Equidae
Equidae (horses; order Perissodactyla, suborder Hippomorpha) A family that includes the modern horses, asses, and zebras (all of which are placed in a single genus
Equus, divided into six or seven species, depending on the classification used) and many extinct forms, the earliest being known from the late
Palaeocene. Sufficient of these are believed to be ancestral to modern equids for the evolution of the family to have been traced in considerable detail. The domestic horse (
E. caballus) is probably not descended from the only true living wild horse, Przewalski’s horse (
E. ferus przewalskii), but from a progenitor closely related to it. Modern equids are adapted for rapid movement: they have a short
humerus and
femur, and a long
radius and
tibia; the
ulna is reduced and fused to the radius, and the
fibula is also reduced. Only the third toe is developed. All the
incisors are present,
canines are present in males, and the cheek teeth are
hypsodont, with complex grinding surfaces. The brain is large and senses of sight, smell, touch, and hearing are highly developed. Equids are migratory grassland animals, graze mainly on grasses, and have complex social organization. Wild species are found in Africa and parts of central and western Asia. The horses are first represented in the fossil record by
Hyracotherium, which diverged from a condylarth predecessor in the Palaeocene. Numerous evolutionary lines subsequently appeared from this fox-sized prototype. Most of the evolutionary advances occurred in the New World, although the Equidae were to survive the
Pleistocene only in the Old World. The
conquistadores reintroduced horses to the Americas in the 16th century.
Cite this article
Pick a style below, and copy the text for your bibliography.
|
Rafts are made for rivers. (Outdoor Skills) (Column)
Magazine article from: Sports Afield; 3/1/1994; ; 700+ words
; ...difficult to flip a raft in most water that...canoe in a flash, rafts are a good choice...water left in autumn. Rafts can be propelled by...frame is placed on the raft and a single rower...maintaining the raft's position. for...outfitters choose Avon rafts because of their ...
|
|
RAFT Honors Leading Tech Companies on Earth Day.
Business Wire; 4/20/2009; 700+ words
; ...Jose-based Resource Area for Teaching (RAFT). At an awards ceremony held today in celebration of Earth Day, RAFT will recognize these organizations for...which come on the 15th anniversary of RAFT's founding, reflect resourcefulness...
|
|
Rafts - the current picture
Magazine article from: Folia Histochemica et Cytobiologica; 1/1/2005; ; 700+ words
; ...increasing with each new raft feature discovered. Nowadays rafts are suggested to act as...a view of the complex raft properties. Key words: Rafts - Detergent-resistant...a complete view on the raft concept. Rafts - isolation artifact or...
|
|
RAFT INTERNATIONAL: Raft International expands to support rapid growth.
M2 Presswire; 1/5/1999; 700+ words
; M2 PRESSWIRE-5 January 1999-RAFT INTERNATIONAL: Raft International expands to support rapid growth (C)1994...RDATE:040199 * Management team strengthened as demand for Raft Component Inventory soars London - Raft International, pioneers...
|
|
Raft-promotion of virion-associated cholesterol determines HIV-1 infectivity.
Newspaper article from: Obesity, Fitness & Wellness Week; 12/11/2004; 700+ words
; ...NewsRx.net) -- Raft-promotion of virion...Australia, "Lipid rafts are enriched in cholesterol...associated Brij 98 rafts in retroviral replication...importance of the raft-promoting property...of Virology (The raft-promoting property...associated Brij 98 rafts, is a determinant...
|
|
Life raft lessons: having one is not enough; in an emergency, you need to know how to deploy the life raft and board it properly. (Seamanship).(boat equipment)
Magazine article from: Motorboating; 4/1/2003; ; 700+ words
; ...buddies and I dove into that raft so fast we didn't even get...acquired a healthy interest in life rafts. I've read the literature...lives have been lost after life rafts were launched. Often, these...for one of two reasons: The raft didn't open after being deployed...
|
|
Raft trip earns vacationer nickname of 'The Screamer'
Newspaper article from: Oakland Tribune; 5/21/2005; 700+ words
; ...the camp-site, there were three large rubber rafts, raft leaders, a cook and his girlfriend. The guides instructed us to pile into one of the rafts, five people to a raft. Soon we were on our way, the leader paddling...
|
|
Quantifying raft proteins in neonatal mouse brain by 'tube-gel' protein digestion label-free shotgun proteomics.(Research)(Report)
Magazine article from: Proteome Science; 9/24/2007; ; 700+ words
; ...for the isolation of the rafts is to prepare detergent...Recent interest in lipid rafts arises from observations...partition preferentially into raft domains, and may require...and abundance in lipid rafts prepared from different...quantitation of changes in the raft protein abundance ...
|
|
Raft At The Ready.(How To)
Magazine article from: Motorboating; 6/1/2007; ; 700+ words
; ...Byline: John Clemans You can install a life raft on the bow in a couple of hours. BOAT OWNERS MAY TAKE THE PRECAUTION OF HAVING A LIFE RAFT aboard, but often they're not able to...needed. Just as important as owning a life raft and having it serviced at the intervals...
|
|
Lipid rafts reconstituted in model membranes
Magazine article from: Biophysical Journal; 3/1/2001; ; 700+ words
; ...ABSTRACT One key tenet of the raft hypothesis is that the...interactions, suggesting that rafts ought to form in model...In fact, domains with raft-like properties were...In GUVs formed from the raft lipid mixture or from...detergent-resistant lipid rafts into which glycosphingolipids...
|
|
Rafts and Rafting
Dictionary entry from: Dictionary of American History
RAFTS AND RAFTING RAFTS AND RAFTING. The raft, the simplest type of watercraft, was first constructed...early nineteenth century, almost entirely replaced the raft by the Civil War. Rafts, however, did not fall into complete obsolescence...
|
|
raft
Book article from: The Oxford Pocket Dictionary of Current English
raft 1 / raft / • n. a flat buoyant structure...flock of swimming birds or mammals: great rafts of cormorants, often 5,000 strong...1. [ intr. ] travel on or as if on a raft: I have rafted along the Rio Grande...
|
|
Raft, George
Dictionary entry from: International Dictionary of Films and Filmmakers
RAFT, George Nationality: American. Born: George...Fenady) (as Petey Cane) Publications By RAFT: articles— Interview with R...Films and Filming (London), July 1962. On RAFT: books— Yablonsky, Lewis, George...
|
|
raft parable
Book article from: A Dictionary of Buddhism
raft parable. Often-cited parable that occurs...stream by paddling across using a coracle or raft, and the Buddha asks whether it would be appropriate or not for the man to carry the raft with him once he had crossed. The parable...
|
|
raft foundation
Book article from: A Dictionary of Earth Sciences
raft foundation Type of foundation used for heavy loading, or construction on soft ground, composed of a continuous slab of reinforced concrete below the entire surface. In Venice, many of the mediaeval raft foundations underneath the large churches are made of wood.
|