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Rossia Macrosoma
''Rossia'' is a genus of 10 species of benthic bobtail squid in the family Sepioidae found in all oceans. They live at depths greater than 50 m (164 ft) and can grow up to 9 cm (3.5 in.) in mantle length. This genus was first discovered in 1832 by Sir John Ross and his nephew James Clark Ross in the Arctic Seas, showing a resemblance to another genus under the same family, ''Sepiola.'' After returning from their expedition, Sir Richard Owen officially classified ''Rossia'' to be a new genus, naming it after Sir John and James Clark Ross. Description ''Rossia'' are categorized under the subfamily Rossiinae, which are identified by their short mantles and lack of ventral shield due to the unextended anterior ventral edge of the mantle. ''Rossia'' are distinguished by their dome-shaped mantles. which are not fused to their head. They are shorter in length compared to many other bobtail squid, with mantle length varying from 1.4 cm (0.5 in) to 9 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rossia Glaucopis
''Rossia glaucopis'' is a species of bobtail squid native to the southeastern Pacific Ocean, specifically the waters around Chile.Reid, A. & P. Jereb 2005. Family Sepiolidae. ''In:'' P. Jereb & C.F.E. Roper, eds. ''Cephalopods of the world. An annotated and illustrated catalogue of species known to date. Volume 1. Chambered nautiluses and sepioids (Nautilidae, Sepiidae, Sepiolidae, Sepiadariidae, Idiosepiidae and Spirulidae)''. FAO Species Catalogue for Fishery Purposes. No. 4, Vol. 1. Rome, FAO. pp. 153–203. The type specimen was collected off Chile. The type repository Type may refer to: Science and technology Computing * Typing, producing text via a keyboard, typewriter, etc. * Data type, collection of values used for computations. * File type * TYPE (DOS command), a command to display contents of a file. * Typ ... is unknown. File:Rossia glaucopis embryo.jpg, Embryo in egg File:Rossia glaucopis mouth.jpg, Head and limbs File:Rossia glaucopis1.jpg, Lateral view of male ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rossia Bullisi
''Rossia bullisi'', also known as the Gulf bobtail squid, is a species of bobtail squid native to the tropical western Atlantic Ocean, specifically the northern Gulf of Mexico and Straits of Florida.Reid, A. & P. Jereb 2005. Family Sepiolidae. ''In:'' P. Jereb & C.F.E. Roper, eds. ''Cephalopods of the world. An annotated and illustrated catalogue of species known to date. Volume 1. Chambered nautiluses and sepioids (Nautilidae, Sepiidae, Sepiolidae, Sepiadariidae, Idiosepiidae and Spirulidae)''. FAO Species Catalogue for Fishery Purposes. No. 4, Vol. 1. Rome, FAO. pp. 153–203. ''R. bullisi'' grows to 45 mm in mantle length. The type specimen was collected in the Gulf of Mexico and is deposited at the National Museum of Natural History in Washington, D.C. ) , image_skyline = , image_caption = Clockwise from top left: the Washington Monument and Lincoln Memorial on the National Mall, United States Capitol, Logan Circle, Jefferson Memorial, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Egg Case (Chondrichthyes)
An egg case or egg capsule, often colloquially called a mermaid's purse, is the casing that surrounds the eggs of oviparous sharks, skates and chimaeras. Egg cases typically contain one embryo, except for big skate and mottled skate egg cases, which contain up to 7 embryos. Oviparity is completely absent in the superorder Squalomorphii. Description Egg cases are made of collagen protein strands, and are often described as feeling rough and leathery. Some egg cases have a fibrous material covering the outside of the egg case, thought to aid in attachment to substrate. Egg cases without a fibrous outer layer can be striated, bumpy, or smooth and glossy. With the exception of bullhead shark eggs, egg cases are typically rectangular in shape with projections, called horns, at each corner. Depending on the species, egg cases may have one or more tendrils. Development Shortly after internal fertilization, the fertilized ovum enters the partially formed egg case located in th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mantle Cavity
The mantle (also known by the Latin word pallium meaning mantle, robe or cloak, adjective pallial) is a significant part of the anatomy of molluscs: it is the dorsal body wall which covers the visceral mass and usually protrudes in the form of flaps well beyond the visceral mass itself. In many species of molluscs the epidermis of the mantle secretes calcium carbonate and conchiolin, and creates a shell. In sea slugs there is a progressive loss of the shell and the mantle becomes the dorsal surface of the animal. The words mantle and pallium both originally meant cloak or cape, see mantle (vesture). This anatomical structure in molluscs often resembles a cloak because in many groups the edges of the mantle, usually referred to as the ''mantle margin'', extend far beyond the main part of the body, forming flaps, double-layered structures which have been adapted for many different uses, including for example, the siphon. Mantle cavity The ''mantle cavity'' is a central ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hectocotylus
A hectocotylus (plural: ''hectocotyli'') is one of the arms of male cephalopod 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, ...s that is specialized to store and transfer spermatophores to the female. Structurally, hectocotyli are muscular hydrostats. Depending on the species, the male may use it merely as a conduit to the female, analogously to a penis in other animals, or he may Autotomy, wrench it off and present it to the female. The hectocotyl arm was first described in Aristotle's biology, Aristotle's biological works. Although Aristotle knew of its use in mating, he was doubtful that a tentacle could deliver sperm. The name ''hectocotylus'' was devised by Georges Cuvier, who first found one embedded in the mantle of a female Argonaut (animal), argonaut. Supposing it to be ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cephalopod
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 i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Prawn
