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Allonautilus Scrobiculatus
''Allonautilus scrobiculatus'', also known as the crusty nautilus or fuzzy nautilus, is a species of nautilus native to the waters around New Guinea, specifically New Britain and Milne Bay, and the Solomon Islands. ''A. scrobiculatus'' is recognizable by the large open umbilicus, which is around 20% of the shell diameter at its widest point. This species, along with the closely related '' A. perforatus'', were originally placed in the genus '' Nautilus'', but have recently been given their own genus on account of significant morphological differences.Ward, P.D. & W.B. Saunders 1997''Allonautilus'': a new genus of living nautiloid cephalopod and its bearing on phylogeny of the Nautilida ''Journal of Paleontology'' 71(6): 1054–1064. The most obvious are features of the shell, including crease and an encrusting layer (periostracum) that covers most of the shell. Gills and reproductive structures also differ significantly from members of the genus ''Nautilus''. The shell is us ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Allonautilus Perforatus
''Allonautilus perforatus'' also known as the Bali chambered nautilus, is a species of nautilus native to the waters around Bali, Indonesia. It is known only from drifted shells and, as such, is the least studied of the six recognized nautilus species. Thus, not much is known about it outside of the shell. Habitat and Distribution The nautilus is reported to live on the coastal reefs of Baliand Papua New Guinea. They have been reported to live in nearby deep-water habitats as well. Ultimately little is known about the exact distribution of ''A. perforatus'' compared with the more abundant relatives such as '' A. scrobiculatus.'' Shells of the nautilus are sold in Balinese market placesWard, P.D. & W.B. Saunders 1997''Allonautilus'': a new genus of living nautiloid cephalopod and its bearing on phylogeny of the Nautilida ''Journal of Paleontology'' 71(6): 1054–1064. and tend to be less common. Reports from these markers detail that the shells have notable ''Octopus'' boring ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Papua New Guinea
Papua New Guinea (abbreviated PNG; , ; tpi, Papua Niugini; ho, Papua Niu Gini), officially the Independent State of Papua New Guinea ( tpi, Independen Stet bilong Papua Niugini; ho, Independen Stet bilong Papua Niu Gini), is a country in Oceania that comprises the eastern half of the island of New Guinea and its offshore islands in Melanesia (a region of the southwestern Pacific Ocean north of Australia). Its capital, located along its southeastern coast, is Port Moresby. The country is the world's third largest island country, with an area of . At the national level, after being ruled by three external powers since 1884, including nearly 60 years of Australian administration starting during World War I, Papua New Guinea established its sovereignty in 1975. It became an independent Commonwealth realm in 1975 with Elizabeth II as its queen. It also became a member of the Commonwealth of Nations in its own right. There are 839 known languages of Papua New Guinea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nautilus Umbilicatus
''Allonautilus scrobiculatus'', also known as the crusty nautilus or fuzzy nautilus, is a species of nautilus native to the waters around New Guinea, specifically New Britain and Milne Bay, and the Solomon Islands. ''A. scrobiculatus'' is recognizable by the large open umbilicus, which is around 20% of the shell diameter at its widest point. This species, along with the closely related '' A. perforatus'', were originally placed in the genus '' Nautilus'', but have recently been given their own genus on account of significant morphological differences.Ward, P.D. & W.B. Saunders 1997''Allonautilus'': a new genus of living nautiloid cephalopod and its bearing on phylogeny of the Nautilida ''Journal of Paleontology'' 71(6): 1054–1064. The most obvious are features of the shell, including crease and an encrusting layer (periostracum) that covers most of the shell. Gills and reproductive structures also differ significantly from members of the genus ''Nautilus''. The shell is us ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Registry Of World Record Size Shells
The ''Registry of World Record Size Shells'' is a conchological work listing the largest (and in some cases smallest) verified shell specimens of various marine molluscan taxa. A successor to the earlier ''World Size Records'' of Robert J. L. Wagner and R. Tucker Abbott, it has been published on a semi-regular basis since 1997, changing ownership and publisher a number of times. Originally planned for release every two years, new editions are now published annually. Since 2008 the entire registry has been available online in the form of a searchable database. The registry is continuously expanded and now contains more than 24,000 listings and 85,000 supporting images.Registry of World Record Size Shells wrs-shells.com. Quiquandon, P. (16 March 2011) [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gill
A gill () is a respiratory organ that many aquatic organisms use to extract dissolved oxygen from water and to excrete carbon dioxide. The gills of some species, such as hermit crabs, have adapted to allow respiration on land provided they are kept moist. The microscopic structure of a gill presents a large surface area to the external environment. Branchia (pl. branchiae) is the zoologists' name for gills (from Ancient Greek ). With the exception of some aquatic insects, the filaments and lamellae (folds) contain blood or coelomic fluid, from which gases are exchanged through the thin walls. The blood carries oxygen to other parts of the body. Carbon dioxide passes from the blood through the thin gill tissue into the water. Gills or gill-like organs, located in different parts of the body, are found in various groups of aquatic animals, including mollusks, crustaceans, insects, fish, and amphibians. Semiterrestrial marine animals such as crabs and mudskippers have gill c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Periostracum
The periostracum ( ) is a thin, organic coating (or "skin") that is the outermost layer of the shell of many shelled animals, including molluscs and brachiopods. Among molluscs, it is primarily seen in snails and clams, i.e. in gastropods and bivalves, but it is also found in cephalopods such as ''Allonautilus scrobiculatus''. The periostracum is an integral part of the shell, and it forms as the shell forms, along with the other shell layers. The periostracum is used to protect the organism from corrosion. The periostracum is visible as the outer layer of the shell of many molluscan species from terrestrial, freshwater, and marine habitats, and may be seen in land snails, river mussels, and other kinds of freshwater bivalves, as well as in many kinds of marine shelled molluscs. The word ''periostracum'' means "around the shell", meaning that the periostracum is wrapped around what is usually the more calcareous part of the shell. Technically, the calcareous part of the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nautilus (genus)
