Sigmodontinae refers to a subfamily of rodents commonly found in the Americas. These small mammals are also known by several synonyms, such as the sigmodontine rodents, sigmodontines, and South American or Neotropical rodents. Other related terms include the cricetine or cricetids, which belong to the larger family of hamsters, mice, and voles. Certain species within the Sigmodontinae group also have specific names, such as the deer mice, cotton rats, and rice rats. These rodents are important components of their local ecosystems, serving as prey or predators for other animals and playing crucial roles in plant pollination and seed dispersal.