@article {86, title = {Distribution of proliferating cells and vasa-positive cells in the embryo of Macrostomum lignano (Rhabditophora, Platyhelminthes)}, journal = {Belgian Journal of ZoologyBelgian Journal of Zoology}, volume = {140}, year = {2010}, note = {Willems, Maxime Couvreur, Marjolein Boone, Mieke Houthoofd, Wouter Artois, Tom11th International Symposium on Flatworm BiologyJul 26-31, 2009Diepenbeek, BELGIUMS}, month = {Jul}, pages = {149-153}, abstract = {The neoblast stem cell system of flatworms is considered to be unique within the animal kingdom. How this stem cell system arises during embryonic development is intriguing. Therefore we performed bromodeoxyuridine labelling on late stage embryos of Macrostomum lignano to assess when the pattern of proliferating cells within the embryo is comparable to that of hatchlings. This pattern can be found in late embryonic stages ( stage 8). We also used the freeze cracking method to perform macvasa embryonic labelling. Macvasa is a somatic and germ line stem cell marker. We showed macvasa protein distribution during the whole embryonic development. In the macvasa-positive blastomeres the protein is localized around the nucleus in the putative chromatoid bodies. However, at a specific embryonic stage, it is also ubiquitously present in the cytoplasm of some blastomeres. We compare our data with what is known from Schmidtea polychroa of the expression of the vasa-like gene SpolvlgA and the protein distribution of the chromatoid body component Spoltud-1. The embryonic origin of the somatic stem cell system and the germ line is discussed.}, isbn = {0777-6276}, author = {Willems, M. and Couvreur, M. and Boone, M. and Houthoofd, W. and Artois, T.} } @article {87, title = {Burrowing nematodes from Colombia and their relationship with Radopholus similis populations, R. arabocoffeae and R. duriophilus}, journal = {NematologyNematology}, volume = {12}, year = {2010}, note = {Uribe, Gladis Emilia Munera Bert, Wim Vierstraete, Andy R. de la Pena, Eduardo Moens, Maurice Decraemer, WilfridaPart 4}, pages = {619-629}, abstract = {Two burrowing nematode populations from Colombia were characterised using morphological, morphometric and molecular criteria. The morphological and morphometric characters of the two populations did not differ from those of Radopholus similis. The phylogenetic analysis based on sequence comparison of 18S, D2D3 regions of these populations with those of Radopholus sp., R. similis and other Tylenchomorpha from GenBank confirmed the close molecular relationship between the genus Radopholus and the Hoplolaimidae. The consensus tree based on the comparison of ITS1-5.8-ITS2 rDNA sequences of the Colombian populations with R. similis (many sources), R. arabocoffeae and R. duriophilus from GenBank grouped the Colombian populations in a clade which also included R. similis from different localities. Other R. similis populations grouped in separated clades, which were closely related to the clade containing R. arabocoffeae and R. duriophilus. The high genetic variability among the R. similis populations was observed and confirmed by the high ITS1-5.8-ITS2 sequence divergence within the R. similis populations studied (5.4\%) which was comparable to the divergence (4.2-6.9\%) between the Radopholus species included in the analysis. These findings and the unresolved phylogenetic placement of R. arabocoffeae and R. duriophilus among R. similis suggests that the burrowing nematode could be a species complex. Limited information on the variability of the 18S and D2D3 region gives an indication of their possible value, besides ITS1-5.8-ITS, as molecular markers within Radopholus. No complete and comprehensible relation was found between the phylogenetic position of the Radopholus populations and their geographical origin or host.}, isbn = {1388-5545}, author = {Uribe, G. E. M. and Bert, W. and Vierstraete, A. R. and de la Pena, E. and Moens, M. and Decraemer, W.