01845nas a2200193   4500008004100000020001400041245015500055210006900210260000800279300001200287490000700299520121300306100001401519700002301533700001701556700001601573700001601589856004601605       1995                        eng d  a0028-259600aULTRASTRUCTURE OF THE STOMA IN CEPHALOBIDAE, PANAGROLAIMIDAE AND RHABDITIDAE, WITH A PROPOSAL FOR A REVISED STOMA TERMINOLOGY IN RHABDITIDA (NEMATODA)0 aULTRASTRUCTURE OF THE STOMA IN CEPHALOBIDAE PANAGROLAIMIDAE AND   cMar  a153-1820 v413 aAvailable information on the terminology and ultrastructure of the stoma in Rhabditida is reviewed, with new data on the cephalobids Seleborca complexa, Triligulla aluta and Zeldia punctata, as well as the panagrolaimid Panagrolaimus sulerbus. It is shown that the stoma of most examined species can be divided into six regions rather than five, on the basis of the cuticular differentiations and especially the surrounding structures and tissues. Probable stomatal homologies between different families are used as a basis for a revised buccal terminology, in which the following three main regions are distinguished: 1) cheilostom, surrounded by labial cuticle; 2) gymnostom, surrounded by arcade epidermis; 3) stegostom, surrounded by cells that lie enclosed within the peripharyngeal basal lamina layer. The stegostom can be divided further into (usually) four more regions, respectively called pro-, meso-, meta- and telostegostom, defined by the presence of three interradial or six adradial cell. Continued use of the term ''rhabdion'' as well as the traditional Five-part buccal terminology is strongly discouraged, because they prove to be based on incorrect and incompatible anatomical assumptions.1 aDeLey, P.1 aVandeVelde, M., C.1 aMounport, D.1 aBaujard, P.1 aCoomans, A.  uhttps://nematodes.myspecies.info/node/27102485nas 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/28001366nas a2200181   4500008004100000020001400041245015500055210006900210260001200279300001200291490000700303520076400310100001201074700001601086700002001102700001601122856004601138       1998                        eng d  a1164-557100aThe Xiphinema americanum group (Nematoda : Longidoridae). 2. Observations on Xiphinema brevicollum Lordello & da Costa, 1961 and comments on the group0 aXiphinema americanum group Nematoda Longidoridae 2 Observations   cSep-Oct  a475-4900 v213 aThis article begins with a critical review of the article of Lamberti et al. (1992) with descriptions of X. brevicollum, X. diffusum, and three new species (X. parvum, X. pseudoguirani, X. taylori), all closely related to each other. After studying type specimens of these five species and paratypes of X. incognitum and X. sheri, the present authors propose X. diffusum, X. incognitum, X, parvum, X. pseudoguirani, X. sheri, and X, taylori as junior synonyms of X. brevicollum. The second part of the article includes a detailed characterization of the Xiphinema americanum-group and a list of its species. X. pachydermum, X. brevisicum, X. longistilum, X. mesostilum, and X, microstilum are excluded from the X. americanum-group. (C) Orstom/Elsevier, Paris.1 aLuc, M.1 aCoomans, A.1 aLoof, P., A. A.1 aBaujard, P.  uhttps://nematodes.myspecies.info/node/22700840nas a2200157   4500008004100000020001400041245012200055210006900177260001200246300001000258490000700268520032700275100001800602700001600620856004600636       1998                        eng d  a1164-557100aA polytomous key for the identification of species of the family Trichodoridae Thorne, 1935 (Nematoda : Triplonchida)0 apolytomous key for the identification of species of the family T  cJan-Feb  a37-620 v213 aThe species of the family Trichodoridae are listed with their current taxonomical status. A polytomous key to males and females of the 90 species of the family is presented. To avoid misidentification at genus level, the species of the four genera of the family are treated as a single group in the present polytomous key.1 aDecraemer, W.1 aBaujard, P.  uhttps://nematodes.myspecies.info/node/23100822nas a2200157   4500008004100000020001400041245014500055210006900200260001200269300001000281490000700291520028600298100001800584700001600602856004600618       1998                        eng d  a1164-557100aTaxonomic status of Paratrichodorus faisalabadensis Nasira and Maqbool, 1994 and P-psidii Nasira and Maqbool, 1994 (Nematoda : Triplonchida)0 aTaxonomic status of Paratrichodorus faisalabadensis Nasira and M  cJan-Feb  a33-360 v213 aThe Pakistan species P. faisalabadensis and P. psidii described by Nasira and Maqbool (1994) are synonymized