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Rhinoptera Rasilis
''Rhinoptera'' is a genus of ray commonly known as the cownose rays. This genus is the only member of the family Rhinopteridae. Species There are currently 8 recognized extant (living) species in this genus: * '' Rhinoptera adspersa'' J. P. Müller & Henle, 1841 (Rough cownose ray) * '' Rhinoptera bonasus'' ( Mitchill, 1815) (Cownose ray) * '' Rhinoptera brasiliensis'' J. P. Müller, 1836 (Brazilian cownose ray) * ''Rhinoptera javanica'' J. P. Müller & Henle, 1841 (Flapnose ray) * ''Rhinoptera jayakari'' Boulenger, 1895 (Oman cownose ray) * ''Rhinoptera marginata'' ( É. Geoffroy Saint-Hilaire, 1817) (Lusitanian cownose ray) * '' Rhinoptera neglecta'' J. D. Ogilby, 1912 (Australian cownose ray) * ''Rhinoptera steindachneri'' Evermann & O. P. Jenkins, 1891 (Pacific cownose ray) There are several other extinct species that only are known from fossil remains: * †''Rhinoptera prisca'' Woodward, 1907 * †''Rhinoptera rasilis'' Böhm, 1926 * †''Rhinoptera raeburni'' Whi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rhinoptera Steindachneri
The golden cownose ray or Pacific cownose ray (''Rhinoptera steindachneri'') is a species of eagle ray, family Myliobatidae. It is found in the East Pacific along the coast of Colombia, Costa Rica, Ecuador, El Salvador, Guatemala, Honduras, Mexico, Nicaragua, Panama, and Peru. Its natural habitats are open seas, shallow seas, subtidal aquatic beds, estuarine waters, intertidal marshes, and coastal saline lagoons. They are often in schools, and sometimes associated with the spotted eagle ray''.'' Like all members of eagle rays, they demonstrate ovoviparity. Ovulation and birth occurred in May, June and July, with a low fecundity, large size at maturity and birth and a continuous and synchronous annual reproductive cycle. According to J. Bizzarro, Wade Smith, J. Fernando Márquez-Farías, and Robert E. Hueter, these rays are not of much value within fisheries and are harmless to humans, however one of the main threats to this species is overexploitation and habitat destruction ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rhinoptera Marginata
The Lusitanian cownose ray (''Rhinoptera marginata'') is a species of eagle ray found along the western coast of Africa and Mediterranean Sea. It is apparently very rare in the Mediterranean Sea, but is common in shallow waters off the western Africa. Description Its maximum width is . Distribution It is found in the eastern Atlantic from Portugal to the Central African coast and in the eastern part of the Mediterranean Sea.Guide of Mediterranean Skates and Rays (Rhinoptera marginata). Oct. 2022. Mendez L., Bacquet A. and F. Briand.http://www.ciesm.org/Guide/skatesandrays/rhinoptera-marginata Life cycle They exhibit ovoviparity Ovoviviparity, ovovivipary, ovivipary, or aplacental viviparity is a term used as a "bridging" form of reproduction between egg-laying oviparous and live-bearing viviparous reproduction. Ovoviviparous animals possess embryos that develop ins ... (aplacental viviparity), with embryos feeding initially on yolk, then receiving additional nourishment f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rhinoptera Studeri
''Rhinoptera'' is a genus of ray commonly known as the cownose rays. This genus is the only member of the family Rhinopteridae. Species There are currently 8 recognized extant (living) species in this genus: * '' Rhinoptera adspersa'' J. P. Müller & Henle, 1841 (Rough cownose ray) * '' Rhinoptera bonasus'' ( Mitchill, 1815) (Cownose ray) * '' Rhinoptera brasiliensis'' J. P. Müller, 1836 (Brazilian cownose ray) * ''Rhinoptera javanica'' J. P. Müller & Henle, 1841 (Flapnose ray) * ''Rhinoptera jayakari'' Boulenger, 1895 (Oman cownose ray) * ''Rhinoptera marginata'' ( É. Geoffroy Saint-Hilaire, 1817) (Lusitanian cownose ray) * '' Rhinoptera neglecta'' J. D. Ogilby, 1912 (Australian cownose ray) * ''Rhinoptera steindachneri'' Evermann & O. P. Jenkins, 1891 (Pacific cownose ray) There are several other extinct species that only are known from fossil remains: * †''Rhinoptera prisca'' Woodward, 1907 * †''Rhinoptera rasilis'' Böhm, 1926 * †''Rhinoptera raeburni'' Whi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rhinoptera Smithii
