{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,18]],"date-time":"2025-10-18T20:43:02Z","timestamp":1760820182777},"reference-count":32,"publisher":"Cambridge University Press (CUP)","issue":"3","license":[{"start":{"date-parts":[[2009,10,19]],"date-time":"2009-10-19T00:00:00Z","timestamp":1255910400000},"content-version":"unspecified","delay-in-days":0,"URL":"https:\/\/www.cambridge.org\/core\/terms"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["J. Mar. Biol. Ass."],"published-print":{"date-parts":[[2010,5]]},"abstract":"<jats:p>Eight populations of <jats:italic>Caprella penantis<\/jats:italic>, three of <jats:italic>Caprella dilatata<\/jats:italic> and two of <jats:italic>Caprella andreae<\/jats:italic>, collected from different sites all over the world, were selected for genetic study. Thirteen primers were tested, and the phenogram, based on the similarity coefficient of Nei &amp; Li and the UPGMA method, separated clearly <jats:italic>C. dilatata<\/jats:italic> and <jats:italic>C. andreae<\/jats:italic> from the populations of <jats:italic>C. penantis<\/jats:italic>, supporting the validity of these three species, traditionally considered altogether under the old \u2018acutifrons\u2019 complex. Populations of <jats:italic>C. penantis<\/jats:italic> (including, at least, forms <jats:italic>simulatrix, testudo<\/jats:italic> and <jats:italic>lusitanica<\/jats:italic>) from Spain, Portugal, Morocco, Japan and Brazil were clustered together in the RAPD analysis, indicating that, probably, all the specimens of <jats:italic>C. penantis<\/jats:italic> could belong to the same species, in spite of morphological variations in the pleura, gills, robustness and presence\/absence of proximal projection in adult male gnathopod 2 propodus. The only population which showed genetic differentiation within the <jats:italic>C. penantis<\/jats:italic> complex was the form <jats:italic>gibbosa<\/jats:italic> from Coquimbo, Chile. Future analysis based on different molecular approaches (mtDNA, 18S rRNA, ISSR) and additional material from other world areas, should be conducted to confirm these results.<\/jats:p>","DOI":"10.1017\/s0025315409990828","type":"journal-article","created":{"date-parts":[[2009,10,19]],"date-time":"2009-10-19T09:33:14Z","timestamp":1255944794000},"page":"617-622","source":"Crossref","is-referenced-by-count":10,"title":["Exploring molecular variation in the cosmopolitan <i>Caprella penantis<\/i> (Crustacea: Amphipoda): results from RAPD analysis"],"prefix":"10.1017","volume":"90","author":[{"given":"M. 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