Oryzomys balneator Thomas 1900

Wilson, Don E. & Reeder, DeeAnn, 2005, Order Rodentia - Family Cricetidae, Mammal Species of the World: a Taxonomic and Geographic Reference (3 rd Edition), Volume 2, Baltimore: The Johns Hopkins University Press, pp. 955-1189 : 1146

publication ID

https://doi.org/ 10.5281/zenodo.7316535

DOI

https://doi.org/10.5281/zenodo.11325465

persistent identifier

https://treatment.plazi.org/id/B4DC8669-3324-BB23-58D5-053F46C04DF7

treatment provided by

Guido

scientific name

Oryzomys balneator Thomas 1900
status

 

Oryzomys balneator Thomas 1900 View in CoL

Oryzomys balneator Thomas 1900 View in CoL , Ann. Mag. Nat. Hist., ser. 7, 5: 273.

Type Locality: Ecuador, Tungurahua Prov., upper Río Pastaza, 20 mi (32 km) E Baños, Mirador, 1500 m.

Vernacular Names: Ecuadoran Oryzomys.

Synonyms: Oryzomys hesperus Anthony 1924 .

Distribution: E and S Ecuador, N Perú; range extent uncertain.

Conservation: IUCN – Lower Risk (lc).

Discussion: Not a member of Oryzomys sensu stricto , but relationships obscure. In many features, balneator resembles species of Microryzomys : all are small, soft-furred oryzomyines with a long, scantily-haired tail; delicate cranium with rounded, featureless braincase and small ectotympanic bullae; narrow zygomatic plate with a shallow dorsal notch; complete carotid circulatory pattern (stapedial foramen and squamosal-alisphenoid groove present) and alisphenoid strut absent; brachyodont, pentalophodont molars with bifurcated anterocone, uppers with three roots and lowers two; and conspicuous capsular process on the mandible. Although cognizant of such similarities when composing the Microryzomys revision ( Carleton and Musser, 1989), equally numerous differences persuaded us not to include balneator within the genus. The cranium of balneator is larger and differently proportioned than both M. altissimus and M. minutus ; its interorbit is much broader and bears a slight post-orbital shelf; the zygoma are convergent anteriorly, not squared; incisive foramina are exceptionally short, terminating well anterior to the M1s; anteroconid is a single cone, not bifurcated as in Microryzomys ; the hind feet are comparatively big, more elongate over the metatarsal section, digit V short, and the plantar pad conformation correspondingly shifted. Phylogenetic studies that include representatives of such genera as Microryzomys , Oligoryzomys , and Neacomys should profitably illuminate the relationships of balneator and its generic assignment.

V

Royal British Columbia Museum - Herbarium

Kingdom

Animalia

Phylum

Chordata

Class

Mammalia

Order

Rodentia

Family

Cricetidae

Genus

Oryzomys

Loc

Oryzomys balneator Thomas 1900

Wilson, Don E. & Reeder, DeeAnn 2005
2005
Loc

Oryzomys balneator

Thomas 1900: 273
1900
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