Decapodiformes is a Scientific classification or biological classification refers to how biologists group and categorize extinct and living species of organisms. Modern classification has its roots in the system of Carolus Linnaeus, who grouped species according to shared physical characteristics. These groupings have been revised since Linnaeus to improve consistency with the Darwinian... superorder of Orders Sepiida Sepiolida Spirulida Teuthida Octopoda Vampyromorphida Nautilida The Cephalopods (head-foot) are the mollusc class Cephalopoda characterized by bilateral body symmetry, a prominent head, and a modification of the mollusc foot into the form of arms or tentacles. Teuthology is the study of cephalopods, and teuthologists are the scientists... Cephalopoda, which includes all species with ten limbs; the name derives from the Latin was the language originally spoken in the region around Rome called Latium. It gained great importance as the formal language of the Roman Empire. All Romance languages are descended from Latin, and many words based on Latin are found in other modern languages such as English. It is said... Latin meaning ten feet. The ten limbs are divided into 8 arms and 2 Tentacles can refer to the elongated flexible organs that are present in many invertebrates, and sometimes to the hairs of the leaves of insectivorous plants. Generally tentacles are mostly used for feeding and grasping. Tentacles in marine animals The phylum mollusca includes many species with tentacles. Octopuses do not have... tentacles. It is presumed that an ancestral coleoid had five identical pairs of limbs, and that one branch evolved a modified arm pair IV and became the Decapodiformes species. Another branch evolved and then eventually lost its arm pair II, becoming the Octopodiformes.

The superorder of Decapodiformes includes:

• Order Binomial name Spirula spirula (Linnaeus, 1758) Rams Horn Squid (Spirula spirula) is a unique and peculiar species of mollusc which constitutes a family (Spirulidae) and order (Spirulida) by itself. Live specimens are very rare because they are deep dwellers. It is also known as Little Post Horn Squid or... Spirulida: Ram's Horn Squid
• Order Families Sepiadariidae Sepiidae Cuttlefish are animals of the order Sepiida, and are marine cephalopods, small relatives of squids and nautilus. Cuttlefish have an internal shell, large eyes, and ten arms furnished with denticulated suckers, by means of which it secures its prey. The name is sometimes applied to dibranchiate cephalopods... Sepiida: cuttlefish
• Order Families Idiosepiidae Sepiolidae Classification CLASS CEPHALOPODA Subclass Nautiloidea: nautilus Subclass Coleoidea: squid, octopus, cuttlefish Superorder Decapodiformes Order Spirulida: Rams Horn Squid Order Sepiida: cuttlefish Order Sepiolida: bobtail squid Family Idiosepiidae Family Sepiolidae Order Teuthida: squid Superorder Octopodiformes Categories: Animal stubs | Bobtail squid ... Sepiolida: pygmy, bobtail and bottletail squid
• Order Suborders Myopsina Oegopsina Squids are the large, diverse group of marine mollusks, popular as food in cuisines as widely separated as the Japanese and the Italian. In fish markets and restaurants in English-speaking countries, it is often known by the name calamari, from the Italian word for these animals... Teuthida: squid