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Usomyrma
''Usomyrma'' is an extinct genus of ant in the formicid subfamily Dolichoderinae. The genus contains a single described species, ''Usomyrma mirabilis'', that is known from two Middle Eocene fossils which were found in Scandinavian amber in Denmark. History ''Usomyrma mirabilis'' is known from two isolated fossils, the holotype and paratype, both of which were housed in the collections of the Zoological Museum of the University of Copenhagen. The fossils are of two complete adult males which have been preserved as inclusions in transparent chunks of Scandinavian amber, also known as Danish amber, found in Denmark. Scandinavian amber is thought to be similar in age to Baltic, Bitterfeld and Rovno ambers, being approximately late Eocene in age. The four amber faunas have been shown to share 17 ant species in common, which make up over 80% of the specimens in amber collections studied for a 2009 paper. Though a large portion of specimens from Scandinavian amber are of species ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dolichoderinae
Dolichoderinae is a subfamily of ants, which includes species such as the Argentine ant (''Linepithema humile''), the erratic ant, the odorous house ant, and the cone ant. The subfamily presents a great diversity of species throughout the world, distributed in different biogeographic realms, from the Palearctic, Nearctic, Afrotropical region and Malaysia, to the Middle East, Australian, and Neotropical regions. This subfamily is distinguished by having a single petiole (no post-petiole) and a slit-like orifice, from which chemical compounds are released. Dolichoderine ants do not possess a sting, unlike ants in some other subfamilies, such as Ponerinae and Myrmicinae, instead relying on the chemical defensive compounds produced from the anal gland. Of the compounds produced by dolichoderine ants, several terpenoids were identified including the previously unknown iridomyrmecin, isoiridomyrmecin, and iridodial. Such compounds are responsible for the smell given off by ants of ... [...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] |
Acta Palaeontologica Polonica
''Acta Palaeontologica Polonica'' is a quarterly peer-reviewed open access scientific journal of paleontology and paleobiology. It was established by Roman Kozłowski in 1956. It is published by the Institute of Paleobiology of the Polish Academy of Sciences and edited by Richard L. Cifelli and Jarosław Stolarski. Abstracting and indexing ''Acta Palaeontologica Polonica'' is abstracted and indexed in: According to the ''Journal Citation Reports'', the journal has a 2010 impact factor The impact factor (IF) or journal impact factor (JIF) of an academic journal is a scientometric index calculated by Clarivate that reflects the yearly mean number of citations of articles published in the last two years in a given journal, as i ... of 1.949, ranking it 11th out of 48 journals in the category "Paleontology". References External links * Institute of Paleobiology Paleontology journals Publications established in 1956 Polish Academy of Sciences academic journals Open ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ocelli
A simple eye (sometimes called a pigment pit) refers to a form of eye or an optical arrangement composed of a single lens and without an elaborate retina such as occurs in most vertebrates. In this sense "simple eye" is distinct from a multi-lensed "compound eye", and is not necessarily at all simple in the usual sense of the word. The structure of an animal's eye is determined by the environment in which it lives, and the behavioural tasks it must fulfill to survive. Arthropods differ widely in the habitats in which they live, as well as their visual requirements for finding food or conspecifics, and avoiding predators. Consequently, an enormous variety of eye types are found in arthropods. They possess a wide variety of novel solutions to overcome visual problems or limitations. Use of the term ''simple eye'' is flexible, and must be interpreted in proper context; for example, the eyes of humans and of other large animals such as most cephalopods, are ''camera eyes'' and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Compound Eye
A compound eye is a visual organ found in arthropods such as insects and crustaceans. It may consist of thousands of ommatidia, which are tiny independent photoreception units that consist of a cornea, lens, and photoreceptor cells which distinguish brightness and color. The image perceived by this arthropod eye is a combination of inputs from the numerous ommatidia, which are oriented to point in slightly different directions. Compared with single-aperture eyes, compound eyes have poor image resolution; however, they possess a very large view angle and the ability to detect fast movement and, in some cases, the polarization of light. Because a compound eye is made up of a collection of ommatidia, each with its own lens, light will enter each ommatidium instead of using a single entrance point. The individual light receptors behind each lens are then turned on and off due to a series of changes in the light intensity during movement or when an object in moving, creating a flic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leptomyrmula Maravignae Holotype Male
