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Bathyporeia Elegans
''Bathyporeia elegans'' is a species of amphipod crustacean in the genus '' Bathyporeia'' which occurs in the northeastern Atlantic Ocean. It is unpigmented, and grows up to long. Description ''Bathyporeia elegans'' is a translucent, laterally-flattened sand-digger shrimp up to long. The head bears two pairs of antennae, four pairs of feeding appendages and a pair of large red eyes. The basal segments of the first pair of antennae are rectangular with feather-like chaetae on the ventral surface; several smaller segments extend from the base forming a zigzag, and the antenna is tipped by a flagellum, with five to six segments in females and nine to eleven segments in males. The second pair of antennae have five segments and in females, are tipped by an eight to ten-segmented flagellum, and are twice as long as the first pair. In males, the second pair of antennae have filiform flagella which extend the whole length of the body. Distribution and habitat ''Bathyporeia elegans'' o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Brood Pouch (Peracarida)
The marsupium or brood pouch, is a characteristic feature of Peracarida, including the orders Amphipoda, Isopoda, Cladocera, and Cumacea. It is an egg chamber formed by oostegites, which are appendages that are attached to the coxae (first segment) of the first pereiopods. Females lay their eggs directly into the brood chamber, and the young will develop there, undergoing several moults before emerging as miniature adults referred to as mancae. Males have no marsupium. References {{malacostraca-stub Crustacean anatomy ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amphipoda
Amphipoda is an order of malacostracan crustaceans with no carapace and generally with laterally compressed bodies. Amphipods range in size from and are mostly detritivores or scavengers. There are more than 9,900 amphipod species so far described. They are mostly marine animals, but are found in almost all aquatic environments. Some 1,900 species live in fresh water, and the order also includes the terrestrial sandhoppers such as ''Talitrus saltator''. Etymology and names The name ''Amphipoda'' comes, via New Latin ', from the Greek roots 'on both/all sides' and 'foot'. This contrasts with the related Isopoda, which have a single kind of thoracic leg. Particularly among anglers, amphipods are known as ''freshwater shrimp'', ''scuds'', or ''sideswimmers''. Description Anatomy The body of an amphipod is divided into 13 segments, which can be grouped into a head, a thorax and an abdomen. The head is fused to the thorax, and bears two pairs of antennae and one pair of s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Crustacean
Crustaceans (Crustacea, ) form a large, diverse arthropod taxon which includes such animals as decapods, seed shrimp, branchiopods, fish lice, krill, remipedes, isopods, barnacles, copepods, amphipods and mantis shrimp. The crustacean group can be treated as a subphylum under the clade Mandibulata. It is now well accepted that the hexapods emerged deep in the Crustacean group, with the completed group referred to as Pancrustacea. Some crustaceans (Remipedia, Cephalocarida, Branchiopoda) are more closely related to insects and the other hexapods than they are to certain other crustaceans. The 67,000 described species range in size from '' Stygotantulus stocki'' at , to the Japanese spider crab with a leg span of up to and a mass of . Like other arthropods, crustaceans have an exoskeleton, which they moult to grow. They are distinguished from other groups of arthropods, such as insects, myriapods and chelicerates, by the possession of biramous (two-parted) limbs, and by th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bathyporeia
''Bathyporeia'' is a genus of amphipods in the family Pontoporeiidae, containing the following species: *'' Bathyporeia borgi'' d'Udekem d'Acoz & Vader, 2005 *'' Bathyporeia chevreuxi'' d'Udekem d'Acoz & Vader, 2005 *'' Bathyporeia cunctator'' d'Udekem d'Acoz & Vader, 2005 *''Bathyporeia elegans'' Watkin, 1938 *'' Bathyporeia elkaimi'' d'Udekem d'Acoz & Menioui, 2004 *'' Bathyporeia gladiura'' d'Udekem d'Acoz & Vader, 2005 *'' Bathyporeia gracilis'' Sars, 1891 *'' Bathyporeia griffithsi'' d'Udekem d'Acoz & Vader, 2005 *''Bathyporeia guilliamsoniana'' (Bate, 1857) *'' Bathyporeia ledoyeri'' d'Udekem d'Acoz & Menioui, 2004 *'' Bathyporeia leucophthalma'' Bellan-Santini, 1973 *''Bathyporeia lindstromi'' Stebbing, 1906 *'' Bathyporeia megalops'' Chevreux, 1911 *'' Bathyporeia microceras'' d'Udekem d'Acoz & Menioui, 2004 *'' Bathyporeia nana'' Toulmond, 1966 *''Bathyporeia parkeri'' Bousfield, 1973 *''Bathyporeia pelagica'' (Bate, 1856) *''Bathyporeia phaiophthalma'' Bellan-Santini, 1 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
