Cronopio dentiacutus

Cronopio dentiacutus was established as a scientific taxon based on fossil material recovered from the La Buitrera locality (Candeleros Formation, Río Negro province) dating to the early Cenomanian (early Late Cretaceous, ~99.6–96 Ma). The holotype (MPCA PV 454) and referred specimens (MPCA PV 450, MPCA PV 453) were described in the paleontological literature and popularized in press accounts. The genus name intentionally references the 'cronopios' of Argentinian writer Julio Cortázar, while the specific epithet dentiacutus derives from Latin for 'sharp-toothed'.

Known material includes a partial skull (holotype MPCA PV 454; ~27 mm long) missing some elements (skull roof, basicranium, squamosals) and referred partial jaws (MPCA PV 450, MPCA PV 453). The fossils indicate a very small, shrew-sized mammal with an elongate snout and pronounced, sharply pointed teeth — the dentition emphasized by the specific name and popular descriptions as 'saber-toothed'. Reconstructions are necessarily partial and based on fragmentary cranial and mandibular remains.

As a fossil taxon, Cronopio dentiacutus has no supernatural abilities. Scientific inferences from the material identify it as a small insectivorous mammal (dietary interpretation supported in source descriptions) and place it within the diversity of meridiolestidan/dryolestoid mammals of Cretaceous South America, indicating an ecological role as a small insectivore among contemporaneous vertebrates.