| a study of the neural control of sexual clasping behaviour in rana angolensis bocage and bufo regularis reuss with a consideration of self-regulatory hindbrain systems in the anura. | | 1967 | 6016360 |
| effect of delta-aminolaevulinic acid on the resting membrane potential of frog sartorius muscle. | the porphyrin precursor delta-aminolaevulinic acid can significantly decrease the resting membrane potential in a single fibre from the sartorius muscle of the frog rana angolensis. this effect is dose-dependent and reversible. | 1975 | 1188540 |
| micro-electrode studies on the effects of exogenous cyclic adenosine monophosphate on active sodium transport in frog skin. | 1. the electrical parameters of the sodium-transporting cells in frog skin of rana angolensis were determined under control conditions by using the micro-electrode technique. the data were analysed in terms of an electrical model (helman, 1979). 2. the control intracellular voltages averaged -84.7 mv while the electromotive force of the inner barrier, e'1, averaged 103.9 mv. the major portion (82%) of the transcellular resistance was situated at the outer, apical, barrier. 3. exogenous cyclic am ... | 1987 | 2821244 |
| amietia angolensis and a. fuscigula (anura: pyxicephalidae) in southern africa: a cold case reheated. | a study combining dna sequences of the mitochondrial 16s rrna gene, advertisement calls and morphology of some southern african river frogs confirms amietia vandijki (visser & channing, 1997) as a good species. the form presently referred to as amietia angolensis in southern africa is shown to comprise two species: amietia angolensis (bocage, 1866) known from angola, and amietia quecketti (boulenger, 1895) known from south africa, zimbabwe and lesotho. junior synonyms of a. quecketti include ran ... | 2013 | 26000433 |
| comparative landscape genetics of two river frog species occurring at different elevations on mount kilimanjaro. | estimating population connectivity and species' abilities to disperse across the landscape is crucial for understanding the long-term persistence of species in changing environments. surprisingly, few landscape genetic studies focused on tropical regions despite the alarming extinction rates within these ecosystems. here, we compared the influence of landscape features on the distribution of genetic variation of an afromontane frog, amietia wittei, with that of its more broadly distributed lowla ... | 2014 | 25230017 |
| species boundaries and taxonomy of the african river frogs (amphibia: pyxicephalidae: amietia). | a molecular phylogeny of the afrotropical anuran genus amietia based on 323 16s sequences indicates that there are 19 species, including four not yet described. no genetic material was available for the nominal a. inyangae. we consider them to represent full species, and define them based on 16s genetic distances, as well as differences in morphology, tadpoles and advertisement call where known. an analysis based on two mitochondrial and two nuclear genes (12s, 16s, 28s and tyrosinase exon 1), f ... | 2016 | 27615865 |