@article {201,
	title = {The cellular structure of the female reproductive system within the Heteroderinae and Meloidogyninae (Nematoda)},
	journal = {NematologyNematology},
	volume = {4},
	year = {2002},
	note = {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},
	pages = {953-963},
	abstract = {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},
	keywords = {Afenestrata, CELLS, CLASSIFICATION, CYST, DNA, Evolution, female genital system, GENITAL SYSTEM, Globodera, GLOBODERA-ROSTOCHIENSIS, gonad, HETERODERA, HETERODERINAE, Meloidodera, MELOIDOGYNE, morphology, Nematoda, REPRODUCTIVE-SYSTEM, SEM, SPERMATHECA, TYLENCHIDA, variable cell number},
	isbn = {1388-5545},
	author = {Bert, W. and Karssen, G. and Van Driessche, R. and Geraert, E.}
}
@article {187,
	title = {Comparative morpho-anatomical studies of the female gonoduct within the Pratylenchidae (Nematoda : Tylenchina)},
	journal = {NematologyNematology},
	volume = {5},
	year = {2003},
	note = {Times Cited: 2 Article English Bert, W State Univ Ghent, Dept Biol, Ledeganckstr 35, B-9000 Ghent, Belgium Cited References Count: 33 712QZ BRILL ACADEMIC PUBLISHERS PLANTIJNSTRAAT 2, P O BOX 9000, 2300 PA LEIDEN, NETHERLANDS LEIDEN Part 2},
	pages = {293-306},
	abstract = {The cellular morphology of the gonoduct of six Pratylenchus species, three Pratylenchoides species, Radopholus similis, Zygorylenchus guevarai, Hirschmanniella loofi and Nacobbus aberrans was revealed by dissection and light microscopy. Except for Nacobbus aberrans, all studied species show an overall similarity in gonoduct construction, i.e., an ovary often ending with a ring of cells, an oviduct formed from two rows of four cells and a 12-celled spermatheca followed by a tricolumella containing 16-24 cells. Pratylenchoides magnicauda and Z guevarai did not diverge from the other Pratylenchidae in this respect, although their gonoduct differs from that of Amplimerlinius and Meloidogyne, both formerly postulated as related genera. The spermatheca structure observed in N. aberrans has not been reported elsewhere in the Nematoda, although the uterus is similar to that reported within the Heteroderinae and Meloidogyninae and the uterus comprises more than 300 cells, enlarging from a tricolumella to a polycolumella. Transmission electron microscopy of Z guevarai revealed details of the cytoplasmatic contact between epithelial cells and the germ cells; a finger-like ovarian wall cell extension was found penetrating the oocyte. The oviduct lacks a preformed lumen and comprises eight cells with highly plicated cell membranes. The spermatheca is constructed from flattened wall cells and is followed by columnar uterus cells where evidence of eggshell formation was demonstrated},
	keywords = {CELLS, electron microscopy, ELECTRON-MICROSCOPY, GENUS, gonad, gonoduct, HETERODERINAE, Hirschmanniella, LESION NEMATODE, light microscopy, MELOIDOGYNE, microscopy, morphology, Nacobbus, Nematoda, PENETRANS NEMATA, Pratylenchoides, Pratylenchus, REPRODUCTIVE-SYSTEM, SPERMATHECA, TEM, ultrastructure, Zygotylenchus},
	isbn = {1388-5545},
	author = {Bert, W. and Van Gansbeke, R. and Claeys, M. and Geraert, E. and Borgonie, G.}
}
@article {160,
	title = {The comparative cellular architecture of the female gonoduct among Tylenchoidea (Nematoda : Tylenchina)},
	journal = {Journal of NematologyJournal of Nematology},
	volume = {38},
	number = {3},
	year = {2006},
	note = {Times Cited: 1 Article English Bert, W Univ Ghent, Dept Biol, Nematol Unit, B-9000 Ghent, Belgium Cited References Count: 30 115AX SOC NEMATOLOGISTS},
	pages = {362-375},
	abstract = {The cellular architecture of the female gonoduct of 68 nematode populations representing 42 species belonging to Tylenchidae, Belonolaimidae, Hoplolaimidae and Meloinema is shown to have an overall similarity in cellular gonoduct structure. The oviduct consists of two rows of four cells; the spermatheca is comprised of 10 to 20 cells, and the uterus cells, except in the case of Psilenchus, are arranged in four (Tylenchidae) or three (Belonolaimidae, Hoplolaimidae and Meloinema) regular rows. Although the genus Meloinema is classified within Meloidogynidae, its spermatheca is clearly hoplolaimid-like and lacks the spherical shape with lobe-like protruding cells typical of Meloidogyne. Detailed morphology of expelled gonoducts may provide a valuable character set in phylogenctic analysis, and the cellular morphology of the spermatheca appears to be a distinguishing feature at species level, especially in the genera Tylenchus and Geocenamus. Ultrastructural data on the oviduct-spermatheca region of Meloidogvne incognita complement light-microscopic (LM) results. The combination of LM of expelled organs and transmission electron microscopy (TEM) on selected sections is put for-ward as a powerful tool to combine three-dimensional knowledge with ultrastructural detail},
