Share this article    

       

       

Researchs on the thelytokous parthenogenesis of two species of Oribatid mites - Trhypochthonius tectorum (Berlese) and Platynothrus peltifer (Koch) .4. Observations on atavic males

Taberly, G.


1988 - Volume: 29 Issue: 1 pages: 95-107


Keywords

Thelytokous parthenogenesis atavic males spermatogenesis hermaphrodism Oribata

Abstract

Recherches sur la parthenogenese thelytoque de deux especes d acariens oribates: Parthenogenese -The following observations on atavic males in T. leelorum and P. pellifer are reported: 1. They were found in low proportions (1 to 5 %) in all populations studied of both species, although for a given species their frequency varied from one region to another. 2. Like males of bisexual species, they were found to produce spermatophores, albeit to a lesser extent. 3. The atavic males were shown to be formed by parthenogenesis, and they can thus be considered to be somewhat rare examples of an accident of development. From a cytological point of view, they have the same number of chromosomes as females (n = 9). Spermatogenesis is similar to that in bisexual species, but stops at a late stage of spermiogenesis. Their spermatozoa are probably nonfunctional. On histological examination of genital organs, hermaphroditic structures were observed in 2 out of 43 males of T. tectorum.

Comments
Please read and follow the instructions to post any comment or correction.


Article editorial history

Date published:
1988-04-25

(CC BY 4.0)
© 1988 Taberly, G.

Dowloads

 Download full article

Download the citation

RIS with abstract 
(Zotero, Endnote, Reference Manager, ProCite, RefWorks, Mendeley)
RIS without abstract 
(Zotero, Endnote, Reference Manager, ProCite, RefWorks, Mendeley)
BIB 
(Zotero, BibTeX)
TXT 
(PubMed, Txt)

Article metrics

Number of distinct pdf views
192

Cited by: view citations with