Новые бентопелагические веслоногие (Calanoida: Clausocalanoidea) из глубоководной части Японского моря

Е.Л. Мархасева

Труды Зоологического института РАН, 2023, 327(2): 263–287 · https://doi.org/10.31610/trudyzin/2023.327.2.263

Резюме

Два новых вида бентопелагических веслоногих рачков копепод из отряда Calanoida, объединяемых в группу «Брэдфордовских» семейств, Pseudophaenna japonica sp. nov. и Xantharus dubius sp. nov. описаны из придонных проб, собранных Российско-Немецкой глубоководной экспедицией (SoJaBio). Коллекции, в которых были найдены новые виды, собраны в 51 рейсе научно-исследовательского судна «Академик Лаврентьев» в Японском море в непосредственной близости от морского дна. Редкие роды каланоид Pseudophaenna Sars, 1902 и Xantharus Andronov, 1981 впервые отмечены для Японского моря, а также впервые описан и отмечен в этом море самец редкого вида аетидэид Bradyidius rakuma (Zvereva, 1977). Вид Pseudophaenna japonica sp. nov. является вторым видом, который описан для рода Pseudophaenna и отличается от своего единственного сородича рострумом из двух ветвей и лишенным щетинки XXII анцестральным сегментом антеннулы, а также деталями вооружения ротовых частей самки и строением пятой пары ног (P5) у диморфоных самцов. Вид Xantharus dubius sp. nov. описан по самцам и отличается от других видов рода размером сегмента антеннулы XXI, который не уменьшен в сравнении с анцестральными сегментами XXII и XXIII и большой крепкой и одноветвистой P5. В изученной коллекции придонных проб собранных экспедицией SoJaBio в 2010 в Японском море бентопелагическая фауна Calanoida была представлена только этими видами и все эти виды принадлежат к надсемейству Calanoida Clausocalanoidea.

Ключевые слова

бентопелагические, Bradyidius rakuma, Copepoda, глубоководье, Японское море, новые таксоны, Pseudophaenna japonica sp. nov., Xantharus dubius sp. nov.

Поступила в редакцию 30 ноября 2022 г. · Принята в печать 25 апреля 2023 г. · Опубликована 25 июня 2023 г.

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