| Authors: |
Martin Haase
and Thomas Wilke
and Paul Mildner
|
| Tags: |
Bythinella
Carinthia
DNA-barcoding
DNA-taxonomy
IFZ
Slovenia
cryptic_species
glacial_colonization
paraphyly
post
punctuated_equilibrium
|
| Abstract: |
The genus Bythinella comprises many species throughout Europe, but
species delimitation, traditionally based on shell morphology and
genital anatomy, is often a matter of debate. Out of an ongoing
large-scale project on the phylogeny of the genus, we analyzed the
relationships of species occurring in the south Austrian province
Carinthia and in neighboring Slovenia as a model for similar cases of
systematic and taxonomic ambiguity. Our analyses based on sequence data
of a fragment of COI comprising 638 bp, morphological and anatomical
investigations confirmed the presence of three species, B. opaca
(Gallenstein, 1848), B. robiciana (Clessin, 1890) and B. angelitae nom.
nov. for B. opaca ( Frauenfeld, 1857). The latter, while genetically
distinct, is morphologically and anatomically cryptic in that it can
only be distinguished from B. opaca by the denticulation of the radular
marginal teeth. B. robiciana, on the other hand, is morphologically
well defined, but genetically not separable from B. opaca, its stem
species. Thus, taxonomy in Bythinella has to be based on the
integration of morphology, anatomy and genetics. Our phylogenetic
analyses suggest that B. opaca has colonized Carinthia, which has
largely been covered by glaciers during the last ice age, along two
routes, one from the south and a second one from the southeast. |
@article{ISI:000249119200001,
title = {Identifying species of Bythinella (Caenogastropoda: Rissooidea): A plea for an integrative approach},
author = {Martin Haase and Thomas Wilke and Paul Mildner},
journal = {ZOOTAXA},
number = {1563},
pages = {1-16},
year = {2007},
abstract = {The genus Bythinella comprises many species throughout Europe, but
species delimitation, traditionally based on shell morphology and
genital anatomy, is often a matter of debate. Out of an ongoing
large-scale project on the phylogeny of the genus, we analyzed the
relationships of species occurring in the south Austrian province
Carinthia and in neighboring Slovenia as a model for similar cases of
systematic and taxonomic ambiguity. Our analyses based on sequence data
of a fragment of COI comprising 638 bp, morphological and anatomical
investigations confirmed the presence of three species, B. opaca
(Gallenstein, 1848), B. robiciana (Clessin, 1890) and B. angelitae nom.
nov. for B. opaca ( Frauenfeld, 1857). The latter, while genetically
distinct, is morphologically and anatomically cryptic in that it can
only be distinguished from B. opaca by the denticulation of the radular
marginal teeth. B. robiciana, on the other hand, is morphologically
well defined, but genetically not separable from B. opaca, its stem
species. Thus, taxonomy in Bythinella has to be based on the
integration of morphology, anatomy and genetics. Our phylogenetic
analyses suggest that B. opaca has colonized Carinthia, which has
largely been covered by glaciers during the last ice age, along two
routes, one from the south and a second one from the southeast.},
issn = {1175-5326},
keywords = {Bythinella Carinthia DNA-barcoding DNA-taxonomy IFZ Slovenia cryptic_species glacial_colonization paraphyly post punctuated_equilibrium }
}
::