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Hair length is negligible in thermoregulation, as some tropical mammals, such as sloths, have the same fur length as some arctic mammals but with less insulation; and, conversely, other tropical mammals with short hair have the same insulating value as arctic mammals. The denseness of fur can increase an animal's insulation value, and arctic ...
Chinchilla fur garments on display in Ushuaia. Characterized by their dense, velvety texture, chinchilla fur is one of the most expensive and luxurious of all fur types. Each follicle on a chinchilla's body produces 60 hairs, making the fur the densest of any land-dwelling mammal.
Guard hair or overhair is the outer layer of hair of most mammals, which overlay the fur. Guard hairs are long and coarse and protect the rest of the pelage (fur) from abrasion and frequently from moisture. They are visible on the surface of the fur and usually lend a characteristic contour and colour pattern.
Many mammals have fur and other hairs that serve different functions. Hair provides thermal regulation and camouflage for many animals; for others it provides signals to other animals such as warnings, mating, or other communicative displays; and for some animals hair provides defensive functions and, rarely, even offensive protection. Hair ...
Sable fur has been a highly valued item in the fur trade since the early Middle Ages, and is generally considered to have the most beautiful and richly tinted pelt among martens. Sable fur is unique because it retains its smoothness in every direction it is stroked. The fur of other animals feels rough stroked against the grain. [17]
The first clear evidence of hair or fur is in fossils of Castorocauda and Megaconus, from 164M years ago in the mid-Jurassic. [43] As both mammals Megaconus and Castorocauda have a double coat of hair, with both guard hairs and an undercoat, it may be assumed that their last common ancestor did as well. [38]
Modern mammals have Harderian glands secreting lipids to coat their fur, but the telltale imprint of this structure is only found from the primitive mammal Morganucodon and onwards. [1] Nonetheless, recent studies on Permian synapsid coprolites show that more basal therapsids may have had fur, [ 2 ] and at any rate fur was already present in ...
Awn hairs are distally thicker in comparison to down hair and have a shift in the shape towards the top of the hair. There is another version of awn hair, known as grannenflaumhaare or down awn hair, which is thin and crimped like underfur towards the proximal end of the hair, while the thickened distal end resembles the corresponding part of a ...