Bilateral, perivulval cuticular pores in trichostrongylid nematodes

A new hypodermal gland was discovered in female nematodes of the family Trichostrongylidae. Because the new structure appears to be associated with the vulva, it was named the perivulval pore. It is similar, based on light and scanning electron microscopy, to phasmids that are located laterally on t...

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Bibliographic Details
Published in:The Journal of parasitology 1995-08, Vol.81 (4), p.633-636
Main Authors: Lichtenfels, J.R. (Biosystematics and National Parasite Collection Unit, ARS, USDA, Beltsville, MD.), Wergin, W.P, Murphy, C, Pilitt, P.A
Format: Article
Language:English
Subjects:
Agriculture
ANATOMIA ANIMAL
ANATOMIE ANIMALE
ANIMAL GLANDS
ANIMAL MORPHOLOGY
Animals
Biological and medical sciences
Female
Female animals
Fundamental and applied biological sciences. Psychology
GLANDE ANIMALE
GLANDULAS ANIMALES
Haemonchus - ultrastructure
hypodermal glands
Invertebrates
Male animals
Microscopy, Electron, Scanning
Morphology. Histology. Cytology
Nemathelminthia. Plathelmintha
Nematode larvae
Nematodes
Nematology
Ostertagia - ultrastructure
Parasitology
Pheromone glands
Plant parasitic nematodes
Systematics-Phylogenetics
TRICHOSTRONGYLIDAE
Trichostrongyloidea - ultrastructure
Trichostrongylus - ultrastructure
VULVA
VULVE
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Description
Summary:A new hypodermal gland was discovered in female nematodes of the family Trichostrongylidae. Because the new structure appears to be associated with the vulva, it was named the perivulval pore. It is similar, based on light and scanning electron microscopy, to phasmids that are located laterally on the tails of nematodes of the class Secernentea. Like phasmids, perivulval pores are paired and bilateral, with cuticular ducts to the surface in the areas of the lateral chords. They are located slightly posterior to the vulva in Haemonchus contortus, Haemonchus placei, Haemonchus similis, Mecistocirrus digitatus, Mazamastrongylus pursglovei, Ostertagia ostertagi, and Cooperia oncophora, but in Trichostrongylus colubriformis they are slightly anterior to the vulva. Because of the location near the vulva and the similarity in structure to phasmids, which are, at least in part, secretory, the perivulval pores should be considered as a possible source of a female attractant for males.
ISSN:0022-3395
1937-2345
DOI:10.2307/3283865