Estados de desarrollo en Anadia bogotensis: aportes a la comprensión de la evolución del plan corporal en Gymnophthalmoidea (Squamata)

Embryonic development in Anadia bogotensis and body plan evolution in Gymnophthalmoidea(Squamata). Gymnophthalmoidea lizards inhabit in Central and South America fromlowlands to highland Andes. This clade presents species with different body plans; lacertiformspecies exhibit short and robust bodies and well-developed limbs whereas serpentiform specieshave elongate bodies and limb reduction. Between these two extreme body plans, we foundintermediate forms such as Anadia bogotensis, with a less elongated body and limbs fully developedbut not very robust. We describe the embryonic development of Anadia bogotensis,and compare it with serpentiform species of Gymnophthalmidae, and lacertiform species ofTeiidae and Alopoglossidae. We found differences in the development time in somites andlimbs. With respect to lacertiform species, there is an accelerated development of somites inserpentiform gymnophthalmids, which is involved in body elongation. Besides, hypomorphosisis the heterochronic perturbation involved in limb reduction. Therefore, there are differences inthe development time of different structures, which are related to the evolution of body plansin Gymnophthalmoidea.