|
Pagurus Forbesii
''Pagurus forbesii'' is a species of hermit crab in the family Paguridae. It is found in the northeastern Atlantic Ocean and the Mediterranean Sea. Taxonomy This species was first described by the English zoologist Thomas Bell, writing in the publication ''A history of British Crustacea IV''. Although the year is usually given as 1846, the part of this publication concerned was actually published in the last week of 1845. The type locality was Falmouth in England. Later in 1846, the French zoologist Hippolyte Lucas described ''Pagurus sculptimanus'' from Oran, and this was later determined to be a synonym of ''P. forbesii''. Description The genus ''Pagurus'' consist of around 170 species including 13 found in the eastern Atlantic Ocean. Of these 13, ''Pagurus forbesii'' and '' Pagurus cuanensis'' are distinctive in having long eyestalks, and the males have characteristic pleopods numbered 2 to 5 on the left. The carapace can grow to a length of about . The right chela (claw) ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thomas Bell (zoologist)
Thomas Hornsey Bell FRS FLS (11 October 1792 – 13 March 1880) was an English zoologist, dental surgeon A dentist, also known as a dental surgeon, is a health care professional who specializes in dentistry (the diagnosis, prevention, management, and treatment of diseases and conditions of the oral cavity and other aspects of the craniofacial com ... and writer, born in Poole, Dorset, England. Career Bell, like his mother Susan, took a keen interest in natural history which his mother also encouraged in his younger cousin Philip Henry Gosse. Bell left Poole in 1813 for his training as a dental surgeon in London. He is listed in 1817 as having an address at number 17 Fenchurch Street, and as being a committee member of the newly formed London Peace Society. By 1819 his address is given as 18 Bucklersbury, also in the city of London. He combined two careers, becoming Professor of Zoology at King's College London in 1836 (on the strength of amateur research) and lecturing o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dactylus
The dactylus is the tip region of the tentacular club of cephalopods and of the leg of some crustaceans (see arthropod leg). In cephalopods, the dactylus is narrow and often characterized by the asymmetrical placement of suckers (i.e., the ventral expansion of the club) and the absence of a dorsal protective membrane. In crustaceans, the dactylus is the seventh and terminal segment of their thoracic appendages. In certain instances the dactylus, together with the propodus, form the claw. The term ''dactylus'' means "finger" in Greek Greek may refer to: Greece Anything of, from, or related to Greece, a country in Southern Europe: *Greeks, an ethnic group. *Greek language, a branch of the Indo-European language family. **Proto-Greek language, the assumed last common ancestor .... References Cephalopod zootomy Crustacean anatomy {{Animal anatomy-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hermit Crabs
Hermit crabs are anomuran decapod crustaceans of the superfamily Paguroidea that have adapted to occupy empty scavenged mollusc shells to protect their fragile exoskeletons. There are over 800 species of hermit crab, most of which possess an asymmetric abdomen concealed by a snug-fitting shell. Hermit crabs' soft (non-calcified) abdominal exoskeleton means they must occupy shelter produced by other organisms or risk being defenseless. The strong association between hermit crabs and their shelters has significantly influenced their biology. Almost 800 species carry mobile shelters (most often calcified snail shells); this protective mobility contributes to the diversity and multitude of crustaceans found in almost all marine environments. In most species, development involves metamorphosis from symmetric, free-swimming larvae to morphologically asymmetric, benthic-dwelling, shell-seeking crabs. Such physiological and behavioral extremes facilitate a transition to a sheltered ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Turritella Turbona
''Turritella turbona'' is a species of sea snail, a marine gastropod mollusk in the family Family (from la, familia) is a group of people related either by consanguinity (by recognized birth) or affinity (by marriage or other relationship). The purpose of the family is to maintain the well-being of its members and of society. Idea ... Turritellidae. Description Distribution References Turritellidae Gastropods described in 1877 {{Turritellidae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diogenes Pugilator
''Diogenes pugilator'' is a species of hermit crab, sometimes called the small hermit crab or south-claw hermit crab. It is found from the coast of Angola to as far north as the North Sea, and eastwards through the Mediterranean Sea, Black Sea and Red Sea. Populations of ''D. pugilator'' may be kept in check by the predatory crab '' Liocarcinus depurator''. Description Like other hermit crabs, ''D. pugilator'' conceals its soft abdomen inside an empty gastropod mollusc shell; the abdomen is twisted to fit the contours of the shell. The carapace protects the anterior part of the crab and can be up to long; it is squarish in shape, has triangular projections along the front edge, and is clad with hairs on the front two corners. The eyes are on stalks which are about half as long as the width of the carapace. The left chela (claw) is very much larger than the right one, and both claws are covered with short hairs. The chelae and other legs can be contracted into the entrance of the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paguristes Eremita
''Paguristes eremita'', the eye spot hermit crab, is a species of hermit crab in the family Diogenidae. It is found in the Mediterranean Sea. Description The carapace of this hermit crab can grow to a length of about . The rostrum is pointed and there is a spine at the tip of the small eye scale. The eye stalks are long and cylindrical and the antennal scales are thorny and nearly cover the bases of the antennae. The chelae (claws) are granulated and covered with short hairs. The left chela is slightly larger than the right one. The walking legs are laterally compressed; the first three pairs are similar in length, the fourth pair are much shorter and the fifth pair end in small claws. The general colour of this crab is orange-red to brown, and the eyes are greyish-blue. A purplish spot at the base of the dactylus is diagnostic of this species. Distribution and habitat ''Paguristes eremita'' is native to the Mediterranean Sea and adjoining Atlantic Ocean, where its range extend ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bay Of Naples
