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Camelomecia
''Camelomecia'' is an extinct genus of stem-group ants not placed into any Formicidae subfamily. Fossils of the single known species, ''Camelomecia janovitzi'', are known from the Middle Cretaceous of Asia. The genus is one of several ants described from Middle Cretaceous ambers of Myanmar. History and classification ''Camelomecia'' is known from three total adult fossils, the holotype, specimen number "AMNH Bu-TJ003", and two additional fragmentary adults not designated as paratypes. At the time of the genus description, the three specimens were residing in the American Museum of Natural History, in New York City. The described specimens are of queen and drone caste adults which have been preserved as inclusions in transparent chunks of Burmese amber. The amber specimens were recovered from deposits in Kachin State, in Myanmar. Burmese amber has been radiometrically dated using U- Pb isotopes, yielding an age of approximately 98.79 ± 0.62 million years old, close t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Camelomecia Janovitzi AMNH-BUTJ003 Head Profile
''Camelomecia'' is an extinct genus of stem-group ants not placed into any Formicidae subfamily. Fossils of the single known species, ''Camelomecia janovitzi'', are known from the Middle Cretaceous of Asia. The genus is one of several ants described from Middle Cretaceous ambers of Myanmar. History and classification ''Camelomecia'' is known from three total adult fossils, the holotype, specimen number "AMNH Bu-TJ003", and two additional fragmentary adults not designated as paratypes. At the time of the genus description, the three specimens were residing in the American Museum of Natural History, in New York City. The described specimens are of queen and drone caste adults which have been preserved as inclusions in transparent chunks of Burmese amber. The amber specimens were recovered from deposits in Kachin State, in Myanmar. Burmese amber has been radiometrically dated using U- Pb isotopes, yielding an age of approximately 98.79 ± 0.62 million years old, clos ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zigrasimecia Ferox JWJ-Bu17 Profile View
''Zigrasimecia'' is an extinct genus of ants which existed in the Cretaceous period approximately 98 million years ago. The first specimens were collected from Burmese amber in Kachin State, west of Myitkyina town in Myanmar. In 2013, palaeoentomologists Phillip Barden and David Grimaldi published a paper describing and naming ''Zigrasimecia tonsora''. They described a dealate female with unusual features, notably the highly specialized mandibles. Other features include large ocelli, short scapes, 12 antennomeres, small eyes, and a clypeal margin that has a row of peg-like denticles. The genus ''Zigrasimecia'' was originally '' incertae sedis'' (uncertain placement) within Formicidae until a second species, ''Zigrasimecia ferox'', was described in 2014, leading to its placement in the subfamily Sphecomyrminae. Later, it was considered to belong to the distinct subfamily Zigrasimeciinae. Due to the highly specialized mandibles, scientists believe that the ants exhibited hab ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zigrasimecia
''Zigrasimecia'' is an extinct genus of ants which existed in the Cretaceous period approximately 98 million years ago. The first specimens were collected from Burmese amber in Kachin State, west of Myitkyina town in Myanmar. In 2013, palaeoentomologists Phillip Barden and David Grimaldi published a paper describing and naming ''Zigrasimecia tonsora''. They described a dealate female with unusual features, notably the highly specialized mandibles. Other features include large ocelli, short scapes, 12 antennomeres, small eyes, and a clypeal margin that has a row of peg-like denticles. The genus ''Zigrasimecia'' was originally ''incertae sedis'' (uncertain placement) within Formicidae until a second species, ''Zigrasimecia ferox'', was described in 2014, leading to its placement in the subfamily Sphecomyrminae. Later, it was considered to belong to the distinct subfamily Zigrasimeciinae. Due to the highly specialized mandibles, scientists believe that the ants exhibited habit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gerontoformica
