<i>Trochulus oreinos</i> and <i>T. hispidus</i> (Gastropoda: Pulmonata: Hygromiidae) in the Eastern Alps and adjacent areas: Morphology, ecology and their context to phylogeography. Duda, M., Sattmann, H., Haring, Elisabeth, & Kruckenhauser, L. December, 2012. abstract bibtex This study investigates the state of T. oreinos, a hitherto quite unknown endemic in the Eastern Alps, and of the highly variable T. hispidus/sericeus complex. Within the latter many divergent mitochondrial clades were revealed, raising the question whether they represent cryptic species or so far undiscovered morphologically differentiated variants. By combining investigations of shell morphology, genital anatomy and autecology we found high similarity between the two subspecies of T. oreinos, which are clearly separated from the T. hispidus/sericeus complex, to which they were originally assigned. Some new diagnostic traits allow even the unambiguous separation of the two T. oreinos ssp.. Both have the same stenoecous habitat preferences and are restricted to rocky high alpine areas in the north-eastern Austrian Alps. In contrast, representatives of the T. hispidus/sericeus complex are distributed over a wider altitudinal and geographic range, preferring moist areas and scrubby perennial herb vegetation. The nine different mitochondrial clades obtained in the genetic investigations showed neither morphological nor ecological separation. The T. hispidus/sericeus clades are intermingled with clades representing morphologically clearly defined species of the genus Trochulus, thus rendering T. hispidus as currently defined paraphyletic, while T. oreinos is clearly monophyletic. A comparison of all data implies different phylogeographic histories and Pleistocene distribution of the investigated species. In T. hispidus/sericeus high morphological and genetic variation indicate good dispersal abilities and a broad ecological niche suggesting glacial survival in several refuge areas. In contrast, the small genetic and morphological variation in T. oreinos is probably due to specific habitat requirements and poor dispersal ability. We assume that they evolved and outlived the glacial periods in their current restricted distibution range, being adapted to cooler climatic conditions.
@misc{duda_trochulus_2012,
address = {Klagenfurt, Austria},
type = {Talk},
title = {\textit{{Trochulus} oreinos} and \textit{{T}. hispidus} ({Gastropoda}: {Pulmonata}: {Hygromiidae}) in the {Eastern} {Alps} and adjacent areas: {Morphology}, ecology and their context to phylogeography},
abstract = {This study investigates the state of T. oreinos, a hitherto quite unknown endemic in the Eastern Alps, and of the highly variable T. hispidus/sericeus complex. Within the latter many divergent mitochondrial clades were revealed, raising the question whether they represent cryptic species or so far undiscovered morphologically differentiated variants. By combining investigations of shell morphology, genital anatomy and autecology we found high similarity between the two subspecies of T. oreinos, which are clearly separated from the T. hispidus/sericeus complex, to which they were originally assigned. Some new diagnostic traits allow even the unambiguous separation of the two T. oreinos ssp.. Both have the same stenoecous habitat preferences and are restricted to rocky high alpine areas in the north-eastern Austrian Alps. In contrast, representatives of the T. hispidus/sericeus complex are distributed over a wider altitudinal and geographic range, preferring moist areas and scrubby perennial herb vegetation. The nine different mitochondrial clades obtained in the genetic investigations showed neither morphological nor ecological separation. The T. hispidus/sericeus clades are intermingled with clades representing morphologically clearly defined species of the genus Trochulus, thus rendering T. hispidus as currently defined paraphyletic, while T. oreinos is clearly monophyletic. A comparison of all data implies different phylogeographic histories and Pleistocene distribution of the investigated species. In T. hispidus/sericeus high morphological and genetic variation indicate good dispersal abilities and a broad ecological niche suggesting glacial survival in several refuge areas. In contrast, the small genetic and morphological variation in T. oreinos is probably due to specific habitat requirements and poor dispersal ability. We assume that they evolved and outlived the glacial periods in their current restricted distibution range, being adapted to cooler climatic conditions.},
author = {Duda, Michael and Sattmann, Helmut and {Haring, Elisabeth} and Kruckenhauser, Luise},
month = dec,
year = {2012},
}
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Within the latter many divergent mitochondrial clades were revealed, raising the question whether they represent cryptic species or so far undiscovered morphologically differentiated variants. By combining investigations of shell morphology, genital anatomy and autecology we found high similarity between the two subspecies of T. oreinos, which are clearly separated from the T. hispidus/sericeus complex, to which they were originally assigned. Some new diagnostic traits allow even the unambiguous separation of the two T. oreinos ssp.. Both have the same stenoecous habitat preferences and are restricted to rocky high alpine areas in the north-eastern Austrian Alps. In contrast, representatives of the T. hispidus/sericeus complex are distributed over a wider altitudinal and geographic range, preferring moist areas and scrubby perennial herb vegetation. The nine different mitochondrial clades obtained in the genetic investigations showed neither morphological nor ecological separation. The T. hispidus/sericeus clades are intermingled with clades representing morphologically clearly defined species of the genus Trochulus, thus rendering T. hispidus as currently defined paraphyletic, while T. oreinos is clearly monophyletic. A comparison of all data implies different phylogeographic histories and Pleistocene distribution of the investigated species. In T. hispidus/sericeus high morphological and genetic variation indicate good dispersal abilities and a broad ecological niche suggesting glacial survival in several refuge areas. In contrast, the small genetic and morphological variation in T. oreinos is probably due to specific habitat requirements and poor dispersal ability. 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