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The mammals are the class of vertebrate animals characterized by the presence of mammary glands, which in females produce milk for the nourishment of young; the presence of hair or fur; and endothermic or "warm-blooded" bodies. The brain regulates endothermic and circulatory systems, including a four-chambered heart. Mammals encompass some 5,500 species (including Humans), distributed in about 1,200 genera, 152 families and up to 46 orders, though this varies with the classification scheme.

Phylogenetically, Mammalia is defined as all descendants of the most recent common ancestor of monotremes (e.g., echidnas and platypuses) and therian mammals (marsupials and placentals).

Mammal anatomy


Skeletal system

The vast majority of mammals have seven cervical vertebrae (neck bones), including bats, giraffes, whales, and humans. The few exceptions include the manatee and the two-toed sloth, which each have only six cervical vertebrae, and the three-toed sloth with nine cervical vertebrae.

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Mammalia :: Chordata
Mammalogy :: Chordates
Quaternary Studies :: Earth Sciences
Anthropology :: Social Sciences
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Q:If you and me baby are nothing like mammals, can we do it like they do ... A:I prefer Amoeba. http://formspring.me/McWilloughby/q/28773869
McWilloughby (Alec Wilby) Thu, 07 Jan 2010 19:31:07 -0000
Q:If you and me baby are nothing like mammals, can we do it like they do ... A:I prefer Amoeba. http://formspring.me/McWilloughby/q/28773869
@BrianBaute agreed. Just like the dinosaurs that didn't notice the small mammals, GM didn't notice the competition sneaking up on them.
MyCreativeTeam (Harry Hoover) Thu, 07 Jan 2010 19:29:16 -0000
@BrianBaute agreed. Just like the dinosaurs that didn't notice the small mammals, GM didn't notice the competition sneaking up on them.
you and me baby ain't nothin' but mammals, so let''s do it like they do on the discovery channel.. MWAHA :D
sonjarr (S.) Thu, 07 Jan 2010 19:28:17 -0000
you and me baby ain't nothin' but mammals, so let''s do it like they do on the discovery channel.. MWAHA :D
RT @WTFSexFacts: Humans are the only mammals on the planet that regularly drink another species' breast milk. Vets say it's bad for cats ...
willrelf1992 (William Relf) Thu, 07 Jan 2010 19:24:47 -0000
RT @WTFSexFacts: Humans are the only mammals on the planet that regularly drink another species' breast milk. Vets say it's bad for cats ...
http://Animals-Dinosaurs-Mammals.info Search to Volunteer in to save the worlds endangered animals, Hope you all have a Happy New Year
CLIXSTAR (Tim Halonen) Thu, 07 Jan 2010 19:03:39 -0000
http://Animals-Dinosaurs-Mammals.info Search to Volunteer in to save the worlds endangered animals, Hope you all have a Happy New Year
TGIF Movie 4 Teens @ No Hollywood Library Fri 1/8, 3:30-5:10pm, Free screening "The Cove," a doc about cruelty 2 ocean mammals 818-766-7185
lapubliclibrary (LAPL) Thu, 07 Jan 2010 18:54:46 -0000
TGIF Movie 4 Teens @ No Hollywood Library Fri 1/8, 3:30-5:10pm, Free screening "The Cove," a doc about cruelty 2 ocean mammals 818-766-7185

 
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Adaptation - Mammoths To Man - Educational packet of information from the Utah Education Network.

Ashfall Fossil Beds State Historical Park - Describes a 10 million year old volcanic ash deposit in Nebraska which contains the remains of rhinos, camels, horses and other mammals which once lived in the area.

In the field with Jaelyn Elberle - Collecting fossil mammals from the Early Paleocene Denver Formation, in Colorado, USA.
Meta Description: [ In the Field: Canadian Museum of Nature palaeontologist Jaelyn Eberle tracks a story of life and death when digging for fossils of mammals that survived the Great Extinction Event, near Denver, Colorado. ]

404 Mammal Jaw - Australian Cretaceous mammal discovery at Inverloch A Tribosphenic mammal from the Mesozoic of Australia
Meta Description: [ News from \ ]

500 Mammal Paleontology - Main research interests in the past have been carnivores, esp. mustelids, cervids, island faunas and the Pleistocene in general. Research of Dr Gerard F. Willemsen

Mammaliaformes- phylogenetic tree - This is Mikko Haaramo's private archive of various phylogenetic trees, starting at Mammaliaformes.

Mesozoic Mammals Showcase - Oslo University - Paleontological Museum - Description of major mesozoic mammal groups: early mammals, triconodonts and multituberculates.
Meta Description: [ Fossils on display, Geological Museum, University of Oslo, Norway: Mesozoic mammals showcase ]

Paleocene mammals of the world - Fossil Mammals of the Paleocene epoch.
Meta Description: [ Site about the fossil mammals known from the Paleocene epoch. Contains an introduction to Paleocene mammals and a list of genera and species with their classification and taxonomy. ]

404 Reconstruction of the petrosal in Late Cretaceous multituberculates (Mammalia) - First European Workshop on Vertebrate Palaeontology, Geological Museum, Copenhagen University, 1st-4th May 1996

500 Riversleigh Fossils Centre - Describes the wealth of fossil marsupials and other vertebrates which have been discovered in the rocks at Riversleigh station in far northern Queensland, Australia.
Meta Description: [ Riversleigh Fossils Centre and Mount Isa Tourist Information ]

404 Roots of the Mammalian Family Tree - Discovery of the skeleton of Jeholodens by Dr. Ji Qiang of the National Museum of China and Dr. Luo's comparative studies have offered new insight into the lives of these early Cretaceous mammals from the Liaoning Formation of China.
Meta Description: [ Carnegie Museum of Natural History conducts scientific inquiry that creates knowledge and promotes stewardship of Earth and its life; builds strategic collections to preserve evidence of that knowledge; and engages the public in the excitement of scientific discovery about the evolutionary, envir... ]

Sloth World - Online bibliography of sloth research articles. Also includes a discussion of sloths and the people who study them.

404 The Fossil Mammal Hall - A summary of the diversity of fossil mammals with the objective in mind to convey information on fundamental aspects of mammalian paleontology.

404 The Midwestern U.S. 16,000 Years Ago - Online exhibit by the Illinois State Museum depicting the mammals and other animals which lived in the Midwestern U.S. during late Pleistocene times.

Utah's Ice Age Animals - Ice Age Animals from the Utah Geological Survey
Meta Description: [ The Utah Geological Survey investigates and reports on Utah's geologic hazards, mineral, energy, water, and paleontological resources, maps the state's geology, and provides geologic and topographic information. ]

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