00779nas a2200157   4500008004100000020001400041245009700055210006900152260000800221300001200229490000700241520029100248100001800539700001800557856004600575       1994                        eng d  a0028-259600aPOLKEPSILONEMA-FIRMATUM SP-N, A MARINE NEMATODE (NEMATA, EPSILONEMATIDAE) FROM NEW-CALEDONIA0 aPOLKEPSILONEMAFIRMATUM SPN A MARINE NEMATODE NEMATA EPSILONEMATI  cOct  a485-4930 v403 aPolkepsilonema firmatum sp. n., a second species of the so far monotypic genus, is described with a single field of small copulatory thorns and three stout ambulatory setae in the external rows in the male, and five supporting setae in the female; the diagnosis of the genus is emended.1 aGourbault, N.1 aDecraemer, W.  uhttps://nematodes.myspecies.info/node/28902485nas a2200193   4500008004100000020001400041245009700055210006900152260000800221300001200229490000700241520191100248100002302159700001402182700001702196700001602213700001602229856004602245       1994                        eng d  a0028-259600aULTRASTRUCTURE OF THE BUCCAL CAVITY AND THE CUTICLE OF 3 CEPHALOBIDAE (NEMATODA, RHABDITIDA)0 aULTRASTRUCTURE OF THE BUCCAL CAVITY AND THE CUTICLE OF 3 CEPHALO  cOct  a541-5630 v403 aThe ultrastructure of the buccal cavity was elucidated in three species of cephalobids, two belonging to the genus Acrobeloides and one to the genus Chiloplacus. The cuticular differentiations, as well as the identity of the surrounding structures or tissues are used to identify the consecutive buccal regions. Six distinct buccal regions are discernible rather than the five parts generally assumed to be characteristic for many nematodes. The first buccal region is surrounded by the lip cuticle in which three sclerotized plates (two in a dorsosublateral position and one in a medioventral position) are embedded. The second buccal region is surrounded by two consecutive rings of arcade epidermis. The posterior arcade epidermis contains an electron-dense ring that surrounds the buccal cuticle and partly penetrates the junction of the cuticle and the anterior set of pharyngeal muscles. The basal lamina layer separating pharyngeal musculature from the other tissue components in the labial region ends as it contacts the electron-dense ring. The fourth to the sixth buccal regions are surrounded by four consecutive sets of pharyngeal muscles. The two anterior sets (m1 and m2) are composed of one muscle per pharyngeal sector, while the two posterior sets (m3 and m4) contain two cells per sector, interradially separated by cell membranes. Marginal cells, containing electron-dense radial fibres, are situated in a perradial position, thus separating the muscle cells. The anteriormost set of marginal cells spans the length of the four anterior muscle sets. The dorsal gland opens into the buccal lumen by means of a narrow canal situated at the anterior margin of the dorsal m4 muscle set. A neuronal cell process is situated just anterior to the canal. It is proposed that the observed buccal organisation does not fit the current concepts related to the homology of buccal parts in nematodes.1 aVandeVelde, M., C.1 aDeLey, P.1 aMounport, D.1 aBaujard, P.1 aCoomans, A.  uhttps://nematodes.myspecies.info/node/28001390nas a2200157   4500008004100000020001400041245007500055210006900130260000800199300001200207490000700219520092300226100002101149700001601170856004601186       1994                        eng d  a0028-259600aREVISION OF THE GENUS TYLENCHOLAIMUS DEMAN, 1876 PRODELPHIC SPECIES .30 aREVISION OF THE GENUS TYLENCHOLAIMUS DEMAN 1876 PRODELPHIC SPECI  cJul  a348-3680 v403 aThis paper is a study of a species group belonging to the genus Tylencholaimus de Man, 1876 and with an intrincate taxonomy. The group is distinguished by the combination of the following characters: prodelphic genital system, posterior branch absent or clearly reduced (in general less than the corresponding body width long), perioral area not disc-like and low (less-than-or-equal-to 3.5 mum), anterior part of the pharynx well muscularized and expanding gradually into the basal bulb, odontostyle relatively short (less-than-or-equal-to 6 mum), and tail relatively short (less-than-or-equal-to 16 mum) and rounded conoid to hemispherical. Six species constitute this group: T. australis Yeates, 1979, T. chathami Yeates, 1979, T. ibericus sp. n., T. maritus Loof & Jairajpuri, 1968, T. micronanus Yeates, 1979 and T. nanus Thorne, 1939. Descriptions, illustrations and measurements are given for all these species.1 aSantiago, R., P.1 aCoomans, A.  uhttps://nematodes.myspecies.info/node/28100973nas a2200157   4500008004100000020001400041245007500055210006900130260000800199300001200207490000700219520050600226100002100732700001600753856004600769       1994                        