The Helminthological Society of Washington - Peru State College

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ENDO ET AL.—ULTRASTRUCTURE OF THE LESION NEMATODE 163 mn^i* 10 Figure 10. Transverse section of an oocyte (O) within the oviduct of P. penetrans. The oocyte is filled with large merging lipid droplets (LD) and a few protein granules (PG) that lie within the cytoplasmic matrix. of the depressor ani muscles that connect the dorsal rectal cuticle to the dorsal lateral body cuticle via hemidesmosomes. Discussion In a study of postembryogenesis, Roman and Hirschmann (1969a) determined that several species of Pratylenchus, including P. vulnus, P. coffeae, P. penetrans, P. brachyurus, P. zeae, P. neglectus, and P. crenatus, have an amphidelphic pattern of gonad development. However, the monosexual species P. scribneri follows a monodelphic pattern. In the amphidelphic species, 2 gonads develop until the fourth molt, then the posterior gonad deteriorates. The remaining gonad is prodelphic, similar to that of P. penetrans. The distal end of the telogonic gonad is occupied by an ovary with a short germinal zone and an elongated growth zone. The germinal zone contains oogonial cells that undergo rapid mitotic divisions. In the growth zone, the oocytes enlarge. The ovary is followed by a narrowly folded oviduct that is connected to the spermatheca by a 12-celled constriction (Roman and Copyright © 2011, The Helminthological Society of Washington
11 Figure 11. Longitudinal section of spermatheca of P. penetrans. The anterior boundary of the spermatheca (S) is surrounded by epithelial cells that are joined by membrane junctions (MJ). Spermatozoa (Sp) within the spermatheca contain electron-dense chromatin (C), mitochondria, and fihrHlar bundles (FB). The posteriad boundary of the spermatheca merges with enlarged columnar cells (CC) of the uterus. Columnar cells near the spermatheca contain enlarged electron-dense globules (EDG), numerous mitochondria, and ribosomes. Copyright © 2011, The Helminthological Society of Washington
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Volume 66 JOURNAL of The Helminthol
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J. Helminthol. Soc. Wash. 66(2), 19
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FIORILLO AND FONT—SEASONAL DYNAMI
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YABSLEY AND NOBLET—HELMINTHS OF R
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Page 19 and 20: MUZZALL—NEMATODES OF YELLOW PERCH
Page 27 and 28: Table 1. Comparison between the Sou
Page 29 and 30: AMIN ET AL.—PLAGIORHYNCHUS IN SOU
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Page 103 and 104: RESEARCH NOTES 195 Table 1. Prevale
Page 105 and 106: RESEARCH NOTES 197 live feature not
Page 107 and 108: RESEARCH NOTES 199 and an I- or Y-s
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Page 111 and 112: RESEARCH NOTES 203 Tenebrio molitar
Page 113 and 114: RESEARCH NOTES 205 rat intestine (M
Page 115 and 116: RESEARCH NOTES 207 Table 1. Helmint
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J. Helminthol. Soc. Wash. 662, 1999
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INDEX 215 Mastacembelidae, 52 Masta
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APPLICATION FOR MEMBERSHIP in the H
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*Edna M. Buhrer *Mildred A. Doss *
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