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Calcinus Verrillii
''Calcinus verrillii'', commonly known as Verrill's hermit crab, is a species of hermit crab in the genus ''Calcinus'' which is endemic to Bermuda. It was first described by the American zoologist Mary J. Rathbun and named in honour of the American zoologist Addison Emery Verrill, who spent much time with his students studying the geology and marine fauna of Bermuda. Although this hermit crab species generally inhabits the discarded shell of a free-living gastropod mollusc, it sometimes makes use of the empty, tube-like shells of certain gastropod mollusc species while the tube is permanently cemented to rocks in the reef. Description Like other crabs in the genus ''Calcinus'', ''C. verrillii'' has a robust, calcified carapace, eight thoracic segments and six or seven abdominal segments. The carapace and legs are spotted with purple and orange, the eyes have slender eyestalks and the front three pairs of walking legs are smooth and hairless. The soft abdomen is coiled and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mary J
Mary may refer to: People * Mary (name), a feminine given name (includes a list of people with the name) Religious contexts * New Testament people named Mary, overview article linking to many of those below * Mary, mother of Jesus, also called the Blessed Virgin Mary * Mary Magdalene, devoted follower of Jesus * Mary of Bethany, follower of Jesus, considered by Western medieval tradition to be the same person as Mary Magdalene * Mary, mother of James * Mary of Clopas, follower of Jesus * Mary, mother of John Mark * Mary of Egypt, patron saint of penitents * Mary of Rome, a New Testament woman * Mary, mother of Zechariah and sister of Moses and Aaron; mostly known by the Hebrew name: Miriam * Mary the Jewess one of the reputed founders of alchemy, referred to by Zosimus. * Mary 2.0, Roman Catholic women's movement * Maryam (surah) "Mary", 19th surah (chapter) of the Qur'an Royalty * Mary, Countess of Blois (1200–1241), daughter of Walter of Avesnes and Margaret of Blois * ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tide Pool
A tide pool or rock pool is a shallow pool of seawater that forms on the rocky intertidal shore. Many of these pools exist as separate bodies of water only at low tide. Many tide pool habitats are home to especially adaptable animals that have engaged the attention of naturalists and marine biologists, as well as philosophical essayists: John Steinbeck wrote in ''The Log from the Sea of Cortez'', "It is advisable to look from the tide pool to the stars and then back to the tide pool." Zones from shallow to deep The rocky shoreline exhibits zonation as a feature of the shoreline. Tidal movements of water creates zonation patterns along rocky shores from high to low-tide. The area above the high-tide mark is the supralittoral zone which is virtually a terrestrial environment. The area around the high-tide mark is known as the intertidal fringe. Between the high and low-tide marks is the intertidal or littoral zone. Below the low-tide mark is the sublittoral or subtida ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Filter Feeder
Filter feeders are a sub-group of suspension feeding animals that feed by straining suspended matter and food particles from water, typically by passing the water over a specialized filtering structure. Some animals that use this method of feeding are clams, krill, sponges, baleen whales, and many fish (including some sharks). Some birds, such as flamingos and certain species of duck, are also filter feeders. Filter feeders can play an important role in clarifying water, and are therefore considered ecosystem engineers. They are also important in bioaccumulation and, as a result, as indicator organisms. Fish Most forage fish are filter feeders. For example, the Atlantic menhaden, a type of herring, lives on plankton caught in midwater. Adult menhaden can filter up to four gallons of water a minute and play an important role in clarifying ocean water. They are also a natural check to the deadly red tide. Extensive article on the role of menhaden in the ecosystem and possible resul ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scavenger
Scavengers are animals that consume dead organisms that have died from causes other than predation or have been killed by other predators. While scavenging generally refers to carnivores feeding on carrion, it is also a herbivorous feeding behavior. Scavengers play an important role in the ecosystem by consuming dead animal and plant material. ''Decomposers'' and detritivores complete this process, by consuming the remains left by scavengers. Scavengers aid in overcoming fluctuations of food resources in the environment. The process and rate of scavenging is affected by both biotic and abiotic factors, such as carcass size, habitat, temperature, and seasons. Etymology Scavenger is an alteration of ''scavager,'' from Middle English ''skawager'' meaning "customs collector", from ''skawage'' meaning "customs", from Old North French ''escauwage'' meaning "inspection", from ''schauwer'' meaning "to inspect", of Germanic origin; akin to Old English ''scēawian'' and German ' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vermicularia Spirata
