|
Metabonellia Haswelli
''Metabonellia'' is a genus of marine spoon worms in the family Bonelliidae. It is a monotypic genus and ''Metabonellia haswelli'' is the only species. It is commonly known as the green spoon worm and is found in shallow waters around Australia. Description The female worm has a sac-like trunk with a length of about and a width of . In front of the mouth is an extensible proboscis of about with a forked tip. The proboscis has a ciliated groove on the underside along which food particles are passed to the mouth. Behind the mouth, and close to the nephridium, which is raised on a protuberance, are two chetae (bristles), the bases of which are buried in the muscle. The body wall has transverse rows of papillae with flattened tops. The colour of the trunk is a dark, greyish-green, the proboscis is rather paler, and the edges of the forked tip are whitish. In life, the shape and dimensions of the worm are difficult to ascertain because it is constantly wriggling about. The ovarian ti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Genus
Genus ( plural genera ) is a taxonomic rank used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In the hierarchy of biological classification, genus comes above species and below family (taxonomy), 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 taxonomy (biology), 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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Echiura
The Echiura, or spoon worms, are a small group of marine animals. Once treated as a separate phylum, they are now considered to belong to Annelida. Annelids typically have their bodies divided into segments, but echiurans have secondarily lost their segmentation. The majority of echiurans live in burrows in soft sediment in shallow water, but some live in rock crevices or under boulders, and there are also deep sea forms. More than 230 species have been described. Spoon worms are cylindrical, soft-bodied animals usually possessing a non-retractable proboscis which can be rolled into a scoop-shape to feed. In some species the proboscis is ribbon-like, longer than the trunk and may have a forked tip. Spoon worms vary in size from less than a centimetre in length to more than a metre. Most are deposit feeders, collecting detritus from the sea floor. Fossils of these worms are seldom found and the earliest known fossil specimen is from the Upper Carboniferous ( Pennsylvanian). T ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bonelliidae
Bonelliidae is a family of marine worms (Class Echiura, phylum Annelida) noted for being sexually dimorphic, with males being tiny in comparison with the females. They occupy burrows in the seabed in many parts of the world's oceans, often at great depths. Characteristics Members of the class Echiura are plump, unsegmented worms, commonly known as spoonworms. The mouth is at the anterior end of the trunk and a flattened proboscis extends forward in front of the mouth. The ventral side of the proboscis has a ciliated channel along which food particles and mucus are moved towards the mouth. Close behind the mouth are two hooked chaetae and one or two nephridial pores. The gut is much longer than the body and is folded and coiled inside the coelom (body cavity). The anus is at the posterior end of the body and two anal vesicles with ciliated funnels open into the cloaca. In the family Bonelliidae, the females are very much larger than the dwarf males, and in most, if not all, inst ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Monotypic Taxon
In biology, a monotypic taxon is a taxonomic group (taxon) that contains only one immediately subordinate taxon. A monotypic species is one that does not include subspecies or smaller, infraspecific taxa. In the case of genera, the term "unispecific" or "monospecific" is sometimes preferred. In botanical nomenclature, a monotypic genus is a genus in the special case where a genus and a single species are simultaneously described. In contrast, an oligotypic taxon contains more than one but only a very few subordinate taxa. Examples Just as the term ''monotypic'' is used to describe a taxon including only one subdivision, the contained taxon can also be referred to as monotypic within the higher-level taxon, e.g. a genus monotypic within a family. Some examples of monotypic groups are: Plants * In the order Amborellales, there is only one family, Amborellaceae and there is only one genus, '' Amborella'', and in this genus there is only one species, namely ''Amborella trichopoda ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nephridium
The nephridium (plural ''nephridia'') is an invertebrate organ, found in pairs and performing a function similar to the vertebrate kidneys (which originated from the chordate nephridia). Nephridia remove metabolic wastes from an animal's body. Nephridia come in two basic categories: metanephridia and protonephridia. All nephridia- and kidney- having animals belong to the clade Nephrozoa. Metanephridia A metanephridium (''meta'' = "after") is a type of excretory gland found in many types of invertebrates such as annelids, arthropods and mollusca. (In mollusca, it is known as the Bojanus organ.) A metanephridium typically consists of a ciliated funnel opening into the body cavity, or coelom connected to a duct which may be variously glandularized, folded or expanded (vesiculate) and which typically opens to the organism's exterior. These ciliated tubules pump water carrying surplus ions, metabolic waste, toxins from food, and useless hormones out of the organism by directing them ... [...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] |
Port Jackson
