| temperature dependent changes in the thyroid gland of mertensiella caucasica (urodela, amphibia). | the influence of temperature on the thyroid gland of the caucasian salamander, mertensiella caucasica has been studied (1) with the light- and electron microscopes, (2) with enzyme histochemical and quantitative methods. animals which had been kept for years at 16 degrees c were exposed for 48 hrs to 4 degrees c or 27 degrees c. at 4 degrees c the follicular epithelium consisted of cuboidal cells with well-developed rough er, occasional distended cisternae of the rough endoplasmic reticulum (er) ... | 1976 | 177213 |
| pre-pleistocene refugia and differentiation between populations of the caucasian salamander (mertensiella caucasica). | a 350-bp fragment of the mitochondrial cytochrome-b gene was sequenced in the caucasian salamander, mertensiella caucasica, representing 10 populations from across its range along the black sea coast. five haplotypes were discovered among 65 fragments analyzed, differing at 2-50 positions. the highest differentiation between haplotypes was observed in animals from the eastern part of the species' range (borjomi) compared to those from the remainder of the species' range. randomly amplified nucle ... | 2000 | 10712846 |
| molecular phylogenetics and historical biogeography among salamandrids of the "true" salamander clade: rapid branching of numerous highly divergent lineages in mertensiella luschani associated with the rise of anatolia. | phylogenetic relationships among salamandrids of the "true" salamander clade are investigated using 2019 aligned base positions (713 parsimony informative) of 20 mitochondrial dna sequences from the genes encoding nd1 (subunit one of nadh dehydrogenase), trna(ile), trna(gln), trna(met), nd2, trna(trp), trna(ala), trna(asn), trna(cys), trna(tyr), and coi (subunit i of cytochrome c oxidase), plus the origin for light-strand replication (o(l)) between the trna(asn) and the trna(cys) genes. parsimon ... | 2001 | 11277635 |
| some water chemistry parameters of breeding habitats of the caucasian salamander, mertensiella caucasica in the western lesser caucasus. | selection of breeding habitat plays a fundamental role in the reproductive success of urodeles and anurans. we studied the influence of water chemistry variables on the selection of a specific water resource as breeding habitat in mertensiella caucasica. to determine the influence of water chemistry parameters on their habitat selection, we surveyed a total of 45 small river, streams and brooks in the western lesser caucasus (northeastern turkey and southwestern georgia). the water samples taken ... | 2009 | 19393978 |
| histological, immuno- and enzyme-histochemical investigations on the adenohypophysis of the urodeles, mertensiella caucasica and triturus cristatus and the caecilian, chthonerpeton indistinctum. | the pituitary glands of two urodelan species (mertensiella caucasica, triturus cristatus) and one one caecilian species (chthonerpeton indistinctum) were examined with histological (alcian blue, brookes' trichrome stain), enzyme histochemical (acid phosphatase, alpha-naphthylacetate-esterase, acetylcholinesterase) and immunofluorescence techniques (anti-carp gth, anti-ovine prolactin, anti-synthetic alpha-msh). in the pituitary gland of mertensiella and triturus six chromophilic cell types could ... | 1977 | 340044 |
| [euzetrema caucasica sp. n. (monogenea, polyopisthocotylidea), a parasite of the caucasian salamander]. | a new species of monogeneans, euzetrema caucasica sp. n., from the urinary bladder of mertensiella caucasica (waga, 1876) is described. the new species differs from e. knoepffleri combes, 1965 by greater sizes of the disc, median and marginal hooks and anterior suckers. certain suggestions are made on the biology and life cycle of euzetrema. | 2007 | 492771 |
| development of the bony skeleton in two salamander species (mertensiella caucasica and chioglossa lusitanica: salamandridae) with partial embryonization. | | 2017 | 21728129 |
| sexual dimorphism and age of mediterranean salamanders. | we analysed sexual size dimorphism (ssd) for two mediterranean species of the "true" salamander clade possessing distinct life histories (salamandra algira and mertensiella caucasica) and equilibrated the morphometric approach to individual age by using skeletochronology. for species that have a short breeding season and live at high altitudes, such as mediterranean amphibians, the fecundity advantage hypothesis predicts female-biased ssd to maximise reproductive success. our results showed no s ... | 2015 | 25497699 |
| fine structural and enzyme histochemical observations on the dorsal tail tubercle of mertensiella caucasica (urodela, amphibia). | | 1974 | 4455373 |
| the dorsal tail tubercle of mertensiella caucasica and m. luschani (amphibia: salamandridae). | males of the two species of mertensiella (m. caucasica and m. luschani) possess a tubercle projecting from the skin of the dorsal tail base, the single morphological character that defines the genus. the dorsal tail tubercle functions during courtship, and its role is similar in both species. the tubercle is inserted into the cloaca of the female during ventral amplexus, shortly before the male deposits a spermatophore. histological examination, however, revealed that the dorsal tubercles differ ... | 1997 | 29852686 |