Biochemical genetic evidence supporting the taxonomic separation ofLoligo edulis andLoligo chinensis (Cephalopoda: Teuthoidea) from the genusLoligo |
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| Authors: | A S Brierley A L Allcock J P Thorpe M R Clarke |
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| Institution: | (1) Port Erin Marine Laboratory, Department of Environmental and Evolutionary Biology, University of Liverpool, IM9 6JA Isle of Man, British Isles;(2) Present address: British Antarctic Survey, Natural Environment Research Council, High Cross, Madingley Road, CB3 0ET Cambridge, UK |
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| Abstract: | Confusion abounds regarding the relative generic status of many member species of the squid family Loliginidae. A taxonomie reorganisation within the family has been proposed in whichLoligo species from the Indo-Pacific possessing photophores on the ink sac, includingLogligo edulis andLoligo chinensis, are removed to the newly created genusPhotololigo. This system of classification has not however gained general acceptance, and some authors have continued to refer to these species asLoligo. Here biochemical genetic data gathered using allozyme electrophoresis are presented supporting the assertion thatL. edulis andL. chinensis should indeed be positioned in a genus distinct from that characterised by the type speciesLoligo vulgaris vulgaris. Cluster analysis of allele frequency data from 22 putative enzyme-coding loci suggests thatL. edulis andL. chinensis are as genetically distant fromL. vulgaris vulgaris as are members of the confamilial generaAlloteuthis, Uroteuthis andSepioteuthis, and as such warrant separate generic status. We conclude that the genusPhotololigo is valid. |
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