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Cytogenetic characters of Arachnocoris trinitatus Bergroth, 1916 (Insecta: Heteroptera: Nabidae) from nests of the spider Coryssocnemis simla Huber, 2000 (Araneae: Pholcidae)

Kuznetsova V.G., Grozeva S.

Abstract. The study of karyotype and testis structure has been carried out on males of the nabid bug Arachnocoris trinitatus Bergroth, 1916 collected from web nests of the pholcid spider Coryssocnemis simla Huber, 2000 in Trinidad, West Indies. Testes were shown to consist each of 3 follicles. The chromosome complement includes 2n = 12 (10 + XY). Nucleolus organizing regions (NORs) are GC-rich and are situated on the largest autosome pair. These characters match those of A. trinitatus bugs inhabiting nests of the other pholcid species Mesabolivar aurantiacus Mello-Leitão, 1930 in Trinidad.