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Free Content Isopods of the Genus Excorallana Stebbing, 1904 from the Gulf of California, Mexico (Crustacea, Isopoda, Corallanidae)

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The four species of Excorallana known from the Gulf of California, including two new species, are described and figured: Excorallana tricornis occidentalis Richardson, 1905; Excorallana truncata (Richardson, 1899); Excorallana bruscai n. sp.; and Excorallana houstoni n. sp. Excorallana kathyae Menzies, 1962, a species previously recorded from the Gulf (Menzies, 1962; Monod, 1969; Schultz, 1969; Brusca, 1980) was recently synonymized with E. truncata (Delaney, 1982).

Species of Excorallana have previously been distinguished by the morphology of the mouthparts and pereopods (Stebbing, 1904; Richardson, 1905). The presence of a small molar process and lacinia mobilis on the mandibles of Excorallana tricornis occidentalis, E. truncata and E. bruscai, previously unreported, supports Menzies et al. (1955) and Brusca's (1981) placement of the family Corallanidae between the Cirolanidae and the Aegidae in a proposed phylogenetic lineage of flabelliferan isopods.

A key to all known species of Excorallana is presented, along with comments on the ecology and biogeography of the genus.

Document Type: Research Article

Publication date: 1984-01-01

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  • The Bulletin of Marine Science is dedicated to the dissemination of high quality research from the world's oceans. All aspects of marine science are treated by the Bulletin of Marine Science, including papers in marine biology, biological oceanography, fisheries, marine affairs, applied marine physics, marine geology and geophysics, marine and atmospheric chemistry, and meteorology and physical oceanography.
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