Ctenomys torquatus Lichtenstein 1830
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
Ctenomyidae
Ctenomys
Ctenomys torquatus

description: 30.
Collared Tuco-tuco
Ctenomys torquatus
French: Tuco-tuco a collier / German: Halsbandkammratte / Spanish: Tuco tuco de collar
Taxonomy. Ctenomys torquatus Lichtenstein, 1830.
“Das Vaterland dieses Thiers sind die stdlichen Provinzen Brasiliens und die Ufer des Uruguay, wo es malwurfartig unter der Erde lebt.” As summarized by C. J. Bidau in 2015, the actual type locality is still uncertain.
Ctenomys torquatus was initially classified in the Eastern group, based on biogeography; results from molecular phylogeny analysis placed it in the ftorquatusspecies group. Chromosomal complementis 2n = 40, 42, 44 and 46 and FN = 72, and sperm is symmetric. Monotypic.
Distribution. SE Brazil (S Rio Grande do Sul State) to N & C Uruguay.
Descriptive notes. Head-body 167-230 mm (males) and 152-200 mm (females), tail 55— 85 mm (males) and 60-83 mm (females), hindfoot 28-35 mm (males) and 29-33 mm (females). These data for two Uruguayan samples show differences between males and females. No specific data are available for body weight. The Collared Tuco-tuco is small-sized. Dorsum is brownish orange, becoming lighter toward sides; venter is pale brownish orange, with inguinal and axillary whitish spots. Typical collar is pale brownish orange; white spots are also present below and behind ears. Melanistic individuals occur in some populations. Skull is more curved than that of the Minute Tuco-tuco (C. minutus). Dorsal surface of frontal and parietal bones show small bulges and temporal ridges that converge near midline posteriorly without forming sagittal crest. Upper incisors are more proodont than those of the Minute Tuco-tuco. Baculum of the Collared Tuco-tuco is relatively short, with mean length of 0-64 cm and rounded proximal and distal tips.
Habitat. Sandy soils in open fields and fields with gallery forests of the Pampas ecoregion. The Collared Tuco-tuco is common in cultivated fields, pastures, and even vacant lots in the city of Montevideo.
Food and Feeding. There is no information available for this species.
Breeding. Gestation of the Collared Tuco-tuco is ¢.107 days, and females give birth to 2-3 young.
Activity patterns. There is no information available for this species.
Movements, Home range and Social organization. The Collared Tuco-tuco is solitary.
Status and Conservation. Classified as Least Concern on The IUCN Red Lust.
Bibliography. Bidau (2015), Contreras & Bidau (1999), Freitas (1995a, 2006), Freitas & Lessa (1984), Goncalves & Freitas (2009), Goncalves et al. (2012), Kiblisky et al. (1977), Langguth & Abella (1970), Lichtenstein (1830), Medina et al. (2007), Parada et al. (2011), Reig & Kiblisky (1969), Reig et al. (1966), Rocha-Barbosa et al. (2013), Roratto et al. (2015).
description: Published as part of Don E. Wilson, Thomas E. Lacher, Jr & Russell A. Mittermeier, 2016, Ctenomyidae, pp. 498-534 in Handbook of the Mammals of the World – Volume 6 Lagomorphs and Rodents I, Barcelona :Lynx Edicions on pages 522-523, DOI: 10.5281/zenodo.6588177