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Notes on the ecology and karyotypic description of Strobilurus torquatus (Sauria, Iguanidae)

Miguel Tresaut Rodrigues^I; Yatiyo Yonenaga-Yassuda^II; Sanae Kasahara^III

^IDepartamento de Zoologia, Instituto de Biociências, Universidade de São Paulo, Caixa Postal 20520, 01498 São Paulo, SP, Brasil
^IIDepartamento de Biologia, Instituto de Biociências, Universidade de São Paulo, Caixa Postal 11461, 05499 São Paulo, SP, Brasil. Send correspondence to Y.Y.-Y.
^IIIDepartamento de Biologia, Instituto de Biociências, Universidade Estadual "Júlio de Mesquita Filho", Caixa Postal 178, 13500 Rio Claro, SP, Brasil

ABSTRACT

A relatively dense population of Strobilurus torquatus was found at SR) José, near Itabuna, State of Bahia, in the Atlantic forest of Brazil. This apparently rare lizard is a forest heliophile and ant specialist that forages at several levels on the trunks of large trees and occasionally on or near the ground. Sexual dimorphism is apparent in snout-to-vent and tibia length, males being larger and having a longer tibia than females. Pregnant females have a clutch of 2-3 eggs. Cytogenetic studies showed 2n = 36 chromosomes characterized by 12 macrochromosomes and 24 microchromosomes and an XX:XY type sex determination mechanism. C-banding patterns, localization of the nucleolus organizer regions (NORs), R-banding after in vivo treatment with 5-bromodeoxyuridine (5-BrdU) and meiotic data are also presented.

Keywords: Karyotypic description; Strobilurus torquatus.

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