} } @article {88, title = {Nematode succession during composting and the potential of the nematode community as an indicator of compost maturity}, journal = {PedobiologiaPedobiologia}, volume = {53}, number = {3}, year = {2010}, note = {Steel, Hanne de la Pena, Eduardo Fonderie, Pamela Willekens, Koen Borgonie, Gaetan Bert, Wim}, pages = {181-190}, abstract = {One of the key issues in compost research is to assess when the compost has reached a mature stage. The maturity status of the compost determines the quality of the final soil amendment product. The nematode community occurring in a Controlled Microbial Composting (CMC) process was analyzed with the objective of assessing whether the species composition could be used as a bio-indicator of the compost maturity status. The results obtained here describe the major shifts in species composition that occur during the composting process. Compared to terrestrial ecosystems, nematode succession in compost differs mainly in the absence of K-strategists and numerical importance of diplogastrids. At the beginning of the composting process (thermophilic phase), immediately after the heat peak, the nematode population is primarily built by bacterial feeding enrichment opportunists (cp-1) (Rhabditidae, Panagrolaimidae, Diplogastridae) followed by the bacterial-feeding general opportunists (cp-2) (Cephalobidae) and the fungal-feeding general opportunists (Aphelenchoididae). Thereafter, during the cooling and maturation stage, the bacterial-feeding-predator opportunistic nematodes (Mononchoides sp.) became dominant. Finally, at the most mature stage, the fungal-feeding Anguinidae (mainly Ditylenchus filimus) were most present. Both, the Maturity Index (MI) and the fungivorous/bacterivorous ratio (f/b ratio), increase as the compost becomes more mature (ranging, respectively, from 1 to 1.86 and from 0 to 11.90). Based on these results, both indices are suggested as potential suitable tools to assess compost maturity. (C) 2009 Elsevier GmbH. All rights reserved.}, isbn = {0031-4056}, author = {Steel, H. and de la Pena, E. and Fonderie, P. and Willekens, K. and Borgonie, G. and Bert, W.} } @article {89, title = {Prochaetosoma dokdoense sp nov (Nematoda: Draconematidae) from Dokdo, Korea: First record of the genus Prochaetosoma from a shallow subtidal zone in the northwest Pacific Ocean}, journal = {Marine Biology ResearchMarine Biology Research}, volume = {6}, number = {2}, year = {2010}, note = {Rho, Hyun Soo Min, Won Gi Decraemer, Wilfrida Kim, Dong Sung}, pages = {172-188}, abstract = {A draconematid nematode Prochaetosoma dokdoense sp. nov., first discovered in December 2006 at a subtidal zone of Dokdo, Korea, the northwest Pacific Ocean, is described. This new species was obtained from coarse detritus and shell gravels. Prochaetosoma dokdoense sp. nov. differs from all the species hitherto described by the following combination of characteristics: longer slender body (910-1175 mu m), elongate loop-shaped amphidial fovea in male (distal end of ventral arm slightly curved anteriorly), eight cephalic adhesion tubes in both sexes positioned just anterior to swollen pharyngeal region, number of posterior sublateral adhesion tubes (6 in male and 6-10 in female) and posterior subventral adhesion tubes (7-8 in male and 8-9 in female), longer spicule length (78-86 mu m), long cylindro-conoid tail (114-131 mu m in male and 116-131 mu m in female) and higher ratio c{\textquoteright} (6.5-7.5 in male and 7.4-9 in female). A table comparing the major differential diagnostic characteristics of the species of the genus Prochaetosoma Micoletzky, 1922 is presented. For a reliable understanding of the geographic distribution and species identification of the genus Prochaetosoma, a pictorial key showing the relative length of non-annulated tail terminus to total tail length in both sexes is included, together with a dichotomous species identification key based on adults and fourth-stage juvenile as far as known. This is the first record of the genus Prochaetosoma in the northwest Pacific Ocean.}, isbn = {1745-1000}, author = {Rho, H. S. and Min, W. G. and Decraemer, W. and Kim, D. S.} } @article {90, title = {First Record of Trichodorus primitivus and Morphological and Molecular Identification of Longidorus elongatus from Canada}, journal = {Plant DiseasePlant Disease}, volume = {94}, number = {6}, year = {2010}, note = {Pedram, M. Niknam, G. Robbins, R. T. Decraemer, W. Ye, W. Yu, Q.}, month = {Jun}, pages = {782-782}, isbn = {0191-2917}, author = {Pedram, M. and Niknam, G. and Robbins, R. T. and Decraemer, W. and Ye, W. and Yu, Q.