Biometric and Genetic Analysis of the Marine Rissoid Rissoa auriscalpium (Gastropoda, Prosobranchia) and its Ecological Implications |
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| Authors: | Rita Colognola Pietro Masturzo Giovanni Fulvio Russo Mlchele Scardi Daniele Vlnci Eugenio Fresi |
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| Institution: | Istituto di Genetica Biochimica ed Evoluzionistica (C. N. R.), Via Abbiategrasso 207, 1–27100 Pavia, Italy.;European Molecular Biology Laboratory, MeyerhofstraBe 1, D-6900 Heidelberg, FRG.;Laboratorio di Ecologia del Benthos (Stazione Zoologica di Napoli), Punta S. Pietro, 1–80077 Ischia Porto (Napoli), Italy. |
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| Abstract: | Abstract. Two forms of Rissoa auriscalpium were found in Posidonia oceanica beds around the Island of Ischia (Gulf of Naples). In order to investigate their taxonomical value and to quantify the discriminating features found, the radular, conchometric, genetic, and ecological features of the two forms were analyzed. Ecological observations showed that the distribution of the two forms is strongly correlated with hydrodynamic factors. |
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| Keywords: | Rissoa auriscalpium Rissoidae biometry electrophoresis ecology pro-toconchs radulae Posidonia oceanica Gulf of Naples Ischia Mediterranean |
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