Sex chromosome pre-reduction in male meiosis of Lethocerus patruelis (Stål, 1854) (Heteroptera, Belostomatidae) with some notes on the distribution of the species

• Main Authors: Snejana Grozeva, Valentina Kuznetsova, Nikolay Simov, Mario Langourov, Svetla Dalakchieva
• Format: Article
• Language: English
• Published: Pensoft Publishers 2013-07-01
• Series: ZooKeys
• Online Access: http://zookeys.pensoft.net/lib/ajax_srv/article_elements_srv.php?action=download_pdf&item_id=3458

The karyotype and meiosis in males of giant water bug Lethocerus patruelis (Heteroptera: Belostomatidae: Lethocerinae) were studied using standard and fluorochrome (CMA3 and DAPI) staining of chromosomes. The species was shown to have 2n = 22A + 2m + XY where 2m are a pair of microchromosomes. NORs are located in X and Y chromosomes. Within Belostomatidae, L. patruelis is unique in showing sex chromosome pre-reduction in male meiosis, with the sex chromosomes undergoing reductional division at anaphase I and equational division at anaphase II. Cytogenetic data on the family Belostomatidae are summarized and compared. In addition, the structure of the male internal reproductive organs of L. patruelis is presented, the contemporary distribution of L. patruelis in Bulgaria and in the Northern Aegean Islands is discussed, and the first information about thebreeding and nymphal development of this species in Bulgaria is provided.