NARMS source details

Maltagliati, Ferruccio; Casu, Marco; Castelli, Alberto. (2004). Morphological and genetic evidence supports the existence of two species in the genus Ophelia (Annelida, Polychaeta) from the Western Mediterranean. Biological Journal of the Linnean Society. 83(1): 101-113.
240867
10.1111/j.1095-8312.2004.00374.x [view]
Maltagliati, Ferruccio; Casu, Marco; Castelli, Alberto
2004
Morphological and genetic evidence supports the existence of two species in the genus <i>Ophelia</i> (Annelida, Polychaeta) from the Western Mediterranean
Biological Journal of the Linnean Society
83(1): 101-113
Publication
World Polychaeta Database (WPolyDb)
About 900 individuals of the intertidal polychaete Ophelia cf. bicornis were collected at four sandy beaches in Corsica, ten in Sardinia and one in Tuscany (Western Mediterranean). They were analysed morphologically and genetically to clarify the taxonomic status of the littoral species of Ophelia in the study area and to assess the population genetic structuring. Two morphotypes were distinguished on the basis of the number of nephridiopore pairs (five or six). Genetic distances, F-statistics and analysis of molecular variance based on eight allozyme genetic markers were consistent in showing the two morphotypes to separate at species level. Thus, the two morphotypes which most authors have included in O. bicornis s.l. are not one morphologically variable taxon, but instead constitute two valid species, namely O. bicornis Savigny, 1818, with six pairs of nephridiopores, and O. barquii Fauvel, 1927, with five pairs of nephridiopores. Mechanisms of ecological speciation in a background of gene flow can be taken into account to explain the origin of the two species. Moderate genetic differentiation was found among populations within each species, suggesting that dispersal may not be effective over large distances, or that local selection plays an important role in population differentiation.
Italy
Mediterranean
Molecular systematics, Molecular biology
Morphology
Systematics, Taxonomy
RIS (EndNote, Reference Manager, ProCite, RefWorks)
BibTex (BibDesk, LaTeX)
Date
action
by
2016-09-24 21:44:16Z
created

Ophelia barquii Fauvel, 1927 (additional source)