An assessment of the genus Columbella Lamarck, 1799 (Gastropoda: Columbellidae) from eastern Atlantic

Three species of the neogastropod genus Columbella Lamarck, 1799 are recognised from the northeastern Atlantic and the Mediterranean. One is the common Mediterranean C. rustica (Linnaeus, 1758), with paucispiral protoconch, extending its range in the Atlantic South to Senegal and North to Portugal. Columbella adansoni Menke, 1853, with multispiral protoconch is restricted to the Macaronesian archipelagoes. A third species, also with multispiral protoconch, from West Africa is recognised through molecular methods, and the name C. xiphitella Duclos, 1840 is employed by correcting the original erroneous locality (“Californie”) to Gabon. Except for protoconch features, no major morphological characters are available to separate the three species; however diagnostic species-level differences in specific positions in the cytochrome c oxidase I (COI) sequences are present between all three species

De l’identité de <i>Graphicomassa albina</i> (Kiener, 1841) (Gastropoda: Columbellidae)

L’examen du matériel type de Columbella albina Kiener, 1841, indique que cette espèce nominale est un synonyme de Graphicomassa ligula (Duclos, 1840), ce qui soulève la question du nom sous lequel doit être désignée l’espèce appelée jusqu’ici Graphicomassa albina (Kiener, 1841). Celle-ci est très variable, ce qui a causé l’établissement de nombreux synonymes ; le plus ancien, Colombella adiostina Duclos, 1840, devient maintenant le nom valide de ce taxon. Les deux espèces indo-pacifi­ques Graphi­comassa ligula et G. adiostina n. comb. sont discutées et comparées.Investigation of the types of Columbella albina Kiener, 1841 indicate that this species is a junior synonym of Graphicomassa ligula (Duclos, 1840), leaving the species typically identified as Graphicomassa albina (Kiener, 1841) without a name. The species is quite variable and has inspired a number of synonyms over the years; the oldest of these, Colombella adiostina Duclos, 1840, now becomes the basis for the valid name for this species. In this paper, Graphicomassa ligula and G. adiostina n. comb. are both discussed comparatively.</p

Sexually dimorphic radular morphology in Euplica varians and E. versicolor (Neogastropoda : Columbellidae)

Volume: 24Start Page: 179End Page: 18

Graphicomassa Iredale 1929

Genus &lt;i&gt;Graphicomassa&lt;/i&gt; Iredale, 1929 &lt;p&gt; TYPE SPECIES. &mdash; &lt;i&gt;Colombella ligula&lt;/i&gt; Duclos, 1840, by original designation.&lt;/p&gt;Published as part of &lt;i&gt;deMAINTENON, Marta J., 2016, On the identity of Graphicomassa albina (Kiener, 1841) (Gastropoda: Columbellidae), pp. 43-48 in Zoosystema 38 (1)&lt;/i&gt; on page 44, DOI: 10.5252/z2016n1a2, &lt;a href="http://zenodo.org/record/4578048"&gt;http://zenodo.org/record/4578048&lt;/a&gt

Late reproductive system development in two Cephalaspideans (Gastropoda Mikkelsen & Mikkelsen, 1984

Volume: 44Start Page: 237End Page: 26

Molecular phylogeny of Columbellidae (Gastropoda: Neogastropoda)

The neogastropod family Columbellidae is a highly successful group of small, primarily epibenthic marine snails distributed worldwide and most abundant in the tropics. The great diversity of the group makes them attractive for studying evolutionary shifts in gastropod anatomy, morphology, ecology and diversity. The existing classification of the family has been based to a large degree on the morphology of the shell and radula. Indeed, membership in the family is traditionally confirmed using the unique morphology of the radula. To reconstruct columbellid phylogeny and assess monophyly of the group, we assembled a multilocus dataset including five mitochondrial and nuclear genes, for 70 species in 31 genera. Phylogenetic analyses using Bayesian inference and maximum likelihood are not well enough resolved to support a subfamilial classification, but do support the monophyly of the family and of several well-defined genera and supra-generic groupings. Two of the most diverse nominal genera, Mitrella and Anachis, are supported as highly polyphyletic. Overall, the resulting topologies indicate that the generic and subfamilial classification is in need of extensive revision but that phylogenomic data are needed to resolve columbellid relationships