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Genetic information plays a pivotal role in species recognition and delimitation, but rare or extinct animals can be difficult to obtain genetic samples from. While natural history wet collections have proven invaluable in the description of novel species, the use of these historical samples in genetic studies has been greatly impeded by DNA degradation, especially because of formalin-fixation prior to preservation. Here, we use recently developed museum genomics approaches to determine the status of an isolated population of the elapid snake genus Hemachatus from Zimbabwe. We used multiple digestion phases followed by single strand sequencing library construction and hybridisation capture to obtain 12S and 16S rDNA sequences from a poorly preserved tissue sample of this population. Phylogenetic and morphological analyses in an integrated taxonomic framework demonstrate that the Zimbabwean rinkhals population represents an old and highly distinct lineage, which we describe as a new species, Hemachatus nyangensis sp. nov. Our phylogenetic dating analysis is compatible with venom spitting having evolved in response to the threat posed by early hominins, although more data are required for a robust test of this hypothesis. This description demonstrates the power of museum genomics in revealing rare or even extinct species: Hemachatus from Zimbabwe are only known from a small area of the Eastern Highlands known for high endemism. No living specimens have been seen since the 1980s, most likely due to dramatic land-use changes in the Eastern Highlands, suggesting that the species could be extinct. In view of its recognition as a highly distinct lineage, urgent action is required to determine whether any populations survive, and to safeguard remaining habitat. [ABSTRACT FROM AUTHOR]

The sub-Saharan African file snake genus Gonionotophis is currently comprised of 15 species. However, the concept of this genus has been confounded by morphological and genetic differences between the constituent taxa. Due to the dearth of DNA samples, a taxonomic assessment has been impractical to date. We therefore sequenced two mitochondrial and one nuclear marker (16S, cyt b, and c-mos) from 45 samples representing ten species of Gonionotophis to construct a molecular phylogeny using Bayesian and likelihood approaches. Four divergent and well-supported clades were recovered, including: (1) grantii + brussauxi; (2) poensis + stenophthalmus; (3) nyassae; and (4) capensis, chanleri, crossi, guirali and savorgnani. Based on these results and morphological data, the genus Gonionotophis is restricted to the first clade, Mehelya is resurrected for the species in the second clade, and new genera are described for the remaining two clades. ZooBank—urn:lsid:zoobank.org:pub:A82CFAD6-E2E0-439E-90BB-9224E225426B [ABSTRACT FROM AUTHOR]

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. [ABSTRACT FROM AUTHOR]

We describe a new species ofZygaspisbased on a single specimen collected in north-eastern Mozambique and deposited in the Natural History Museum of Zimbabwe, Bulawayo. The new species is characterised by its extensively black pigmentation, 191 body annuli, discrete preoculars, four parietals, two postoculars, three supralabials, and two post-supralabials. Phylogenetic analysis of mtDNA suggests that it is a sister taxon to the widespreadZygaspis quadrifrons. ZooBank.—urn:lsid:zoobank.org:pub:9651A65E-949E-4C95-A363-81C558A222AC [ABSTRACT FROM AUTHOR]

On the basis of molecular data, the gekkonid lizardHomopholis arnoldiLoveridge is revived as a full species. Morphologically it is usually distinguishable fromH. wahlbergiion the basis of its striped dorsal colour pattern.Homopholis arnoldihas a wide distribution from south-eastern Botswana through Zimbabwe to central Mozambique, and the southern margin of its range covers the western and northern parts of Limpopo Province, South Africa north of the Soutpansberg (where it is at least parapatric, and possibly sympatric with bothH. wahlbergiiandH. mulleri), extending east to the Mozambique coast north of the Limpopo. A key is provided for the four currently recognised species ofHomopholisand a neotype from KwaZulu-Natal is designated forH. wahlbergii, helping to stabilise the use of this name in light of the resurrection ofH. arnoldi. [ABSTRACT FROM PUBLISHER]

The status of the material of the genus Gonionotophis from north-eastern Africa (north of Latitude 12'S and east of Longitude 28'E) is reconsidered. The northernmost specimens of G. nyassae (Gunther, 1888) fall within the known range of variation for that species. The available specimens of the G. capensis (A. Smith, 1847) complex from this region indicate that the number of postoculars varies from none to three, so that the 'diagnostic' lack of postoculars in M. fiechteri Scortecci, 1929 is invalid. The Somali specimens should be assigned to the north-eastern form G. chanleri (Stejneger, 1893), of which Simocephalus unicolor Boulenger, 1910 is a synonym. Data for G. chanleri is summarised from throughout its extensive range, and compared with data for adjacent populations of G. capensis and G. savorgnani (Mocquard, 1877). [ABSTRACT FROM AUTHOR]

A new, medium-sized limbless Acontias lizard is described from Zambia. The new species is characterized by a concealed eye, four chin shields bordering the mental, 14 scale rows around midbody, and a unique coloration of a dark dorsum and a pale ventrum. The species is similar to its congener Acontias jappi, but distinct in aspects of pholidosis, and was assigned to the genus Acontias using external morphological as well as osteological characters. The specimen was collected on Kalahari sands at Kataba Forest Reserve in the western part of the country. [ABSTRACT FROM AUTHOR]

The article focuses on a study which examined the patterned phase of distribution of Dasypeltis atra in Tanzania. It was observed that four specimens of the species represent range extensions into savanna habitat. One of them came from the Ibaya Camp in Mkomazi Game Reserve which extends its range by about 100 kilometers to the south-east from Mount Kilimanjaro. It is suggested that the patterned coloured phase of the species is an adaptation that made the species more cryptic in savanna habitat.

The snake superfamily Elapoidea presents one of the most intransigent problems in systematics of the Caenophidia. Its monophyly is undisputed and several cohesive constituent lineages have been identified (including the diverse and clinically important family Elapidae), but its basal phylogenetic structure is obscure. We investigate phylogenetic relationships and spatial and temporal history of the Elapoidea using 94 caenophidian species and approximately 2300–4300 bases of DNA sequence from one nuclear and four mitochondrial genes. Phylogenetic reconstruction was conducted in a parametric framework using complex models of sequence evolution. We employed Bayesian relaxed clocks and Penalized Likelihood with rate smoothing to date the phylogeny, in conjunction with seven fossil calibration constraints. Elapoid biogeography was investigated using maximum likelihood and maximum parsimony methods. Resolution was poor for early relationships in the Elapoidea and in Elapidae and our results imply rapid basal diversification in both clades, in the late Eocene of Africa (Elapoidea) and the mid-Oligocene of the Oriental region (Elapidae). We identify the major elapoid and elapid lineages, present a phylogenetic classification system for the superfamily (excluding Elapidae), and combine our phylogenetic, temporal and biogeographic results to provide an account of elapoid evolution in light of current palaeontological data and palaeogeographic models. © The Willi Hennig Society 2009. [ABSTRACT FROM AUTHOR]

The article describes a Dagger-tooth Vine Snake, Xyelodontophis uluguruensis, found in Nguru Mountains, Tanzania. The body of the female snake is grey and heavily speckled with black forms. While in captivity, the snake laid several eggs, with only one male hatchling surviving. The male hatchling has a similar color pattern with the hatchling of Dispholidus typus.