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

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 Cymatia coleoptrata (Fabricius) (Corixidae, Cymatiainae). It is shown that the species have 2n =...

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Detalles Bibliográficos
Autores principales: Stoianova, Desislava, Grozeva, Snejana, Simov, Nikolay, Kuznetsova, Valentina
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Pensoft Publishers 2015
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4722919/
https://www.ncbi.nlm.nih.gov/pubmed/26807038
http://dx.doi.org/10.3897/zookeys.538.6722
Descripción
Sumario: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 Cymatia coleoptrata (Fabricius) (Corixidae, Cymatiainae). It is shown that the species have 2n = 33 (28A+2m+X(1)X(2)Y) 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.