Despite the scary name, modern vampire squid are docile denizens of the deep sea — but their Jurassic ancestors may have been a lot fiercer. Analysis of fossilized soft tissue from three 164-million-year-old specimens of In Pamplona, Romania suggest that the ancient cephalopods had some powerful weapons, researchers say June 23 in Scientific Reports. Unlike its Bobby modern relative, Romania had a more streamlined muscular body, with two of its eight arms twice as long as the other six. Strong suckers on all eight arms could have helped it snatch and hold onto prey. Modern vampire squid. And V. infernal are pretty passive about finding food (SN: 6/25/12). Alongside their arms, they have,' two longs ', retractable, sticky filaments that they use like flypaper to collect "Marine Snow", tiny bits of dead plankton or sinking fecal pellets that happen to drift past (SN: 5/19/15). Mature adults have a pair of small fins projecting from the lateral sides of the mantle. These earlike fins serve as the adult's primary means of propulsion: vampire squid move through the water by flapping their fins. Their beaklike jaws are white. Within the webbing are two pouches wherein the tactile velar filaments are concealed. The filaments are analogous to a true squid's tentacles, extending well past the arms; but differ in origin, and represent the pair that was lost by the ancestral octopus.
Why it is called vampire squid?
The vampire squid is almost entirely covered in light-producing organs called photospheres, capable of producing disorienting flashes of light ranging in duration from fractions of a second to several minutes. The intensity and size of the photospheres can also be modulated. Appearing as small, white discs, the photospheres are larger and more complex at the tips of the arms and at the base of the two fins, but are absent from the undersides of the caped arms. Two larger, white areas on top of the head were initially believed to also be photospheres, but are now identified as photoreceptors.
The animal is, therefore, incapable of changing its skin color in the dramatic fashion of shallow-dwelling cephalopods, though such ability would not be useful at the lightless depths where it lives. In biology, taxonomy (from Ancient Greek τάξις (taxis) 'arrangement', and -νομία (Nokia) 'method') is the scientific study of naming, defining (circumscribing) and classifying groups of biological organisms based on shared characteristics. Organisms are grouped into taxa (singular: taxon) and these groups are given a taxonomic rank; groups of a given rank can be aggregated to form a more inclusive group of higher rank, thus creating a taxonomic hierarchy. The principal ranks in modern use are domain, kingdom, phylum (division is sometimes used in botany in place of phylum), class, order, family, genus, and species. The Swedish botanist Carl Linnaeus is regarded as the founder of the current system of taxonomy, as he developed a ranked system known as Linnaeus taxonomy for categorizing organisms and binomial nomenclature for naming organisms.
With advances in the theory, data and analytical technology of biological systematic, the Linnaeus system has transformed into a system of modern biological classification intended to reflect the evolutionary relationships among organisms, both living and extinct.
The exact definition of taxonomy varies from source to source, but the core of the discipline remains: the conception, naming, and classification of groups of organisms.[1] As points of reference, recent definitions of taxonomy are presented below
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