} } @article {91, title = {Morphological and molecular taxonomy of a new Daptonema (Nematoda, Xyalidae) with comments on the systematics of some related taxa}, journal = {Zoological Journal of the Linnean SocietyZoological Journal of the Linnean Society}, volume = {158}, number = {1}, year = {2010}, note = {Neres, Patricia Fernandes da Fonseca-Genevois, Veronica Gomes Torres, Rodrigo Augusto Cavalcanti, Mariana da Fonseca Victor de Castro, Francisco Jose Rodrigues da Silva, Neyvan Renato Rieger, Tania Tassinari Decraemer, Wilfrida}, month = {Jan}, pages = {1-15}, abstract = {A new species of Daptonema is described based upon morphological characters and 18S rRNA sequence. Daptonema matrona sp. nov. was collected in Pina Basin (north-eastern Brazil). It differs from all other species of the genus by the presence of reduced cephalic setae and straight spicules. These features require an adaptation of the generic diagnosis. Moreover, the females are characterized by intra-uterine development of the offspring, considered herein as their major autapomorphic feature. Molecular systematic analyses supported Daptonema matrona sp. nov. as a distinct genetic and evolutionary lineage. The data also indicate hypotheses of taxonomic synonymies amongst some related taxa from Xyalidae as well as the paraphyly of Daptonema. (C) 2010 The Linnean Society of London, Zoological Journal of the Linnean Society, 2010, 158, 1-15. doi: 10.1111/j.1096-3642.2009.00528.x}, isbn = {0024-4082}, author = {Neres, P. F. and da Fonseca-Genevois, V. G. and Torres, R. A. and Cavalcanti, M. D. and de Castro, F. J. V. and da Silva, N. R. R. and Rieger, T. T. and Decraemer, W.} } @article {92, title = {Burrowing nematodes from Colombia and their relationship with Radopholus similis populations, R. arabocoffeae and R. duriophilus}, journal = {NematologyNematology}, volume = {12}, year = {2010}, note = {Uribe, Gladis Emilia Munera Bert, Wim Vierstraete, Andy R. de la Pena, Eduardo Moens, Maurice Decraemer, WilfridaPart 4}, pages = {619-629}, abstract = {Two burrowing nematode populations from Colombia were characterised using morphological, morphometric and molecular criteria. The morphological and morphometric characters of the two populations did not differ from those of Radopholus similis. The phylogenetic analysis based on sequence comparison of 18S, D2D3 regions of these populations with those of Radopholus sp., R. similis and other Tylenchomorpha from GenBank confirmed the close molecular relationship between the genus Radopholus and the Hoplolaimidae. The consensus tree based on the comparison of ITS1-5.8-ITS2 rDNA sequences of the Colombian populations with R. similis (many sources), R. arabocoffeae and R. duriophilus from GenBank grouped the Colombian populations in a clade which also included R. similis from different localities. Other R. similis populations grouped in separated clades, which were closely related to the clade containing R. arabocoffeae and R. duriophilus. The high genetic variability among the R. similis populations was observed and confirmed by the high ITS1-5.8-ITS2 sequence divergence within the R. similis populations studied (5.4\%) which was comparable to the divergence (4.2-6.9\%) between the Radopholus species included in the analysis. These findings and the unresolved phylogenetic placement of R. arabocoffeae and R. duriophilus among R. similis suggests that the burrowing nematode could be a species complex. Limited information on the variability of the 18S and D2D3 region gives an indication of their possible value, besides ITS1-5.8-ITS, as molecular markers within Radopholus. No complete and comprehensible relation was found between the phylogenetic position of the Radopholus populations and their geographical origin or host.}, isbn = {1388-5545}, author = {Munera, G. E. M. and Bert, W. and Vierstraete, A. R. and de la Pena, E. and Moens, M. and Decraemer, W.} } @article {93, title = {Establishing a flatworm ageing model}, journal = {Belgian Journal of ZoologyBelgian Journal of Zoology}, volume = {140}, year = {2010}, note = {Mouton, Stijn Verdoodt, Freija Willems, Maxime Dhondt, Ineke Crucke, Jeroen Braeckman, Bart P. Houthoofd, WouterS}, month = {Jul}, pages = {195-197}, isbn = {0777-6276}, author = {Mouton, S. and Verdoodt, F. and Willems, M. and Dhondt, I. and Crucke, J. and Braeckman, B. P. and Houthoofd, W.