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Long-tailed chinchilla

Species of rodent

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  • 7 chapters

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Historically, Chilean chinchillas were reported from Talca (35°30'S), Chile, north to Peru, and also eastward, from Chilean coastal hills, throughout low mountains. No fossils of the Chilean chinchilla are known to have been found, and by the mid-19th century, Chilean chinchillas were not found south of the Choapa River in central Chile. Wild populations of Chilean chinchillas, as of 1996, occurred in Aucó (31°38'S, 71°06'W), near Illapel, IV Región, Chile, in Reserva Nacional Las Chinchillas and in La Higuera, Chile, about 100 km (62 mi) north of Coquimbo (29°33'S, 71°04'W).

Characteristics

Chinchilla laniger is smaller—wild animals have body lengths up to 260 mm (10 in)—has more rounded ears—45 mm (1.8 in) in length)—and a longer tail than C. chinchilla; its tail is usually about a third the size of its body—up to 130 mm (5.1 in) compared to 100 mm (3.9 in) in C. chinchilla. The number of caudal vertebrae is 23 in C. laniger versus 20 in C. chinchilla. Males typically weigh 369–493 g (13.0–17.4 oz) with a mean of 412 g (14.5 oz), while females weigh 379–450 g (13.4–15.9 oz) with a mean of 422 g (14.9 oz). Domesticated animals are larger than wild ones and more sexually dimorphic, with the female weighing up to 800 g (28 oz) and males up to 600 g (21 oz).

The word laniger translates into 'bearing a woolen coat', yet chinchillas do not have a woolen coat, but instead one consisting of hair. Chinchilla's hair color was originally mottled yellow-gray in the wild. Through selective breeding, their dominant colors include beige, white, and ebony, and the recessive colors include sapphire, violet, charcoal, and velvet. Their hair is 2–4 cm (0.79–1.57 in) long. It is silky, extremely soft, and firmly adhered to the skin. Up to 75 hairs, 5–11 mm (0.20–0.43 in) in diameter, emerge together from a single hair follicle. Vibrissae (whiskers) are abundant, strong, and long—100–130 mm (3.9–5.1 in)—and emerge from single follicles. The general color of their upper parts is bluish or silvery gray; the underparts are yellowish-white. The tail has long, coarse, gray and black hairs on its dorsal surface—30–40 mm (1.2–1.6 in) long near the body; 50–60 mm (2.0–2.4 in) long near the tip—and form a bristly tuft that exceeds the animal's vertebrae by 50 mm (2.0 in).

Chinchilla laniger's karyotype has 2n = 64 and FN = 126.

Chinchillas have a vertical split pupil in both eyes. They also have fleshy foot pads, which are known as pallipes. They can move the toes on their forelimbs to grasp things. Their hindlimbs tend to be longer than their forelimbs, like rabbits.

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Monotypic taxonTaxonomic group with only one subordinate taxonSpecies descriptionFormal description of a discovered speciesParaphylyType of taxonomic groupIUCN Red ListInventory of the global conservation status of biological speciesSubtropicsGeographic and climate zoneCommon nameName generally used for a taxon, group of taxa or organism(s)