761.

Tumbala Climbing Rat

Tylomys tumbalensis

French: Tylomys de Tumbala / German: Tumbala-Kletterratte / Spanish: Rata trepadora de Tumbala

Taxonomy. T ylomys tumbalensis Merriam, 1901, “Tumbala, Chiapas, Mexico.”

Tylomys tumbalensis is known from less than ten specimens collected at the type locality. It has been considered a subspecies of 1 nudicaudus . Monotypic.

Distribution. Tumbala, N Chiapas, SE Mexico.

Descriptive notes. Head-body 214 mm, tail 234 mm; weight 250 g. Back of the Tumbala Climbing Rat is dark gray. Chin, chest, and part of inguinal region are white, and toes are dark brown. Tail is naked and scaly; front one-half is blackish, and tip is white. Compared to that of sympatric Peters’s Climbing Rat (71. nudicaudus), skull, face, and nasals are thinner; bullae are slightly long; upper incisors are thin; and molars are long (9-5 mm) and heavy.

Habitat. Pine ( Pinus, Pinaceae) and oak ( Quercus, Fagaceae) forest at type locality.

Food and Feeding. No information.

Breeding. No information.

Activity patterns. No information.

Movements, Home range and Social organization. No information.

Status and Conservation. Classified as Critically Endangered on The IUCN Red List. Only one locality is known for the Tumbala Climbing Rat, less than 100 km?®. Overall population is likely in danger of decreasing due to habitat alterations from urbanization and farming.

Bibliography. Alvarez-Castafeda et al. (2015), Espinoza (2002, 2014c), Goodwin (1955b), Musser & Carleton (2005), Ramirez-Pulido, Gonzalez-Ruiz et al. (2014), Reid (2009), Vazquez (2016), Wilson & Cole (2000).