''Rhinoptera'' is a genus of ray commonly known as the cownose rays. This genus is the only member of the family Rhinopteridae. Species There are currently 8 recognized extant (living) species in this genus: * '' Rhinoptera adspersa'' J. P. Müller & Henle, 1841 (Rough cownose ray) * '' Rhinoptera bonasus'' ( Mitchill, 1815) (Cownose ray) * '' Rhinoptera brasiliensis'' J. P. Müller, 1836 (Brazilian cownose ray) * ''Rhinoptera javanica'' J. P. Müller & Henle, 1841 (Flapnose ray) * ''Rhinoptera jayakari'' Boulenger, 1895 (Oman cownose ray) * ''Rhinoptera marginata'' ( É. Geoffroy Saint-Hilaire, 1817) (Lusitanian cownose ray) * '' Rhinoptera neglecta'' J. D. Ogilby, 1912 (Australian cownose ray) * ''Rhinoptera steindachneri'' Evermann & O. P. Jenkins, 1891 (Pacific cownose ray) There are several other extinct species that only are known from fossil remains: * †''Rhinoptera prisca'' Woodward, 1907 * †''Rhinoptera rasilis'' Böhm, 1926 * †''Rhinoptera raeburni'' Whi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rhinoptera Sherborni
''Rhinoptera'' is a genus of ray commonly known as the cownose rays. This genus is the only member of the family Rhinopteridae. Species There are currently 8 recognized extant (living) species in this genus: * '' Rhinoptera adspersa'' J. P. Müller & Henle, 1841 (Rough cownose ray) * '' Rhinoptera bonasus'' ( Mitchill, 1815) (Cownose ray) * '' Rhinoptera brasiliensis'' J. P. Müller, 1836 (Brazilian cownose ray) * ''Rhinoptera javanica'' J. P. Müller & Henle, 1841 (Flapnose ray) * ''Rhinoptera jayakari'' Boulenger, 1895 (Oman cownose ray) * ''Rhinoptera marginata'' ( É. Geoffroy Saint-Hilaire, 1817) (Lusitanian cownose ray) * '' Rhinoptera neglecta'' J. D. Ogilby, 1912 (Australian cownose ray) * ''Rhinoptera steindachneri'' Evermann & O. P. Jenkins, 1891 (Pacific cownose ray) There are several other extinct species that only are known from fossil remains: * †''Rhinoptera prisca'' Woodward, 1907 * †''Rhinoptera rasilis'' Böhm, 1926 * †''Rhinoptera raeburni'' Whi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rhinoptera Schultzi
''Rhinoptera'' is a genus of ray commonly known as the cownose rays. This genus is the only member of the family Rhinopteridae. Species There are currently 8 recognized extant (living) species in this genus: * '' Rhinoptera adspersa'' J. P. Müller & Henle, 1841 (Rough cownose ray) * '' Rhinoptera bonasus'' ( Mitchill, 1815) (Cownose ray) * '' Rhinoptera brasiliensis'' J. P. Müller, 1836 (Brazilian cownose ray) * ''Rhinoptera javanica'' J. P. Müller & Henle, 1841 (Flapnose ray) * ''Rhinoptera jayakari'' Boulenger, 1895 (Oman cownose ray) * ''Rhinoptera marginata'' ( É. Geoffroy Saint-Hilaire, 1817) (Lusitanian cownose ray) * '' Rhinoptera neglecta'' J. D. Ogilby, 1912 (Australian cownose ray) * ''Rhinoptera steindachneri'' Evermann & O. P. Jenkins, 1891 (Pacific cownose ray) There are several other extinct species that only are known from fossil remains: * †''Rhinoptera prisca'' Woodward, 1907 * †''Rhinoptera rasilis'' Böhm, 1926 * †''Rhinoptera raeburni'' Whi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rhinoptera Raeburni
''Rhinoptera'' is a genus of ray commonly known as the cownose rays. This genus is the only member of the family Rhinopteridae. Species There are currently 8 recognized extant (living) species in this genus: * '' Rhinoptera adspersa'' J. P. Müller & Henle, 1841 (Rough cownose ray) * '' Rhinoptera bonasus'' ( Mitchill, 1815) (Cownose ray) * '' Rhinoptera brasiliensis'' J. P. Müller, 1836 (Brazilian cownose ray) * ''Rhinoptera javanica'' J. P. Müller & Henle, 1841 (Flapnose ray) * ''Rhinoptera jayakari'' Boulenger, 1895 (Oman cownose ray) * ''Rhinoptera marginata'' ( É. Geoffroy Saint-Hilaire, 1817) (Lusitanian cownose ray) * '' Rhinoptera neglecta'' J. D. Ogilby, 1912 (Australian cownose ray) * ''Rhinoptera steindachneri'' Evermann & O. P. Jenkins, 1891 (Pacific cownose ray) There are several other extinct species that only are known from fossil remains: * †''Rhinoptera prisca'' Woodward, 1907 * †''Rhinoptera rasilis'' Böhm, 1926 * †''Rhinoptera raeburni'' Whi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rhinoptera Rasilis
''Rhinoptera'' is a genus of ray commonly known as the cownose rays. This genus is the only member of the family Rhinopteridae. Species There are currently 8 recognized extant (living) species in this genus: * '' Rhinoptera adspersa'' J. P. Müller & Henle, 1841 (Rough cownose ray) * '' Rhinoptera bonasus'' ( Mitchill, 1815) (Cownose ray) * '' Rhinoptera brasiliensis'' J. P. Müller, 1836 (Brazilian cownose ray) * ''Rhinoptera javanica'' J. P. Müller & Henle, 1841 (Flapnose ray) * ''Rhinoptera jayakari'' Boulenger, 1895 (Oman cownose ray) * ''Rhinoptera marginata'' ( É. Geoffroy Saint-Hilaire, 1817) (Lusitanian cownose ray) * '' Rhinoptera neglecta'' J. D. Ogilby, 1912 (Australian cownose ray) * ''Rhinoptera steindachneri'' Evermann & O. P. Jenkins, 1891 (Pacific cownose ray) There are several other extinct species that only are known from fossil remains: * †''Rhinoptera prisca'' Woodward, 1907 * †''Rhinoptera rasilis'' Böhm, 1926 * †''Rhinoptera raeburni'' Whi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rhinoptera Prisca
