Markhaseva E.L.1, Schulz K.2, Renz J.3 2010. New Scolecitrichidae (Copepoda: Calanoida) from deep Antarctic waters // Arthropoda Selecta. Vol.19. No.3: 113–121 [in English].

1 Russian Academy of Sciences, Zoological Institute; Universitetskaya nab. 1, 199034 St. Petersburg Russia. E-mail: copepoda@zin.ru

2 DZMB-Senckenberg, Biozentrum Grindel & Zoologisches Museum, Martin-Luther-King-Platz 3, D-20146 Hamburg Germany. E-mail: kschulz@zoologie.uni-hamburg.de; Jasmin.Renz@senckenberg.de

KEY WORDS: Copepoda, Calanoida, new genus, new species, benthopelagic, Antarctic deep sea.

ABSTRACT. A new clausocalanoidean benthopelagic genus and species, Diaiscolecithrix andeep, with sensory setae on maxilla and maxilliped is described from the Southern Ocean deep waters close to the sea bed and placed in the clausocalanoidean family Scolecitrichidae. The new genus is well defined from all scolecitrichid genera by a well developed oral cone-like structure, a single seta on the distal praecoxal endite of the maxilla, an elongate and slender gnathobase blade of the mandible and details of setation of the oral parts. Diaiscolecithrix gen.n. shares with Scolecitrichidae the setation of antenna and mandible palp, 3 worm-like and 5 brush-like sensory setae on the maxilla endopod, and a setal sequence of 1, 2, 1 on the praecoxal endites of the maxilliped syncoxa. Including Macandrewella Scott, 1909, Scolecitrichopsis Vyshkvartzeva, 2000, and Omorius Markhaseva et Ferrari, 2005, that all share this combination of characters, the new genus is the fourth representative of Scolecitrichidae found in the benthic boundary layer.

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