Portal de Periódicos da CAPES

REVISION OF THE GENUS DAPHNIOPSIS SARS, 1903 (CLADOCERA: DAPHNIIDAE) AND A DESCRIPTION OF DAPHNIOPSIS CHILENSIS, NEW SPECIES, FROM SOUTH AMERICA

1986; Oxford University Press; Volume: 6; Issue: 2 Linguagem: Inglês

10.1163/193724086x00073

1937-240X

Brenda J. Hann,

Aquatic Invertebrate Ecology and Behavior

Daphniopsis chilensis, new species, is described from the highest known body of fresh water in the world, Crater Lake, Licancabur Volcano, Chile. Significant morphological differentiation among the species of the genus exists with respect to: antennule structure, headshield shape, ventral carapace setation, postabdomen shape and armature (both female and male), postabdominal processes, and claw setation. In a comparison of Daphniopsis with other daphniid genera, the close similarity to Daphnia (but not to Simocephalus) is demonstrated using common features of external morphology, as well as limb structure. Diagnostic characteristics are provided for the genus, the most distinctive being the structure and orientation of the ephippium. The known distribution of the genus (Tibet, Australia, Antarctica, several Antarctic islands) is extended to include South America, strongly supporting its presumed Gondwanaland origin.