A new species of Carinosquilla Manning, 1968, C. mclaughlinae n. sp., is described from the Seychelles. It is readily distinguished from its congeners by the spinulose dorsal surface of the sixth abdominal somite, and telson. Carinosquilla mclaughlinae n. sp. is the tenth known species of the genus. Phylogenetic relationships within Carinosquilla are investigated by cladistic analysis. Results support monophyly of the genus, and the synonymy of Keijia Manning, 1995 with Carinosquilla.
Crustacea, Stomatopoda, Squillidae, Carinosquilla, Indian Ocean, new species.