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| Registros recuperados: 28 | |
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| Artois, T.J.; Schockaert, E.R.. |
| The taxonomy of the genus <i>Polycystis</i> Koelliker, 1845 <i>sensu</i> Schockaert & Karling, 1975 is discussed. Character analysis reveals the monophyletic state of the three species groups these authors defined within it. As no synapomorphies for the three groups can be found, the genus is split in three genera: <i>Polycystis</i> Koelliker, 1845, <i>Macrorhynchus</i> Graff, 1882 and <i>Paulodora Marcus</i>, 1948. The systematic position of <i>Macrorhynchus yaganus</i> (Marcus, 1954) Evdonin, 1977 is also discussed, resulting in the erection of the new genus <i>Marcusia</i> gen. n. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Phylogenetics; Taxonomy; Eukalyptorhynchia; Plathelminthes; Polycystididae; Polycystis. |
| Ano: 1998 |
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=6815 |
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| Karling, T.G.; Schockaert, E.R.. |
| <i>Paraustrorhynchus</i> gen. n., <i> P. pacificus</i> (California), <i>Antiboreorhynchus novzelae</i> sp. n. (New Zealand) and <i>Gyratrix proaviformis</i> sp. n. (Oregon) are described as new taxa. Additional notes are given on <i>Gyratrix hermaphroditus</i> Ehrbg. (new localities on the N. American Pacific coast), <i>Scanorhynchus forcipatus</i> Karling (new locality in California), <i>Paraustrorhynchus elixus</i> (Marcus) comb. n. and <i>Alcha evelinae</i> Marcus (new localities in California). The taxonomy of the genera and species is discussed. Viewpoints are presented on evolutionary trends and homologous atrial organs in the family Polycystididae. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Polycystididae. |
| Ano: 1977 |
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3563 |
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| Moens, J.B.; Martens, E.E.; Schockaert, E.R.. |
| A new species of <i>Umalgillid rhabdocoel</i> is described from echinoids from the Kenyan coast. <i>Syndesmis longicanalis</i> sp.nov. is found in the intestine of both <i>Tripneustes gratilla</i> and <i>Toxopneustes pileolus</i> collected near Mombasa. The most stricking characteristic, which distinguishes the new species from all known species of the <i>Syndesmis-Syndisyrinx</i> group is the very long scelotic bursal canal and the three ventral glandular papillae. A more detailed comparison between the specimens from the two different hosts demonstrates that they belong to the same species although some differences are statistically significant. |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 1994 |
URL: http://www.vliz.be/imisdocs/publications/217167.pdf |
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| Schockaert, E.R.; Bedini, C.. |
| The epithelium of the anterior tip of the bodywall, of the proboscis cavity and of the proboscis cone in <i>Polycystis naegelii</i> has been studied with the electron microscope. These epithelia are formed by six syncytial belts separated from each other by cellular limits: one belt belongs to the epidermis, three line the cavity and two cover the cone. The posterior belt of the cavity and those of the cone are of the insunk type bringing about a peculiar relationship between the latter two. Moreover, they are associated with muscular elements under the basal cone belt but above its basement membrane. Nine different kinds of glands have been observed erupting at the surface of the epithelia in the studied area, while six different sorts of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Skin; Ultrastructure; Polycystis naegelii. |
| Ano: 1978 |
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=6984 |
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| Martens, P.M.; Schockaert, E.R.. |
| Sand dwelling Turbellaria from the Delta of the Rivers Rhine, Meuse and Scheldt have been investigated. Thirty-eight samples taken from littoral and sublittoral stations in the Grevelingen, Eastern and Western Scheldt have been analysed. Thirty-three species were recorded (Acoela were not considered); twenty-four of them are new for the area and seven new species are described. Density and diversity of Turbellaria were higher in the Eastern Scheldt than in the Western Scheldt or in the Lake Grevelingen. A maximum density of 82 ind./100 cm³ was noted. A tentative calculation on relative abundance of the representatives of the different Turbellaria orders is established. Proseriata seem to be dominant in the localities studied. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Meiobenthos Taxonomy Turbellaria [Flatworms] ANE; Netherlands; Delta Area. |
| Ano: 1981 |
URL: http://www.vliz.be/imisdocs/publications/260405.pdf |
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| Schockaert, E.R.. |
| Possible evolutionary trends within Polycystididae have been indicated by Karling (1956) while studying the male genital organs of seyeral turbellarian groups. For the moment his ideas seem the most valuable basis for establishing an intrafamiliar system of Polycystididae, and have hence been applied formally (Schockaert, 1974). However, it can be demonstrated with several examples that the underlying principles prove to be unsatisfactory when one tries to apply Hennig's methodology:-the subfamily Duplacrorhynchinae Schockaert & Karling, 1970, can be recognized as containing the most plesimorph polycystidids; a synapomorph character that would give us an indication of the monophyly of this taxon is lacking;-the homology of some glandular elements (al!... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Evolution; Taxonomy; Polycystididae; Turbellaria [Flatworms]. |
| Ano: 1977 |
URL: http://www.vliz.be/imisdocs/publications/238823.pdf |
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| Martens, P.M.; Schockaert, E.R.. |
| Recent data and opinions on meiofaunal ecology are briefly reviewed; and from scattered data, the place of turbellarians in the meiobenthic community is discussed. Turbellarian diversity is of the same magnitude higher in sandy habitats than in muddy bottoms. In sand, turbellarian diversity is of the same magnitude as that of other important meiofaunal taxa, while densities range between 7-25% of the total meiofauna. Mean individual turbellarian dry weight seems to be four times that of nematodes and in sandy habitats turbellarian biomass may be equal to or exceed that of nematodes. Most turbellarian species may be considered as predators and in this respect may take the place occupied by macrofaunal species in muddy sediments. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ecology; Fauna; Literature reviews; Meiobenthos; Turbellaria [Flatworms]. |
| Ano: 1986 |
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3222 |
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| Registros recuperados: 28 | |
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