Spinelli, C. Mónica; Fiorito de López, Luisa E.; Stiebel, Claudio
Histopathological changes in the gut of the lizard T. rufescens due to the parasitic worm D. galeatus are described here. Superficial damage of the mucosae due to mechanical action of bucal capsule, without involving deeper layers; their implication in the metabolism and immunity of the host.
The list of 182 localities was made from colected specimens and literature. A key for the identification of the species is included.
Echeverría, Dinorah Diana
Scanning electron microscopy shows that the buccal apparatus of Hyla pulchella pulchella larvae has a well developed and queratinized horny beack with teeth with a main cuspid. Rostrodont with heterodiontial size. Multicusped labial teeth with 10 to 12 (Mo=10) denticles in each paddle; paddle with a short neck, slightly marked. Tipic dental formulae 1,1-1/1-1,2 and 1,1-1/3 have heen observed at any of the development stages with functional teeth. Oval disc with a row of marginal papilae, and a dorsal gap. Submarginal papilae are absent. Queratodonts morfological variations might go on increasing as they make older.
Carrizo, Gustavo R.
Se realizó una revisión de las especies del género Bufo de las selvas de altura del noroeste argentino. Como resultado se describen dos nuevas especies del grupo veraguensis-typhonius, y se invalida la cita de Bufo quechua Gallardo, 1961 para el país. Mediante métodos radiológicos se confirma la relación de B. gnustae Gallardo, 1967 con el mismo grupo. Se describen dos especies nuevas del género Hyla, del norte de Argentina.
Ávila, Luciano Javier; Acosta, Juan Carlos; Martori, Ricardo
The stomachs of 109 parthenogenetic lizards of the genus Teius of the Valley of Punilla, Córdoba, Argentina, were analized to evaluate the composition and seasonal variation during the summers of 1988-1989 and 1989-1990. After the analysis, diet categories were established and frequency, volumen and the number of items consumed. The IR., Relative Index of Importance was used and the Termites, Beetles, Larvae, and Grasshoppers were the principal components of the diet.
Montanelli, Silvana B.; Echeverría, Dinorah Diana
The study of the labial teeth row distribution of 142 Ololygon fuscovaria larvae showed that it can be found two dental formulae a: 1,1-1/1-1.2 and b: 1,1-1/3. The P-1 row could have variations on b distribution, but they do not modify the formula that the tadpole gots during the premetamorphosis stages.