} } @article {94, title = {Usefulness of morphological data for the study of nematode biodiversity}, journal = {NematologyNematology}, volume = {12}, year = {2010}, note = {Luc, Michel Doucet, Marcelo E. Fortuner, Renaud Castillo, Pablo Decraemer, Wilfrieda Lax, PaolaPart 4}, pages = {495-504}, abstract = {Public interest in biodiversity has never been so high, but the necessary inventory of existing species is hindered by the scarcity of taxonomists able to characterise and describe new species (alpha-taxonomy). This situation is particularly worrisome in nematology where only a small fraction of the estimated 10(5) to 10(8) existing species has been described and where experienced taxonomists are fast disappearing while the few that are still active find it increasingly difficult to publish morphological descriptions and to get financial support for biodiversity studies. The present disregard for alpha-taxonomy is said to originate from the excessive reliance by funding agencies and academic authorities on the Impact Factors attributed to scientific journals by ISI (Institute for Scientific Information). Molecular studies gave back some support and prestige to taxonomy, but that approach suffers from some limitations and it cannot be used alone for reaching taxonomic conclusions. In addition, any described DNA sequence should always be linked to a named species whose morphology has been correctly described by a trained taxonomist. The authors call for a renewed interest in alpha-taxonomy. Electronic publication according to the Code of Zoological Nomenclature would be one solution, but journals and authors seem reluctant to accept it. A variant would be to publish on paper only the diagnosis of the new species. The complete descriptions could be deposited in an Internet database but the setting-up of such a database would be a costly enterprise that would require several years of work by a team composed of morphological and molecular taxonomists and computer scientists.}, isbn = {1388-5545}, author = {Luc, M. and Doucet, M. E. and Fortuner, R. and Castillo, P. and Decraemer, W. and Lax, P.} } @article {95, title = {Cytochrome c oxidase subunit 1 analysis of Xiphinema diversicaudatum, X. pachtaicum, X. simile and X. vuittenezi (Nematoda, Dorylaimida)}, journal = {European Journal of Plant PathologyEuropean Journal of Plant Pathology}, volume = {127}, number = {4}, year = {2010}, note = {Kumari, Shesh Decraemer, Wilfrida De Luca, Francesca Tiefenbrunner, Wolfgang}, month = {Aug}, pages = {493-499}, abstract = {Genetic analyses using sequences of partial cytochrome c oxidase subunit 1 (cox1) gene of mitochondrial DNA were conducted to determine the extent of genetic variation within and among Xiphinema diversicaudatum, X. pachtaicum, X. simile and X. vuittenezi populations. Pairwise distance among the four species was 22.5 to 31.2\%. Four different sequence variants of cox1 were determined among six populations of X. diversicaudatum and three variants among three populations of X. simile. Nucleotide variation was detected at 18 of 414 bp (1.9 to 2.7\%) in X. diversicaudatum and 4 of 435 bp (0.2 to 0.9\%) in X. simile. All changes were at silent sites. No nucleotide variation was detected within three populations of X. pachtaicum and within three populations of X. vuittenezi.}, isbn = {0929-1873}, author = {Kumari, S. and Decraemer, W. and De Luca, F. and Tiefenbrunner, W.} } @article {96, title = {Molecular characterization of Xiphinema brevicollum (Nematoda: Longidoridae) from the Czech Republic}, journal = {European Journal of Plant PathologyEuropean Journal of Plant Pathology}, volume = {128}, number = {2}, year = {2010}, note = {Kumari, Shesh Decraemer, Wilfrida De Luca, Francesca}, month = {Oct}, pages = {243-250}, abstract = {Populations of Xiphinema brevicollum occurring in the Czech Republic were described morphologically and molecularly. Published species-specific primer set BL18 and BV3 was used to amplify three populations of X. brevicollum from the Czech Republic. These primers were tested against 9 species of Xiphinema and 11 species of Longidorus. Amplification was also observed for X. inaequale, X. italiae and X. lambertii. Three additional markers, mitochondrial cytochrome c oxidase subunit 1, ribosomal D2/D3 expansion segment of the 28S gene and 18S gene, were amplified and sequenced for X. brevicollum, X. inaequale and X. lambertii belonging to X. americanum-group. Comparison of cox1 sequences of X. brevicollum from the Czech Republic with X. taylori from the Slovak Republic (accession number AM086702) suggested that these populations represent the same species.