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Microtopography of Nippostrongylus brasiliensis (Nematoda: Heligmosomatidae): Free‐living larval stages
Author(s) -
Nembo B.,
GoudeyPerriere F.,
Gayral P.,
Perriere C.,
BrousseGaury P.
Publication year - 1993
Publication title -
journal of morphology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.652
H-Index - 74
eISSN - 1097-4687
pISSN - 0362-2525
DOI - 10.1002/jmor.1052170302
Subject(s) - biology , nippostrongylus brasiliensis , larva , anatomy , excretory system , zoology , helminths , ecology
Microtopographic features of the various growth stages of the three free‐living larval stages of the rat hookworm Nippostrongylus brasiliensis (Nematoda) were surveyed by scanning electron microscopy. These worms have a rounded anterior end and an elongated tail. Cuticular annulations were observed along the body, which also bore two ribbon‐like lateral alae. Two rings of six lip‐like lappets were observed around the triradiate oral opening in all larval stages. The cephalic space contained two lateral amphidial pits. The excretory pore in the third anterior part was observed in a ventral view of the larvae. No deirids were observed. The anus with a crescent‐shape opening was located posteriorly. Phasmidial apertures, only observed in the third‐stage larvae, opened on the lateral alae in the tail region. © 1993 Wiley‐Liss, Inc.