| phylogeny of caecilian amphibians (gymnophiona) based on complete mitochondrial genomes and nuclear rag1. | we determined the complete nucleotide sequence of the mitochondrial (mt) genome of five individual caecilians (amphibia: gymnophiona) representing five of the six recognized families: rhinatrema bivittatum (rhinatrematidae), ichthyophis glutinosus (ichthyophiidae), uraeotyphlus cf. oxyurus (uraeotyphlidae), scolecomorphus vittatus (scolecomorphidae), and gegeneophis ramaswamii (caeciliidae). the organization and size of these newly determined mitogenomes are similar to those previously reported ... | 2004 | 15336675 |
| ultrastructural observations of previtellogenic ovarian follicles of the caecilians ichthyophis tricolor and gegeneophis ramaswamii. | the ultrastructural organization of the previtellogenic follicles of the caecilians ichthyophis tricolor and gegeneophis ramaswamii, of the western ghats of india, were observed. both species follow a similar seasonal reproductive pattern. the ovaries contain primordial follicles throughout the year with previtellogenic, vitellogenic, or postvitellogenic follicles, depending upon the reproductive status. the just-recruited primordial follicle includes an oocyte surrounded by a single layer of fo ... | 2007 | 17345639 |
| assembly of ovarian follicles in the caecilians ichthyophis tricolor and gegeneophis ramaswamii: light and transmission electron microscopic study. | though much is known about various aspects of reproductive biology of amphibia, there is little information on the cellular and mechanistic basis of assembly of ovarian follicles in this group. this is especially true of the caecilians. therefore, taking advantage of the abundant distribution of caecilians in the western ghats of india, two species of caecilians, ichthyophis tricolor and gegeneophis ramaswamii, were subjected to light and transmission electron microscopic analysis to trace the s ... | 2007 | 17637101 |
| stages in follicle cell/oocyte interface during vitellogenesis in caecilians ichthyophis tricolor and gegeneophis ramaswamii: a transmission electron-microscopic study. | we describe the ultrastructural organization of the vitellogenic follicle stages in two caecilian species. monthly samples of slices of ovary of ichthyophis tricolor and gegeneophis ramaswamii from the western ghats of india were subjected to transmission electron-microscopic analysis, with special attention to the follicle cell/oocyte interface. in order to maintain uniformity of the stages among the amphibians, all the stages in the caecilian follicles were assigned to stages i-vi, the vitello ... | 2008 | 18030494 |
| accumulation of yolk in a caecilian (gegeneophis ramaswamii) oocyte: a light and transmission electron microscopic study. | there is a paucity of information on the female reproductive biology of the caecilian amphibians when compared with the other vertebrate groups. hence, the accumulation of nutrient reserves in the form of yolk and formation of yolk platelets were studied in gegeneophis ramaswamii, adopting light microscopic histological and transmission electron microscopy analysis. previtellogenic as well as vitellogenic follicles were observed in appropriate preparations. on the basis of the source and the rou ... | 2008 | 18777571 |
| molecular systematics of caeciliid caecilians (amphibia: gymnophiona) of the western ghats, india. | together, indian plus seychelles caeciliid caecilian amphibians (gymnophiona) constitute approximately 10% of the extant species of this order. a molecular phylogenetic analysis of all but one (or two) nominal species (16, in five genera) is presented based on mitochondrial (12s, 16s, cytb, cox1) and nuclear (rag1) sequence data. results strongly support monophyly of both seychelles and peninsular indian caeciliids, and their sister-group status. within the indian caeciliids, indotyphlus and geg ... | 2011 | 21406239 |
| ontogeny of the skull, lower jaw, and hyobranchial skeleton of hypogeophis rostratus (amphibia: gymnophiona: caeciliidae) revisited. | few detailed descriptions of the development of the head skeleton in caecilian amphibians are available. one of those is the work of marcus and students (e.g., gehwolf [1923] z anat entwick 68:433-454; marcus [1933] anat anz 80:142-146; marcus et al. [1935] gegenbaurs morphol jb 76:375-420) on the morphology and development of the skull, lower jaw, and hyobranchial skeleton in the seychellean caeciliids hypogeophis rostratus and grandisonia alternans. these workers described a high number of ind ... | 2006 | 16700055 |
| the morphology of prehatching embryos of caecilia orientalis (amphibia: gymnophiona: caeciliidae). | the state of development of advanced embryos of the direct-developing ecuadorian caecilian caecilia orientalis (caeciliidae: gymnophiona: amphibia) was examined. because it is established that development is correlated with reproductive modes in a number of features, we included comparison with taxa that represent the major reproductive modes and all of the modern normal tables and ossification sequences. the embryos of c. orientalis most closely resemble those of stage 47/48 gegeneophis ramaswa ... | 2009 | 19572309 |
| externally measured condition versus internal organ mass in the caecilian gegeneophis ramaswamii (amphibia: gymnophiona: caeciliidae). | the relationship between externally measured condition (mass x length(-3)) and the mass of internal major organs in the caecilian gegeneophis ramaswamii is investigated, based on a collection of 67 specimens from three southern indian localities in the early and mid-monsoon. condition in juveniles (< 90 mm total length) is higher than in subadults (90-170 mm) and adults (> 170 mm). the relationship between condition and total length is consistent in subadults, but variable in adults, and these d ... | 2005 | 15846053 |
| a subterranean generalist predator: diet of the soil-dwelling caecilian gegeneophis ramaswamii (amphibia; gymnophiona; caeciliidae) in southern india. | 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 localities in kerala, southern india, in early and mid-monsoon. although termites were the most frequently inge ... | 2004 | 15015756 |
| phylogenetic relationships of indian caecilians (amphibia: gymnophiona) inferred from mitochondrial rrna gene sequences. | 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 caecilian families found in india and aligned against previously reported sequences for 13 caecilian speci ... | 2002 | 12099794 |
| light and transmission electron microscopic structure of skin glands and dermal scales of a caecilian amphibian gegeneophis ramaswamii, with a note on antimicrobial property of skin gland secretion. | amphibian skin secretions contain a variety of bioactive compounds that are involved in diverse roles such as communication, homeostasis, defence against predators, pathogens, and so on. especially, the caecilian amphibians possess numerous cutaneous glands that produce the secretory material, which facilitate survival in their harsh subterranean environment. inspite of the fact that india has a fairly abundant distribution of caecilian amphibians, there has hardly been any study on their skin a ... | 2019 | 31002452 |