Oryzomyini

Overview

The Oryzomyini is a tribe of rodents within the family Cricetidae, subfamily Sigmodontinae. This group is commonly referred to as the rice rats, and it includes a variety of species that are primarily found in the Neotropics. Members of this tribe are adapted to a range of habitats, from marshes and wetlands to forests and grasslands.

Taxonomy

The tribe Oryzomyini is part of the larger family Cricetidae, which encompasses a diverse array of rodents. Within the subfamily Sigmodontinae, Oryzomyini is one of several tribes, distinguished by its members' ecological adaptations and morphological characteristics.

Genera

The tribe Oryzomyini includes several genera, some of which are:

• Oryzomys
• Nectomys
• Melanomys
• Sigmodontomys

Habitat and Distribution

Oryzomyini species are predominantly found in the Neotropics, ranging from the southern United States through Central America and into South America. They inhabit a variety of environments, including:

• Wetlands and marshes
• Tropical and subtropical forests
• Grasslands

Morphology

Members of the Oryzomyini tribe typically have:

• A robust body
• Long tails
• Adaptations for semi-aquatic lifestyles in some species, such as webbed feet

Behavior

Oryzomyini rodents are generally nocturnal and omnivorous. Their diet often includes seeds, fruits, and small invertebrates. Some species, like the Marsh rice rat (Oryzomys palustris), are known for their swimming abilities and are often found in wetland areas.

Conservation

The conservation status of Oryzomyini species varies. Some species are abundant and widespread, while others may be threatened by habitat loss and environmental changes.

Related pages

• Cricetidae
• Sigmodontinae
• Rodentia