World Register Of Marine Species
The World Register of Marine Species (WoRMS) is a taxonomic database that aims to provide an authoritative and comprehensive list of names of marine organisms. Content The content of the registry is edited and maintained by scientific specialists on each group of organism. These taxonomists control the quality of the information, which is gathered from the primary scientific literature as well as from some external regional and taxon-specific databases. WoRMS maintains valid names of all marine organisms, but also provides information on synonyms and invalid names. It is an ongoing task to maintain the registry, since new species are constantly being discovered and described by scientists; in addition, the nomenclature and taxonomy of existing species is often corrected or changed as new research is constantly being published. Subsets of WoRMS content are made available, and can have separate badging and their own home/launch pages, as "subregisters", such as the ''World List of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chaeta
A chaeta or cheta (from Greek χαίτη “crest, mane, flowing hair"; plural: chaetae) is a chitinous bristle or seta found in annelid worms, (although the term is also frequently used to describe similar structures in other invertebrates such as arthropods). Polychaete annelids, ('polychaeta' literally meaning "many bristles") are named for their chaetae. In Polychaeta, chaetae are found as bundles on the parapodia, paired appendages on the side of the body. The chaetae are epidermal extracellular structures, and clearly visible in most polychaetes. They are probably the best studied structures in these animals. Use in taxonomy and identification The ultrastructure of chaetae is fundamentally similar for all taxa but there is vast diversity in chaetal morphology. Moreover, chaetae bear precise characters for determination of species and taxonomic assessment. The shape, absolute and relative size, number, position, ornamentation and type are important taxonomic characters a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Flagellum
A flagellum (; ) is a hairlike appendage that protrudes from certain plant and animal sperm cells, and from a wide range of microorganisms to provide motility. Many protists with flagella are termed as flagellates. A microorganism may have from one to many flagella. A gram-negative bacterium ''Helicobacter pylori'' for example uses its multiple flagella to propel itself through the mucus lining to reach the stomach epithelium, where it may cause a gastric ulcer to develop. In some bacteria the flagellum can also function as a sensory organelle, being sensitive to wetness outside the cell. Across the three domains of Bacteria, Archaea, and Eukaryota the flagellum has a different structure, protein composition, and mechanism of propulsion but shares the same function of providing motility. The Latin word means " whip" to describe its lash-like swimming motion. The flagellum in archaea is called the archaellum to note its difference from the bacterial flagellum. Eukaryotic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Abra Prismatica
''Abra prismatica'' is a species of bivalve mollusc in the family Semelidae. It occurs in the northeastern Atlantic Ocean, the North Sea and the Mediterranean Sea, where it lives on the seabed, in shallow areas buried in soft sediment. Description ''Abra prismatica'' grows to a length of about . Each shell valve is fine and brittle, about twice as long as it is wide and oval or fusiform. It is sculptured with fine concentric lines, the chondrophore (pit to which the internal ligament is attached) points to the posterior. On the right valve are two small cardinal teeth in front of the chondrophore, and a single anterior and single posterior lateral teeth behind it. On the left valve there is a single small cardinal tooth and two small anterior and posterior laterals. The valves are shiny white both inside and out. Distribution ''Abra prismatica'' is found on the coasts of northwest Europe, the North Sea and the Mediterranean Sea at depths down to about . It is common around the Br ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polychaete
