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- W2039467076 abstract "The Australian frog species Geocrinia laevis and G. victoriana are similar in external morphology, but have distinct calls. In contact areas of their ranges, they form narrow hybrid zones. Osteological investigations did not reveal any qualitative character allowing reliable species identification. Clear differences were found in skull proportions, but ranges of variation of the two species overlap. Head proportions show a gradual transition across the contact zones. Morphological aberrations did not occur in increased frequencies in the centre of a hybrid zone. High incidence of bilateral symmetry and localized occurrence of rare basipodial patterns indicate that these anomalies are not manifestations of developmental instability, but may have a specific genetic basis.ZusammenfassungOsteologische Variation bei Geocrinia laevis, Geocrinia victoriana, und ibren Hybridpopulationen (Amphibia, Anura, Myobatrachinae)Die australischen Froscharten Geocrinia laevis und G. victorianaahneln sich in ihrer auseren Morphologie, unterscheiden sich aber durch ihre Rufe. In Kontaktbereichen ihrer Areale bilden sie schmale Hybridzonen. Osteologische Untersuchungen erbrachten kein Merkmal, das sich zur einwandfreien Artbestimmung eignen konnte. Deutliche Unterschiede waren bei den Schadelproportionen zu erkennen, doch die Variationsbereiche der zwei Arten uberlappen einander. In der Kopfmorphologie zeigt sich der Ubergang durch die Kontaktzonen als eher flacher Merk-malsgradient. Morphologiscne Aberrationen treten im Zentrum einer Hybridzone nicht in er-hohter Haufigkeit auf. Etliche Falle bilateralsymmetrischen und lokal gehauften Vorkommens seltener Variationsmuster in Hand- und Fuswurzeln lassen es wahrscheinlich erscheinen, das diese Anomalien nicht ein Ergebnis geringer Entwicklungsstabilitat sind, sondern eine spezifi-sche genetische Basis haben." @default.
- W2039467076 created "2016-06-24" @default.
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- W2039467076 date "2009-04-27" @default.
- W2039467076 modified "2023-10-09" @default.
- W2039467076 title "Osteological variation in Geocrinia laevis, Geocrinia victoriana, and their hybrid populations (Amphibia, Anura, Myobatrachinae)" @default.
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- W2039467076 doi "https://doi.org/10.1111/j.1439-0469.1991.tb00674.x" @default.
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