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We surveyed the historical Faid Hema, Ha’il region in Saudi Arabia and identified 22 species of reptiles (17 lizards and five snakes). We recorded for the first time nine reptiles (six lizards and three snakes) in the Faid Hema. Of these, one lizard, Mesalina adramitana, and two snakes, Cerastes gasperetti and Walterinessia aegyptia, were reported for the first time for the entire Ha`il region. We recorded 50% of all species for the entire study area at one site, which may be because it had three different habitat types near it (the Jannin mountain, soft soil, and firm, sandy soil). The next highest number of species we found was at an open site with firm, sandy soils and with gravel (containing 45.5% of the total species recorded), followed by a site that contained only sand (36.4% of the total). The lowest number of species was reported at an agricultural site, with only 13.6% of the total species found.

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Une comparaison de l`herpétofaune du Maroc et de la Jordanie est esquissée. Ces deux pays ont été choisis parce qu`ils se situent aux extrémités ouest et est de la Méditerranée, et que j`ai eu l`opportunité d`y séjourner plusieurs fois. Bien que distants de 3 700 km l`un de l`autre, ces deux pays présentent de nombreuses affinités dans la composition de leurs herpétofaunes respectives. Ceci est dû entre autres à des configurations géographiques en partie comparables. En revanche, l`isolation des plaines de l`ouest Marocain par les chaînes de l`Atlas et l`influence océanique très marquée ont favorisé la persistance d`espèces relictuelles endémiques et la différentiation d`espèces distinctes de part et d`autre de l`axe atlasique, alors que la Jordanie ne comporte aucune espèce endémique à ce seul pays. Enfin, le Maroc est presque huit fois plus étendu que la Jordanie, ce qui n`est pas négligeable quand on s`intéresse à la richesse spécifique d`un pays. En effet, le Maroc compte au moins 119 espèces d`amphibiens et de reptiles et la Jordanie, 100 espèces. Dans l`état actuel des connaissances taxonomiques, 13 espèces sont encore considérées comme les mêmes au Maroc et en Jordanie, presque toutes cependant représentées par des sous-espèces bien différenciées et/ou par des lignées très divergentes. Trente-deux genres sont communs aux deux pays, dont beaucoup sont des taxons des régions arides et désertiques, zones toutes plus ou moins reliées entre elles et non séparées par des barrières géographiques très anciennes. Vingt-sept genres présents au Maroc sont inconnus en Jordanie et 24 genres présents en Jordanie sont inconnus au Maroc. Contrairement aux similitudes des deux herpétofaunes, les différences sont surtout marquées chez les espèces méditerranéennes, auxquelles se joignent quelques éléments afro-tropicaux absents de Jordanie. Plusieurs exemples de couples d`espèces Maroc / Jordanie ont été commentés sur la base de photos originales prises dans les deux pays. Le genre Mesalina a fait l`objet d`une attention particulière, avec la mise en évidence de deux espèces supplémentaires pour la Jordanie: Mesalina bahaeldini et M. microlepis.

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In this study we review the species of lizards in the genus Mesalina (Lacertidae) and present a new key for their identification. We also obtained five photos of each species from the British Museum of Natural History that illustrate the dorsal, lateral (right and left), and ventral views of the head and the femoral pores of each species. The papers with the original descriptions of each species were reviewed and used in preparation of the key. Some remarks about the habitat, natural history, updated distribution map and previous taxonomic changes are explained.

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Aim We explored the phylogenetic relationships of species of Mesalina, using one nuclear and two mitochondrial loci. This genus of lacertid lizards is widely distributed in North Africa and the Middle East and our goal was to develop a scenario capable of explaining the current distribution and evolutionary patterns within the genus in the context of the wider historical biogeography of the region. Location North Africa and the Middle East. Methods The assembled dataset consisted of 193 Mesalina individuals, representing 12 species distributed across the geographical range of the genus. Bayesian and maximum likelihood methods were used to support phylogenetic inferences on two mitochondrial (cytochrome b and 16S ribosomal RNA) and one nuclear (beta-fibrinogen intron 7) markers. Palaeogeographical and palaeoclimatic data were used to support the inferred phylogeographical patterns. Results Mesalina lizards exhibit high genetic diversity and complex phylogenetic patterns, leading to an unsatisfactory systematic hypothesis of one paraphyletic and three polyphyletic traditional species. The estimated divergence times place the origin of the genus in the early Miocene (c. 22 Ma) and the divergence of most currently recognized species in the middle to late Miocene. The inferred ancestral distribution suggests that the genus and most of its species originated somewhere in Arabia or the Middle East, with the exception of the Mesalina olivieri complex, which may be of African origin. Main conclusions Phylogenetic reconstruction based on the three loci studied suggests a higher than expected cryptic diversity of Mesalina in North Africa and the Middle East. We suggest that the tectonic movements of the Arabian plate, coupled with the climatic changes occurring since the Miocene, may be responsible for the phylogeographical patterns of North African and Middle Eastern Mesalina.

