What are the three families of pinnipeds?
Pinnipeds are separated into three groups: earless seals, eared seals and walruses. Sometimes referred to as earless seals or true seals, marine mammals in the phocid family can be easily identified by looking at their ears and flippers.
Where does the word pinniped come from?
The name pinniped comes from the Latin pinna and pedis meaning “feather-footed” referring to the paddle-like fore and hind limbs of seals, sea lions, and walruses.
What ivory is used for?
Historically, it was used to produce ornaments, figurines, and small carvings, as well as items like jewelry, piano keys, and chess sets. Traditional medicine also views ivory as a healing element, using ivory powder to create medicine for a variety of illnesses.
How many types of pinnipeds are there?
Sea lionsWalrusEarless sealsEared sealWalrusesOtarioidea
What is a pinniped mean?
Definition of pinniped : any of an order or suborder (Pinnipedia) of aquatic carnivorous mammals (such as a seal or walrus) with all four limbs modified into flippers.
Are pig tusks ivory?
Toward the distal end, or tip, the tusk consists of solid ivory. The outer surface is smooth but may, especially at the tip, be marred by fine black cracks penetrating the ivory within (Plate la-h).
What are the examples of pinnipeds?
The pinnipeds are a group of 33 species of aquatic fin-footed mammals composing three families: the true seals (family Phocidae), the fur seals and sea lions (family Otariidae), and the walrus (family Odobenidae). Pinnipeds live only in rich marine environments and a few inland or tropical freshwater systems.
Where are pinnipeds found?
Living pinnipeds mainly inhabit polar and subpolar regions, particularly the North Atlantic, the North Pacific and the Southern Ocean. They are entirely absent from Indomalayan waters. Monk seals and some otariids live in tropical and subtropical waters.
Are teeth made of bone?
Unlike your bones, enamel doesn’t contain any living tissues. Beneath your tooth’s enamel, there’s a bone-like tissue called dentin, which makes up most of your teeth’s structure. It’s susceptible to the bacteria that cause tooth sensitivity and cavities. Cementum is present in the next layer.
Who invented false teeth?
In 1728, Pierre Fauchard wrote about crafting false teeth from wire brackets and hand-carved animal bone. In 1774, Alexis Duchâteau made the first porcelain dentures.
Why are elephant teeth so expensive?
It has no intrinsic value, but its cultural uses make ivory highly prized. In Africa, it has been a status symbol for millennia because it comes from elephants, a highly respected animal, and because it is fairly easy to carve into works of art.
What are the types of pinnipeds?
What type of animals are sirenians?
The Sirenia (/saɪˈriːniə/), commonly referred to as sea-cows or sirenians, are an order of fully aquatic, herbivorous mammals that inhabit swamps, rivers, estuaries, marine wetlands, and coastal marine waters.