Ecomorphological and Age-Related Adaptations in the Tongues of (Spectacled Porpoise) and (Burmeister's Porpoise) (Phocoenidae: Cetacea).

Vertebrates' tongues reflect part of their adaptations to diverse feeding strategies, the types of food items they eat, and the environments where they live. Our contribution was to analyze the macro- and microscopic morphology of the tongues of two porpoise species ( and ; juveniles and adults), whose biology is little known. Macroscopic and microscopic studies (conventional histology, scanning electron microscopy, immunohistochemistry, and morphometry) were performed.

Glycosylation in Canine Placentas.

This article describes the carbohydrate composition of early and mature placentas from bitches, detected by lectin histochemistry. Formalin-fixed placental samples from 11 mixed-breed bitches have been assigned to the 'early' or the 'mature' placenta group, processed by the routine histological technique and labelled with a panel of 14 biotinylated lectins. The glycan distribution was almost completely preserved over pregnancy.

Bovine respiratory syncytial virus infection in feedlot cattle cases in Argentina.

Although bovine respiratory syncytial virus (BRSV) infection has been reported in cattle in Argentina, it has not been associated with pneumonia in Argentina. We report here 5 cases of bovine pneumonia associated with BRSV. Autopsies were performed on 35 beef cattle with gross and/or microscopic lesions of pneumonia from 3 commercial feedlots.

Patterns of proliferation and cell differentiation during hepatic ontogeny in the alpaca.

The liver has multiple functions that change throughout ontogeny. South American camelids (SAC) have unique characteristics related to adaptation to extreme environments and metabolism. However, the process of hepatic cell differentiation has not been studied in any SAC.

Term placenta of the southern elephant seal (Mirounga leonina).

Introduction: The pinnipeds' placenta has been described as zonary, annular, labyrinthic and endotheliochorial, like that of the terrestrial carnivores. This article describes the placenta of Mirounga leonina, a phocid pinniped, focusing on some morphological features related to fetal nutrition.

Methods: Placental samples from three elephant seals were collected and conditioned after natural delivery at the Antarctic Specially Protected Area 132.