CYTOGENETICS OF THREE BRAZILIAN GONIOSOMA SPECIES: A NEW RECORD FOR DIPLOID NUMBER IN LANIATORES (OPILIONES, GONYLEPTIDAE, GONIOSOMATINAE)

Autor:	Doralice Maria Cella, Rosângela Martins Oliveira, Adilson Ariza Zacaro, Pedro Gnaspini
Rok vydání:	2006
Předmět:	Genetics Gonyleptidae medicine.medical_specialty biology Cytogenetics Chromosome Zoology Karyotype biology.organism_classification Bivalent (genetics) Meiosis Insect Science medicine Ploidy Laniatores
Zdroj:	Journal of Arachnology. 34:435-443
ISSN:	1937-2396 0161-8202
Popis:	Currently, 60 species of harvestmen have been karyotyped and all of these are from the Nearctic and Palearctic regions. This work is the first cytogenetic report of three gonyleptid species of the suborder Laniatores: Goniosoma aff. badium, G. proximum and G. spelaeum of the Neotropical region, from the southeastern region of Brazil. Conventional Giemsa stain chromosome preparations were obtained from embryonic cells and adult male testes. Embryo mitotic plates of G. aff. badium and G. proximum indicated 88 chromosomes, and mitotic spermatogonial plates of G. spelaeum males revealed intra- and interindividual variation of chromosome number, ranging from 92–109 chromosomes. In the three analyzed species, the mitotic chromosomes were meta- or submetacentric with no obvious sex chromosomes being identified during mitosis. Prophase I spermatocytes of G. spelaeum also revealed intra- and interindividual bivalent number variation and furthermore indicated the presence of multivalence. The karyotypes of...
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::e601094c44952e4716444b7b605ae22e https://doi.org/10.1636/s04-30.1 Zobrazit plný text záznamu