Rhigonema infecta(Leidy, 1849) Christie & Cobb, 1927 and the systematic position of the RhigonematidaesensuThéodoridès, 1965
✍ Scribed by Martin L. Adamson
- Publisher
- Springer Netherlands
- Year
- 1981
- Tongue
- English
- Weight
- 618 KB
- Volume
- 3
- Category
- Article
- ISSN
- 0165-5752
No coin nor oath required. For personal study only.
✦ Synopsis
from this species in possessing four rather than three post-cloacal papillae in the male. Rhigonematids have been affiliated with members of the order Oxyurida by most authors but study of R. infecta suggests that rhigonematids should be placed in their own order, the Rhigonematida. Members of the order Rhigonematida are characterized by: two spicules in the male; H-shaped excretory system; are round to oval sperms; thick and smooth egg-shell; apparently lacking a uterine layer; and development in the egg involving no moults and resulting in a long, thin, coiled larva. In contrast, oxyuridans have a single spicule, the excretory system is Xshaped, the sperm is comet-shaped and the egg-shell has a prominent striated uterine layer. Development in the egg involves at least one and probably two moults and results in a short, robust, uncoiled larva.