A New Chaetognath Genus and Species, with Remarks on the Taxonomy and Distribution of Others.

摘要

Plankton collections from deep waters in the Caribbean Sea and the Gulf of Mexico contain noteworthy bathypelagic chaetognaths. A new genus, Bathybelos, and its type-species, Bathybelos typhlops, are described. The occurrence of deeply serrated hooks in young specimens of Eukrohnia bathyantarctica David, E. bathypelagica Alvarino, and E. proboscidea Furnestin and Ducret is reported. Eukrohnia bathypelagica is recorded for the first time from the Gulf of Mexico and the Caribbean Sea and E. proboscidea, from the Caribbean. Spadella hummelincki Alvarino, 1970, is put in synonymy to Spadella pulchella Owre, 1963. The validity of Krohnitta mutabbii Alvarino, 1969, is discussed. (Author)