Ctenomys ibicuiensis, Freitas, Fernandes, Fornel & Roratto, 2012

Don E. Wilson, Thomas E. Lacher, Jr & Russell A. Mittermeier, 2016, Ctenomyidae, Handbook of the Mammals of the World – Volume 6 Lagomorphs and Rodents I, Barcelona: Lynx Edicions, pp. 498-534 : 521

24.

Ibicui Tuco-tuco

Ctenomys ibicuiensis

French: Tuco-tuco de | 'lbicui / German: Ibicui-Kammratte / Spanish: Tuco tuco de Ibicui

Taxonomy. Ctenomys ibicuiensis Freitas et al., 2012 ,

“Manoel Viana, in central-western Rio Grande do Sul, southern Brazil, 20°923°37” §, 55°25°43” W.”

Ctenomys ibicuiensis belongs to the torquatusspecies group. Chromosomal complement is 2n = 50 and FN = 68, and sperm form is symmetric. Monotypic.

Distribution. S Brazil, known only from six sites, four in Manoel Viana and two in Macambara municipalities, W Rio Grande do Sul State.

Descriptive notes. Total length average 234 mm,tail average 75 mm, hindfoot average 37 mm (with claws) and 33 mm (without claws); weight average 200 g. The Ibicui Tuco-tuco is small.

Habitat. Sand dunes and grasslands at an average elevation of ¢.200 m. Habitats of the Ibicui Tuco-tuco are now degraded by agricultural activities and desertification.

Food and Feeding. The Ibicui Tuco-tuco generally feeds on grass and bushes.

Breeding. Breeding of the Ibicui Tuco-tuco occurs in June-December, and litter sizes are 1-3 young.

Activity patterns. There is no information available for this species.

Movements, Home range and Social organization. The Ibicui Tuco-tuco is solitary.

Status and Conservation. The Ibicui Tuco-tuco has not yet been assessed on The IUCN Red List. It has a narrow geographic distribution in a small area (around 500 km?) thatis suffering from anthropogenic pressure, so it could be considered threatened.

Bibliography. Bidau (2015), Freitas et al. (2012).

Figures

23. D’Orbigny’s Tuco-tuco (Ctenomys dorbignyi), 24. Ibicui Tuco-tuco (Ctenomys ibicuiensis), 25. Lami Tuco-tuco (Ctenomys lami), 26. Minute Tuco-tuco (Clenomys minutus), 27. Pearson’s Tuco-tuco (Ctenomys pearsoni), 28. Perrens’s Tuco-tuco (Ctenomys perrensi), 29. Roig’s Tuco-tuco (Ctenomys roigi), 30. Collared Tuco-tuco (Ctenomys torquatus), 31. Pundt’s Tuco-tuco (Clenomys pundit), 32. Talas Tuco-tuco (Ctenomys talarum), 33. Flamarion’s Tuco-tuco (Ctenomys flamarioni), 34. Mendoza Tuco-tuco (Ctenomys mendocinus), 35. Cinnamon Tuco-tuco (Clenomys porteousi), 36. Rio Negro Tuco-tuco (Ctenomys rionegrensis), 37. Dune Tuco-tuco (Ctenomys australis), 38. White-bellied Tuco-tuco (Clenomys colburni), 39. Coyhaique Tuco-tuco (Cienomys coyhaiquensis), 40. Lago Blanco Tuco-tuco (Ctenomys fodax), 41. Patagonian Tuco-tuco (Ctenomys haigi), 42. Magellanic Tuco-tuco (Ctenomys magellanicus), 43. Silky Tuco-tuco (Ctenomys sericeus)

Distribution. S Brazil, known only from six sites, four in Manoel Viana and two in Macambara municipalities, W Rio Grande do Sul State.