The Atlantic spiny rats are all found in the genus ''Trinomys''. They are a group of

South America South America is a continent entirely in the Western Hemisphere and mostly in the Southern Hemisphere, with a relatively small portion in the Northern Hemisphere at the northern tip of the continent. It can also be described as the sout ...

n spiny-rats in the family

Echimyidae Echimyidae is the family of neotropical spiny rats and their fossil relatives. This is the most species-rich family of hystricognath rodents. It is probably also the most ecologically diverse, with members ranging from fully arboreal to terr ...

Extant species of ''Trinomys''

Based on Natureserve.InfoNatura: Animals and Ecosystems of Latin America eb application 2007. Version 5.0 . Arlington, Virginia (USA): NatureServe. Available: http://www.natureserve.org/infonatura. The species of spiny rats in the genus ''Trinomys'' are apparently all Brazilian. In particular many of them are endemic to the Atlantic Forest of southeastern Brazil. Not much is known for certain about their

ranges In the Hebrew Bible and in the Old Testament, the word ranges has two very different meanings. Leviticus In Leviticus 11:35, ranges probably means a cooking furnace for two or more pots, as the Hebrew word here is in the dual number; or perhaps ...

however, which still are being investigated, with frequent extensions to the recorded distributions of several species in various ecological classes of forest and dry land. They do not however appear to occur at high altitudes, and several of their ranges appear to be

parapatric In parapatric speciation, two subpopulations of a species evolve reproductive isolation from one another while continuing to exchange genes. This mode of speciation has three distinguishing characteristics: 1) mating occurs non-randomly, 2) gene ...

. Most species of ''Trinomys'' are terrestrial and ambulatory, though ''Trinomys yonenagae'' is unusual that it is semi- fossorial, living in colonial burrows, and exhibits incipient specializations for

saltatorial This glossary of entomology describes terms used in the formal study of insect species by entomologists. A–C A synthetic chlorinated hydrocarbon insecticide, toxic to vertebrates. Though i ...

locomotion.

Phylogeny

Genus level

''Trinomys'' is the sister genus to the fossorial genera ''Clyomys'' and ''Euryzygomatomys''. In turn, these three genera — forming the clade of Euryzygomatomyinae — share phylogenetic affinities with a clade containing '' Carterodon'' and members of the family Capromyidae.

References

Trinomys Rodent genera Taxa named by Oldfield Thomas {{Echimyidae-stub