Achiasmate male meiosis in two Cymatia species (Hemiptera, Heteroptera, Corixidae)

By

Stoianova, Desislava
Grozeva, Snejana
Simov, Nikolay
Kuznetsova, Valentina G.

Type

Article

Date of Publication

2015

Original Publication

ZooKeys

Volume

538

Pages

95-104

Subjects

Corixoidea , karyotype , m-chromosomes , Morphology , Nepomorpha , sex chromosome post-reduction , spermatocyte meiosis

Contributed by

Pensoft Publishers

Language

English

Published by

Sofia, Bulgaria Pensoft Publishers

Identifiers

DOI: https://doi.org/10.3897/zookeys.538.6722

 

Abstract

The karyotype and male meiosis, with a particular focus on the presence or absence of chiasmata between the homologs, were studied in the water boatman species Cymatia rogenhoferi (Fieber) and C. coleoptrata (Fabricius) (Corixidae, Cymatiainae). It is shown that the species have 2n = 33 (28A+2m+X1X2Y) and 2n = 24 (20A+2m+XY) respectively, post-reduction of sex chromosomes, and achiasmate meiosis of an alignment type in males. Cytogenetic and some morphological diagnostic characters separating Cymatia Flor from the rest of Corixidae are discussed.