Isothrix sinnamariensis Vie et al. 1996
Creators: name: Don E. Wilson
name: Thomas E. Lacher, Jr
name: Russell A. Mittermeier
Publisher: name: Lynx Edicions
Year: 2016
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Mammalia
Rodentia
Echimyidae
Isothrix
Isothrix sinnamariensis

description: 59.
Sinnamary Brush-tailed Rat
Isothrix sinnamariensis
French: Rat-épineux du Sinnamary / German: Sinnamary-Borstenschwanzratte / Spanish: Rata de cola de cepillo de Sinnamary
Taxonomy. Isothrix sinnamariensis Vié et al., 1996,
“Sinnamary River right bank, 21 km upstream from the Petit Saut Dam, French Guiana (4°56-80’N-53°1-90’"W—altitude below 20 m).”
This species is monotypic.
Distribution. Coast of French Guiana SW to S Suriname and Guyana.
Descriptive notes. Head-body 212-215 mm, tail 262 mm. No specific data are available for body weight. The Sinnamary Brush-tailed Rat is small, similar in most respects to the Plain Brush-tailed Rat (1. pagurus). Dorsum is dark brown, somewhat more reddish brown over rump and hindquarters. Nose is slightly reddish brown. There are small black spots behind eyes, from which long vibrissae emanate. Ears are rounded and short, with small tufts of hair on inner and outer surfaces. Female Sinnamary Brush-tailed Rats have four pairs of lateral nipples and two inguinal ones. Tail is long and 124% of head-body length. Basal part oftail has short muff of dense hairs but otherwise is covered along its entire length by curled hairs, terminating in tuft of long hairs (35 mm) that coil downward. Patch of white hairs is present in ventral urogenital area. Hindfeet are broad, each digit possessing strong claws partially covered by short, pale hairs at base. It has typical craniodental characteristics of other species of Isothrix but differs from its close relative, the Plain Brush-tailed Rat, by its somewhat shorter maxillary tooth rows. Chromosomal complementis 2n = 28 and FN = 42.
Habitat. [Lowland rainforest in seasonally inundated and non-flooded, tall upland forests and non-flooded tall hill evergreen forest from near sea level to elevations of ¢.270 m. The Sinnamary Brush-tailed Rat is arboreal and builds nest in trees.
Food and Feeding. There is no information available for this species.
Breeding. There is no information available for this species.
Activity patterns. There is no information available for this species.
Movements, Home range and Social organization. There is no information available for this species.
Status and Conservation. Classified as Least Concern on The IUCN Red List. Flooding from filling of the Petit Saut Dam destroyed habitat of the type locality of the Sinnamary Brush-tailed Rat in French Guiana. Additional studies on distribution, habitat, abundance, ecology, and conservation threats to Sinnamary Brush-tailed Rat are needed.
Bibliography. Eisenberg & Redford (1999), Emmons (1990, 1997a, 2005), Lim & Joemratie (2011), Patton etal. (2015), Vie et al. (1996), Woods (1993), Woods & Kilpatrick (2005).
description: Published as part of Don E. Wilson, Thomas E. Lacher, Jr & Russell A. Mittermeier, 2016, Echimyidae, pp. 552-604 in Handbook of the Mammals of the World – Volume 6 Lagomorphs and Rodents I, Barcelona :Lynx Edicions on page 583, DOI: 10.5281/zenodo.6623649