''Gerontoformica'' is an extinct genus of stem-group ants. The genus contains thirteen described species known from Late Cretaceous fossils found in Asia and Europe. The species were described between 2004 and 2016, with a number of the species formerly being placed into the junior synonym genus ''Sphecomyrmodes''. History and classification ''Gerontoformica'' is known from over thirty adult fossil specimens which are composed of complete adult female workers and queens. The first fossil was discovered preserved as an inclusion in a transparent chunk of Charentese amber. The amber is thought to have been formed from resins of the extinct Pinales tree family Cheirolepidiaceae and possibly from the living family Araucariaceae. Paleoecology of the ambers indicates the shore to mangrove type forests were of a subtropical to warm temperate climate, with occasional dry periods The ambers are recovered from deposits exposed in quarries, road constructions, and beach exposures in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ceratomyrmex
''Ceratomyrmex'' is an extinct genus of ant in the Formicidae subfamily Haidomyrmecinae. The genus contains a single described species ''Ceratomyrmex ellenbergeri'' and is known from several Late Cretaceous fossils which have been found in Asia. History and classification ''Ceratomyrmex'' is known from a total of four adult fossils. The holotype is specimen number "NIGP164022" of the Nanjing Institute of Geology and Paleontology; the adult specimen "IGR.BU-002" of the University of Rennes is designated as paratype. The two additional specimens described but not designated as paratypes were residing in the private collection of Sieghard Ellenberger, Germany. The described specimens are of worker caste adults which have been preserved as inclusions in transparent chunks of Burmese amber. The amber specimens were recovered from deposits in Kachin State, in Myanmar. Burmese amber has been radiometrically dated using U- Pb isotopes, yielding an age of approximately 98.79 ± 0.62 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Burmese Amber
Burmese amber, also known as Burmite or Kachin amber, is amber from the Hukawng Valley in northern Myanmar. The amber is dated to around 100 million years ago, during the latest Albian to earliest Cenomanian ages of the mid-Cretaceous period. The amber is of significant palaeontological interest due to the diversity of flora and fauna contained as inclusions, particularly arthropods including insects and arachnids but also birds, lizards, snakes, frogs and fragmentary dinosaur remains. The amber has been known and commercially exploited since the first century AD, and has been known to science since the mid-nineteenth century. Research on the deposit has attracted controversy due to its alleged role in funding internal conflict in Myanmar and hazardous working conditions in the mines where it is collected. Geological context, depositional environment and age The amber is found within the Hukawng Basin, a large Cretaceous-Cenozoic sedimentary basin within northern Myanmar. The s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cenomanian
The Cenomanian is, in the ICS' geological timescale, the oldest or earliest age of the Late Cretaceous Epoch or the lowest stage of the Upper Cretaceous Series. An age is a unit of geochronology; it is a unit of time; the stage is a unit in the stratigraphic column deposited during the corresponding age. Both age and stage bear the same name. As a unit of geologic time measure, the Cenomanian Age spans the time between 100.5 and 93.9 million years ago (Mya). In the geologic timescale, it is preceded by the Albian and is followed by the Turonian. The Upper Cenomanian starts around at 95 Mya. The Cenomanian is coeval with the Woodbinian of the regional timescale of the Gulf of Mexico and the early part of the Eaglefordian of the regional timescale of the East Coast of the United States. At the end of the Cenomanian, an anoxic event took place, called the Cenomanian-Turonian boundary event or the "Bonarelli event", that is associated with a minor extinction event for marine spec ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aptian
The Aptian is an age in the geologic timescale or a stage in the stratigraphic column. It is a subdivision of the Early or Lower Cretaceous Epoch or Series and encompasses the time from 121.4 ± 1.0 Ma to 113.0 ± 1.0 Ma (million years ago), approximately. The Aptian succeeds the Barremian and precedes the Albian, all part of the Lower/Early Cretaceous. The Aptian partly overlaps the upper part of the Western European Urgonian Stage. The Selli Event, also known as OAE1a, was one of two oceanic anoxic events in the Cretaceous Period, which occurred around 120 Ma and lasted approximately 1 to 1.3 million years. The Aptian extinction was a minor extinction event hypothesized to have occurred around 116 to 117 Ma.Archangelsky, Sergio.The Ticó Flora (Patagonia) and the Aptian Extinction Event" ''Acta Paleobotanica'' 41(2), 2001, pp. 115-22. Stratigraphic definitions The Aptian was named after the small city of Apt in the Provence region of France, which is also known for its cry ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sphecomyrma Freyi AMNH-NJ943B
