Redescription of two species of the genus Leydigiopsis Sars, 1901 (Branchiopoda, Anomopoda, Chydoridae)статья
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Дата последнего поиска статьи во внешних источниках: 24 января 2020 г.
Аннотация:Two not sufficiently known South American cladoceran species, Leydigiopsis curvirostris Sars, 1901 and Leydigiopsis megalops Sars, 1901 were redescribed from the type material. Detailed morphology of the trunk limbs of these species and morphology of male of L. megalops were studied for the first time. Species of the genus Leydigiopsis combine obviously plesiomorphic characters – primitive morphology of head pores, male postabdomen similar to that in females, one, and apomorphic characters – long rostrum, antennules of unusual morphology, broad postabdomen with well developed posrtanal denticles. Analysis of morphology suggests that Leydigiopsis belongs to the group of the small tropical genera, like Euryalona, Tretocephala, long ago separated from the main trend of Aloninae and retaining numerous plesiomorphic characters.