Biologists have paid relatively little attention to subterranean predators, especially their ecology. Although diets of some subterranean lower vertebrates suggest specialisation, there remains a lack of quantitative data. The diet of the caecilian amphibian Gegeneophis ramaswamii was investigated through analyses of gut contents of 67 specimens collected in randomised surveys at three localiti...

Spemann’s organizer experiment in 1924 suggested that neural tissue is induced from prospective epidermal tissue by a secreted factor1. Since then, neural induction has been a focus of biological interest; however attempts to isolate a neural inducing factor remained unsuccessful for decades. Therefore, it came as a major relief when the molecular basis of neural induction in amphibia was unrav...

Hyneria lindae, gen. et sp. nov., is a large rhizodontid rhipidistian fish from the Upper Devonian (Oswayo Formation) of Pennsylvania. It shows a remarkable similarity to the intermediate stages that must have preceded the first true Amphibia. The similarity is due to the parallel evolution of rhizodontid Rhipidistia and the Amphibia from a common stock in the Middle or early Late Devonian. POS...

S OF REPORTS OF TUMORS IN AMPHIBIA

BACKGROUND AND AIMS Differential responses of closely related species to submergence can provide insight into the evolution and mechanisms of submergence tolerance. Several traits of two wetland species from habitats with contrasting flooding regimes, Rorippa amphibia and Rorippa sylvestris, as well as F(1) hybrid Rorippa × anceps were analysed to unravel mechanisms underlying submergence toler...

The sheaths that invest the nerves of amphibia, insects and freshwater clams differ in structure. Previous studies have shown, though, that the nerves of all these animals have in common the ability to function for extended periods in sodium-free solutions (Krnjevid, 1954; Twarog & Roeder, 1956; Carlson & Treherne, 1969). In amphibia and insects, it has been shown that this capacity is lost if ...

background: there has been increasing awareness throughout the world regarding the remarkable decrease in amphibian population. for such amphibian population decline several causes have been given. cadmium, a heavy metal is released both from natural sources (leaching of cadmium rich soils) and anthropogenic activities to the aquatic and terrestrial environments. this study evaluated the toxici...

India has a diverse caecilian fauna, including representatives of three of the six currently recognized families, the Caeciliidae, Ichthyophiidae, the endemic Uraeotyphlidae, but previous molecular phylogenetic studies of caecilians have not included sequences for any Indian caecilians. Partial 12S and 16S mitochondrial gene sequences were obtained for a single representative of each of the cae...

t f p A single vertebra from an Early Formative period archaeological ite in coastal Chiapas, México, is identified as belonging to the mphibian Dermophis mexicanus (Duméril and Bibron) 1841 Amphibia: Gymnophiona: Caeciliidae). The vertebra was recovered rom deposits dated to approximately 1200–1350 B.C. The specimen epresents the first Quaternary fossil record for gymnophiones. Its resence sug...

Comparisons ofrelative lengths oflampbrush loops, nascent RNP transcripts and hnRNA molecules from oocytes of amphibia with different C-values show that there is an increasing trend in loop, and transcriptional unit, length with increase in genome size but no increasing trend with respect to RN A contour length.The formation of duplex regions and circles in RNP fibrils indicates that RNA proces...