Hansenomysis

Vicente, Carlos San, 2009, Hansenomysis sorbei n. sp., a new suprabenthic mysid (Crustacea: Mysida: Petalophthalmidae) from the Bellingshausen Sea (Southern Ocean), Zootaxa 2240, pp. 31-40 : 39

Key to species of Hansenomysis from the Southern Ocean

Adapted from O. Tattersall (1961), Bacescu (1971), Bravo & Murano (1997) and San Vicente & Sorbe (2008).

1.a. Acute rostrum on the carapace anterior margin ........................................ H. anaramosae San Vicente & Sorbe, 2008

1.b. Without rostrum on the carapace anterior margin ........................................................................................................ 2

2.a. Antennal scale with spines all along its outer margin .................................................. H. falklandica Tattersall, 1955

2.b. Antennal scale without spines on the distal part of its outer margin ........................................................................... 3

3.a. Postero-dorsal part of abdominal somites 3–6 produced into strong spines ......................................... H. sorbei n. sp.

3.b. Postero-dorsal part of abdominal somites 3–6 not produced into strong spines .......................................................... 4

4.a. Carapace with acute antero-lateral processes ............................................................ H. angusticauda Tattersall, 1961

4.b. Carapace with rounded antero-lateral angles ....................................................... H. antarctica Holt & Tattersall, 1906