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Mesalina is a widespread lacertid genus occurring throughout the Saharo-Sindian region from North Africa to Pakistan. It has been through a series of taxonomic revisions, but the phylogenetic relationships among the species remain unclear. In this study we estimate the phylogeographic structure of M. guttulata across most of its distributional range and we evaluate the relationships between M. guttulata and the sympatric species M. brevirostris and M. bahaeldini using partial mitochondrial DNA (mtDNA) sequences (cyt b and 16S). M. guttulata and M. brevirostris represent species complexes, whereas M. bahaeldini considered before as M. guttulata is a recently described species with very restricted distribution. Here we present the first evidence that M. guttulata is a paraphyletic taxon with respect to M. bahaeldini, while M. brevirostris proves to be a polytypic species or even a species complex, confirming previous studies. Although mtDNA markers have several properties that make them suitable for phylogeographic studies, they are not free of difficulties. Phylogeographic inferences within and between closely related species can be mislead by introgression and retention of ancestral polymorphism (incomplete lineage sorting). However, the present distribution pattern, the estimated times of divergence and the significant variation in morphology within M. guttulata led us to accept that the paraphyletic pattern observed, is most likely due to inaccurate taxonomy. Our hypothesis is that what has hitherto been considered as intraspecific variation, actually reflects species-level variation. Furthermore, our biogeographic analyses and the estimated time of divergences suggest that the present distribution of M. guttulata was the result of several dispersal and vicariant events, which are associated with historical changes (climatic oscillations and paleogeographic barriers) of late Miocene and Pliocene period.

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Aim To map and assess the richness patterns of reptiles (and included groups: amphisbaenians, crocodiles, lizards, snakes and turtles) in Africa, quantify the overlap in species richness of reptiles (and included groups) with the other terrestrial vertebrate classes, investigate the environmental correlates underlying these patterns, and evaluate the role of range size on richness patterns. Location Africa. Methods We assembled a data set of distributions of all African reptile species. We tested the spatial congruence of reptile richness with that of amphibians, birds and mammals. We further tested the relative importance of temperature, precipitation, elevation range and net primary productivity for species richness over two spatial scales (ecoregions and 1° grids). We arranged reptile and vertebrate groups into range-size quartiles in order to evaluate the role of range size in producing richness patterns. Results Reptile, amphibian, bird and mammal richness are largely congruent (r = 0.79–0.86) and respond similarly to environmental variables (mainly productivity and precipitation). Ecoregion size accounts for more variation in the richness of reptiles than in that of other groups. Lizard distributions are distinct with several areas of high species richness where other vertebrate groups (including snakes) are species-poor, especially in arid ecoregions. Habitat heterogeneity is the best predictor of narrow-ranging species, but remains relatively important in explaining lizard richness even for species with large range sizes. Main conclusions Reptile richness varies with similar environmental variables as the other vertebrates in Africa, reflecting the disproportionate influence of snakes on reptile richness, a result of their large ranges. Richness gradients of narrow-ranged vertebrates differ from those of widespread taxa, which may demonstrate different centres of endemism for reptile subclades in Africa. Lizard richness varies mostly with habitat heterogeneity independent of range size, which suggests that the difference in response of lizards is due to their ecological characteristics. These results, over two spatial scales and multiple range-size quartiles, allow us to reliably interpret the influence of environmental variables on patterns of reptile richness and congruency.

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Aim Body size is instrumental in influencing animal physiology, morphology, ecology and evolution, as well as extinction risk. I examine several hypotheses regarding the influence of body size on lizard evolution and extinction risk, assessing whether body size influences, or is influenced by, species richness, herbivory, island dwelling and extinction risk. Location World-wide. Methods I used literature data and measurements of museum and live specimens to estimate lizard body size distributions. Results I obtained body size data for 99% of the world`s lizard species. The body size–frequency distribution is highly modal and right skewed and similar distributions characterize most lizard families and lizard assemblages across biogeographical realms. There is a strong negative correlation between mean body size within families and species richness. Herbivorous lizards are larger than omnivorous and carnivorous ones, and aquatic lizards are larger than non-aquatic species. Diurnal activity is associated with small body size. Insular lizards tend towards both extremes of the size spectrum. Extinction risk increases with body size of species for which risk has been assessed. Main conclusions Small size seems to promote fast diversification of disparate body plans. The absence of mammalian predators allows insular lizards to attain larger body sizes by means of release from predation and allows them to evolve into the top predator niche. Island living also promotes a high frequency of herbivory, which is also associated with large size. Aquatic and nocturnal lizards probably evolve large size because of thermal constraints. The association between large size and high extinction risk, however, probably reflects a bias in the species in which risk has been studied.

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Faunal lists are important tools in ecology, biogeography, and conservation planning. Such lists can identify gaps in our knowledge of the distribution and taxonomy of regional faunas, and highlight issues needing further study. We present an up to date list of all land vertebrates occurring in Israel. We identify 786 species, of which 551 are birds, 130 are mammals, 97 are reptiles and eight are amphibians. Of these 369 species breed in Israel (including reintroductions), 199 (mostly birds) are regular visitors and 182 are accidental. Fourteen other species are invasive, and 22 species are extinct. We identify issues with the taxonomy and status of several species, and note recent developments in our understanding the Israeli land vertebrate fauna.

