Results 171 to 180 of about 1,851 (215)
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Is the Turbellaria polyphyletic
Hydrobiologia, 1986Within the last two decades, syntheses of both light-microscopic and ultrastructural characters have shown that there are three well-defined monophyletic groups within the Platyhelminthes: 1) the Catenulidale, 2) the Nemertodermatida-Acoela, and 3) the Haplopharyngida-Macrostomida-Polycladida-Neoophora (+ parasitic platyhelminth classes).
Julian P. S. Smith +2 more
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Expression of a neuropeptide similar to allatotropin in free living turbellaria (platyhelminthes)
Tissue and Cell, 2011 Mechanisms coordinating cell-cell interaction have appeared early in evolution. Allatotropin (AT), a neuropeptide isolated based on its ability to stimulate the synthesis of juvenile hormones (JHs) in insects has also been found in other invertebrate ...
Jorge Rafael Ronderos +1 more
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Parazitologiia, 2001
The ultrastructure of the epithelium in Notentera ivanovi (Turbellaria, Fecampiida) has been studied. Notentera ivanovi lacks the digestive system but has a pad of the epidermal cells on the dorsal side of the body, which seems to be similar to the digestive epidermis on LM.
E E, Kornakova, A V, Marchenkov
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The ultrastructure of the epithelium in Notentera ivanovi (Turbellaria, Fecampiida) has been studied. Notentera ivanovi lacks the digestive system but has a pad of the epidermal cells on the dorsal side of the body, which seems to be similar to the digestive epidermis on LM.
E E, Kornakova, A V, Marchenkov
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Philosophical Transactions of the Royal Society of London, 1879
Abstract Two forms of considerable interest belonging to this group were found to be tolerably abundant. They belong to the genera Tetrastemma and Geoplana, I can scarcely entertain a doubt that these animals will finally prove to have a much wider geographical range, or, in other words, that it would be premature to regard them as ...
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Abstract Two forms of considerable interest belonging to this group were found to be tolerably abundant. They belong to the genera Tetrastemma and Geoplana, I can scarcely entertain a doubt that these animals will finally prove to have a much wider geographical range, or, in other words, that it would be premature to regard them as ...
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2023
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?? ?????????? ?????????????? ???? ?????????? ?????????????? 1977 ??. ???? ???????????????? ?????????????????????? ?? ???????? ???????????????? ?????????????????????????????? ?? ???????????????????????? ??. ??????????, ?? ?????????? ?? ?????????????????????? ?????????????? ??????????????. ?? ???????????? ???????????????????? ???????????????? ????????????
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Chemoreception in Turbellaria.
Experimental biology, 1989This paper reviews the ultrastructural features and the behavioural aspects of presumptive chemoreceptors as reported in the literature, and adds some new observations. The involvement of both uniciliary and multiciliary sensory receptors has been cited.
E A, Ferrero, C, Bedini
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2017
Entre los Platyhelminthes, los turbelarios son tradicionalmente reconocidos como la clase que agrupa a los representantes de vida libre del phylum. Sin embargo, no tienen sinapomorfías que los definan, siendo la presencia de una epidermis ciliada en el adulto la característica principal que los relaciona, carácter ausente en las formas parásitas del ...
Damborenea, María Cristina +2 more
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Entre los Platyhelminthes, los turbelarios son tradicionalmente reconocidos como la clase que agrupa a los representantes de vida libre del phylum. Sin embargo, no tienen sinapomorfías que los definan, siendo la presencia de una epidermis ciliada en el adulto la característica principal que los relaciona, carácter ausente en las formas parásitas del ...
Damborenea, María Cristina +2 more
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Parasitism and Commensalism in the Turbellaria
1971Publisher Summary Turbellaria are primarily free-living predators but each of their five orders contains families with representatives living in association with other animals. The commonest partners with which these associations are established include (1) echinoderms, (2) crustaceans, and (3) mollusks.
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Eggshell formation in polyclads (Turbellaria)
Hydrobiologia, 1986Eggshell formation in polyclads was studied by means of transmission electron microscopy and histochemistry. Shell-forming granules (SFG) in the egg, as well as secretions of shell glands (SGS), play roles in eggshell formation. As the oocytes pass through the portion of the female tract where the shell glands open, they are surronded by a two-layered ...
Sachiko Ishida, Wataru Teshirogi
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Revision of Koinocystididae (Turbellaria)
Zoologica Scripta, 1980The revision deals with the anatomy and systematics of the known 38 species of Koinocystididae. The taxonomy within the family is revised, a key for the identification of live specimens is given and an attempt is made to reconstruct the phylogeny of genera and species on the basis of anatomical transformation series. New genera are Axiutelga. Brunetia,
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