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Cucumaria Vegae
''Cucumaria vegae'', also known as tiny black sea cucumber or northern tar spot, is a species of sea cucumber. It was first described to science by Johan Hjalmar Théel in 1886 reporting on the sea cucumber specimens brought back by the ''Challenger'' expedition. Among these was the type specimen for this species, which was collected at Bering Island. Description As one might expect, the tiny black sea cucumber is small, growing to a length of . It is black above and a somewhat lighter gray on its underside. When feeding, the animal extends eight equally long, finely branched, or dendritic, tentacles, and two shorter ones. These shorter tentacles are on the animal's ventral, or bottom side. When disturbed it retracts these delicate structures into its body. There are five double rows of podia, or tube feet that run the length of the body. Those or the dorsal, upper, side of the sea cucumber are less distinct. Like the tentacles, the tube feet retract when the animal ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cucumaria Vegae
''Cucumaria vegae'', also known as tiny black sea cucumber or northern tar spot, is a species of sea cucumber. It was first described to science by Johan Hjalmar Théel in 1886 reporting on the sea cucumber specimens brought back by the ''Challenger'' expedition. Among these was the type specimen for this species, which was collected at Bering Island. Description As one might expect, the tiny black sea cucumber is small, growing to a length of . It is black above and a somewhat lighter gray on its underside. When feeding, the animal extends eight equally long, finely branched, or dendritic, tentacles, and two shorter ones. These shorter tentacles are on the animal's ventral, or bottom side. When disturbed it retracts these delicate structures into its body. There are five double rows of podia, or tube feet that run the length of the body. Those or the dorsal, upper, side of the sea cucumber are less distinct. Like the tentacles, the tube feet retract when the animal ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Species
In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of the appropriate sexes or mating types can produce fertile offspring, typically by sexual reproduction. Other ways of defining species include their karyotype, DNA sequence, morphology, behaviour or ecological niche. In addition, paleontologists use the concept of the chronospecies since fossil reproduction cannot be examined. The most recent rigorous estimate for the total number of species of eukaryotes is between 8 and 8.7 million. However, only about 14% of these had been described by 2011. All species (except viruses) are given a two-part name, a "binomial". The first part of a binomial is the genus to which the species belongs. The second part is called the specific name or the specific epithet (in botanical nomenclature, also sometimes i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Haida Gwaii
Haida Gwaii (; hai, X̱aaydag̱a Gwaay.yaay / , literally "Islands of the Haida people") is an archipelago located between off the northern Pacific coast of Canada. The islands are separated from the mainland to the east by the shallow Hecate Strait. Queen Charlotte Sound lies to the south, with Vancouver Island beyond. To the north, the disputed Dixon Entrance separates Haida Gwaii from the Alexander Archipelago in the U.S. state of Alaska. Haida Gwaii consists of two main islands: Graham Island () in the north and Moresby Island (, literally: south people island half, or "Islands of Beauty") in the south, along with approximately 400 smaller islands with a total landmass of . Other major islands include Anthony Island ( / ), Burnaby Island (), Lyell Island, Louise Island, Alder Island ( / ), and Kunghit Island. (For a fuller, but still incomplete, list see List of islands of British Columbia.) Part of the Canadian province of British Columbia, the islands were known f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Animals Described In 1886
Animals are multicellular, eukaryotic organisms in the biological kingdom Animalia. With few exceptions, animals consume organic material, breathe oxygen, are able to move, can reproduce sexually, and go through an ontogenetic stage in which their body consists of a hollow sphere of cells, the blastula, during embryonic development. Over 1.5 million living animal species have been described—of which around 1 million are insects—but it has been estimated there are over 7 million animal species in total. Animals range in length from to . They have complex interactions with each other and their environments, forming intricate food webs. The scientific study of animals is known as zoology. Most living animal species are in Bilateria, a clade whose members have a bilaterally symmetric body plan. The Bilateria include the protostomes, containing animals such as nematodes, arthropods, flatworms, annelids and molluscs, and the deuterostomes, containing the echinoderms and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cucumariidae
Cucumariidae is a family of sea cucumbers, marine animals with elongated bodies, leathery skins and tentacles that are found on the sea bed. Description Members of the family Cucumariidae are small to medium-sized sea cucumbers, characterised by ten branching tentacles of which the lowest two are often smaller than the others. They are filter feeders, using their tentacles to catch micro-organisms and pass them to their mouth. They are seldom found on coral reefs but mostly live in deep water on sand and gravel substrates. Certain genera including the sea apples in the genera ''Paracucumaria'' and ''Pseudocolochirus'', contain toxic holothurin and holotoxin and release it into the water when damaged or killed. Spawning may also be accompanied by release of these toxins. For this reason, although they are interesting and attractive to keep in aquaria, it is inadvisable to keep them in a tank with other reef species. Taxonomy A number of species that were placed in the family Phy ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cucumaria Pseudocurata
''Cucumaria'' is a genus of sea cucumbers. Species The following species are recognised in the genus ''Cucumaria''. *''Cucumaria adela'' Clark, 1946 *''Cucumaria anivaensis'' Levin, 2004 *'' Cucumaria arcuata'' (Hérouard, 1921) *''Cucumaria compressa'' (R. Perrier, 1898) *'' Cucumaria conicospermium'' Levin & Stepanov, 2002 *''Cucumaria crax'' Deichmann, 1941 *'' Cucumaria diligens'' D'yakonov & Baranova in D'yakonov, Baranova & Savel'eva, 1958 *'' Cucumaria djakonovi'' Baranova, 1980 *'' Cucumaria dudexa'' O'Loughlin & Manjón-Cabeza, 2009 *''Cucumaria duriuscula'' Sluiter, 1901 *''Cucumaria fallax'' Ludwig, 1875 *''Cucumaria flamma'' Solis-Marin & Laguarda-Figueras, 1999 *''Cucumaria frondosa'' (Gunnerus, 1767) – orange-footed sea cucumber *''Cucumaria fusiformis'' Levin, 2006 *''Cucumaria georgiana'' (Lampert, 1886) *'' Cucumaria ijimai'' Ohshima, 1915 *'' Cucumaria insperata'' D'yakonov & Baranova in D'yakonov, Baranova & Savel'eva, 1958 *'' Cucumaria irregularis'' Vaney, 1 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vitreolina Columbiana
