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

Authors: Stoianova, Desislava Countries: Bulgaria, Kazakhstan DOI: 10.3897/zookeys.538.6722 Published: Jan. 1, 2015 Source: ZooKeys OpenAlex: View in OpenAlex

Collection: Pensoft Publishers

Keywords: Karyotype · Topics: Child and Adolescent Psychosocial and Emotional Development, Early Childhood Education and Development

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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.

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