n.1.(Zool.) Any one of a tribe (Sigmodontes) of rodents which includes all the indigenous rats and mice of America. So called from the form of the ridges of enamel on the crowns of the worn molars. Also used adjectively.
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
References in periodicals archive ?
Sigmodont rodents (Mammalia: Muroidea; Sigmodontinae) from the Pliocene (early Blancan) of the Verde Formation, Arizona.
The only case of a mammal known exclusively from CRs is Olygoryzomys rupestris Weksler & Bonvicino, 2005, a sigmodont rodent that has been recorded so far only in widely isolated localities: Alto Paraiso, Goias, Chapada dos Veadeiros, in Goias state, and two scattered localities in the Chapada Diamantina, northern Espinhaco range, state of Bahia.
South American marsh rats, genus Holochilus, with a summary of sigmodont rodents.
South American marsh rats of the genus Holochilus with a summary of Sigmodont rodents.