The taxonomy of the myrmecophilous Maculinea alcon group (Lepidoptera: Lycaenidae) is highly debated. The host-plant and host-ant usage of these butterflies have conventionally been important in their identification. Maculinea 'rebeli' has generally been considered to be the xerophilous form of Ma. alcon (Ma. alcon X hereafter) with Gentiana cruciata as initial food plant. However, the type loc...

The spermatozoa of Uta stansburiana and Urosaurus ornatus show the following squamate autapomorphies: a single perforatorium extending anteriorly from the apical tip of the paracrystalline subacrosomal cone; the presence of an epinuclear electron lucent region; intermitochondrial dense bodies; and the fibrous sheath extending into the midpiece. The acrosome vesicle is flattened and concentrical...

natural population of olive baboons (Papio cynocephalus anubis) in Gombe Stream National Park, Tanzania. Parasitology 15:621–627. Rey, L. 2001. Parasitologia. 3a edição. Rio de Janeiro: Editora Guanabara-Koogan, 856 pp. Santos, S. M. C., Nogueira, C. P., Carvalho, A. R. D. and Strier, K. B. 2004. Levantamento coproparasitológico em muriqui (Brachyteles aracnhoides hypoxanthus) da Estação Biológ...

Relatively few squamate reptiles oviposit eggs with embryos at developmental stages greater than stage 30. To investigate potential proximate and ultimate bases of this phenomenon, we experimentally induced females of the lizard Urosaurus ornatus to retain their eggs past the normal time of oviposition (NTO). This procedure allowed us to determine whether the length of egg retention is fixed or...