Two new species of Paractinolaimus Meyl, 1957 (Nematoda: Paractinolaimidae) from the Mackenzie and Porcupine river systems, Northwest Territories, Canada

• Published in: Canadian Journal of Zoology
• Main Author: Eveleigh, Eldon S.
• Format: Article in Journal/Newspaper
• Language: English
• Published: Canadian Science Publishing 1982
• Subjects: Animal Science and Zoology; Ecology, Evolution, Behavior and Systematics; Northwest Territories; Canada; Porcupine River
• Online Access: http://dx.doi.org/10.1139/z82-020; http://www.nrcresearchpress.com/doi/pdf/10.1139/z82-020

Two new species of dorylaim nematodes, Paractinolaimus spanithelus n. sp. and Paractinolaimus longidrilus n. sp., from aquatic habitats are described and illustrated. The main differential characteristics of P. spanithelus are the small number of widely spaced supplements (12), length of sperms (9–10 μm), bluntly rounded convex–conoid shape of the male tail, and the number of pairs of caudal papillae in both sexes. Paractinolaimus longidrilus is distinguishable from closely related species by the spicule length (83 μm), the heavily cuticularized lateral guiding pieces that are broadly rounded distally, the number of pairs of caudal papillae (11) in the male, and the number of submedian ventral papillae (13) in the male.