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Haidomyrmecinae
Haidomyrmecinae, occasionally called Hell ants, are an extinct subfamily of ants (Formicidae) known from Cretaceous fossils found in ambers of North America, Europe, and Asia, spanning the late Albian to Campanian, around 100 to 79 million years ago. The subfamily was first proposed in 2003, but had been subsequently treated as the tribe Haidomyrmecini and placed in the extinct ant subfamily Sphecomyrminae. Reevaluation of Haidomyrmecini in 2020 lead to the elevation of the group back to subfamily. The family contains the nine genera and thirteen species. Members of this family are highly distinct from all other ants, having diverse head ornamentation, and unusually shaped, extended mandibles that articulated vertically rather than horizontally as in modern ants. The jaws in combination with the head ornamentation served to restrain prey, with most species having setae (hair-like structures) covering parts of the head which likely functioned as triggers to rapidly close the jaw wh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Haidomyrmecinae
Haidomyrmecinae, occasionally called Hell ants, are an extinct subfamily of ants (Formicidae) known from Cretaceous fossils found in ambers of North America, Europe, and Asia, spanning the late Albian to Campanian, around 100 to 79 million years ago. The subfamily was first proposed in 2003, but had been subsequently treated as the tribe Haidomyrmecini and placed in the extinct ant subfamily Sphecomyrminae. Reevaluation of Haidomyrmecini in 2020 lead to the elevation of the group back to subfamily. The family contains the nine genera and thirteen species. Members of this family are highly distinct from all other ants, having diverse head ornamentation, and unusually shaped, extended mandibles that articulated vertically rather than horizontally as in modern ants. The jaws in combination with the head ornamentation served to restrain prey, with most species having setae (hair-like structures) covering parts of the head which likely functioned as triggers to rapidly close the jaw wh ... [...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] |
Haidomyrmex Zigrasi JZ01 01
''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] |
Linguamyrmex
''Linguamyrmex'' is an extinct genus of ant in the formicid subfamily Haidomyrmecinae, and is one of only nine genera placed in the subfamily Haidomyrmecinae. The genus contains three described species, ''Linguamyrmex brevicornis'', ''Linguamyrmex rhinocerus'', and the type species ''Linguamyrmex vladi'' all known from Late Cretaceous fossils found in Asia. History and classification ''Linguamyrmex'' is known from a total of four adult fossils. The holotype is specimen number "AMNH BuPH-01" from the American Museum of Natural History; the other three specimens described are also in the same collection, but were not placed as members of ''L. vladi''. 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 m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Haidomyrmodes
''Haidomyrmodes'' is an extinct genus of ant in the formicid subfamily Haidomyrmecinae, and is one of only nine genera placed in the subfamily Haidomyrmecinae. The genus contains a single described species, ''Haidomyrmodes mammuthus''. ''Haidomyrmodes'' is known from several Middle Cretaceous fossils which have been found in Europe. History and classification ''Haidomyrmodes'' is known from a group of three fossils, the holotype, specimen number "MNHN ARC 50.2", and the paratypes "MNHN ARC 242" and "MNHN AIX 1.2". All three specimens are housed in the fossil collections of the Department of Earth History, Muséum national d'histoire naturelle, Paris, France. The holotype specimen is composed of a mostly complete winged adult female, while the paratypes are both of incomplete worker caste members. All of the specimens are preserved as inclusions in transparent chunks of Late Albian to Early Cenomanian Charentese amber found in the Charente-Maritime area of France. The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Haidoterminus
''Haidoterminus'' is an extinct genus of ant in the Formicidae subfamily Haidomyrmecinae, and is one of only nine genera placed in this subfamily. The genus contains a single described species ''Haidoterminus cippus'' and is known from one Late Cretaceous fossil which has been found in North America. History and classification ''Haidoterminus'' is known from a solitary adult fossil, the holotype, specimen number "UASM 332546" donated for study by Mark Elaschuk. At the time of description, the specimen was residing in the Strickland Entomology Museum, part of the University of Alberta. The holotype specimen is composed of a mostly complete worker caste adult female which has been preserved as an inclusion in a transparent chunk of clear yellow Canadian amber. The amber specimen was recovered from deposits of the Foremost Formation near Grassy Lake, Alberta, Canada. Canadian amber has been dated to an age of approximately 79–78 million years old, placing it in the Campanian of t ... [...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] |
Sphecomyrminae
Sphecomyrminae is an extinct subfamily of ants in family Formicidae known from a series of Cretaceous fossils found in North America, Europe, and Asia. Sphecomyrminae contains eight genera, divided into two tribes Sphecomyrmini and Zigrasimeciini. The tribe Sphecomyrmini contains the six genera '' Armania'', '' Cretomyrma'', ''Gerontoformica'', '' Orapia'', '' Pseudarmania'' and ''Sphecomyrma''; while Zigrasimeciini contains ''Boltonimecia'' and ''Zigrasimecia''. A number of taxa have been removed from the subfamily and placed either in other subfamilies or are now treated as ''incertae sedis'' in Formicidae. Sphecomyrminae is the most basal of the Formicidae subfamilies, but has not been included in several phylogenetic studies of the family. Symplesiomorphies of the subfamily include the structure of the antenna, which has a short basal segment and a flexible group of segments below the antenna tip. The petiole is low and rounded, with an unrestricted gaster and the presence of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Albian
The Albian is both an age of the geologic timescale and a stage in the stratigraphic column. It is the youngest or uppermost subdivision of the Early/Lower Cretaceous Epoch/Series. Its approximate time range is 113.0 ± 1.0 Ma to 100.5 ± 0.9 Ma (million years ago). The Albian is preceded by the Aptian and followed by the Cenomanian. Stratigraphic definitions The Albian Stage was first proposed in 1842 by Alcide d'Orbigny. It was named after Alba, the Latin name for River Aube in France. A Global Boundary Stratotype Section and Point (GSSP), ratified by the IUGS in 2016, defines the base of the Albian as the first occurrence of the planktonic foraminiferan '' Microhedbergella renilaevis'' at the Col de Pré-Guittard section, Arnayon, Drôme, France. The top of the Albian Stage (the base of the Cenomanian Stage and Upper Cretaceous Series) is defined as the place where the foram species '' Rotalipora globotruncanoides'' first appears in the stratigraphic column. The Albia ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