''Rhinoptera'' is a genus of ray commonly known as the cownose rays. This genus is the only member of the family Rhinopteridae. Species There are currently 8 recognized extant (living) species in this genus: * '' Rhinoptera adspersa'' J. P. Müller & Henle, 1841 (Rough cownose ray) * '' Rhinoptera bonasus'' ( Mitchill, 1815) (Cownose ray) * '' Rhinoptera brasiliensis'' J. P. Müller, 1836 (Brazilian cownose ray) * ''Rhinoptera javanica'' J. P. Müller & Henle, 1841 (Flapnose ray) * ''Rhinoptera jayakari'' Boulenger, 1895 (Oman cownose ray) * ''Rhinoptera marginata'' ( É. Geoffroy Saint-Hilaire, 1817) (Lusitanian cownose ray) * '' Rhinoptera neglecta'' J. D. Ogilby, 1912 (Australian cownose ray) * ''Rhinoptera steindachneri'' Evermann & O. P. Jenkins, 1891 (Pacific cownose ray) There are several other extinct species that only are known from fossil remains: * †''Rhinoptera prisca'' Woodward, 1907 * †''Rhinoptera rasilis'' Böhm, 1926 * †''Rhinoptera raeburni'' Whi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fossil
A fossil (from Classical Latin , ) is any preserved remains, impression, or trace of any once-living thing from a past geological age. Examples include bones, shells, exoskeletons, stone imprints of animals or microbes, objects preserved in amber, hair, petrified wood and DNA remnants. The totality of fossils is known as the ''fossil record''. Paleontology is the study of fossils: their age, method of formation, and evolutionary significance. Specimens are usually considered to be fossils if they are over 10,000 years old. The oldest fossils are around 3.48 billion years old to 4.1 billion years old. Early edition, published online before print. The observation in the 19th century that certain fossils were associated with certain rock strata led to the recognition of a geological timescale and the relative ages of different fossils. The development of radiometric dating techniques in the early 20th century allowed scientists to quantitatively measure the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Extinct
Extinction is the termination of a kind of organism or of a group of kinds (taxon), usually a species. The moment of extinction is generally considered to be the death of the last individual of the species, although the capacity to breed and recover may have been lost before this point. Because a species' potential range may be very large, determining this moment is difficult, and is usually done retrospectively. This difficulty leads to phenomena such as Lazarus taxa, where a species presumed extinct abruptly "reappears" (typically in the fossil record) after a period of apparent absence. More than 99% of all species that ever lived on Earth, amounting to over five billion species, are estimated to have died out. It is estimated that there are currently around 8.7 million species of eukaryote globally, and possibly many times more if microorganisms, like bacteria, are included. Notable extinct animal species include non-avian dinosaurs, saber-toothed cats, dodos, m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oliver Peebles Jenkins
Oliver Peebles Jenkins (born Bantam, Ohio November 3, 1850; died Palo Alto, California January 9, 1935) was an American physiologist and histologist, mainly associated with Stanford University. Career Jenkins graduated from Moores Hill College (now the University of Evansville) in 1869 and served as a teacher, high school principal and superintendent in the public school systems of Indiana, Wisconsin and California, returning to Moores Hill College in 1876 to take up a post as a professor. In 1883 he was appointed to the faculty of the Indiana State Normal School (now Indiana State University) at Terre Haute and he became Professor of Biology at DePauw University in 1886 where he remained until 1891. In that year he was appointed a founding faculty member at Stanford University and he remained there until he retired in 1916 when he was Professor Emeritus of Physiology. He collected specimens on expeditions with David Starr Jordan and Barton Warren Evermann and he wrote works on th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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