Cricetidae
Author
Don E. Wilson
Author
Russell A. Mittermeier
Author
Thomas E. Lacher, Jr
text
2017
2017-11-30
Lynx Edicions
Barcelona
Handbook of the Mammals of the World – Volume 7 Rodents II
204
535
book chapter
80832
10.5281/zenodo.6707142
ab66b2b7-9544-4411-bf61-5bc3651d7bca
978-84-16728-04-6
6707142
461.
White-throated Montane Forest Rat
Drymoreomys albimaculatus
French:
Oryzomys
a gorge blanche
/
German:
Serra-do-MarReisratte
/
Spanish:
Rata de bosque de
montana
de garganta blanca
Taxonomy.
Drymoreomys albimaculatus Percequillo, Weksler & L. P. Costa, 2011
,
Base do Carmo,
700 m
, Parque Estadual Intervales,
Sao Paulo
,
Brazil
.
Drymoreomys albimaculatus
is the type species of the genus. Monotypic.
On following pages: 462. Gray Rice Rat (
Eremoryzomys polius
); 463. Medium-tailed Rice Rat (
Eremoryzomys
mesocaudis Brazilian False Rice Rat (
Pseudoryzomys simplex
); 467. Venezuelan Marsh Rat (
Holochilus venezuelae
); 468. Amazonian (
Holochilus brasiliensis
); 471. Crafty Marsh Rat (
Holochilus
vulpinus); 472. Lagiglia’s Marsh Rat (
Holochilus
lagiglia Rat (
Cerradomys maracajuensis
); 476. Lindbergh's Rice Rat (
Cerradomys
scott); 477. Akroa Rice Rat (
Cerradomys Goytaca Rice Rat
(
Cerradomys goytaca
); 481. Ucayali Water Rat (
Amphinectomys savamis
); 482. Trinidad Water Rat Rat (
Nectomys apicalis
); 485. South American Water Rat (
Nectomys rattus
); 486. Atlantic Water Rat (
Nectomys squamipes
), 464. Lund'’s Water Rat (
Lundomys molitor
); 465. Paraguayan Rice Rat (
Sooretamys angouya
); 466. Marsh Rat (
Holochilus sciureus
); 469. Chacoan Marsh Rat (
Holochilus chacarius
); 470. Brazilian Marsh Rat); 473. Langguth’s Rice Rat (
Cerradomys langguthi
); 474. Vivo's Rice Rat (
Cerradomys vivoi
); 475. Maracaju Rice akroal); 478. Marinho's Rice Rat (
Cerradomys marinhus
); 479. Terraced Rice Rat (
Cerradomys subflavus
); 480. (
Nectomys palmipes
); 483. Magdalena Water Rat (
Nectomys magdalenae
); 484. Western Amazonian Water
).
Distribution.
Serra do Mar in SE Brazil (from Sao Paulo to Santa Catarina states).
Descriptive notes.
Head-body 115-149 mm, tail 142-176 mm, ear 20 mm, hindfoot 28-30 mm; weight 46-5-58 g¢. The White-throated Montane Forest Rat is medium-sized, with long tail (118-132% of head-body length), small ears (13-16% of head-body length), and short pes (19-24% of head-body length). Dorsal fur is very long, extremely dense, lax, and dull orange to fulvous buff, weakly grizzled with reddish brown; ventral pelage is woolly and grayish, except in gular and thoracic regions with pure white hair. Ears are rounded and covered with short golden hair. Mystacial vibrissae usually extend posteriorly beyond pinnae when laid back. Dorsal surface of manus is covered by brown hairs, and digits are covered with white and silvery hairs. Pes is short and moderately wide; plantar pads are very large and fleshy, and dorsal surface of pes is densely covered with brown hair. Tail is unicolored and densely covered with short and stiff brown hair. Chromosomal complement is 2n = 62, FN = 62.
Habitat.
Atlantic Forest environments of dense and humid primary and secondary montane and premontane forests on eastern slopes of the Serra do Mar at elevations of 650-1200 m.
Food and Feeding.
No information.
Breeding.
The White-throated Montane Forest Rat breeds year-round.
Activity patterns.
The White-throated Montane Forest Rat is nocturnal. It has anatomical characteristics of arboreal taxa (e.g. very developed plantar pads) but has been collected almost exclusively on the ground in pitfall traps.
Movements, Home range and Social organization.
No information.
Status and Conservation.
Not assessed on [UCN Red List. Taking into account fragmented nature of Atlantic Forest in southern Brazil, it has been suggested that the White-throated Montane Forest Rat should be classified as Near Threatened.
Bibliography.
Bueno (2008), Pardini & Umetsu (2006), Percequillo & Weksler (2015), Percequillo, Weksler & Costa (2011), Suérez-Villota et al. (2013).