	keywords = {analysis, Belonolaimidae, CELLS, electron microscopy, ELECTRON-MICROSCOPY, Evolution, GENITAL SYSTEM, GENUS, gonoduct, Hoplolaimidae, MELOIDOGYNE, Meloinema, microscopy, morphology, Nematoda, NEMATODE, ORDER TYLENCHIDA, POPULATIONS, REPRODUCTIVE-SYSTEM, SPERMATHECA, taxonomy, TEM, Tylenchidae, ultrastructure},
	isbn = {0022-300X},
	author = {Bert, W. and Claeys, M. and Borgonie, G.}
}
@article {139,
	title = {Molecular phylogeny of the Tylenchina and evolution of the female gonoduct (Nematoda : Rhabditida)},
	journal = {Molecular Phylogenetics and EvolutionMolecular Phylogenetics and Evolution},
	volume = {48},
	number = {2},
	year = {2008},
	note = {Times Cited: 1 Article English Bert, W Univ Ghent, Dept Biol, Nematol Sect, Ledeganckstr 35, B-9000 Ghent, Belgium Cited References Count: 82 339CQ ACADEMIC PRESS INC ELSEVIER SCIENCE 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA SAN DIEGO},
	pages = {728-744},
	abstract = {Tylenchina are a morphologically and functionally diverse group of nematode species that range from free-living bacteriovores, over transitory grazing root-hair feeders to highly specialized plant-parasites with complex host associations. We performed phylogenetic analyses of small subunit rDNA sequences from 97 species including an analysis that account for the RNA secondary structure in the models of evolution. The present study confirms the sister relationship of the bacteriovore Cephalobiclae with the predominantly plant-parasitic Tylenchomorpha. All analyses appoint the fungal-feeding Aphelenchidae and Aphelenchoididae as being polyphyletic but the morphology based hypothesis of their monophyly could not be significantly rejected. Within the Tylenchomorpha, the families that exclusively parasitize higher plants are joined in a single clade. However, only the monophyletic position of the (super)families Hoplolaimidae and Criconematoidea were supported; Anguinidae, Tylenchidae, Belonolaimidae and Pratylenchidae appeared to be paraphyletic or polyphyletic. Parsimony and likelihood ancestral state reconstruction revealed that burrowing endoparasitism and sedentary encloparasitism each evolved, respectively, at least six and at least three times independently, mostly from migratory ectoparasitic ancestors. Only root-knot nematodes have evolved from burrowing endoparasitic nematodes. Traditional classifications are partially misled by this convergent evolution of feeding type and associated morphology. Contrastingly, mapping attributes of the gonoduct cellular architecture, including newly obtained data of 18 species belonging to the Aphelenchoidea, Criconematoidea, Anguinidae and Panagrolaimidae, revealed a broad congruence of the gonoduct characters and the molecular phylogenetic hypothesis. Yet, the presence of an offset spermatheca and proliferation of uterus cells has evolved multiple times, the latter associated with derived endoparasitic feeding specialization and resulting reproduction mode. Ancestral state reconstruction further revealed that the gonoduct of the morphologically and ecologically dissimilar tylenchid and cephalobid nematodes evolved from a common ancestor. (C) 2008 Elsevier Inc. All rights reserved},
	keywords = {analysis, ANCESTRAL CHARACTER STATES, ancestral state reconstruction, Bayesian inference, Belgium, Belonolaimidae, caenorhabditis-elegans, CELLS, CEPHALOBINA NEMATODA, CLASSIFICATION, D2-D3 EXPANSION SEGMENTS, DEVELOPMENTAL BIOLOGY, doublet model, EMBRYONIC CELL LINEAGES, Evolution, FAMILY, feeding type, gonad, gonoduct, Hoplolaimidae, long branch attraction, MODEL, MOLECULAR PHYLOGENY, morphology, Nematoda, NEMATODE, nematodes, parsimony, PHYLOGENIES, phylogeny, plant-parasitic nematodes, RHABDITIDA, ribosomal DNA, RIBOSOMAL-RNA, secondary structure model, SEQUENCE, SEQUENCES, SPERMATHECA, TYLENCHIDA, Tylenchidae, TYLENCHOIDEA NEMATODA},
	isbn = {1055-7903},
	author = {Bert, W. and Leliaert, F. and Vierstraete, A. R. and Vanfleteren, J. R. and Borgonie, G.}
}
