Given the question: Information: - Sedimentary basins are regions of Earth of long-term subsidence creating accommodation space for infilling by sediments. The subsidence can result from a variety of causes that include: the thinning of underlying crust, sedimentary, volcanic, and tectonic loading, and changes in the thickness or density of adjacent lithosphere. Sedimentary basins occur in diverse geological settings usually associated with plate tectonic activity. Basins are classified structurally in various ways, with a primary classifications distinguishing among basins formed in various plate tectonic regime (divergent, convergent, transform, intraplate), the proximity of the basin to the active plate margins, and whether oceanic, continental or transitional crust underlies the basin. Basins formed in different plate tectonic regimes vary in their preservation potential. On oceanic crust, basins are likely to be subducted, while marginal continental basins may be partially preserved, and intracratonic basins have a high probability of preservation. As the sediments are buried, they are subjected to increasing pressure and begin the process of lithification. A number of basins formed in extensional settings can undergo inversion which has accounted for a number of the economically viable oil reserves on earth which were formerly basins. - Sedimentary rocks are types of rock that are formed by the deposition and subsequent cementation of that material at the Earth's surface and within bodies of water. Sedimentation is the collective name for processes that cause mineral and/or organic particles (detritus) to settle in place. The particles that form a sedimentary rock by accumulating are called sediment. Before being deposited, the sediment was formed by weathering and erosion from the source area, and then transported to the place of deposition by water, wind, ice, mass movement or glaciers, which are called agents of denudation. Sedimentation may also occur as minerals precipitate from water solution or shells of aquatic creatures settle out of suspension. - Pituri is a mixture of leaves and wood ash traditionally chewed as a stimulant (or, after extended use, a depressant) by Aboriginal Australians widely across the continent. Leaves are gathered from any of several species of native tobacco ("Nicotiana)", or from at least one distinct population of the species "Duboisia hopwoodii". Various species of "Acacia", "Grevillea" and "Eucalyptus" are burned to produce the ash. The term "pituri" may also refer to the plants from which the leaves are gathered or from which the ash is made. Some authors use the term to refer only to the plant "Duboisia hopwoodii" and its leaves and any chewing mixture containing its leaves. - The Northern Territory (abbreviated as NT) is a federal Australian territory in the central and central northern regions of Australia. It shares borders with Western Australia to the west (129th meridian east), South Australia to the south (26th parallel south), and Queensland to the east (138th meridian east). To the north, the territory is bordered by the Timor Sea, the Arafura Sea and the Gulf of Carpentaria. Despite its large areaover , making it the third largest Australian federal divisionit is sparsely populated. The Northern Territory's population of 244,000 (2016) makes it the least populous of Australia's eight major states and territories, having fewer than half as many people as Tasmania. - A fish is any member of a group of organisms that consist of all gill-bearing aquatic craniate animals that lack limbs with digits. They form a sister group to the tunicates, together forming the olfactores. Included in this definition are the living hagfish, lampreys, and cartilaginous and bony fish as well as various extinct related groups. Tetrapods emerged within lobe-finned fishes, so cladistically they are fish as well. However, traditionally fish are rendered obsolete or paraphyletic by excluding the tetrapods (i.e., the amphibians, reptiles, birds and mammals which all descended from within the same ancestry). Because in this manner the term "fish" is defined negatively as a paraphyletic group, it is not considered a formal taxonomic grouping in systematic biology. The traditional term pisces (also ichthyes) is considered a typological, but not a phylogenetic classification. - The Georgina Basin is a large (c. 330,000km) intracratonic sedimentary basin in central and northern Australia, lying mostly within the Northern Territory and partly within Queensland. It is named after the Georgina River which drains part of the basin. Deposition of locally up to c. 4km of marine and non-marine sedimentary rocks took place from the Neoproterozoic to the late Paleozoic (c. 850-350 Ma). Along with other nearby sedimentary basins of similar age (Amadeus Basin, Officer Basin), the Georgina Basin is believed to have once been part of the hypothetical Centralian Superbasin, that was fragmented during episodes of tectonic activity. - Pituriaspis doylei "(Doyle's pituri shield)" was one of two known species of jawless fish belonging to the Class Pituriaspida, and is the better known of the two. The species lived in estuaries during the Givetian epoch of the Middle Devonian, 390 million years ago in what is now the Georgina Basin of Western Queensland, Australia. - Queensland (abbreviated as QLD) is the second-largest and third-most-populous state in the Commonwealth of Australia. Situated in the north-east of the country, it is bordered by the Northern Territory, South Australia and New South Wales to the west, south-west and south respectively. To the east, Queensland is bordered by the Coral Sea and Pacific Ocean. Queensland has a population of 4,750,500, concentrated along the coast and particularly in the state's South East. The state is the world's sixth largest sub-national entity, with an area of 1,852,642km. The capital and largest city in the state is Brisbane, Australia's third largest city. Often referred to as the "Sunshine State", Queensland is home to 10 of Australia's 30 largest cities and is the nation's third largest economy. Tourism in the state, fuelled largely by its warm tropical climate, is a major industry. - The Pituriaspida ( '' Pituri Shield '' ) are a small group of extinct armored jawless fishes with tremendous nose - like rostrums , which lived in the marine , deltaic environments of Middle Devonian Australia ( about 390 Ma ) . They are known only by two species , Pituriaspis doylei and Neeyambaspis enigmatica found in a single sandstone location of the Georgina Basin , in Western Queensland , Australia . '' Pituriaspida '' is often translated as '' hallucinogenic shield . '' '' Pituri '' is a hallucinogenic drug , made from the leaves of the Corkwood Tree and Acacia ash , and used by local Aborigine shamans for vision quests . The pituriaspids ' discoverer , Dr Gavin Young , named Pituriaspis after the drug , because , upon examining the first specimens , he suspected he was hallucinating ( Long , p 59 ) . The better studied species - Pituriaspis doylei , which had a superficial resemblance to the Osteostraci , had an elongate headshield , that , coupled with its spear - like rostrum , gave it a throwing - dart - like appearance . Neeyambaspis enigmatica had a much smaller and shorter rostrum , and a more triangular headshield , making it look as though it were a guitar pick with a tail . After reading the paragraphs above, we are interested in knowing the entity with which 'pituriaspida' exhibits the relationship of 'taxon rank'. Find the answer from the choices below. Choices: - class - division - form - group - species - variety
The answer is:
class