Port Jackson, consisting of the waters of Sydney Harbour, Middle Harbour, North Harbour and the Lane Cove and Parramatta Rivers, is the ria or natural harbour of Sydney, New South Wales, Australia. The harbour is an inlet of the Tasman Sea (part of the South Pacific Ocean). It is the location of the Sydney Opera House and Sydney Harbour Bridge. The location of the first European settlement and colony on the Australian mainland, Port Jackson has continued to play a key role in the history and development of Sydney. Port Jackson, in the early days of the colony, was also used as a shorthand for Sydney and its environs. Thus, many botanists, see, e.g, Robert Brown's ''Prodromus Florae Novae Hollandiae et Insulae Van Diemen'', described their specimens as having been collected at Port Jackson. Many recreational events are based on or around the harbour itself, particularly Sydney New Year's Eve celebrations. The harbour is also the starting point of the Sydney to Hobart Yacht ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
New South Wales
) , nickname = , image_map = New South Wales in Australia.svg , map_caption = Location of New South Wales in AustraliaCoordinates: , subdivision_type = Country , subdivision_name = Australia , established_title = Before federation , established_date = Colony of New South Wales , established_title2 = Establishment , established_date2 = 26 January 1788 , established_title3 = Responsible government , established_date3 = 6 June 1856 , established_title4 = Federation , established_date4 = 1 January 1901 , named_for = Wales , demonym = , capital = Sydney , largest_city = capital , coordinates = , admin_center = 128 local government areas , admin_center_type = Administration , leader_title1 = Monarch , leader_name1 = Charles III , leader_title2 = Governor , leader_name2 = Margaret Beazley , leader_title3 = Premier , leader_name3 = Dominic Perrottet (Liberal) , national_representation = Parliament of Australia , national_representation_type1 = Senat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Boat Harbour Beach
Boat Harbour Beach is a small seaside township located about from Wynyard on the north-west coast of Tasmania. " Boat Harbour" is the name of the locality which surrounds the township. In the , Boat Harbour Beach, Boat Harbour and the nearby districts had a population of 429. Boat Harbour Primary School is a rural government funded public school situated at 17386 Bass Highway Boat Harbour Tasmania 7321. Located nearby are the Boat Harbour fire brigade and Boat Harbour post shop, which first opened on 1 November 1878. History Boat Harbour was originally named Jacobs' Boat Harbour after Captain John Jacobs, master of small vessels owned by the Van Diemen's Land Company. The vessels were used for trading between the VDL establishments at Circular Head and Woolnorth with Launceston, Tasmania Launceston () or () is a city in the north of Tasmania, Australia, at the confluence of the North Esk and South Esk rivers where they become the Tamar River (kanamaluka). As of 2021, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tasmania
) , nickname = , image_map = Tasmania in Australia.svg , map_caption = Location of Tasmania in AustraliaCoordinates: , subdivision_type = Country , subdivision_name = Australia , established_title = Before federation , established_date = Colony of Tasmania , established_title2 = Federation , established_date2 = 1 January 1901 , named_for = Abel Tasman , demonym = , capital = Hobart , largest_city = capital , coordinates = , admin_center = 29 local government areas , admin_center_type = Administration , leader_title1 = Monarch , leader_name1 = Charles III , leader_title2 = Governor , leader_name2 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Flinders, Victoria
Flinders is a seaside town on the Mornington Peninsula in Melbourne, Victoria, Australia, south of Melbourne's Central Business District, located within the Shire of Mornington Peninsula local government area. Flinders recorded a population of 1,130 at the 2021 census. Flinders is located at the point where Western Port meets Bass Strait. History The town was named by George Bass after his friend, the explorer and British naval officer Matthew Flinders. Settlement commenced in 1854 and many pioneers and settlers are buried at the Flinders cemetery. Flinders Post Office opened on 7 March 1863 as the population grew. Flinders was once believed to have previously been known as Mendi-Moke, but this has subsequently been denied. Present day Features of the town include the Flinders Golf Club, a picturesque golf course built on a cliff top, a recreation reserve, a small yacht club, and a long pier out from the protected beach, sheltered from the waters of Bass Strait by West ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Point Lonsdale
Point Lonsdale is a coastal township on the Bellarine Peninsula, near Queenscliff, Victoria, Australia. The town is divided between the Borough of Queenscliffe and the City of Greater Geelong. Point Lonsdale is also one of the headlands which, with Point Nepean, frame The Rip, the entrance to Port Phillip. The headland is dominated by the Point Lonsdale Lighthouse. At the , Point Lonsdale had a population of 2,684. The population grows rapidly over the summer months through to the Easter period due to its popularity as a holiday destination. History The traditional owners of this area are the Wautharong people of the Kulin nation. The escaped convict William Buckley, the first known European to have lived in the area, lived with local Aborigines from 1803 to 1835. A signal station was built in 1854. Permanent European settlement began at Point Lonsdale in the latter half of the 19th century with the construction of a lighthouse in 1863 and the extension of the railway line from ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
