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Aerobius Dactylus
''Aerobius'' is a genus of extinct tardigrades ("water bears") of the superfamily Hypsibioidea. The genus contains a Monotypic taxon, single species, ''A. dactylus'', known from a single individual preserved in amber. The ''Aerobius'' holotype is preserved in the same piece of Late Cretaceous amber as ''Beorn leggi, Beorn'', another extinct tardigrade. The specimen was found near Cedar Lake (Manitoba), Cedar Lake in Manitoba, Canada. Discovery and naming The ''Aerobius'' holotype specimen, Museum of Comparative Zoology, MCZ PALE-4586 is embedded in a piece of amber collected in 1940 by William M. Legg in Manitoba, Canada. The Type locality (biology), type locality is near where the Saskatchewan River enters Cedar Lake (Manitoba), Cedar Lake. The individual is curled and notably shriveled. The holotype of ''Beorn (tardigrade), Beorn'' is preserved in the same amber piece as ''Aerobius''. In the 1964 description of ''Beorn'', Kenneth W. Cooper noted the presence of a much smalle ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Late Cretaceous
The Late Cretaceous (100.5–66 Ma) is the more recent of two epochs into which the Cretaceous Period is divided in the geologic time scale. Rock strata from this epoch form the Upper Cretaceous Series. The Cretaceous is named after ''creta'', the Latin word for the white limestone known as chalk. The chalk of northern France and the white cliffs of south-eastern England date from the Cretaceous Period. Climate During the Late Cretaceous, the climate was warmer than present, although throughout the period a cooling trend is evident. The tropics became restricted to equatorial regions and northern latitudes experienced markedly more seasonal climatic conditions. Geography Due to plate tectonics, the Americas were gradually moving westward, causing the Atlantic Ocean to expand. The Western Interior Seaway divided North America into eastern and western halves; Appalachia and Laramidia. India maintained a northward course towards Asia. In the Southern Hemisphere, Aus ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
A Journal Of Entomology
A, or a, is the first letter and the first vowel letter of the Latin alphabet, used in the modern English alphabet, and others worldwide. Its name in English is '' a'' (pronounced ), plural ''aes''. It is similar in shape to the Ancient Greek letter alpha, from which it derives. The uppercase version consists of the two slanting sides of a triangle, crossed in the middle by a horizontal bar. The lowercase version is often written in one of two forms: the double-storey and single-storey . The latter is commonly used in handwriting and fonts based on it, especially fonts intended to be read by children, and is also found in italic type. In English, '' a'' is the indefinite article, with the alternative form ''an''. Name In English, the name of the letter is the ''long A'' sound, pronounced . Its name in most other languages matches the letter's pronunciation in open syllables. History The earliest known ancestor of A is ''aleph''—the first letter of the Phoenician ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aerobius (claws, MCZ PALE-45862)
''Aerobius'' is a genus of extinct tardigrades ("water bears") of the superfamily Hypsibioidea. The genus contains a single species, ''A. dactylus'', known from a single individual preserved in amber. The ''Aerobius'' holotype is preserved in the same piece of Late Cretaceous amber as ''Beorn'', another extinct tardigrade. The specimen was found near Cedar Lake in Manitoba, Canada. Discovery and naming The ''Aerobius'' holotype specimen, MCZ PALE-4586 is embedded in a piece of amber collected in 1940 by William M. Legg in Manitoba, Canada. The type locality is near where the Saskatchewan River enters Cedar Lake. The individual is curled and notably shriveled. The holotype of ''Beorn'' is preserved in the same amber piece as ''Aerobius''. In the 1964 description of ''Beorn'', Kenneth W. Cooper noted the presence of a much smaller—seemingly poorly preserved—tardigrade potentially distinct from ''Beorne'' in the same amber matrix. However, he refrained from describing t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Biological Sciences
Biology is the scientific study of life and living organisms. It is a broad natural science that encompasses a wide range of fields and unifying principles that explain the structure, function, growth, origin, evolution, and distribution of life. Central to biology are five fundamental themes: the cell as the basic unit of life, genes and heredity as the basis of inheritance, evolution as the driver of biological diversity, energy transformation for sustaining life processes, and the maintenance of internal stability (homeostasis). Biology examines life across multiple levels of organization, from molecules and cells to organisms, populations, and ecosystems. Subdisciplines include molecular biology, physiology, ecology, evolutionary biology, developmental biology, and systematics, among others. Each of these fields applies a range of methods to investigate biological phenomena, including observation, experimentation, and mathematical modeling. Modern biology is grounded in t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
