TY - JOUR T1 - The cellular structure of the female reproductive system within the Heteroderinae and Meloidogyninae (Nematoda) JF - NematologyNematology Y1 - 2002 A1 - Bert, W. A1 - Karssen, G. A1 - Van Driessche, R. A1 - Geraert, E. SP - 953 EP - 963 KW - Afenestrata KW - CELLS KW - CLASSIFICATION KW - CYST KW - DNA KW - Evolution KW - female genital system KW - GENITAL SYSTEM KW - Globodera KW - GLOBODERA-ROSTOCHIENSIS KW - gonad KW - HETERODERA KW - HETERODERINAE KW - Meloidodera KW - MELOIDOGYNE KW - morphology KW - Nematoda KW - REPRODUCTIVE-SYSTEM KW - SEM KW - SPERMATHECA KW - TYLENCHIDA KW - variable cell number AB - Gonads from living young females, representing 23 different species, were extracted to study the cellular structure of the female genital structure within the Meloidogyninae and Heteroderinae. All genera studied can be characterised by their cellular spermatheca morphology. Within Meloidogyne a spherical spermatheca is found with lobe-like protruding cells, most species having 16 to 18 spermatheca cells with interlaced cell boundaries while M. microtyla and M. ichinohei have more spermatheca cells with different cell boundaries. Heterodera and Globodera reveal a comparable gonad structure. The spermatheca cells of Heterodera are columnar and arranged in a restricted number of rows, whereas in Globodera the spermatheca cells are squarish to rounded, depending on the species. The gonad morphology of Afenestrata koreana is clearly different from what would be expected based on the related genera Globodera and Heterodera. The apparently simplest genital system was found in Meloidodera floridensis where the uterus has a limited number of cells. In the other genera studied a large and variable cell-number was found VL - 4 SN - 1388-5545 N1 - Times Cited: 4 Article English Bert, W State Univ Ghent, Dept Biol, Ledeganckstr 35, B-9000 Ghent, Belgium Cited References Count: 40 651JE BRILL ACADEMIC PUBLISHERS PLANTIJNSTRAAT 2, P O BOX 9000, 2300 PA LEIDEN, NETHERLANDS LEIDEN Part 8 ER - TY - JOUR T1 - An improved molecular phylogeny of the Nematoda with special emphasis on marine taxa JF - Molecular Phylogenetics and EvolutionMolecular Phylogenetics and Evolution Y1 - 2007 A1 - Meldal, B. H. M. A1 - Debenham, N. J. A1 - De Ley, P. A1 - De Ley, I. T. A1 - Vanfleteren, J. R. A1 - Vierstraete, A. R. A1 - Bert, W. A1 - Borgonie, G. A1 - Moens, T. A1 - Tyler, P. A. A1 - Austen, M. C. A1 - Blaxter, M. L. A1 - Rogers, A. D. A1 - Lambshead, P. J. D. SP - 622 EP - 636 KW - Adenophorea KW - analysis KW - Bayesian inference KW - BAYESIAN-INFERENCE KW - Chromadorea KW - CLASSIFICATION KW - DNA KW - DORYLAIMIDA KW - Enoplea KW - Evolution KW - FOSSIL EVIDENCE KW - Globodera KW - Hoplolaimidae KW - LogDet transformation KW - marine nematodes KW - MITOCHONDRIAL-DNA KW - N-SP KW - Nematoda KW - NEMATODE KW - nematodes KW - parsimony KW - phylogenetic reconstruction KW - PHYLOGENIES KW - phylogeny KW - PHYLUM NEMATODA KW - RHABDITIDA KW - RIBOSOMAL-RNA GENE KW - Secernentea KW - SEQUENCES KW - SSU rDNA KW - systematics KW - taxonomy AB - Phylogenetic reconstructions of relations within the phylum Nematoda are inherently difficult but have been advanced with the introduction of large-scale molecular-based techniques. However, the most recent revisions were heavily biased towards terrestrial and parasitic species and greater representation of clades containing marine species (e.g. Araeolaimida, Chromadorida, Desmodorida, Desmoscolecida, Enoplida, and Monhysterida) is needed for accurate coverage of known taxonomic diversity. We now add small subunit ribosomal DNA (SSU rDNA) sequences for 100 previously un-sequenced species of nematodes, including 46 marine taxa. SSU rDNA sequences for > 200 taxa have been analysed based on Bayesian inference and LogDet-transformed distances. The resulting phylogenies provide support for (i) the re-classification of the Secernentea as the order Rhabditida that derived from a common ancestor of chromadorean orders Araeolaimida, Chromadorida, Desmodorida, Desmoscolecida, and Monhysterida and (ii) the position of Bunonema close to the Diplogasteroidea in the Rhabditina. Other, previously controversial relationships can now be resolved more clearly: (a) Alaimus, Campydora, and Trischistoma belong in the Enoplida, (b) Isolaimium is placed basally to a big clade containing the Axonolaimidae, Plectidae, and Rhabditida, (c) Xyzzors belongs in the Desmodoridae, (d) Comesomatidae and Cyartonema belongs in the Monhysterida, (e) Globodera belongs in the Hoplolaimidae and (0 Paratylenchus dianeae belongs in the Criconematoidea. However, the SSU gene did not provide significant support for the class Chromadoria or clear evidence for the relationship between the three classes, Enoplia, Dorylaimia, and Chromadoria. Furthermore, across the whole phylum, the phylogenetically informative characters of the SSU gene are not informative in a parsimony analysis, highlighting the short-comings of the parsimony method for large-scale phylogenetic modelling. (c) 2006 Elsevier Inc. All rights reserved VL - 42 SN - 1055-7903 N1 - Times Cited: 2 Review English Meldal, B. H. M Univ Cambridge, Hutchison MRC Res Ctr, Dept Oncol, Addenbrookes Hosp, Hills Rd, Cambridge CB2 0XZ, England Cited References Count: 102 157KB ACADEMIC PRESS INC ELSEVIER SCIENCE 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA SAN DIEGO ER -