eng d  a0028-259600aREVISION OF THE GENUS TYLENCHOLAIMUS DEMAN, 1876 PRODELPHIC SPECIES .10 aREVISION OF THE GENUS TYLENCHOLAIMUS DEMAN 1876 PRODELPHIC SPECI  cApr  a157-1850 v403 aThis paper deals with the taxonomy of a species group belonging to the genus Tylencholaimus de Man, 1876 and characterized by having a prodelphic female genital system and a disc-like perioral region. Seven species form the group: T. conicaudatus sp. n., T. constrictus Vinciguerra, 1986, T. longicaudatus sp. n., T. leptodorus Monteiro, 1970, T minimus de Man, 1876, T. minutus Vinciguerra, 1986 and T. pusillus Loof & Jairajpuri, 1968. Descriptions and measurements are given for all of the species.1 aSantiago, R., P.1 aCoomans, A.  uhttps://nematodes.myspecies.info/node/28201117nas a2200157   4500008004100000020001400041245007500055210006900130260000800199300001200207490000700219520065000226100002100876700001600897856004600913       1994                        eng d  a0028-259600aREVISION OF THE GENUS TYLENCHOLAIMUS DEMAN, 1876 PRODELPHIC SPECIES .20 aREVISION OF THE GENUS TYLENCHOLAIMUS DEMAN 1876 PRODELPHIC SPECI  cApr  a186-2130 v403 aSeveral species belonging to the genus Tylencholaimus de Man, 1876 and characterized by a prodelphic genital system, absence of perioral disc and anterior part of the pharynx weakly muscular and expanding abruptly into the basal bulb are studied in the present paper. The group contains eight species: T. airolensis Loof & jairajpuri, 1968, T. decens Andrassy, 1991, T. formosus Loof & Jairajpuri, 1968, T. leptonchoides Loof, 1964, T mirabilis (Butschli, 1873) de Man, 1876, T. porosus Vinciguerra & Zullini, 1980, T. rumjhumi Khan & Laha, 1982 and T. vigil Andrassy, 1959. Description, illustrations and measurements are given for all species.1 aSantiago, R., P.1 aCoomans, A.  uhttps://nematodes.myspecies.info/node/28301002nas a2200157   4500008004100000020001400041245007300055210006900128260000800197300001000205490000700215520053900222100002100761700001600782856004600798       1994                        eng d  a0028-259600aREVISION OF THE GENUS TYLENCHOLAIMUS DEMAN, 1876 - DIDELPHIC SPECIES0 aREVISION OF THE GENUS TYLENCHOLAIMUS DEMAN 1876 DIDELPHIC SPECIE  cJan  a32-680 v403 aA study of the didelphic species hitherto included in the genus Tylencholaimus de Man, 1876 is presented in this paper; these are: T. congestus Loof & Jairajpuri, 1968, T crassus Loof &Jairajpuri, 1968, T. innebus Ahmad & jairajpuri, 1980, T. mongolicus Andrassy, 1967, T. paracrassus Monteiro, 1970, T paradoxus Loof &Jairajpuri, 1968, T. savaryi Loof &Jairajpuri, 1968, T. suryawanshii Ali & Chisty, 1972, T. tahatikus (Yeates, 1967) Siddiqi, 1968, and T teres Thorne, 1939. Descriptions and measurements of these species are given.1 aSantiago, R., P.1 aCoomans, A.  uhttps://nematodes.myspecies.info/node/28400940nas a2200169   4500008004100000020001400041245008800055210006900143260000800212300001000220490000700230520044500237100001400682700001600696700001200712856004600724       1994                        eng d  a0028-259600aMORPHOMETRICS OF JUVENILE STAGES OF SOME XIPHINEMA SPECIES (NEMATODA, LONGIDORIDAE)0 aMORPHOMETRICS OF JUVENILE STAGES OF SOME XIPHINEMA SPECIES NEMAT  cJan  a25-310 v403 aInformation is supplied on the juvenile stages of Xiphinema bergeri Luc, 1973, X. filicaudatum Loof & Maas, 197 2, X. longicaudatum Luc, 1961, X. parasetariae Luc, 1958, X. spaulli Heyns & Vermeulen, 1982 and X. vitis Heyns, 1974. Measurements including length of odontostyle and replacement odontostyle are tabulated, and illustrations are given of the tail shapes of the four juvenile stages, plus that of the adult female for comparison.1 aHeyns, J.1 aCoomans, A.1 aLuc, M.  uhttps://nematodes.myspecies.info/node/28601048nas a2200157   4500008004100000020001400041245011400055210006900169260000800238300001000246490000700256520055100263100001400814700001600828856004600844       1994                        eng d  a0028-259600a4 SPECIES OF THE XIPHINEMA-AMERICANUM GROUP (NEMATODA, LONGIDORIDAE) FROM ISLANDS IN THE WESTERN INDIAN-OCEAN0 a4 SPECIES OF THE XIPHINEMAAMERICANUM GROUP NEMATODA LONGIDORIDAE  cJan  a12-240 v403 aDuring a survey of nematodes on islands in the Western Indian Ocean, four different 'species' of the Xiphinema americanum group were found. Two of these are tentatively identified as Xiphinema diffusum Lamberti & Bleve-Zacheo, 19 79 and Xiphinema pseudoguirani Lamberti, Ciancio, Agostinelli & Coiro, 1992, while the other two do not fit the descriptions of any of the nominal species. One of these is described herein as Xiphinema franci sp. n., while the other is left unnamed. All four forms are illustrated, and their morphometrics tabulated.1 aHeyns, J.1 aCoomans, A.  uhttps://nematodes.myspecies.info/node/287