Abstract
The study of heleoplankton samples collected in an experimental ricefield in the province of Reggio Emilia (Northern Italy) evidenced a successional pattern of cladoceran species, characterized by the dominance of Moinidae in the early phase the rice cultivation (from May to July). In particular a species new for Italy,Monia weismanni Ishikawa, 1896, typical of Far East ricefields, was found; it was probably introduced into Italy with seeds and constitutes a stable element of the heleoplankton biocoenosis. The population co-occurs withMoina brachiata, Moina affinis, andMoina micrura in the ricefield. In this short noteM. weismanni is described, pointing out the morphological differences with other populations of the same species and with similar species; furthermore, life cycles in Moinidae are analysed in comparison with those of the other dominant cladocerans.
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Margaritora, F.G., Ferrari, I. & Crosetti, D. A Far East Moina,M. weismanni Ishikawa, 1896 found in an Italian ricefield. Hydrobiologia 145, 93–103 (1987). https://doi.org/10.1007/BF02530269
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DOI: https://doi.org/10.1007/BF02530269