Decapodiformes
Encyclopedia
Decapodiformes is a superorder of Cephalopoda, which includes all species with ten limbs; the name derives from the Greek
word meaning ten feet. The ten limbs are divided into 8 short arms and 2 long tentacle
s. 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:
Greek language
Greek is an independent branch of the Indo-European family of languages. Native to the southern Balkans, it has the longest documented history of any Indo-European language, spanning 34 centuries of written records. Its writing system has been the Greek alphabet for the majority of its history;...
word meaning ten feet. The ten limbs are divided into 8 short arms and 2 long tentacle
Tentacle
A tentacle or bothrium is one of usually two or more elongated flexible organs present in animals, especially invertebrates. The term may also refer to the hairs of the leaves of some insectivorous plants. Usually, tentacles are used for feeding, feeling and grasping. Anatomically, they work like...
s. 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
Octopodiformes
Octopodiformes is a superorder of the subclass Coleoidea. It comprises the octopuses and the vampire squid. All members of Octopodiformes have 8 arms.-Classification:*Class Cephalopoda**Subclass Nautiloidea: nautilus**Subclass †Ammonoidea: ammonites...
.
The superorder of Decapodiformes includes:
- ?Order †BoletzkyidaBoletzkyidaThe Boletzkyda are perhaps the very earliest of the teuthid coleoid cephalopods, which seem to form a link between nautiloid orthocerids and more advanced coleoids. The Beletzkyda was named and described by Bandel, Reitner, and Sturmer in 1983 from specimens found the Lower Devonian black slate...
- Order SpirulidaSpirulidaSpirulida is an order of cephalopods comprising one extant species and several extinct taxa.-Classification:*Order Spirulida**?Family Shimanskyidae**Suborder †Groenlandibelina***Family †Groenlandibelidae...
: Ram's Horn Squid - Order Sepiida: cuttlefish
- Order Sepiolida: pygmy, bobtail and bottletail squid
- Order Teuthida: squid