Structure, development, and evolutive patterns of spermatozoa in rhabditid nematodes (Nematoda: Rhabditida). (26th August 2020)

• Record Type: Journal Article
• Authors: Slos, Dieter; Yushin, Vladimir V.; Claeys, Myriam; Ivanova, Elena S.; Kosaka, Hajime; Bert, Wim
• Is Part Of: Journal of morphology. Volume 281:Number 11(2020)
• Page Start: 1411
• Page End: 1435
• Publication Date: 2020-08-26
• Subjects: ancestral states -- BayesTraits -- evolution -- Mesquite -- phylogeny -- spermatogenesis -- spermiogenesis -- ultrastructure; Morphology -- Periodicals; Physiology -- Periodicals; Anatomy -- Periodicals; 571.3
• DOI: 10.1002/jmor.21255
• Languages: English
• ISSNs: 0362-2525

Abstract

Abstract: Spermatogenesis of five rhabditid nematodes was studied using transmission electron microscopy and is described herein. Structure and development of nematode sperm in all available representatives of the extensive order Rhabditida have been analysed and the main characteristics of each infraorder are discussed. The ancestral sperm of the order Rhabditida was reconstructed using maximum likelihood and Bayesian methods based on 44 ultrastructural sperm characters. The hypothetical ancestral spermatogenesis of the order Rhabditida agrees with the previously suggested "rhabditid" pattern and appears to be conserved throughout the order Rhabditida. Despite the enormous variation of rhabditid nematodes, few groups deviate from the ancestral pattern. This conserved pattern can be informative within the phylum Nematoda at order level, but poses limitations when used in taxonomic and phylogenetic analysis within Rhabditida. Abstract : The ancestral sperm of the nematode order Rhabditida was reconstructed with maximum likelihood and Bayesian methods based on 44 ultrastructural sperm characters. The spermatogenesis of the "rhabditid" pattern appears to be relatively‐well conserved.