Sabtu, 28 Februari 2015

Tube feet
Tube feet are the many small tubular projections found on the oral face of a sea star's arms; they are characteristic of the water vasc...

Hacksaw
A hacksaw is a fine-toothed saw, originally and principally for cutting metal. They can also cut various other materials, such as plastic a...

Sediment
For sediment in beverages, see dregs. Sediment is a naturally occurring material that is broken down by processes of weathering and...

Proboscis
A proboscis / p r oÊŠ ˈ b É' s ɪ s / is an elongated appendage from the head of an animal, either a vertebrate or an invertebrate. I...

Mosasaur
Mosasaurs (from Latin Mosa meaning the 'Meuse river', and Greek σαύρος sauros meaning 'lizard') are large, extinct,...

Tuatara
Tuatara are reptiles endemic to New Zealand and which, although resembling most lizards, are part of a distinct lineage, the order Rhynchoc...

Snake
Snakes are elongated, legless, carnivorous reptiles of the suborder Serpentes that can be distinguished from legless lizards by their lack...

Sauropsida
Sauropsida ("lizard faces") is a group of amniotes that includes all existing reptiles and birds and their fossil ancestors. Saur...

Amniote
Amniotes are a clade of tetrapod vertebrates comprising the reptiles, birds and mammals which lay their eggs on land or retain the fertiliz...

Teleostomi
Teleostomi is a clade of jawed vertebrates that includes the tetrapods, bony fish, and the wholly extinct acanthodian fish. Key characters ...

Conodont
Conodonts (Greek kōnos , "cone", + odont , "tooth") are extinct chordates resembling eels, classified in the class Con...

Haikouella
Haikouella is a probable chordate from the Lower Cambrian Maotianshan shales of Chengjiang County in Yunnan Province, China. It is simila...

Nature (journal)
Nature is a prominent interdisciplinary scientific journal. It was first published on 4 November 1869. It was ranked the world's most c...

Dagger (typography)
A dagger , or obelisk , U+2020 † dagger (HTML  †   · † ), is a typographical symbol or glyph. The term "...

Cladogram
A cladogram (from Greek clados "branch" and gramma "character") is a diagram used in cladistics which shows relations...

Jaw
The jaw is any opposable articulated structure at the entrance of the mouth, typically used for grasping and manipulating food. The term ja...

Gnathostomata
Gnathostomata /ËŒneɪθɵstoʊˈmÉ'ːtÉ™/ are the jawed vertebrates. The term derives from Greek γνάθος ( gnathos ) "jaw&quo...

Cephalaspidomorphi
Cephalaspidomorphs are a group of jawless fishes named for the cephalaspids, a group of osteostracans. Most biologists regard this taxon as...

Anaspida
For the reptiles, see Anapsida; for the crustaceans, see Anaspididae Anaspida ("without shield") is an extinct group of primi...

Thelodonti
Thelodonti (from Greek: "feeble teeth") is a class of extinct jawless fishes with distinctive scales instead of large plates of a...

Pteraspidomorphi
Pteraspidomorphi is an extinct group of early jawless fish. They have long been regarded as closely related or even ancestral to jawed vert...

Hyperoartia
Hyperoartia or Petromyzontida is a disputed group of vertebrates that includes the modern lampreys and their fossil relatives. Examples of...

Agnatha
Agnatha (Greek, "no jaws") is a superclass of jawless fish in the phylum Chordata, subphylum Vertebrata, consisting of both prese...

Fishes of the World
Fishes of the World by Joseph S. Nelson is a standard reference for fish systematics. Now in its fourth edition, the work is a comprehensiv...

Vertebrate Palaeontology (Benton)
Vertebrate Palaeontology is a basic textbook on vertebrate paleontology by Michael J. Benton, published by Blackwell's. It has so far a...

University of California, Santa Cruz
The University of California, Santa Cruz (also known as UC Santa Cruz or UCSC ), is a public, collegiate university and one of 10 campuses...

Molecular clock
The molecular clock (based on the molecular clock hypothesis ( MCH )) is a technique in molecular evolution that uses fossil constraints a...

RNA
Ribonucleic acid ( RNA ) is a polymeric molecule. It is implicated in various biological roles in coding, decoding, regulation, and express...

Ribosome
The ribosome is a large and complex molecular machine, found within all living cells, that serves as the site of biological protein synthes...

Embryology
Embryology (from Greek á¼"μβρυον , embryon , "the unborn, embryo"; and -λογία , -logia ) is the branch of biology...

Hemichordate
Hemichordata is a phylum of marine deuterostome animals, generally considered the sister group of the echinoderms. They appear in the Lower...

Burgess Shale
The Burgess Shale Formation , located in the Canadian Rockies of British Columbia, is one of the world's most celebrated fossil fields. ...

Pikaia
Pikaia gracilens is an extinct animal known from the Middle Cambrian Burgess Shale of British Columbia. Sixteen specimens of Pikaia are kn...

Myllokunmingia
Myllokunmingia is a basal chordate from the Lower Cambrian Maotianshan shales of China, thought to be a vertebrate, although this is not co...

Jumat, 27 Februari 2015

Yunnanozoon
Yunnanozoon lividum ("Livid Animal of Yunnan") is an extinct deuterostome suspected of being either a hemichordate or chordate, f...

Crinoid
Crinoids are marine animals that make up the class Crinoidea of the echinoderms (phylum Echinodermata). Crinoidea comes from the Greek wor...

Sea urchin
Sea urchins or urchins ( / ˈ ər tʃ ɪ n z / ), archaically called sea hedgehogs , are small, spiny, globular animals that, with their c...

Haikouichthys
Haikouichthys / ˌ h aɪ k uː ˈ ɪ k θ ɪ s / is an extinct genus of craniate (creatures with notochords and distinct heads) believed t...

Ernietta
Ernietta is a bag-shaped erniettomorph genus that lived half-buried in sediment, and probably fed by osmosis. It had chambered walls. Its...

Ediacaran
The Ediacaran Period / iː d i ˈ æ k ər ə n / , named after the Ediacara Hills of South Australia, is the last geological period of the...

Myr
The abbreviation myr , "million years", is a unit of a quantity of 1,000,000 (i.e. 1 × 10 6 ) years. Usage Myr is in commo...

Kimberella
Kimberella is a monospecific genus of bilaterian known only from rocks of the Ediacaran period. The slug-like organism fed by scratching th...

Protostome
Protostomia (from Greek meaning "mouth first") are a clade of animals. Together with the deuterostomes and a few smaller phyla, t...

Cnidarians
This is a redirect from a title that is another name such as a pseudonym, a nickname, or a synonym of the target, or of a name associated w...

Jellyfish
Jellyfish or jellies are the major non-polyp form of individuals of the phylum Cnidaria. They are typified as free-swimming marine animals...

Tadpole
A tadpole (also called pollywog or porwigle in British English) is the larval stage in the life cycle of an amphibian, particularly that ...
 
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