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Antlers are considered one of the most exaggerated cases of male secondary sexual traits in the animal kingdom, [10] and grow faster than any other mammal bone. [11] Growth occurs at the tip, and is initially cartilage, which is later replaced by bone tissue. Once the antler has achieved its full size, the velvet is lost and the antler's bone dies.
A deer (pl.: deer) or true deer is a hoofed ruminant ungulate of the family Cervidae (informally the deer family). Cervidae is divided into subfamilies Cervinae (which includes, among others, muntjac , elk (wapiti), red deer , and fallow deer ) and Capreolinae (which includes, among others reindeer (caribou), white-tailed deer , roe deer , and ...
Baculum of a dog's penis; the arrow shows the urethral sulcus, which is the groove in which the urethra lies. Fossil baculum of a bear from the Miocene. The baculum (pl.: bacula), also known as the penis bone, penile bone, os penis, os genitale, [1] or os priapi, [2] is a bone in the penis of many placental mammals.
One comparative element he used was the skeletal measurements of a single mule deer, but he did not provide the data on sex, age or locality. However, from data provided by Klein (1964) [ 3 ] and McMahon (1975), [ 4 ] the relative lower leg length of mule deer can vary at least by 22%.
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The bones were from a large armored plant-eating mammal named Neosclerocalyptus, part of a group called glyptodonts that inhabited the Americas for more than 30 million years before going extinct ...
The Irish elk (Megaloceros giganteus), [1] [2] also called the giant deer or Irish deer, is an extinct species of deer in the genus Megaloceros and is one of the largest deer that ever lived. Its range extended across Eurasia during the Pleistocene , from Ireland (where it is known from abundant remains found in bogs) to Lake Baikal in Siberia .
File:A collection of buffalo, elk, deer, mountain sheep and wolf skulls and bones near Fort Sanders. Albany County, Wyoming. - NARA - 516956.jpg cropped 5 % horizontally and 24 % vertically using CropTool with lossless mode.