This document was constructed and is maintained by KHUONG B. NGUYEN
Entomology and Nematology Department
University of Florida

Order Rhabditida (After Maggenti, 1991)

The number of labia varies from a full complement of six to three or two or none. The tubular stoma may be composed of five or more sections called rhabdions. The three-part esophagus always ends in a muscular bulb that is invariably valved. The excretory tube is cuticularly lined and paired lateral collecting tubes generally run posteriorly from the excretory cell; some taxa have anterior tubules also. Females have one or two ovaries; when only one is present the vulva shifts posteriorly. The cells of the intestine may be uninucleate, binucleate, or tetranucleate. The hypodermal cells may also be multinucleate. Caudal alae, when present, contain papillae.
There are two suborders: Rhabditina and Cephalobina.

Suborder  Rhabditina

Stoma  cylindrical and devoid of distinct rhabdions. Its length generally two or more times as long as its width. Labial region usually distinct with cephalic papillae and porelike amphids. Esophagus four-part, basal bulb muscular and  valved . Females with one or two ovaries. Males usually with paired spicules, and a gubemaculum. Caudal alae are common on males.
    Three superfamilies are recognized: Aloionematoidea, Rhabditoidea, Bunonematoidea.

 Some Morphological Characters
 Classification of the suborder Rhabditina
 Rhabditina, Generic Identification

Other websites of the author:
 1- Florida Nematology
 2- Taxonomy of Entomopathogenic Nematodes
 3- Mole Cricket Control by Entomopathogenic Nematodes
 4- Symbiotic Bacteria of Entomopathogenic Nematodes
 5- Rhabditida: Rhabditina Generic Identification
 6- Diplogasterida, Generic Identification
 7- Rhabditida, Cephalobina, Generic Identification

If you have any question, pleaseEmail to:kbn@ufl.edu
All constructive comments are welcome

 Last updated 24 September 2009