}, isbn = {0929-1873}, author = {Kumari, S. and Decraemer, W. and De Luca, F.} } @article {97, title = {A Wolbachia-like endosymbiotic bacterium in the plant-parasitc nematode Rhadopholus similis}, journal = {Journal of NematologyJournal of Nematology}, volume = {42}, number = {3}, year = {2010}, note = {Haegeman Annelies, B. Vanholme Jacob, J. Vandekerckhove, T. T. M. Claeys, M. Borgonie, G. Gheysen, G.}, month = {Sep}, pages = {245-245}, isbn = {0022-300X}, author = {Haegeman, and Annelies, B. V. and Jacob, J. and Vandekerckhove, T. T. M. and Claeys, M. and Borgonie, G. and Gheysen, G.} } @book {98, title = {The Criconematidae of the World. Identification of the Family Criconematidae (Nematoda)}, year = {2010}, pages = {615}, publisher = {Academia Press}, organization = {Academia Press}, address = {Ghent}, author = {Geraert, E.} } @article {99, title = {Phylogenetic relationships, based on SSU rDNA sequences, among the didelphic genera of the family Trichodoridae from Portugal}, journal = {NematologyNematology}, volume = {12}, year = {2010}, note = {Duarte, Isabel M. de Almeida, Maria Teresa M. Brown, Derek J. F. Marques, Isabel Neilson, Roy Decraemer, WilfridaPart 2}, pages = {171-180}, abstract = {A survey of virus vector trichodorid nematodes was carried out in the central and northern regions of Portugal. Morphobiometric identification showed the presence of trichodorid species previously reported from Portugal, except for Paratrichodorus porosus, which is reported for the first time in Continental Europe. Small subunit ribosomal DNA (SSU rDNA) sequences of ten different species occurring in Portugal were obtained and a phylogenetic analysis based on their alignment was performed to infer relationships among the different Portuguese trichodorid species and three non-indigenous populations (Nanidorus minor, P. allius and P. teres). The resulting phylogenetic tree is in agreement with the currently accepted classification for Trichodoridae, except for Nanidorus, which clusters together with Trichodorus species, while the genera Paratrichodorus and Trichodorus appear as two distinct groups. A better understanding of the generic groupings in the family Trichodoridae was found. Based on the new molecular analyses we herein accept Nanidorus as a valid genus.}, isbn = {1388-5545}, author = {Duarte, I. M. and de Almeida, M. T. M. and Brown, D. J. F. and Marques, I. and Neilson, R. and Decraemer, W.} } @article {100, title = {Potential of Macrostomum lignano to recover from gamma-ray irradiation}, journal = {Cell and Tissue ResearchCell and Tissue Research}, volume = {339}, number = {3}, year = {2010}, note = {De Mulder, Katrien Kuales, Georg Pfister, Daniela Egger, Bernhard Seppi, Thomas Eichberger, Paul Borgonie, Gaetan Ladurner, Peter}, month = {Mar}, pages = {527-542}, abstract = {Stem cells are the only proliferating cells in flatworms and can be eliminated by irradiation with no damage to differentiated cells. We investigated the effect of fractionated irradiation schemes on Macrostomum lignano, namely, on survival, gene expression, morphology and regeneration. Proliferating cells were almost undetectable during the first week post-treatment. Cell proliferation and gene expression were restored within 1 month in a dose-dependent manner following exposure to up to 150 Gy irradiation. During recovery, stem cells did not cross the midline but were restricted within lateral compartments. An accumulated dose of 210 Gy resulted in a lethal phenotype. Our findings demonstrate that M. lignano represents a suitable model system for elucidating the effect of irradiation on the stem cell system in flatworms and for improving our understanding of the recovery potential of severely damaged stem-cell systems.}, isbn = {0302-766X}, author = {De Mulder, K. and Kuales, G. and Pfister, D. and Egger, B. and Seppi, T. and Eichberger, P. and Borgonie, G. and Ladurner, P.