Polychaeta () is a paraphyletic class (biology), class of generally marine invertebrate, marine annelid worms, common name, commonly called bristle worms or polychaetes (). Each body segment has a pair of fleshy protrusions called parapodia that bear many bristles, called chaetae, which are made of chitin. More than 10,000 species are described in this class. Common representatives include the lugworm (''Arenicola marina'') and the Alitta virens, sandworm or Alitta succinea, clam worm ''Alitta''. Polychaetes as a class are robust and widespread, with species that live in the coldest ocean temperatures of the abyssal plain, to forms which tolerate the extremely high temperatures near hydrothermal vents. Polychaetes occur throughout the Earth's oceans at all depths, from forms that live as plankton near the surface, to a 2- to 3-cm specimen (still unclassified) observed by the robot ocean probe Nereus (underwater vehicle), ''Nereus'' at the bottom of the Challenger Deep, the deepes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amphiura Filiformis
''Amphiura filiformis'' is a species of brittle star belonging to the family Amphiuridae. It is found on the seabed in the north east Atlantic Ocean and adjoining seas to a depth of . It digs itself a shallow burrow in the sand and waves its arms in the water above to suspension feed on plankton. Description ''Amphiura filiformis'' has a central disc up to in diameter and five slender arms up to long. The aboral (upper) side of the disc is covered in fine scales but there are none on the oral (under side). The general colour of this brittle star is greyish or reddish-brown and it is bioluminescent, emitting a bluish light. Distribution and habitat ''Amphiura filiformis'' is found in the north east Atlantic Ocean, the North Sea, the Irish Sea, the Mediterranean Sea and the Adriatic Sea at depths between . It lives on sand and muddy-sand bottoms into which it burrows to a depth of about . Biology ''Amphiura filiformis'' lives submerged in soft substrate with part of its arms p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cumacea
Cumacea is an order of small marine crustaceans of the superorder Peracarida, occasionally called hooded shrimp or comma shrimp. Their unique appearance and uniform body plan makes them easy to distinguish from other crustaceans. They live in soft-bottoms such as mud and sand, mostly in the marine environment. There are more than 1,500 species of cumaceans formally described. The species diversity of Cumacea increases with depth. Anatomy Cumaceans have a strongly enlarged cephalothorax with a carapace, a slim abdomen, and a forked tail. The length of most species varies from . The carapace of a typical cumacean is composed of several fused dorsal head parts and the first three somites of the thorax. This carapace encloses the appendages that serve for respiration and feeding. In most species, there are two eyes at the front side of the head shield, often merged into a single dorsal eye lobe. The five posterior somites of the thorax form the pereon. The pleon (abdomen) consists ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eudorellopsis Deformis
''Eudorellopsis'' is a genus of hooded shrimps within the family Leuconidae. There are currently 9 species assigned to the genus. Species * ''Eudorellopsis biplicata'' * ''Eudorellopsis deformis'' * ''Eudorellopsis derzhavini'' * ''Eudorellopsis integra'' * ''Eudorellopsis leuconi'' * ''Eudorellopsis longirostris'' * ''Eudorellopsis mykteros'' * ''Eudorellopsis resima ''Eudorellopsis'' is a genus of hooded shrimps within the family Leuconidae. There are currently 9 species assigned to the genus. Species * ''Eudorellopsis biplicata'' * ''Eudorellopsis deformis'' * '' Eudorellopsis derzhavini'' * ''Eudo ...'' * '' Eudorellopsis uschakovi'' References {{Taxonbar, from=Q6500234 Cumacea Malacostraca genera ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
