Morphological and genetic description of Octopus insularis, a new cryptic species in the Octopus vulgaris complex (Cephalopoda: Octopodidae) from the tropical southwestern Atlantic |
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| Authors: | Leite, T. S. Haimovici, M. Molina, W. Warnke, K. |
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| Affiliation: | 1Oceanografia Biológica, Laboratório de Recursos Demersais e Cefalópodes, Fundação Universidade Federal do Rio Grande (FURG), Caixa Postal 474, Rio Grande/RS CEP 96201-900, Brazil; 2Departamento de Bioquímica e Genética, Universidade Federal do Rio Grande do Norte (UFRN), Brazil; and 3 Free University of Berlin, FR Paleontology, Berlin, Germany |
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| Abstract: | A medium-sized Octopus species is described based on materialcollected in shallow equatorial waters around the oceanic islandsof Fernando de Noronha Archipelago, Rocas Atoll, St Peter andSt Paul Archipelago and the mainland of northeastern Brazil.The new species, Octopus insularis, is described morphologically,and also characterized by the large mitochondrial subunit ribosomalRNA gene (mt 16S rDNA). The new species has relatively shortand stout arms, rugose reddish brown skin in preserved specimens,8 to 11 gill lamellae on the outer demibranchs, small ligula,characteristic symmetrical radula, spermatophore and beak, smalleggs and high fecundity (213,000 oocytes under 1.5 mm diameter).The habitats and skin patterns of living animals are brieflydescribed. The new species differs both morphologically andgenetically from Octopus vulgaris in the Mediterranean, Venezuelaand southern Brazil. (Received 10 November 2006; accepted 19 October 2007) |
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