Chaetognaths of the Southern Ocean

This dataset is a scanned copy of ANARE Research Notes 2, which describes the Chaetognaths of the Southern Ocean. The synonymy, diagnostic characters, geographical and bathymetric distribution of each species is given together with an illustration of body, head and a seminal vesicle, and a distribution map.Taken from the abstract:The Southern Ocean chaetognath fauna comprises Sagitta gazellae (Ritter-Zahony), S. marri (David) and Eukrohnia bathyantarctica (David) which are endemic species; S. macrocephala (Fowler), S. maxima (Conant), E. hamata (Mobius) and Heterokrohnia mirabilis (Ritter-Zahony) which are species common to other regions which maintain themselves in the area; and S. decipiens (Fowloer), S. hexaptera (D'Orbigny), S. lyra (Krohn), S. minima (Grassi), S. planctonis (Steinhaus), S. serratodentata (Krohn), Krohnitta subtilis (Grassi), E. fowleri (Ritter-Zahony) and E. bathypelagica (Alvarino) which are exotic tropical or sub-tropical species, unable to reproduce in the area. The synonymy, diagnostic characters, geographical and bathymetric distribution of each species is given together with an illustration and a distribution map. Keys are provided for the identification of the genera and species from the Southern Ocean and adjacent waters.The phylum Chaetognatha is small, consisting of seventy to eighty species belonging to about eight genera. The chaetognaths, commonly known as arrow-worms, are frequently found in the plankton. The entire phylum is marine, and except for the benthic genus Spadella, all arrow-worms are adapted for a planktonic existence.The document is available for download as a pdf from the provided URL.