} } @article {101, title = {Marine nematode taxonomy in the age of DNA: the present and future of molecular tools to assess their biodiversity}, journal = {NematologyNematology}, volume = {12}, year = {2010}, note = {Rodrigues da Silva, Neyvan Renato da Silva, Maria Cristina Genevois, Veronica Fonseca Esteves, Andre Morgado De Ley, Paul Decraemer, Wilfrida Rieger, Tania Tassinari dos Santos Correia, Maria TerezaPart 5}, pages = {661-672}, abstract = {Molecular taxonomy is one of the most promising yet challenging fields of biology. Molecular markers such as nuclear and mitochondrial genes are being used in a variety of studies surveying marine nematode taxa. Sequences from more than 600 species have been deposited to date in online databases. These barcode sequences are assigned to 150 nominal species from 104 genera. There are 41 species assigned to Enoplea and 109 species to Chromadorea. Morphology-based surveys are greatly limited by processing speed, while barcoding approaches for nematodes are hampered by difficulties in matching sequence data with morphology-based taxonomy. DNA barcoding is a promising approach because some genes contain variable regions that are useful to discriminate species boundaries, discover cryptic species, quantify biodiversity and analyse phylogeny. We advocate a combination of several approaches in studies of molecular taxonomy, DNA barcoding and conventional taxonomy as a necessary step to enhance the knowledge of biodiversity of marine nematodes.}, isbn = {1388-5545}, author = {da Silva, N. R. R. and da Silva, M. C. and Genevois, V. F. and Esteves, A. M. and De Ley, P. and Decraemer, W. and Rieger, T. T. and Correia, M. T. D.} } @article {102, title = {Refuge From Predation, the Benefit of Living in an Extreme Acidic Environment?}, journal = {Biological BulletinBiological Bulletin}, volume = {219}, number = {3}, year = {2010}, note = {Borgonie, Gaetan Dierick, Manuel Houthoofd, Wouter Willems, Maxime Jacobs, Patric Bert, Wim}, month = {Dec}, pages = {268-276}, abstract = {Organisms living in extreme habitats require costly adaptations to cope with these conditions. Among the suggested potential benefits that trade off these costs is refuge from predation. To study these interactions in extreme environments, samples were taken in the cave Cueva de Villa Luz, Tabasco, Mexico, where more than 32 subterranean springs, some H,S rich, rise from the floor. Hydrogen sulfide gas plus oxygen is absorbed by freshwater, and oxidation forms concentrated sulfuric acid. Snottites, whitish hollow mucous tubes, hang from the ceiling of the cave. Fluid drops from these snottites were recorded as having pH values of 0-3. We report the discovery of a new species of nematode that thrives in the highly acidic environment of the snottite. Micro CT scan of snottites reveals a complex interaction between the acidic snottite, nematodes, and abundant nematode-eating mites. The nematode adaptation to low pH probably protects them against mite predation, for which nematodes are most likely the most important source of carbon in this sulfur-driven ecosystem.}, isbn = {0006-3185}, author = {Borgonie, G. and Dierick, M. and Houthoofd, W. and Willems, M. and Jacobs, P. and Bert, W.} } @article {103, title = {Morphological, morphometrical and molecular characterisation of Filenchus fungivorus n. sp., a fungivorous nematode from Japan in a most likely polyphyletic genus (Nematoda: Tylenchina)}, journal = {NematologyNematology}, volume = {12}, year = {2010}, note = {Bert, Wim Okada, Hiroaki Tavernier, Ines Borgonie, Gaetan Houthoofd, WouterPart 2}, pages = {235-246}, abstract = {Filenchus fungivorus n. sp., isolated from autumn bellflower (Gentiana scrabra Bunge) in Japan and maintained on a fungus culture, is described based on LM, SEM and molecular data. The new species is characterised by combination of the following features: two lateral lines, short body (284-331 mu m), short stylet (7.0-8.7 mu m), amphid aperture associated with characteristic depression, short ovary, undifferentiated spermatheca, post-vulval sac shorter than corresponding body diam. and short (59-80 mu m) nonfiliform, almost straight tail and absence of males. According to a principal component analysis, a small tail/ vulva-anus (1.3-1.8) and V{\textquoteright} ratio have the highest morphometrical power to separate F. fungivorus n. sp. from the remaining analysed Filenchus spp. (with the exception of F. misellus). Molecular analyses based on SSU rDNA placed F. fungivorus n. sp. within a clade that contained Filenchus sp. (heathland, Belgium), F. (Ottolenchus) discrepans, Malenchus andrassyi and F. misellus. However, the position of this clade could not be resolved within the Tylenchomorpha. Although the phylogenetic analyses, confirmed by Shimodaira-Hasegawa tests, significantly rejected the monophyly of Filenchus (P < 0.001), F. fungivorus n. sp. is placed within Filenchus in anticipation of a review of the Tylenchidae.