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Phylogeny of the Cocculinoidea (Mollusca, Gastropoda)
Author(s) -
Strong Ellen E.,
Harasewych M.G.,
Haszprunar Gerhard
Publication year - 2003
Publication title -
invertebrate biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.486
H-Index - 42
eISSN - 1744-7410
pISSN - 1077-8306
DOI - 10.1111/j.1744-7410.2003.tb00077.x
Subject(s) - biology , paraphyly , monophyly , synapomorphy , taxon , phylogenetic tree , gastropoda , zoology , phylogenetics , cladistics , evolutionary biology , ecology , clade , biochemistry , gene
. The superfamily Cocculinoidea is a group of marine, deep‐water, limpet‐like gastropods. Recent speculation surrounding their affinities has concentrated on their placement within the Gastropoda. However, phylogenetic relationships within the Cocculinoidea, especially the monophyly of families and genera within the group, remain poorly understood. Phylogenetic analysis of 31 morphological characters for 15 cocculinoidean taxa and 2 outgroups resulted in a single most parsimonious tree, length=70, CI=0.62, and RI=0.71. Monophyly of the Cocculinoidea, Cocculinidae, and the genera Cocculina and Coccopigya was supported; Paracocculina and Coccocrater were found to be paraphyletic. Character optimization demonstrates that many characters often cited as diagnostic of various taxa, are often homoplastic and/or synapomorphies at different hierarchical levels.