Titre
A species delimitation approach in the Trochulus sericeus/hispidus complex reveals two cryptic species within a sharp contact zone.
Type
article
Institution
UNIL/CHUV/Unisanté + institutions partenaires
Périodique
BMC Evolutionary Biology
Auteur(s)
Dépraz, A.
Auteure/Auteur
Hausser, J.
Auteure/Auteur
Pfenninger, M.
Auteure/Auteur
Liens vers les personnes
Liens vers les unités
ISSN
1471-2148[electronic], 1471-2148[linking]
Statut éditorial
Publié
Date de publication
2009
Volume
9
Numéro
171
Première page
171
Peer-reviewed
Oui
Langue
anglais
Résumé
BACKGROUND: Mitochondrial DNA sequencing increasingly results in the recognition of genetically divergent, but morphologically cryptic lineages. Species delimitation approaches that rely on multiple lines of evidence in areas of co-occurrence are particularly powerful to infer their specific status. We investigated the species boundaries of two cryptic lineages of the land snail genus Trochulus in a contact zone, using mitochondrial and nuclear DNA marker as well as shell morphometrics. RESULTS: Both mitochondrial lineages have a distinct geographical distribution with a small zone of co-occurrence. In the same area, we detected two nuclear genotype clusters, each being highly significantly associated to one mitochondrial lineage. This association however had exceptions: a small number of individuals in the contact zone showed intermediate genotypes (4%) or cytonuclear disequilibrium (12%). Both mitochondrial lineage and nuclear cluster were statistically significant predictors for the shell shape indicating morphological divergence. Nevertheless, the lineage morphospaces largely overlapped (low posterior classification success rate of 69% and 78%, respectively): the two lineages are truly cryptic. CONCLUSION: The integrative approach using multiple lines of evidence supported the hypothesis that the investigated Trochulus lineages are reproductively isolated species. In the small contact area, however, the lineages hybridise to a limited extent. This detection of a hybrid zone adds an instance to the rare reported cases of hybridisation in land snails.
PID Serval
serval:BIB_6E4594B21383
PMID
Open Access
Oui
Date de création
2010-02-11T14:45:34.946Z
Date de création dans IRIS
2025-05-21T02:05:16Z
Fichier(s)![Vignette d'image]()
En cours de chargement...
Nom
BIB_6E4594B21383.P001.pdf
Version du manuscrit
published
Taille
487.9 KB
Format
Adobe PDF
PID Serval
serval:BIB_6E4594B21383.P001
URN
urn:nbn:ch:serval-BIB_6E4594B213831
Somme de contrôle
(MD5):5971fb51e72c95c7696d0961503b55cd