|
Inopinoteuthis Magna
''Cirrothauma magna'', also known as the big-eye jellyhead, is a species of deep-sea cirrate octopus that has been found in the Indian, Atlantic, and Pacific oceans. It is known from four damaged specimens. The species was originally described in genus ''Cirroteuthis'', and was later allocated to ''Cirrothauma'' since its shell and elongate arms are similar to those of ''Cirrothauma murrayi ''Cirrothauma murrayi'', the blind cirrate octopus, is a presumably blind octopus whose eyes can likely sense light, but not form images. It has been found worldwide, usually beneath the ocean's surface, but a single specimen was collected in the ...''. More recently the species (along with ''I. hoylei'') has been allocated to a separate genus (''Inopinoteuthis'') given that these species differ rather strongly from ''Cirrothauma'' in having functional eyes (vs. vestigial eyes in ''C. murrayi'') and differ greatly in sucker form. ''Cirrothauma magna'' is likely the largest species of cirra ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
William Evans Hoyle
Dr William Evans Hoyle FRSE (28 January 1855 – 7 February 1926) was a British zoologist. A specialist in deep sea creatures, he worked on classification and illustrations from the Challenger expedition, ''Challenger'' expedition from 1882 to 1888. Life Hoyle was born in Manchester, the son of William Jennings Hoyle, an engraver. He was educated at Owens College and at Exeter College, Oxford, Exeter College and Christ Church, Oxford where he obtained a Bachelor of Arts in 1877, Master of Arts in 1882 and a Doctor of Science, he was also Member of the Royal College of Surgeons. He was the Director of the Manchester Museum from 1889 to 1909 and then was the first director of the National Museum of Wales from 1909 up to his retirement in 1926. Trained as a medical anatomist, Hoyle is most famous for his monographic studies on cephalopods from major exploring expeditions of his era including the ''Challenger expedition, Challenger'', the ''USS Albatross (1882), Albatross'', th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cirrina
Cirrina or Cirrata is a suborder and one of the two main divisions of octopuses. Cirrate octopuses have a small, internal shell and two fins on their head, while their sister suborder Incirrina has neither. The fins of cirrate octopods are associated with a unique cartilage-like shell in a shell sac. In cross-section, the fins have distinct proximal and distal regions, both of which are covered by a thin surface sheath of muscle. The suborder is named for small, cilia-like strands (cirri) on the arms of the octopus, a pair for each sucker. These are thought to play some role in feeding, perhaps by creating currents of water that help bring food closer to the beak. Cirrate octopuses are noteworthy for lacking ink sacs, having reduced or absent radula, and reduced gills. The oldest known member of the group is '' Paleocirroteuthis'' from the Late Cretaceous of Japan and Canada. There is not much data about cirrate octopods due to their fragility, making them particularly pro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cirrate Shell
Cirrate octopuses possess a well-developed internal shell that supports their muscular swimming fins. This is in contrast to the more familiar, finless, incirrate octopuses, in which the shell remnant is either present as a pair of stylets or absent altogether. The cirrate shell is quite unlike that of any other living cephalopod group and has its own dedicated set of descriptive terms. It is usually roughly arch- or saddle-shaped and is rather soft, being similar in consistency to cartilage. Each of the eight extant cirrate genera is characterised by a distinct shell morphology outlined below (below taxonomy updated per WoRMS): *Superfamily Cirroteuthoidea ** Cirroteuthidae ***'' Cirroteuthis'' — saddle-shaped, with large wings ***'' Cirrothauma'' — butterfly-shaped ** Stauroteuthidae ***'' Stauroteuthis'' — U-shaped *Superfamily Opisthoteuthoidea ** Opisthoteuthidae ***'' Opisthoteuthis'' (also '' Exsuperoteuthis'' & '' Insigniteuthis'')— U-shaped, lateral wings usu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cirrothauma Murrayi
''Cirrothauma murrayi'', the blind cirrate octopus, is a presumably blind octopus whose eyes can likely sense light, but not form images. It has been found worldwide, usually beneath the ocean's surface, but a single specimen was collected in the Arctic immediately below the sea ice. Like other cirrates, it has an internal shell, muscular fins for swimming, and a web connecting the arms. The species was first caught by an expedition led by Sir John Murray in 1910, and it was later named in honor of Murray. It was described by German marine biologist Carl Chun in 1911. The diet of this species is unknown, but like other cirrate octopods, the buccal mass, esophagus, and stomach of ''Cirrothauma murrayi'' suggest whole (but very small) organisms, especially small crustacean Crustaceans (from Latin meaning: "those with shells" or "crusted ones") are invertebrate animals that constitute one group of arthropods that are traditionally a part of the subphylum Crustacea (), a large, d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Octopuses
An octopus (: octopuses or octopodes) is a soft-bodied, eight-limbed Mollusca, mollusc of the order (biology), order Octopoda (, ). The order consists of some 300 species and is grouped within the class Cephalopoda with squids, cuttlefish, and nautiloids. Like other cephalopods, an octopus is symmetry in biology, bilaterally symmetric with two eyes and a cephalopod beak, beaked mouth at the centre point of the eight limbs. An octopus can radically deform its shape, enabling it to squeeze through small gaps. They trail their appendages behind them as they swim. The Siphon (mollusc), siphon is used for aquatic respiration, respiration and aquatic locomotion, locomotion (by jet propulsion#Jet-propelled animals, water jet propulsion). Octopuses have a complex nervous system and excellent sight, and are among the most intelligent and behaviourally diverse invertebrates. Octopuses inhabit various ocean habitats, including coral reefs, pelagic waters, and the seabed; some live in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Molluscs Of New Zealand
Mollusca is a phylum of protostomic invertebrate animals, whose members are known as molluscs or mollusks (). Around 76,000 extant species of molluscs are recognized, making it the second-largest animal phylum after Arthropoda. The number of additional fossil species is estimated between 60,000 and 100,000, and the proportion of undescribed species is very high. Many taxa remain poorly studied. Molluscs are the largest marine phylum, comprising about 23% of all the named marine organisms. They are highly diverse, not just in size and anatomical structure, but also in behaviour and habitat, as numerous groups are freshwater and even terrestrial species. The phylum is typically divided into 7 or 8 taxonomic classes, of which two are entirely extinct. Cephalopod molluscs, such as squid, cuttlefish, and octopuses, are among the most neurologically advanced of all invertebrates—and either the giant squid or the colossal squid is the largest known extant invertebrate spe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cephalopods Described In 1885
A cephalopod is any member of the molluscan class Cephalopoda (Greek plural , ; "head-feet") such as a squid, octopus, cuttlefish, or nautilus. These exclusively marine animals are characterized by bilateral body symmetry, a prominent head, and a set of arms or tentacles (muscular hydrostats) modified from the primitive molluscan foot. Fishers sometimes call cephalopods "inkfish", referring to their common ability to squirt ink. The study of cephalopods is a branch of malacology known as teuthology. Cephalopods became dominant during the Ordovician period, represented by primitive nautiloids. The class now contains two, only distantly related, extant subclasses: Coleoidea, which includes octopuses, squid, and cuttlefish; and Nautiloidea, represented by ''Nautilus'' and ''Allonautilus''. In the Coleoidea, the molluscan shell has been internalized or is absent, whereas in the Nautiloidea, the external shell remains. About 800 living species of cephalopods have been identified. Tw ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
