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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
agricultural and biological sciences
Systematics of Alloteuthis (Cephalopoda:Loliginidae) based on molecular and morphometric data
Journal of Experimental Marine Biology and Ecology, Volume 364, No. 2, Year 2008
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Description
Alloteuthis is a group of small, slender loliginid squids of minor fisheries importance. There are three nominal Alloteuthis species-A. media (Linnaeus), A. subulata (Lamarck) and A. africana Adam. Two of these species (A. media and A. subulata) have largely overlapping ranges in the Mediterranean and northeastern Atlantic, while A. africana is found along the west coast of Africa. Despite the low level of species diversity, Alloteuthis taxonomy and systematics are confused, and assignment of specimens to species can be difficult. To clarify Alloteuthis systematics, we gathered morphometric data and DNA sequence data from two mitochondrial loci and a nuclear locus from Alloteuthis specimens collected from several localities. Analyses of the morphometric data suggest that head width is the main variable allowing separation of A. africana from the other two species, and central club sucker size separates A. media from A. subulata. One easily diagnosable character often used to distinguish Alloteuthis species-relative fin length-appears to be of little taxonomic value. Only three specimens assignable to A. subulata both morphologically and genetically were found, all from the Adriatic; possible reasons for this apparent rarity are discussed. Gene tree parsimony and coalescent-based methods were used to estimate species relationships from the molecular data, and both supported a sister-species relationship between A. media and A. subulata. Analyses of molecular variation (AMOVA's) revealed significant genetic differentiation between Atlantic and Mediterranean A. media. This study highlights the importance of 1) sampling multiple individuals, locations and loci for species-level phylogenetic studies, 2) using morphometric analyses to reveal taxonomically meaningful morphological characters and 3) accounting for the stochastic nature of the coalescent process when estimating species phylogenies for closely related taxa. © 2008 Elsevier B.V. All rights reserved.
Authors & Co-Authors
Anderson, Frank E.
United States, Carbondale
Southern Illinois University Carbondale
Pilsits, Adria
United States, St. Louis
Saint Louis University
Clutts, Stephanie A.
United States, Carbondale
Southern Illinois University Carbondale
Laptikhovsky, Vladimir V.
Falkland Islands (malvinas), Port Stanley
Falkland Islands Government Fisheries Department
Bello, Giambattista
Italy, Bari
Arion
Balguerías, Eduardo
Spain, Santa Cruz de Tenerife
Csic-ieo-coc - Centro Oceanográfico de Canarias
Lipiński, Marek R.
South Africa, Cape Town
Marine and Coastal Management
Nigmatulin, Chingis
Russian Federation, Kaliningrad
Atlantic Research Institute of Fisheries and Oceanography
Pereira, João M.F.
Portugal, Lisbon
Instituto Português do Mar e da Atmosfera
Piatkowski, Uwe
Germany, Kiel
Geomar - Helmholtz-zentrum Für Ozeanforschung Kiel
Robin, Jean Paul
France, Caen
Université de Caen Normandie
Salman, Alp
Turkey, Izmir
Ege Üniversitesi
Tasende, Manuel García
Spain, Santiago de Compostela
Unidade Técnica de Pesca de Baixura Utpb
Statistics
Citations: 31
Authors: 13
Affiliations: 12
Identifiers
Doi:
10.1016/j.jembe.2008.07.026
ISSN:
00220981
Research Areas
Cancer
Genetics And Genomics