Phylogenetic relationships of the carnivorous terrestrial snail family Streptaxidae (Stylommatophora: Achatinina) in Thailand and surrounding areas of Southeast Asia
Southeast Asia boasts a high diversity of carnivorous terrestrial snails in the family Streptaxidae. Six genera are now recognized in this region, mainly classified by the traditional characters of...
Abstract The deep divisions at the base of the stylommatophoran land snails and slugs have proved to be controversial, with the phylogenetic position of the Scolodontidae remaining unresolved. Here we present a phylogenetic analysis of 34 stylommatophoran genera based on a combined dataset (5782 sites) of four loci with the aim of resolving the position of the Scolodontidae and their relationship to the ‘achatinoid’ and ‘non-achatinoid’ clades. We also evaluate the phylogenetic utility of differ...
The land-snail genus Corilla is endemic to Sri Lanka and India’s Western Ghats. The ten extant Sri Lankan species belong to two distinct shell forms that are associated respectively with lowland and montane rainforest. We here present the first molecular phylogenetic analysis for Corilla. Our dataset includes nine nominal Sri Lankan species and is based on three mitochondrial genes (CO1, ND1 and 16S). Although the deeper nodes in the trees are not fully resolved, the results do suggest speciatio...
Last. Somsak Panha(Chula: Chulalongkorn University)H-Index: 15
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The family Streptaxidae in Laos is revised. Twelve species are known, mainly from limestone areas, in the genera Discartemon Pfeiffer, 1856, Perrottetia Kobelt, 1905, Haploptychius Mollendorff, 1906, and Indoartemon Forcart, 1946. Three new species, Perrottetia unidentata sp. n. and Perrottetia megadentata sp. n. from northern and central Laos, and Indoartemon diodonta sp. n. from central Laos, are described. All eight species of these three genera previously recorded from Laos are revised and d...
Last. Koichiro Tamura(Tokyo Metropolitan University)H-Index: 32
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Abstract We present the latest version of the Molecular Evolutionary Genetics Analysis (Mega) software, which contains many sophisticated methods and tools for phylogenomics and phylomedicine. In this major upgrade, Mega has been optimized for use on 64-bit computing systems for analyzing larger datasets. Researchers can now explore and analyze tens of thousands of sequences in Mega The new version also provides an advanced wizard for building timetrees and includes a new functionality to automa...
The camaenid genus Xanthomelon is widely distributed throughout the Australian Monsoon Tropics and eastern Queensland, with nine species currently being recognised in Australia based exclusively on shell features. Due to the combination of poor taxonomic descriptions and considerable variation in shell characters, considerable confusion surrounds the number of species in the Northern Territory (NT), their key characteristics and distributions. To uncover the full taxonomic diversity of Xanthomel...
Abstract We present a critical review of the fossil record of Cenozoic terrestrial gastropods of Europe utilizing a literature-based dataset comprising 1640 species from 609 sites. Net diversity (expressed as species, genus and family richness) and β-diversity (as species, genus and family turnover) reveal several major disruptive phases. Turnovers occurred at the Ypresian–Lutetian and Eocene–Oligocene boundaries, and extinction events took place at the Oligocene–Miocene, Burdigalian–Langhian an...
