudathanas partage ce dernier caractère avec cette nouvelle espèce, mais deux épines sur la marge antérieure de la carapace et la diérèse lisse exclut la nouvelle espèce de ce genre. Cette nouvelle espèce est un des Alpheidae remontant le plus vers le Nord, étant connue du sud de l'île de Hokkaïdo. Il s'agit du second signalement d'une association entre un Alpheidae et un stomatopode.


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