''Vitreolina'' is a genus of very small parasitic sea snails, marine gastropod mollusks or micromollusks in the Eulimidae family. This genus was first described by Monterosato in 1884. He proposed it as a section in the family Eulimidae for some of the Mediterranean species. It contains the small vitreous species without internal varices, with curved spire A spire is a tall, slender, pointed structure on top of a roof of a building or tower, especially at the summit of church steeples. A spire may have a square, circular, or polygonal plan, with a roughly conical or pyramidal shape. Spires are ... and slightly obtuse apex. Species Species within the genus ''Vitreolina'' include: *'' Vitreolina alayoi'' Espinosa, Ortea & Magaña, 2001 *'' Vitreolina antiflexa'' Monterosato, 1884 *'' Vitreolina arcuata'' C. B. Adams, 1850 *'' Vitreolina aurata'' Hirase, 1920 *'' Vitreolina bermudezi'' Pilsbry & Aguayo, 1933 *'' Vitreolina chondrocidaricola'' Warén, B. L. Burch & ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gonochorism
In biology, gonochorism is a sexual system where there are only two Sex, sexes and each individual organism is either male or female. The term gonochorism is usually applied in animal species, the vast majority of which are gonochoric. Gonochorism contrasts with Hermaphrodite, simultaneous hermaphroditism but it may be hard to tell if a species is gonochoric or sequentially hermaphroditic. (e.g. Parrotfish, ''Patella ferruginea''). However, in gonochoric species individuals remain either male or female throughout their lives. Species that reproduce by Thelytokous, thelytokous parthenogenesis and do not have males can still be classified as gonochoric. Terminology The term is derived from Greek language, Greek (''gone'', generation) + (''chorizein,'' to separate). The term gonochorism originally came from German gonochorismus. Gonochorism is also referred to as unisexualism or gonochory. Evolution Gonochorism has Convergent evolution, evolved independently multiple time ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bivalvia
Bivalvia (), in previous centuries referred to as the Lamellibranchiata and Pelecypoda, is a class of marine and freshwater molluscs Mollusca is the second-largest phylum of invertebrate animals after the Arthropoda, the members of which are known as molluscs or mollusks (). Around 85,000 extant species of molluscs are recognized. The number of fossil species is estim ... that have laterally compressed bodies enclosed by a shell consisting of two hinged parts. As a group, bivalves have no head and they lack some usual molluscan organs, like the radula and the odontophore. They include the clams, oysters, Cockle (bivalve), cockles, mussels, scallops, and numerous other family (biology), families that live in saltwater, as well as a number of families that live in freshwater. The majority are filter feeders. The gills have evolved into Ctenidium (mollusc), ctenidia, specialised organs for feeding and breathing. Most bivalves bury themselves in sediment, where they a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
California Mussel
The California mussel (''Mytilus californianus'') is a large edible mussel, a marine bivalve mollusk in the family Mytilidae. This species is native to the west coast of North America, occurring from northern Mexico to the Aleutian Islands of Alaska. California mussels are found clustered together, often in very large aggregations, on rocks in the upper intertidal zone on the open coast, where they are exposed to the strong action of the surf. Shell description The shell of this species is thick and is often in length, sometimes larger still. The shell is blue on the outside with a heavy brown periostracum which is usually worn off except near the growing edge of the shell. The beaks of the shell are often eroded. The shell has coarse radial ribbing and irregular growth lines on the outer surface. The inner surface of the shell is blue and faintly pearly. Like other mytilids, the animal is attached to the substrate with a very strong and elastic byssus. The shell is pr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Intertidal Zone
The intertidal zone, also known as the foreshore, is the area above water level at low tide and underwater at high tide (in other words, the area within the tidal range). This area can include several types of habitats with various species of life, such as seastars, sea urchins, and many species of coral with regional differences in biodiversity. Sometimes it is referred to as the ''littoral zone'' or '' seashore'', although those can be defined as a wider region. The well-known area also includes steep rocky cliffs, sandy beaches, bogs or wetlands (e.g., vast mudflats). The area can be a narrow strip, as in Pacific islands that have only a narrow tidal range, or can include many meters of shoreline where shallow beach slopes interact with high tidal excursion. The peritidal zone is similar but somewhat wider, extending from above the highest tide level to below the lowest. Organisms in the intertidal zone are adapted to an environment of harsh extremes, living in water pr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
British Columbia
British Columbia (commonly abbreviated as BC) is the westernmost province of Canada, situated between the Pacific Ocean and the Rocky Mountains. It has a diverse geography, with rugged landscapes that include rocky coastlines, sandy beaches, forests, lakes, mountains, inland deserts and grassy plains, and borders the province of Alberta to the east and the Yukon and Northwest Territories to the north. With an estimated population of 5.3million as of 2022, it is Canada's third-most populous province. The capital of British Columbia is Victoria and its largest city is Vancouver. Vancouver is the third-largest metropolitan area in Canada; the 2021 census recorded 2.6million people in Metro Vancouver. The first known human inhabitants of the area settled in British Columbia at least 10,000 years ago. Such groups include the Coast Salish, Tsilhqotʼin, and Haida peoples, among many others. One of the earliest British settlements in the area was Fort Victoria, established ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