''Leptomyrmula'' is an extinct genus of ants of the subfamily Dolichoderinae. It contains a single described species ''Leptomyrmula maravignae'', which was described before the genus existed in 1891. References † A dagger, obelisk, or obelus is a typographical mark that usually indicates a footnote if an asterisk has already been used. The symbol is also used to indicate death (of people) or extinction (of species). It is one of the modern descendan ... Monotypic fossil ant genera Fossil taxa described in 1913 {{Dolichoderinae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leptomyrmex Relictus
A video on how Spider Ant colonies function) ''Leptomyrmex'', or spider ants, is a genus of ants and a distinctive member of the ant subfamily Dolichoderinae. Commonly known as "spider ants" for their long legs and spider-like movements, these orange and black ants are prominent residents of intact wet forest and sclerophyll habitats throughout their range. One extant species, ''Leptomyrmex relictus'', is known from central Brazil; otherwise, the global distribution of this genus is restricted to eastern Australia, New Caledonia and New Guinea, as well as the nearby Indonesian islands of Aru Islands, Aru and Seram. Newly hatched ''Extatosoma tiaratum'' stick insects ant mimicry, mimic these ants to avoid predation. Workers of ''Leptomyrmex'' can be easily recognized by elongate Antenna (biology), antennal scapes which surpass the posterior margin of the head by more than one half their length, a medially notched hypostoma, Mandible (insect mouthpart), mandibles with 7–15 teeth and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leptomyrmex Neotropicus
''Leptomyrmex neotropicus'' is an extinct species of Miocene ant in the genus ''Leptomyrmex''. Described by Baroni Urbani in 1980, a total of 10 workers of this species were found in a single block of Dominican amber. References † † A dagger, obelisk, or obelus is a typographical mark that usually indicates a footnote if an asterisk has already been used. The symbol is also used to indicate death (of people) or extinction (of species). It is one of the modern descendan ... Fossil taxa described in 1980 Miocene insects Fossil ant taxa {{Dolichoderinae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dominican Amber
Dominican amber is amber from the Dominican Republic derived from resin of the extinct tree ''Hymenaea protera''. Dominican amber differentiates itself from Baltic amber by being nearly always transparent, and it has a higher number of fossil inclusions. This has enabled the detailed reconstruction of the ecosystem of a long-vanished tropical forest.George Poinar, Jr. and Roberta Poinar, 1999. ''The Amber Forest: A Reconstruction of a Vanished World'', (Princeton University Press) Age A study in the early 1990s returned a date up to 40 million years old. However, according to Poinar, Dominican amber dates from Oligocene to Miocene, thus about 25 million years old. The oldest, and hardest of this amber comes from the mountain region north of Santiago. The ''La Cumbre'', ''La Toca'', ''Palo Quemado'', ''La Bucara'', and ''Los Cacaos'' mining sites in the ''Cordillera Septentrional'' not far from Santiago. Amber has also been found in the south-eastern Bayaguana/Sabana de la Mar a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leptomyrmula
''Leptomyrmula'' is an extinct genus of ants of the subfamily Dolichoderinae. It contains a single described species ''Leptomyrmula maravignae'', which was described before the genus existed in 1891. References † A dagger, obelisk, or obelus is a typographical mark that usually indicates a footnote if an asterisk has already been used. The symbol is also used to indicate death (of people) or extinction (of species). It is one of the modern descendan ... Monotypic fossil ant genera Fossil taxa described in 1913 {{Dolichoderinae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sicilian Amber
Sicilian refers to the autonomous Italian island of Sicily. Sicilian can also refer to: * Sicilian language, a Romance language spoken on the island of Sicily, its satellite islands, and southern Calabria * Sicilians, people from or with origins in Sicily * Sicilian Defence, a chess opening * ''The Sicilian'', a 1984 novel by Mario Puzo * ''The Sicilian'' (film), a 1987 action film based on the novel See also * * Caecilian, an order of amphibians, occasionally pronounced ''Sicilian'' * Sicily (other) Sicily is a region of Italy comprising the island of the same name. Sicily or Sicilia may also refer to: History * Sicilia (Roman province) * Sicily (theme), the Byzantine province * The Emirate of Sicily, a 10th-century Islamic state * The Kingd ... {{Disambiguation Language and nationality disambiguation pages ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leptomyrmex
A video on how Spider Ant colonies function) ''Leptomyrmex'', or spider ants, is a genus of ants and a distinctive member of the ant subfamily Dolichoderinae. Commonly known as "spider ants" for their long legs and spider-like movements, these orange and black ants are prominent residents of intact wet forest and sclerophyll habitats throughout their range. One extant species, '' Leptomyrmex relictus'', is known from central Brazil; otherwise, the global distribution of this genus is restricted to eastern Australia, New Caledonia and New Guinea, as well as the nearby Indonesian islands of Aru and Seram. Newly hatched '' Extatosoma tiaratum'' stick insects mimic these ants to avoid predation. Workers of ''Leptomyrmex'' can be easily recognized by elongate antennal scapes which surpass the posterior margin of the head by more than one half their length, a medially notched hypostoma, mandibles with 7–15 teeth and 5–12 denticles, and a laterally located anterior tentorial pit. Qu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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