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New records of 20 reptile species and subspecies on the Red Sea coast of Sinai Peninsula and Eastern Desert in Egypt are given. A zoogeographical analyses of the herpetofauna and comparison of the species compositions re- sults to estimate the biodiversity for each subregion of Eastern Egypt. The faunal richness, taxonomic diversity and endemism level in hyperarid deserts of the Egypt are discussed. Mountainous South Sinai and southern part of the South Eastern Desert is suggested to consider as biodiversity hotspots in Eastern Egypt.

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The geographical distribution of reptiles is known to be climate dependent. Our analysis of literature data from the Palearctic confirmed that snakes, as a group (186 species), tend to extend further to the north, into cooler climate, than lizards (460 species). This has also been reported for the Nearctic. On a smaller scale, as a model, we investigated the expansion of reptiles from the warm southern desert of Israel northwards along the Jordan valley into cooler climate, based on 587 locality records of 17 species. It transpired that the snakes significantly extend further to the north than the lizards, paralleling and exemplifying the global scale. The ability of snakes to inhabit relatively cooler climates appears to accord with three physiological traits of snakes: lower optimal body temperatures, absence of temperature-dependent sex determination, and ability to thrive on infrequent meals.

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Mesalina are small diurnal lacertid lizards inhabiting arid areas from North Africa to northwestern India. Previous phylo- genetic studies have shown the existence of several species complexes within the genus, some of them with high levels of undiscovered diversity. In the present study, we carry out an integrative systematic revision of the Mesalina guttulata spe- cies complex using both molecular and morphological data from across its entire distribution range in North Africa, the Middle East and Arabia. The results of the genetic analyses indicate that M. guttulata and M. bahaeldini are two allopatric sister taxa separated by the Suez Canal and that the species complex includes a further three unnamed deep phylogenetic lineages, two of them restricted to southern and southwestern Arabia and described herein as Mesalina austroarabica sp. nov. and Mesalina arnoldi sp. nov., respectively. As a result of the lack of enough material, the third deep lineage, distrib- uted across Kuwait, Saudi Arabia and Jordan, is provisionally left undescribed. The two newly described species are char- acterized by their size, scale counts and tail coloration, as well as differences at the three mitochondrial and one nuclear gene analyzed in the present study.

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Aim: Deserts are generally perceived as areas of low diversity, and hence receive little attention from researchers and conservationists. Squamates are the dominant group of vertebrates in arid regions, and as such represent an ideal model to study biodiversity patterns in these areas. We examine spatial patterns of diversity, evolutionary history and endemism of terrestrial squamates of the Arabian Peninsula and test hypotheses on the role of topography and history of isolation so as to identify possible environmental drivers of diversification. Location: The Arabian Peninsula. Taxon: Squamate reptiles (Squamata; lizards and snakes). Methods: We generated distribution maps for all Arabian squamate species (including yet undescribed) and reconstructed their phylogenetic relationships using existing and newly produced genetic data for nearly all the species. We assessed patterns of the distribution of species richness, phylogenetic diversity and phylogenetic en demism across the peninsula to identify areas that could be considered evolutionary or endemicity hotspots for squamates. We evaluated community turnover across the peninsula and assessed the possible environmental drivers affecting the diversity of Arabian squamates in a regression framework. Results: The main hotspots of Arabian squamate diversity are mostly along the mountains that rim the peninsula while the most arid, central regions support a low diversity of species. The distribution of the phylogenetic diversity mirrors that of the species richness. Phylogenetic endemism is also highest in the mountains, especially when only endemic species are analysed. The deserts of northern Arabia are poor in terms of species richness and they show low connectivity to the peninsular communities. Topographic heterogeneity is the strongest predictor for Arabian squamates, followed by elevation. There is no correlation between richness and temperature. Main conclusions: The mountains of Arabia support rich and unique squamate communities that are dominated by local radiations of closely related and narrow-ranging species. In particular, the Asir Mountains of SW Arabia, Dhofar Province of Oman and the Hajar Mountains of northern Oman and UAE show unprecedented levels of squamate endemism and phylogenetic endemism. While many generalist species range across Arabia, a low number of species is shared between the peninsula and mainland Asia, indicating an effective isolation of the Arabian fauna. Squamate richness is highest in heterogeneous, topographically complex habitats.

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hese notes on some Egyptian lacertid lizards contribute to faunal data for the planning of biodiversity conservation. Mesalina bahaeldini curatorumn. subsp. is described from Suez, characterized by coloration and larger (fewer) body scales. Range extensions are documented for Acanthodactylus aegyptius, Mesalina olivieri, and M. rubropunctata. The previously reported occurrence of A. opheodurusin Sinai is doubted. The fact that the M. b. curatorum types were collected in the 1820s demonstrates the importance of museum collections.