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Accueil du site → Doctorat → Allemagne → Taxonomy and Molecular Phylogeny of Hemidactylus in the mainland of Yemen (Class : Reptilia, Order : Squamata, Family : Gekkonidae)

Technischen Universität Carolo-Wilhelmina zu Braunschweig (2011)

Taxonomy and Molecular Phylogeny of Hemidactylus in the mainland of Yemen (Class : Reptilia, Order : Squamata, Family : Gekkonidae)

Busais, Salem Mahfoudh Salem

Titre : Taxonomy and Molecular Phylogeny of Hemidactylus in the mainland of Yemen (Class : Reptilia, Order : Squamata, Family : Gekkonidae)

Auteur : Busais, Salem Mahfoudh Salem

Université de soutenance : Technischen Universität Carolo-Wilhelmina zu Braunschweig

Grade : Doktors der Naturwissenschaften (Dr.rer.nat) 2011

Résumé partiel
Yemen has a highly specialized fauna and flora of peculiar interest to taxonomic researchers and to evolutionary biologists. Yemen contains a variety of habitats which range from coastal mangroves, shrub lands and dunes along the coastal plains to the eastern deserts and an array of mountain habitats that reach elevations around 3666 m at the tip of the mountain of Jabal Al-Nabi Shauib, the highest point in the Arabian Peninsula. This unique geographical position at the junction point of the Red sea and Arabian Sea has given Yemen different climatic features and topographic areas. These features are favorable for the existence of diverse ecosystems along with a high level of biodiversity, in that way the country has a rich and diverse fauna and flora. There is still need for systematics and phylogenetic studies for the classification of reptiles in Yemen as well as other animals. For that reason, this study is important to clarify the taxonomic status of the genus Hemidactylus in the mainland of Yemen. This study depends on both the morphological and molecular methods. The aim of this research is to identify specimens of Hemidactylus geckos collected from the mainland of Yemen using morphological and molecular approaches. Hemidactylus Oken, 1817 is widely distributed and considered one of the most species-rich genera of the family Gekkonidae. The recent information on the status of this genus is presented based on individuals of these geckos collected during the period 2007 to 2009 from several localities in the mainland. Morphometric and meristic data were included in discriminant function analyses (DFA) and principal component analyses (PCA) using the analysis program of SPSS for windows, version 18. To assess significant differences among taxa One-Way-ANOVA test and Independent-Samples T-test were performed. These results were confirmed by using the test of Mann-Whitney (U-test). The phylogenetic study of Yemeni Hemidactylus was based on 1465 base pairs of mitochondrial genes (736 bp cytochrome b and 370 bp 12S rRNA) and one nuclear gene (359 bp phosducin) from specimens of Hemidactylus in addition to several sequences from known species of Hemidactylus obtained from the Genbank. Two sequences of Hemidactylus angulatus from Niger were added as an outgroup, in addition to tissues extracted from known Socotran species obtained and classified previously by Prof. Dr. Ulrich Joger were analyzed throughout the study. The phylogenetic analysis clearly distinguishes eight monophyletic taxa of Hemidactylus in the mainland which can be assigned to three groups : three taxa are members of the H. yerburii group, two clades are members of the H. robustus group and three compose a new group of undescribed species. The present study indicates that there are ten taxa of known Hemidactylus species and undescribed species found in the mainland : Hemidactylus flaviviridis, H. sp. ‘jumailiae’, H. lemurinus, H. robustus, H. sp. ‘saba’, H. sinaitus, H. sp. ‘shihraensis’, H. sp. ‘ulii’ and two subspecies of H. yerburii : H. y. yerburii and H. yerburii ssp. ‘montanus’. The existence of H. turcicus, H. persicus and H. homoeolepis are discussed throughout the study. There is considerable evidence that H. turcicus has to be erased from the list of Yemeni mainland species. Further studies are required in the northeastern and eastern Yemen to confirm the existence of remaining species.

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