| the hatching rhythm of polystoma integerrimum, a monogenean from the frog rana temporaria. | 1. eggs of polystoma integerrimum incubated in alternating periods of light and darkness at a constant temperature hatch in the light. 2. eggs incubated and hatched in continuous light (10 degrees or 18 degrees c) hatch without a rhythm. eggs incubated and hatched in continuous darkness at 18 degrees c hatch without any circadian rhythm but fail to hatch at 10 degees c until 1 month later than expected. 3. at both 10 degrees and 18 degrees c the hatching rhythm persists in conditions of continuo ... | 1978 | 309814 |
| [evolution of the tegument of polystoma (monogenea polystomatidae) during the cycle. persistence of the nucleated embryonic epidermis in oncomiracidia (author's transl)]. | the evolution of tegument ultrastructures during development was studied in two polystome species, polystoma integerrimum and polystoma pelobatis. it differs from monogenea and other platyhelminths in the presence of nuclei in the tegumentary syncytium of the oncomiracidium and their deferred elimination which occurs in the post-larva attached to the gills of the tadpole. this represents a delay in the loss of embryonic characteristics in polystoma larvae which may be related to the possibility ... | 1979 | 494712 |
| [ultrastructure of the tegumnet of the slow-growing larva of polystoma integerrimun (frohlich 1798). evolutionary significance]. | the ultrastructure of the integument of the gill living post-larva of polystoma integerrimum (monogenea) from the common frog rana temporaria is investigated for the first time; it has been compared with those of the adult stage, of other juvenile stages of marine monogenea and of some digeneans adapted to frog urine. | 1975 | 816491 |
| [serotonin and dopamine in the tissue extracts of polystoma integerrimum (monogenea)]. | spectrofluorometric analysis has revealed substances with spectral characteristics identical to those of serotonin and dopamine in tissue extracts of polystoma integerrimum. a possible function of the substances is discussed. | 1988 | 3260368 |
| [polystoma integerrimum pelobatis n. subsp. (monogenea), parasite of pelobates cultripes (cuvier 1829)]. | | 1966 | 5950216 |
| ovoviviparity in platyhelminth life-cycles. | the encapsulated embryos of platyhelminths may be retained and complete their development in utero in a range of circumstances. however, hatching within the parent (the criterion of ovoviviparity) is relatively rare and larvae generally emerge only after deposition. viviparity is characterized by the nutritional dependency of the unencapsulated larva upon the parent, but in several cases larvae retained within a shell also receive parental nutrients during intra-uterine development. uptake of ex ... | 1983 | 6346232 |
| scanning electron microscopy of polystoma integerrimum (monogenea, polystomatidae). | the tegumental surfaces of both the bladder (normal) adult and branchial (neotenic) adult of the dimorphic monogenean polystoma integerrimum are elevated into ridges forming a honeycomb-like pattern of hexagons. in some regions, upright microvilli are located at the angles of the hexagons. the two hamuli of the adult forms are sheathed with the ornamented tegument except for the naked distal spine. larvae with haptors at the two-sucker stage of development have a tegument with the elevated honey ... | 1995 | 7601591 |
| phylogeny of the polystomatidae (platyhelminthes, monogenea), with particular reference to polystoma integerrimum. | polystome phylogeny is examined, with emphasis on the dimorphism of the frog parasite polystoma integerrimum, which exists in a fully differentiated and a neotenic form, and the evolutionary development of exclusively neotenic genera. protopolystoma, which infects the aquatic toad xenopus, has essentially the same morphology as the neotenic (branchial) adult of p. integerrimum and is interpreted as a neotenic genus; however, it inhabits the bladder of its host, the infection site of the normal a ... | 1995 | 7635619 |
| a technique for the detection of polystoma integerrimum in the common frog (rana temporaria). | | 1956 | 13346053 |
| anatomy of polystoma integerrimum. | | 1957 | 13483549 |
| the dimorphism of polystoma integerrimum (frolich) rudolphi and its bearing on relationships within the polystomatidae. i. | | 1960 | 13785451 |
| the dimorphism of polystoma integerrimum (frolich) rudolphi and its bearing on relationships within the polystomatidae. ii. | | 1960 | 13785452 |
| the dimorphism of polystoma integerrimum (frolich) rudolphi and its bearing on relationships within the polystomatidae. iii. | | 1961 | 13785453 |
| abnormal migration in polystoma integerrimum. | | 1959 | 13844882 |
| studies on digestion in the monogenetic trematode polystoma integerrimum. | | 1959 | 14407092 |
| natural epizootics of polystoma integerrimum in tadpoles. | | 1949 | 18142470 |
| a metazoan parasitological research of some iraqi amphibians. | the incidence and intensity of metazoan parasites in 3 species of iraqi amphibians were studied. the amphibians were rana ridibunda, bufo viridis and hyla arborea. twenty-four species of helminths were encountered, including 16 trematodes, 1 cestode and 7 nematodes. their respective names are: polystoma integerrimum, prosotocus confusus, p. fuelleborni, pleurogenoides gastroporus, p. medians, sonsinotrema tacapense, opisthioglyphe ranae, haplometra cylindracea, haematoloechus volgensis, h. vitel ... | 2007 | 18224630 |
| the helminth fauna study of european common brown frog (rana temporaria linnaeus, 1758) in the volga basin. | in this paper we considered information on the helminth fauna of the european common brown frog (rana temporaria linnaeus, 1758) from 10 regions of the volga basin. this study includes consolidated data of different authors over the last 30 years, supplemented by the results of our own research. there are reliably known finds of 29 species of helminths: monogenea - 1, trematoda - 21, nematoda - 7. trematodes gorgodera asiatica pigulevsky, 1945, paralepoderma cloacicola (luhe, 1909), mtc. and nem ... | 2014 | 25119361 |