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1 December 2009 Reproduction and Sexual Dimorphism in the Whiptail Lizard Aspidoscelis gularis (Squamata: Teiidae) in Guadalcázar, San Luis Potosí, Mexico
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Abstract

We studied reproduction and sexual dimorphism of Aspidoscelis gularis from an arid environment in Guadalcázar, San Luis Potosí, Mexico. Males reached sexual maturity at a larger snout-vent length (55. 2 mm) than females (52. 4 mm). Males and females were similar in size, but males had larger heads and longer hindlimbs than females. Reproductive activity of both sexes was synchronous, similar to other species of the genus Aspidoscelis. Testicular recrudescence occurred February–March and maximum activity was March–October, and regression was in November. Vitellogenesis occurred February–September, with ovulation and fertilization occurring in June. Mean size of clutch of oviductal eggs was 3.0 ± 0.32. Size of clutch was not related to snout-vent length. Proximal factors influenced timing and intensity of reproduction in A. gularis.

Aurelio RamÍrez-Bautista, Geoffrey R. Smith, and Xóchitl Hernández-Ibarra "Reproduction and Sexual Dimorphism in the Whiptail Lizard Aspidoscelis gularis (Squamata: Teiidae) in Guadalcázar, San Luis Potosí, Mexico," The Southwestern Naturalist 54(4), 453-460, (1 December 2009). https://doi.org/10.1894/WL-25.1
Received: 9 July 2008; Accepted: 1 May 2009; Published: 1 December 2009
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