Prawn is a common name for small aquatic crustaceans with an exoskeleton and ten legs (which is a member of the order decapoda), some of which can be eaten. The term "prawn"Mortenson, Philip B (2010''This is not a weasel: a close look at nature's most confusing terms''Pages 106–109, John Wiley & Sons. . is used particularly in the United Kingdom, Ireland, and Commonwealth nations, for large swimming crustaceans or shrimp, especially those with commercial significance in the fishing industry. Shrimp that are present in this category often belong to the suborder Dendrobranchiata. In North America, the term is used less frequently, typically for freshwater shrimp. The terms shrimp and prawn themselves lack scientific standing. Over the years, the way they are used has changed, and in contemporary usage the terms are almost interchangeable. Shrimp'' vs. ''prawn Regional distinctions The terms shrimp and prawn originated in Britain. In the use of common names for species, shrim ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shrimp
Shrimp are crustaceans (a form of shellfish) with elongated bodies and a primarily swimming mode of locomotion – most commonly Caridea and Dendrobranchiata of the decapod order, although some crustaceans outside of this order are referred to as "shrimp". More narrow definitions may be restricted to Caridea, to smaller species of either group or to only the marine species. Under a broader definition, ''shrimp'' may be synonymous with prawn, covering stalk-eyed swimming crustaceans with long, narrow muscular tails ( abdomens), long whiskers ( antennae), and slender legs. Any small crustacean which resembles a shrimp tends to be called one. They swim forward by paddling with swimmerets on the underside of their abdomens, although their escape response is typically repeated flicks with the tail driving them backwards very quickly. Crabs and lobsters have strong walking legs, whereas shrimp have thin, fragile legs which they use primarily for perching.Rudloe & Rudloe (20 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rossia Tortugaensis
''Rossia'' is a genus of 10 species of benthic bobtail squid in the family Sepioidae found in all oceans. They live at depths greater than 50 m (164 ft) and can grow up to 9 cm (3.5 in.) in mantle length. This genus was first discovered in 1832 by Sir John Ross and his nephew James Clark Ross in the Arctic Seas, showing a resemblance to another genus under the same family, ''Sepiola.'' After returning from their expedition, Sir Richard Owen officially classified ''Rossia'' to be a new genus, naming it after Sir John and James Clark Ross. Description ''Rossia'' are categorized under the subfamily Rossiinae, which are identified by their short mantles and lack of ventral shield due to the unextended anterior ventral edge of the mantle. ''Rossia'' are distinguished by their dome-shaped mantles. which are not fused to their head. They are shorter in length compared to many other bobtail squid, with mantle length varying from 1.4 cm (0.5 in) to 9&nbs ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rossia Palpebrosa
''Rossia palpebrosa'', also known as the warty bobtail squid, is a species of bobtail squid native to the northern Atlantic Ocean. The type locality is simply given as "Arctic Regions". The type specimen is deposited at The Natural History Museum in London, although the location given for the type specimen has not been recently confirmed. Description ''R. palpebrosa'' is a small squid growing to approximately in mantle length. The mantle is rounded posteriorly and not fused with the head dorsally. The head is wide, and it and mantle are covered in tubercles which are often large and widely distributed but, in juveniles and as a local variant, they are small and not easily observable. The mantle cavity is divided by a muscular septum. The fins are kidney-shaped and set obliquely. There is often a luminous organ on the ink sac. The tentacles are retractable and have straight, clearly defined clubs. The suckers on the clubs are arranged in about eight rows and are all much the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rossia Pacifica
''Rossia pacifica'', also known as the stubby squid, is a species of bobtail squid native to the northern Pacific Ocean. It usually occurs in winter on sandy slopes away from strong currents in moderately shallow water. In summer it moves to deeper water where it breeds. The female cements the egg capsules under a stone or in some other concealed location, and both male and female die soon after breeding. Subspecies Two subspecies are recognised: - * '' Rossia pacifica diegensis'' Berry, 1911 * '' Rossia pacifica pacifica'' Berry, 1911 Description The stubby squid is a small species growing to a maximum mantle length of about and a total length of , with females being larger than males. The head bears eight short arms, a pair of retractable tentacles and two large eyes. The first pair of arms is shorter than the others and the third pair the longest. The arms are circular in cross-section and each bears up to four rows of suckers on the middle section and two rows elsewhere. T ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rossia Mollicella
''Rossia mollicella'' is a species of bobtail squid native to the western Pacific Ocean, south from Sendai Bay, Japan. It occurs on the outer continental shelf and in the upper bathyal zone. ''R. mollicella'' lives at depths from 729 to 805 m.Reid, A. & P. Jereb 2005. Family Sepiolidae. ''In:'' P. Jereb & C.F.E. Roper, eds. ''Cephalopods of the world. An annotated and illustrated catalogue of species known to date. Volume 1. Chambered nautiluses and sepioids (Nautilidae, Sepiidae, Sepiolidae, Sepiadariidae, Idiosepiidae and Spirulidae)''. FAO Species Catalogue for Fishery Purposes. No. 4, Vol. 1. Rome, FAO. pp. 153–203. ''R. mollicella'' grows to approximately 36 mm or 40 mmOkutani, T. 1995. ''Cuttlefish and squids of the world in color''. Publication for the 30th anniversary of the foundation of the National Cooperative Association of Squid Processors. in mantle length. The type specimen was collected off Wakayama Prefecture, Japan. It is deposited at the National M ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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