''Sphecomyrma'' is an extinct genus of ants which existed in the Cretaceous approximately 79 to 92 million years ago. The first specimens were collected in 1966, found embedded in amber which had been exposed in the cliffs of Cliffwood, New Jersey, by Edmund Frey and his wife. In 1967, zoologists E. O. Wilson, Frank Carpenter and William L. Brown, Jr. published a paper describing and naming ''Sphecomyrma freyi''. They described an ant with a mosaic of features—a mix of characteristics from modern ants and aculeate wasps. It possessed a metapleural gland, a feature unique to ants. Furthermore, it was wingless and had a petiole which was ant-like in form. The mandibles were short and wasp-like with only two teeth, the gaster was constricted, and the middle and hind legs had double tibial spurs. The antennae were, in form, midway between the wasps and ants, having a short first segment but a long flexible funiculus. Two additional species, ''S. canadensis'' and ''S. mesa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sphecomyrma
''Sphecomyrma'' is an extinct genus of ants which existed in the Cretaceous approximately 79 to 92 million years ago. The first specimens were collected in 1966, found embedded in amber which had been exposed in the cliffs of Cliffwood, New Jersey, by Edmund Frey and his wife. In 1967, zoologists E. O. Wilson, Frank Carpenter and William L. Brown, Jr. published a paper describing and naming ''Sphecomyrma freyi''. They described an ant with a mosaic of features—a mix of characteristics from modern ants and aculeate wasps. It possessed a metapleural gland, a feature unique to ants. Furthermore, it was wingless and had a petiole which was ant-like in form. The mandibles were short and wasp-like with only two teeth, the gaster was constricted, and the middle and hind legs had double tibial spurs. The antennae were, in form, midway between the wasps and ants, having a short first segment but a long flexible funiculus. Two additional species, ''S. canadensis'' and ''S. mesaki' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Myanmyrma
''Myanmyrma'' is an extinct genus of ants not placed into any Formicidae subfamily. Fossils of the single known species, ''Myanmyrma gracilis'', are known from the Middle Cretaceous of Asia. The genus is one of several ants described from Middle Cretaceous ambers of Myanmar. History and classification ''Myanmyrma'' is known from three total adult fossils, the holotype, specimen number "AMNH Bu-014", and two additional fragmentary adults not designated as paratypes. At the time of the genus description, the three specimens were residing in the American Museum of Natural History, in New York City. All the described specimens are of worker caste adult females which have been preserved as inclusions in transparent chunks of Burmese amber. The amber specimen was recovered from deposits in Kachin State, west of Myitkyina in Myanmar. Burmese amber has been radiometrically dated using U- Pb isotopes, yielding an age of approximately 98.79 ± 0.62 million years old, close to t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Haidomyrmex
''Haidomyrmex'' is an extinct genus of ants in the formicid subfamily Haidomyrmecinae, and is one of nine genera placed in the subfamily Haidomyrmecinae. The genus contains three described species ''Haidomyrmex cerberus'', ''Haidomyrmex scimitarus'', and ''Haidomyrmex zigrasi''. All three are known from single Late Cretaceous fossils which have been found in Asia. ''H. cerberus'' is the type species and ''Haidomyrmex'' the type genus for the subfamily Haidomyrmecinae. History and classification ''Haidomyrmex,'' is known from three solitary adult fossil specimens which are composed of mostly complete adult females which have been preserved as an inclusions in transparent chunk of Burmese amber. The amber specimens entombing ''H. scimitarus'', and ''H. zigrasi'' were recovered from deposits in Kachin State, west of Myitkyna town in Myanmar. In contrast, type specimen of ''H. cerberus'' was collected in the early 1900s from an unspecified location in Myanmar. Burmese amber ha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