}, isbn = {1388-5545}, author = {Bert, W. and Okada, H. and Tavernier, I. and Borgonie, G. and Houthoofd, W.} } @article {104, title = {Guitartia tridentata n. gen., n. sp (Monhysterida: Xyalidae) and Macrodontium gaspari n. gen., n. sp (Chromadorida: Microlaimidae), free-living marine nematodes from the Caribbean Sea}, journal = {NematologyNematology}, volume = {12}, year = {2010}, note = {Armenteros, Maickel Vincx, Magda Decraemer, WilfridaPart 3}, pages = {417-427}, abstract = {Two new genera of free-living marine nematodes are described from the muddy bottom of Cienfuegos Bay, Caribbean Sea. Guitartia n. gen. (Xyalidae, Monhysterida) is characterised by three long tooth-like structures in the stegostom, second and third circle of anterior sensilla separate and posterior genital branch of the female restricted to a long post-vulvar sac. The type species is Guitartia tridentata n. gen., n. sp. Within the Xyalidae, Guitartia n. gen. is morphologically close to Amphimonhystrella, Cobbia, Elzalia, Scaptrella and Valvaelaimus, all being characterised by sclerotised structures in the stoma and transverse striation of the body cuticle. Main features for discrimination are the type of stoma structure, the shape and relative size of amphidial fovea, the presence of a post-vulvar sac and gubernacular apophyses and the absence of terminal setae on the tail. Macrodontium n. gen. (Microlaimidae, Chromadorida) is characterised by a heavily sclerotised stoma with one large dorsal tooth and two smaller subventral teeth, sexual dimorphism in size and position of the amphidial fovea and males with a single anterior testis. The type species is Macrodontium gaspari n. gen., n. sp. Within the Microlaimidae, Macrodontium n. gen. is similar to the genera Acanthomicrolaimus and Bolbolaimus due to sclerotised stoma and presence of large dorsal tooth. The new genus is similar to Aponema in sexual dimorphism in the size of the amphidial fovea, monorchic males, presence of a gubernacular apophysis and conico-cylindrical tail shape. Morphological characters of diagnostic value within the family are the ornamentation of the body cuticle, relative length of cephalic sensilla, stoma sclerotisation and number of testes.}, isbn = {1388-5545}, author = {Armenteros, M. and Vincx, M. and Decraemer, W.} } @article {105, title = {Effects of organic enrichment on nematode assemblages in a microcosm experiment}, journal = {Marine Environmental ResearchMarine Environmental Research}, volume = {70}, number = {5}, year = {2010}, note = {Armenteros, Maickel Andres Perez-Garcia, Jose Ruiz-Abierno, Alexei Diaz-Asencio, Lisbet Helguera, Yusmila Vincx, Magda Decraemer, Wilfrida}, month = {Dec}, pages = {374-382}, abstract = {Marine nematodes from subtidal tropical sediments of Cienfuegos Bay were subjected to organic enrichment in a microcosm experiment for 32 days Nematode abundance and diversity decreased and the taxonomic and trophic structure was altered The results suggested that the nematodes were not food limited in the microcosms or in their natural environment. Chemical stressors such as ammonia and hydrogen sulfide derived from reduced conditions in sediments may be Important factors affecting the assemblages Hypoxic conditions occurred in all experimental units as well as in the field suggesting a nematode assemblage adapted to naturally enriched sediments However tolerant species showed a grade of sensitivity to reduced conditions In agreement with the model by Pearson and Rosenberg (1978) we predict that further organic enrichment in sediments from Cienfuegos Bay may cause a phase shift Into a strongly depleted benthic fauna and reduced conditions in water and sediments (c) 2010 Elsevier Ltd All rights reserved}, isbn = {0141-1136}, author = {Armenteros, M. and Perez-Garcia, J. A. and Ruiz-Abierno, A. and Diaz-Asencio, L. and Helguera, Y. and Vincx, M. and Decraemer, W.} }