The Indo-Pacific Pilumnidae XII. On the familial placement of Chlorodiella bidentata (Nobili, 1901) and Tanaocheles stenochilus Kropp, 1984 using adult and larval characters with the establishment of a new subfamily, Tanaochelinae (Crustacea: Decapoda: Brachyura)

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Abstract
Within the Xanthoidea, Chlorodiella bidentata (Nobili, 1901) had been assigned to the Xanthidae MacLeay, 1838 and Tanaocheles stenochilus Kropp, 1984, to the Trapeziidae Miers, 1886. The adult characters of these two species are re-appraised and are considered to be congeneric. The familial position of Tanaocheles is reviewed and the genus does not conform to the diagnosis of the Xanthidae or Trapeziidae. The taxon is, therefore, placed in the Pilumnidae Samouelle, 1819, sensu Guinot, 1978, and assigned to a new subfamily. The first stage zoeal chaetotaxy of C. bidentata supports the adult revision at the family level.

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