A cephalopod (Greek Greek , an independent branch of the Indo-European family of languages, is the language of the Greeks. Native to the southern Balkans, it has the longest documented history of any Indo-European language, spanning 34 centuries of written records. In its ancient form, it is the language of classical ancient Greek literature and the New Testament of plural Κεφαλόποδα (kephalópoda); "head-feet") is any member of the mollusc Mollusks[note 1] belong to the animal phylum Mollusca. There are around 93,000 recognized extant species, making it the largest marine phylum containing about 23% of named marine organisms. Representatives live in marine, freshwater, and terrestrial habitats. Mollusk are highly diverse: in size; in anatomical structure; in behaviour and in habitat class In biological classification, rank is the level in a taxonomic hierarchy. The most basic rank is that of species, the next most important is genus, and then family. Sometimes (but only rarely) the term "taxonomic category" is used instead of "rank" Cephalopoda, characterized by bilateral body symmetry Symmetry in biology is the balanced distribution of duplicate body parts or shapes. The body plans of most multicellular organisms exhibit some form of symmetry, either radial symmetry or bilateral symmetry or "spherical symmetry". A small minority exhibit no symmetry, a prominent head, and a modification of the mollusk foot, a muscular hydrostat A muscular hydrostat is a biological structure found in animals. It is used to manipulate items or to move its host about and consists mainly of muscles with no skeletal support. It performs its hydraulic movement without fluid in a separate compartment, as in a hydrostatic skeleton. The principle behind the hydrostatic skeleton is that water is, into the form of arms By definition, cephalopod arms have suckers along most of their length, as opposed to tentacles, which have suckers only near their ends.[citation needed] or tentacles Tentacles can refer to the elongated flexible organs that are present in some animals, especially invertebrates, and sometimes to the hairs of the leaves of some insectivorous plants. Usually, they are used for feeding, feeling and grasping. Anatomically, they work like other muscular hydrostats. Teuthology, a branch of malacology Malacology is the branch of invertebrate zoology which deals with the study of mollusca , the second-largest phylum of animals in terms of described species after the arthropods. One division of malacology, conchology, is devoted to the study of mollusk shells, is the study of cephalopods.
The class contains two extant Extant is a term commonly used in biology to refer to taxa that are still in existence (living). The term extant contrasts with extinct. For example, Brandt's Cormorant is an extant species, while the Spectacled Cormorant is an extinct species. Likewise, of the group of molluscs known as the cephalopods, there are approximately 600 extant species subclasses In biological classification, rank is the level in a taxonomic hierarchy. The most basic rank is that of species, the next most important is genus, and then family. Sometimes (but only rarely) the term "taxonomic category" is used instead of "rank". In the Coleoidea, the mollusk shell has been internalized or is absent; this subclass includes the octopuses The octopus is a cephalopod of the order Octopoda. Octopuses have two eyes and four pairs of arms and like other cephalopods are bilaterally symmetric. An octopus has a hard beak, with its mouth at the center point of the arms. Most octopuses have no internal or external skeleton, allowing them to squeeze through tight places. Octopuses are highly, squid Squid are marine cephalopods of the order Teuthida, which comprises around 300 species. Like all other cephalopods, squid have a distinct head, bilateral symmetry, a mantle, and arms. Squid, like cuttlefish, have eight arms and two longer tentacles arranged in pairs, and cuttlefish Cuttlefish are marine animals of the order Sepiida belonging to the class Cephalopoda . Despite their common name, cuttlefish are not fish but mollusks. Recent studies indicate that cuttlefish are among the most intelligent invertebrates. In the Nautiloidea Nautiloids are a group of marine mollusks in the subclass Nautiloidea, which all possess an external shell, the best-known example being the modern nautiluses. They flourished during the early Paleozoic era, where they constituted the main predatory animals, and developed an extraordinary diversity of shell shapes and forms. Some 2,500 species of, the shell remains; this subclass includes the nautilus Nautilus is the common name of marine creatures of cephalopod family Nautilidae, the sole extant family of suborder Nautilina. It comprises six species in two genera, the type of which is genus Nautilus. Though it more specifically refers to species Nautilus pompilius, the name chambered nautilus is also used for any species of the Nautilidae. About 800 distinct living species There are many definitions of what kind of unit a species is . A common definition is that of a group of organisms capable of interbreeding and producing fertile offspring of both genders, and separated from other such groups with which interbreeding does not (normally) happen. Other definitions may focus on similarity of DNA or morphology. Some of cephalopods have been identified. Two important extinct taxa A taxon is a group of (one or more) organisms, which a taxonomist adjudges to be a unit. Usually a taxon is given a name and a rank, although neither is a requirement. Defining what belongs or does not belong to such a taxonomic group is done by a taxonomist. It is not uncommon for one taxonomist to disagree with another on what exactly belongs to are Ammonoidea, the ammonites Ammonites, as they pertain specifically to the order Ammonitida, are an extinct group of marine animals belonging to the cephalopod subclass Ammonoidea. They are excellent index fossils, and it is often possible to link the rock layer in which they are found to specific geological time periods, and Belemnoidea Belemnites are an extinct group of marine cephalopod, very similar in many ways to the modern squid and closely related[citation needed] to the modern cuttlefish. Like them, the belemnites possessed an ink sac, but, unlike the squid, they possessed ten arms of roughly equal length, and no tentacles. The name "Belemnoid" comes from the, the belemnites.
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Order one and the squidsmith flattens a cephalopod with a small hand-cranked laundry wringer. The result: a snack that looks like a fruit-roll up but tastes ...
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Height 6 1 2 Approximate Weight 1 9 16 lb s Price $ 28 00 FO0135 Cephalopod Sinoceras sp Cephalopod Sinoceras sp a scrolled animal fossil Location China Age Mid Ordovician $ Sold Below
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Wed, 16 Dec 2009 01:50:00 GM
--- Forwarded message --- From: Geoff Olson . Date: Tue, Dec 15, 2009 at 5:44 PM Subject: Go, team . Cephalopod. ! To: Tool use found in Octopuses. (sic). After years of surprising scientists with their ...