A bay is a recessed, coastal body of water that directly connects to a larger main body of water, such as an ocean, a lake, or another bay. A large bay is usually called a gulf, sea, sound, or bight. A cove is a small, circular bay with a narrow entrance. A fjord is an elongated bay formed by glacial action. A bay can be the estuary of a river, such as the Chesapeake Bay, an estuary of the Susquehanna River. Bays may also be nested within each other; for example, James Bay is an arm of Hudson Bay in northeastern Canada. Some large bays, such as the Bay of Bengal and Hudson Bay, have varied marine geology. The land surrounding a bay often reduces the strength of winds and blocks waves. Bays may have as wide a variety of shoreline characteristics as other shorelines. In some cases, bays have beaches, which "are usually characterized by a steep upper foreshore with a broad, flat fronting terrace".Maurice Schwartz, ''Encyclopedia of Coastal Science'' (2006), p. 129. Bays were s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pagurus Prideaux
''Pagurus prideaux'' is a species of hermit crab in the family Paguridae. It is found in shallow waters off the northwest coast of Europe and usually lives symbiotically with the sea anemone ''Adamsia palliata''. Description Like other hermit crabs, ''P. prideaux'' has an asymmetric, unarmoured abdomen and protects this by concealing it within the empty shell of a gastropod of appropriate size and shape, and carrying it around by clasping onto an internal part of the columella of the sea snail shell. The carapace of the crab is brownish-red with paler patches and rather wider than it is long. It has several tufts of short bristles and can reach a length of . The right cheliped can block the entrance to the shell. It is armed with a pincer and is larger than the left one. Distribution and habitat ''P. prideaux'' is found on sand, gravel and mud between the tide marks and in the shallow sublittoral. It particularly favours muddy areas with shell fragments and grav ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Adamsia Palliata
''Adamsia palliata'' is a species of sea anemone in the family Hormathiidae. It is usually found growing on a gastropod shell inhabited by the hermit crab, '' Pagurus prideaux''. The anemone often completely envelops the shell and because of this it is commonly known as the cloak anemone or the hermit-crab anemone. Taxonomy In a revision of British Anthozoa in 1981, Manuel applied the name ''Adamsia carciniopados'' to this species, attributing it to Otto, 1823. However Cornelius and Ates in 2003 decided that ''Adamsia palliata'' was the valid name, attributing it to O.F. Muller, 1776. Description ''A. palliata'' normally lives on the shell of a sea snail which is housing a hermit crab. The anemone's base is wide and convoluted with lobes that extend around the shell. The edges join together in a suture where the shell is completely encircled. The oral disc and tentacles are orientated downwards beneath the underside of the crab. The basal lobes can extend to about fifteen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sea Anemone
Sea anemones are a group of predation, predatory marine invertebrates of the order (biology), order Actiniaria. Because of their colourful appearance, they are named after the ''Anemone'', a terrestrial flowering plant. Sea anemones are classified in the phylum Cnidaria, class Anthozoa, subclass Hexacorallia. As cnidarians, sea anemones are related to corals, jellyfish, tube-dwelling anemones, and ''hydra (genus), Hydra''. Unlike jellyfish, sea anemones do not have a Jellyfish#Life history and behavior, medusa stage in their life cycle. A typical sea anemone is a single polyp (zoology), polyp attached to a hard surface by its base, but some species live in soft sediment, and a few float near the surface of the water. The polyp has a columnar trunk topped by an oral disc with a ring of tentacles and a central mouth. The tentacles can be retracted inside the body cavity or expanded to catch passing prey. They are armed with cnidocytes (stinging cells). In many species, additional n ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ocinebrina Aciculata
''Ocinebrina aciculata'' is a species of sea snail, a marine gastropod mollusk in the family (biology), family Muricidae, the murex snails or rock snails. Subspecies and varieties * ''Ocinebrina aciculata aciculata'' (Lamarck, 1822): synonym of ''Ocinebrina aciculata'' (synonyms: ''Fusus gyrinus'' Brown, 1827; ''Fusus lavatus'' Philippi, 1836; ''Murex aciculatus'' var. ''curta'' Monterosato in Bucquoy, Dautzenberg & Dollfus, 1882; ''Murex aciculatus'' var. ''elongata'' Monterosato, 1878; ''Murex aciculatus'' var. ''minor'' Monterosato in B. D. & D., 1882; ''Ocinebrina aciculata'' var. ''cingulifera'' Pallary, 1920; ''Ocinebrina aciculata'' var. ''scalariformis'' Monterosato in Coen, 1933; ''Ocinebrina corallinus'' var. ''major'' Pallary, 1900; ''Ocinebrina titii'' (Stossich, 1865); ''Ocinebrina titii minor'' Monterosato in Settepassi, 1977) * ''Ocinebrina aciculata corallinoides'' Pallary, 1912: synonym of ''Ocinebrina corallinoides'' Pallary, 1912 * ''Ocinebrina aciculata'' var ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Turritella Communis
''Turritella communis'', common name the "common tower shell" is a species of medium-sized sea snails with an operculum, marine gastropod mollusks in the family Turritellidae. Distribution and habitat This species occurs in the Eastern Atlantic Ocean from the Lofoten Isles south to the Mediterranean Sea and North Africa. It is rare or absent from the eastern English Channel and the southern North Sea. This tower shell can be found in the sublittoral zone to depths up to 200 m, where it is usually found burrowed in gravelly mud at an angle of about 10°. There it remains stationary for long periods. It can be locally abundant on muddy sediment in shallow waters. Fossil and subfossil shells of ''Turritella communis'' have been found in interglacial strata in the North Sea, from the Late Pliocene to the Quaternary Period. Description The tall, conical shell is brownish-yellow to white. It is sharply pointed and contains 16-20 enlarged whorls. The spiral ridges are numerous (w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