''Vermicularia spirata'', common name the West Indian worm-shell or the West Indian wormsnail, is a species of sea snail, a marine gastropod mollusc in the family Turritellidae. Juveniles can move around, but larger individuals become sessile. Distribution ''Vermicularia spirata'' occurs in shallow water in the northwestern Atlantic Ocean, the Caribbean Sea and the Gulf of Mexico. Its range includes Mexico, Cuba, Jamaica, the Cayman Islands, the Lesser Antilles and Puerto Rico. Description The maximum recorded shell length is 90 mm.Welch J. J. (2010). "The "Island Rule" and Deep-Sea Gastropods: Re-Examining the Evidence". '' PLOS One'' 5(1): e8776. . Habitat The minimum recorded depth for this species is 3 m; the maximum recorded depth is 80 m. Biology ''Vermicularia spirata'' is a filter feeder and is a protandrous hermaphrodite; individuals start their adult life as males, at which stage they are free-living, but later become females and attach themselves to various s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vermicularia Knorrii
''Vermicularia knorrii'', commonly known as the Florida worm snail, is a species of sea snail, a marine gastropod in the family Turritellidae. ''V. knorrii'' has been concluded to be the junior synonym to ''Vermicularia lumbricalis''. The shell of Florida worm snail is light brown or tan in color with an apex that is white. It is found living in reefs on the coasts of the southern states of the United States to the top of South America. ''V. knorri'' use their ciliated appendages to trap plankton and sperm. Distribution This species is found in the United States from Florida to North Carolina, the Gulf Coast, the eastern coast of Mexico, Aruba, The Bahamas, Antigua, Barbuda, Cuba, Jamaica, Puerto Rico, and Bermuda''. Vermicularia knorrii'' is strictly marine and does not live in brackish or fresh waters and is not terrestrial. ''V. knorrii'' is found in waters with temperatures around . Habitat ''Vermicularia knorrii'' habitat ranges from 35.34°N to 12°N and 92°W to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Turritellidae
Turritellidae, common name the "tower shells" or "tower snails", is a taxonomic family of small to medium-sized sea snails, marine gastropod molluscs in the clade Sorbeoconcha. These snails are filter feeders. This method of feeding is somewhat unusual among gastropod mollusks, but is very common in bivalves. Shell description The shells of turritellid species have whorls that are more convex and an aperture which is more circular than it is in the auger shells which are similarly high-spired. The columella is curved and the thin operculum is horny. Anatomy of the soft parts These snails burrow into mud or sand. The foot is relatively small. Taxonomy The following five subfamilies were recognized in the taxonomy of Bouchet & Rocroi (2005): * Turritellinae Lovén, 1847 - synonyms: Zariinae Gray, 1850; Zeacolpini Marwick, 1971; Archimediellidae Starobogatov, 1982; Tachyrhynchinae Golikov, 1986 *Orectospirinae Habe, 1955 *Pareorinae Finlay & Marwick, 1937 *P ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vermetid
The Vermetidae, the worm snails or worm shells, are a taxonomic family of small to medium-sized sea snails, marine Marine is an adjective meaning of or pertaining to the sea or ocean. Marine or marines may refer to: Ocean * Maritime (other) * Marine art * Marine biology * Marine debris * Marine habitats * Marine life * Marine pollution Military * ... gastropod molluscs in the clade Littorinimorpha. The shells of species in the family Vermetidae are extremely irregular, and do not resemble the average snail shell, hence the common name "worm shells" or "worm snails". These snails usually grow cemented onto a hard surface, or cemented together in colonies. Shell description These snails do not have typical regularly coiled gastropod shells; instead, they have very irregular elongated tubular shells which are moulded to, and cemented to, a surface of attachment such as a rock or another shell. In the adult, the aperture (mollusc), apertural part of the shell is usual ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cerithium Litteratum
''Cerithium litteratum'' is a species of sea snail, a marine gastropod mollusk in the family Cerithiidae. Distribution ''Cerithium litteratum'' has been living in shallower waters and reefs of the Western Central Atlantic Ocean, from South Carolina to Florida including the Gulf of Mexico in North America over Central America (Belize) to South America (Brazil), and has been documented in the Indian Ocean. It prefers water temperatures and ecosystems associated with a tropical climate.''Cerithium litteratum'' sealifebase.org, accessed 9 January 2011. It was judged to be an 'occasional' in the Mediterranean Sea, based on a 1978 find by fi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Uropod
Uropods are posterior appendages found on a wide variety of crustaceans. They typically have functions in locomotion. Definition Uropods are often defined as the appendages of the last body segment of a crustacean. An alternative definition suggested by Frederick R. Schram restricts the term to those structures arising from the segment before the anal segment (the segment which carries the anus). Under this latter definition, the appendages of the anal segment are caudal ramus, caudal rami, which are analogy (biology), analogous to uropods. Form Uropods are typically biramous – comprising an endopod and an exopod. The exopod is typically the larger, and may be divided in two by a transverse suture known as the diaeresis. The uropods may work in concert with the telson to form a "tail fan". References {{Reflist, 32em Crustacean anatomy ... [...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] |
