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We discuss the cultural practices of Indigenous peoples from continental and insular Patagonia concerning lice, confronting historical and ethnographical records from the eighteenth to the twentieth centuries. The consumption of head lice was common practice for both continental and island Indigenous populations from southern South America, who considered them a true delicacy. Men, women, and children participated in this effective delousing activity, consuming what they obtained during head grooming. The continuous change of camp, collective delousing, type of clothing, the use of repellent paints, seal oil, and combs were some of the methods used for controlling head lice. We argue that the processes of colonial expansion of the republican states of Argentina and Chile at the end of the nineteenth century would have forced the modification of these cultural practices. Historical and ethnographic sources also reflect the tensions and contradictions between the perceptions and negative connotations of foreigners and the significance that head lice had for Indigenous populations. [ABSTRACT FROM AUTHOR]

This manuscript describes the mandibular muscles of the puma (Puma concolor), a widely sparse American carnivorous mammal. The muscles on the right and left side of the head of three specimens-two adult males and one young female-were dissected and photographed. This study increases our knowledge on the mandibular soft tissue and adds important anatomical information to the poorly known and documented musculature of this felid, the largest of the subfamily Felinae. [ABSTRACT FROM AUTHOR]

The article focuses on the species distribution of mammalia, rodentia, sigmodontinae, Akodon molinae in the localities in Argentina. It primarily discusses the taxonomic status and taxonomic aspects of A. molinae within the state. Specifically, it explores new locality records for the species in the provinces in Rio Negro and Chubut, considering as well the species existence in northeastern Patagonia. In addition, it delves into the distribution pattern undertaken by A. molinae, based from the study conducted. Further, the authors confirm the species occurrence in association with the Monte Phytogeographical Province and into ecotone areas.