''Nautilus'' is a genus of cephalopods in the family Nautilidae. Species in this genus differ significantly in terms of morphology from those placed in the sister taxon '' Allonautilus''. The oldest fossils of the genus are known from the Late Eocene Hoko River Formation, in Washington State and from Late-Eocene to Early Oligocene sediments in Kazakhstan. The oldest fossils of the modern species ''Nautilus pompilius'' are from Early Pleistocene sediments off the coast of Luzon in the Philippines. The commonly used term 'nautilus' usually refers to any of the surviving members of ''Nautilidae'', and more specifically to the ''Nautilus pompilius'' species. The entire family of ''Nautilidae'', including all species in the genera ''Nautilus'' and ''Allonautilus'', is listed on Appendix II of the Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES). The current consensus is that the genus consists of four valid species, although this remains the s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Genus
Genus ( plural genera ) is a taxonomic rank used in the biological classification of living and fossil organisms as well as viruses. In the hierarchy of biological classification, genus comes above species and below family. In binomial nomenclature, the genus name forms the first part of the binomial species name for each species within the genus. :E.g. ''Panthera leo'' (lion) and ''Panthera onca'' (jaguar) are two species within the genus '' Panthera''. ''Panthera'' is a genus within the family Felidae. The composition of a genus is determined by taxonomists. The standards for genus classification are not strictly codified, so different authorities often produce different classifications for genera. There are some general practices used, however, including the idea that a newly defined genus should fulfill these three criteria to be descriptively useful: # monophyly – all descendants of an ancestral taxon are grouped together (i.e. phylogenetic analysis should clea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Umbilicus (mollusc)
The umbilicus of a shell is the axially aligned, hollow cone-shaped space within the whorls of a coiled mollusc shell. The term umbilicus is often used in descriptions of gastropod shells, i.e. it is a feature present on the ventral (or under) side of many (but not all) snail shells, including some species of sea snails, land snails, and freshwater snails. The word is also applied to the depressed central area on the planispiral coiled shells of ''Nautilus'' species and fossil ammonites. (These are not gastropods, but shelled cephalopods.) In gastropods The spirally coiled whorls of gastropod shells frequently connect to each other by their inner sides, during the natural course of its formation. This results in a more or less solid central axial pillar, known as the columella. The more intimate the contact between the concave side of the whorls is, the more solid the columella becomes. On the other hand, if this connection is less intense, a hollow space inside the whorls may ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
John Lightfoot (biologist)
The Reverend John Lightfoot (9 December 1735 – 20 February 1788) was an English parson-naturalist, spending much of his free time as a conchologist and botanist. He was a systematic and effective curator of the private museum of Margaret Bentinck, Duchess of Portland. He is best known for his ''Flora Scotica'' which pioneered the scientific study of the plants and fungi of Scotland. He was elected a Fellow of the Royal Society for his scientific work. Life and work Lightfoot was born in Newent, Gloucestershire. His father Stephen Lightfoot was a yeoman farmer.Boulger, George Simonds. DNB, 1885–1900, Volume 33: Lightfoot, John He was educated at Pembroke College, Oxford. He gained a BA in 1756 and an MA in 1766. He was elected as a Fellow of the Royal Society in 1785. Lightfoot was Rector of Gotham, and the chaplain and librarian for Margaret Bentinck, Duchess of Portland. He was also curate of Colnbrook, Buckinghamshire and then of Uxbridge, Middlesex, a position he h ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Solomon Islands
Solomon Islands is an island country consisting of six major islands and over 900 smaller islands in Oceania, to the east of Papua New Guinea and north-west of Vanuatu. It has a land area of , and a population of approx. 700,000. Its capital, Honiara, is located on the largest island, Guadalcanal. The country takes its name from the wider area of the Solomon Islands (archipelago), which is a collection of Melanesian islands that also includes the Autonomous Region of Bougainville (currently a part of Papua New Guinea), but excludes the Santa Cruz Islands. The islands have been settled since at least some time between 30,000 and 28,800 BCE, with later waves of migrants, notably the Lapita people, mixing and producing the modern indigenous Solomon Islanders population. In 1568, the Spanish navigator Álvaro de Mendaña was the first European to visit them. Though not named by Mendaña, it is believed that the islands were called ''"the Solomons"'' by those who later rec ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Milne Bay
Milne Bay is a large bay in Milne Bay Province, south-eastern Papua New Guinea. More than long and over wide, Milne Bay is a sheltered deep-water harbor accessible via Ward Hunt Strait. It is surrounded by the heavily wooded Stirling Range to the north and south, and on the northern shore, a narrow coastal strip, soggy with sago and mangrove swamps. The bay is named after Sir Alexander Milne. History * Surveyed by Luis Vaez de Torres in July 1606. * Surveyed by Captain Owen Stanley, R.N. F.R.S. in 1850. World War II During World War II, the area was the site of the Battle of Milne Bay in 1942 and by late 1943 it became the major support base, Naval Base Milne Bay, for the New Guinea campaign through the development of Finschhafen as an advanced base after that area was secured in the Huon Peninsula campaign. By January 1944 about 140 vessels were in harbor due to congestion at the facilities. Congestion was relieved by opening of a port at Finschhafen and extensive im ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