with P. mirzai (Siddiqi, 1960) Siddiqi, 1974 based on a detailed study of type specimens. The presence of a second pair of post-cloacal papillae in P. mirzai is questioned.1 aDecraemer, W.1 aBaujard, P.  uhttps://nematodes.myspecies.info/node/23201143nas a2200169   4500008004100000020001400041245011000055210006900165300001200234490000600246520061100252100002000863700001600883700001600899700001200915856004600927       2001                        eng d  a1388-554500aOn five species of the genus Xiphinema Cobb, 1913 (Nematoda : Longidoridae) recently described from India0 afive species of the genus Xiphinema Cobb 1913 Nematoda Longidori  a277-2830 v33 aExamination of paratypes of five species of Xiphinema from India described by Singh and Khan (1998) led to the following conclusions: X. larliani Khan & Singh, 1998 appears a valid species close to X. simillimum Loof & Yassin, 1971. The other four species are considered junior synonyms, X. digicaudatum of X. brasiliense Lordello, 1951; X. gracilicaudatum of X. radicicola Goodey, 1936; X. arunachalense of X. brevicollum Lordello & Da Costa, 1961; X. pruni of X. basiri Siddiqi, 1959. Complementary morphological data, measurements and illustrations based on the paratypes are given for the five species.1 aLoof, P., A. A.1 aCoomans, A.1 aBaujard, P.1 aLuc, M.  uhttps://nematodes.myspecies.info/node/20301665nas a2200205   4500008004100000020001400041245008800055210006900143260000800212300001000220490000700230520106700237100001701304700001601321700001501337700002501352700001601377700002001393856004601413       2000                        eng d  a0022-300X00aUltrastructural variation of cuticular layers in Cephalobinae (Nemata : Rhabditida)0 aUltrastructural variation of cuticular layers in Cephalobinae Ne  cMar  a13-190 v323 aThe ultrastructure of the body wall cuticle in Acrobeles complexus, Cervidellus alutus, and Zeldia punctata was studied as a step toward understanding biological diversity within Cephalobinae, and to discover new characters for phylogeny-based classification of the suborder. In each species the cuticle consists of cortical, median, and basal layers. The cortical layer includes an external trilaminate and internal granular zone; the basal layer is striated. In Z. punctata the median layer is electron-lucent, vacuolar, and penetrates the cortical layer; it also includes periodically dense columns that apparently correspond to punctuations visible with light microscopy. In contrast, the median layer of the body wail cuticle in A. complexus and C. alutus is bisected by a zone that undulates parallel to the nematode surface and with periodicity corresponding to annuli. Phylogenetic analysis, using derived cuticle patterns of Cephalobinae, requires an understanding of ecological pressures that could result in convergent evolution of cuticle characters.1 aMounport, D.1 aBaujard, P.1 aDe Ley, P.1 aVan de Velde, M., C.1 aCoomans, A.1 aBaldwin, J., G.  uhttps://nematodes.myspecies.info/node/21301605nas a2200157   4500008004100000020001400041245014500055210006900200300001200269490000600281520106300287100001701350700001601367700001801383856004601401       2003                        eng d  a1388-554500aEffect of biotic and abiotic factors on the morphometric variability of Paratrichodorus rhodesiensis (Nematoda : Trichodoridae) from Senegal0 aEffect of biotic and abiotic factors on the morphometric variabi  a463-4770 v53 aEffects of temperature, humidity, temperature and humidity interaction and host on morphometric variability of Paratrichodorus rhodesiensis were studied. Nematode cultures were established in a glasshouse under controlled environments. Amongst the factors investigated, host was found to be the most influential on both sexes (P < 0.05) affecting all characters in females and eiaht out of I I characters in males. Ratios b and c were found to be highly variable and hence their use is not suggested. On the contrary, ratio a was found to be a good indicator of nematode condition, particularly in association with hosts. Vulva position (V) was found to be the most stable character. Paratrichodorus rhodesiensis was affected by higher temperatures of 34 and 36degreesC. Change in humidity did not show a demonstrable trend on morphometric characters in both sexes. Interaction effect of temperature and humidity resulted in a significant effect on body length and body diameter in females and on ratio b and c, pharynx, onchiostyle and tail length in males.1 aWondirad, M.1 aBaujard, P.1 aDecraemer, W.  uhttps://nematodes.myspecies.info/node/181