Markhaseva E.L.1, Renz J.2 2019. Two new calanoids (Copepoda: Aetideidae) from the abyss of the World Ocean // Arthropoda Selecta. Vol.28. No.2: 213–224 [in English].
1 Zoological Institute, Russian Academy of Sciences, Universitetskaya nab. 1, St. Petersburg 199034, Russia. E-mail: markhaseva@yahoo.com
2 German Center for Marine Biodiversity Research (DZMB), Senckenberg am Meer, Martin-Luther-King Platz 3, 20146 Hamburg, Germany.
doi: 10.15298/arthsel. 28.2.04
ABSTRACT. Two new aetideid species, Paracomantenna profunda sp.n. and Prolutamator pseudohadalis sp.n. are described after females collected in the abyss in the vicinity of the sea bed of the World Ocean. Both new species are described from the same type locality in the Kurile-Kamchatka Trench. The new species of Paracomantenna Campaner, 1978 was the most numerous among aetideids in the samples from of the Kurile-Kamchatka Trench and its several specimens were found in the samples from the Weddell Sea and the Atlantic Ocean. Two groups of species are recognized in Paracomantenna and the new species is attributed to the group of the small sized species. It differs from these small sized congeners in the only slightly enlarged surface spines at the maxilla endites and some details of the oral parts setation. Paracomantenna profunda sp.n. shows high variability in the shape of spermathecae and prosome posterior corners and slight variability is observed in the segmentation, setation and ornamentation of the antenna, maxillule, maxilliped and P1. The taxonomic status of the only described male of Paracomantenna is discussed. The genus Prolutamator Markhaseva et Schulz, 2008 is for the first time found in the Pacific Ocean and the new species of the genus from the Kurile-Kamchatka Trench differs from the congeners from the Weddell Sea and the Atlantic Ocean in the larger size, the shape of the spermathecae, and in a very short proximal posterior seta on the maxillule arthrite.
KEY WORDS: Calanoida, Clausocalanoidea, Paracomantenna, Prolutamator, benthopelagic, Kurile-Kamchatka Trench, abyss.