|
Agroecomyrmecinae
Agroecomyrmecinae is a subfamily of ants containing two extant and two fossil genera. The subfamily was originally classified in 1930 by Frank M. Carpenter as Agroecomyrmecini, a Myrmicinae tribe. Barry Bolton, Bolton raised the tribe to subfamily status in 2003, suggesting that Agroecomyrmecinae might be the sister taxon to Myrmicinae. It has since been discovered to be one of the earliest lineages of ants, a clade from the Basal (phylogenetics), basal polytomy for all ants. In 2014, the subfamily was expanded to two tribes. The tribe Ankylomyrmini was moved from the subfamily Myrmicinae to Agroemyrmecinae. Tribes and genera *Agroecomyrmecinae Carpenter, 1930 ** Agroecomyrmecini Carpenter, 1930 *** †''Agroecomyrmex'' Wheeler, 1910 **** †''Agroecomyrmex, Agroecomyrmex duisburgi'' Wheeler, 1910 *** †''Eulithomyrmex'' Carpenter, 1935 ****†''Eulithomyrmex rugosus'' Carpenter, 1930 ****†''Eulithomyrmex striatus'' Carpenter, 1930 *** ''Tatuidris'' Brown & Kempf, 1968 **** '' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tatuidris Tatusia
''Tatuidris'', or armadillo ant, is a rare genus of ants consisting of a single species, ''Tatuidris tatusia''. The ants are small in size and inhabit the leaf litter of Neotropical forests in Central and South America, from Mexico to Brazil. Workers are ferruginous-colored to dark red and present a distinctive morphology, consisting of a shield-like head with a broad vertex, ventrally-turned heavy mandibles which do not overlap at full closure, and unique among ants – an antenna socket apparatus sitting upside-down. Little is known about the biology of the ants, but they are likely nocturnal and specialist predators. ''Tatuidris'' was first described in 1968 and initially placed in the myrmicine tribe Agroecomyrmecini, together with two fossil genera. Since the original description, the systematic status of the tribe has been the focus of debate. Taxonomy ''Tatuidris tatusia'' is the only species in ''Tatuidris'', a monotypic genus and one of only two extant g ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eulithomyrmex
''Eulithomyrmex'' is an extinct genus of ant in the formicid subfamily Agroecomyrmecinae. The genus contains two described species, ''Eulithomyrmex rugosus'' and ''Eulithomyrmex striatus''. ''Eulithomyrmex'' is known from a group of Late Eocene fossils which were found in North America. History and classification When described the genus ''Eulithomyrmex'' was known from over forty separate fossils preserved as impressions in fine shales of the Florissant formation in Colorado. The formation is composed of successive lake deposits which have preserved a diverse assemblage of insects. The insects and plants suggest a climate similar to modern Southeastern North America, with a number of taxa represented that are now found in the subtropics to tropics and confined to the Old World. When ''Eulithomyrmex'' was described, the Florissant formation was considered to be Miocene in age, based on the flora and fauna preserved. Successive research and fossil descriptions moved the age ol ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Agroecomyrmex
''Agroecomyrmex'' is an extinct genus of ants in the formicid subfamily Agroecomyrmecinae, for which it is the type genus. The genus contains a single described species, ''Agroecomyrmex duisburgi''. ''Agroecomyrmex'' is known from a group of Middle Eocene fossils which were found in Europe. History and classification When described ''Agroecomyrmex'' was known only from five separate fossils, the holotype worker, number 639/10246 plus three paratype workers and a single paratype female, which are fossilized as inclusions in transparent chunks of Baltic amber. Baltic amber is approximately forty six million years old, having been deposited during Lutetian stage of the Middle Eocene. There is debate on what plant family the amber was produced by, with evidence supporting relatives of either an '' Agathis'' relative or a '' Pseudolarix'' relative. All the type specimens were collected over 125 years ago, and when first described were part of the University of Königsberg ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ankylomyrma
''Ankylomyrma'', from Ancient Greek ἀγκύλος (''ankúlos''), meaning "curved", and μύρμηξ (''múrmēx''), meaning "ant", is a genus of large arboreal ants in the subfamily Agroecomyrmecinae. It contains the single species ''Ankylomyrma coronacantha'', the sole member of the tribe Ankylomyrmini. The genus is known from Africa Africa is the world's second-largest and second-most populous continent after Asia. At about 30.3 million km2 (11.7 million square miles) including adjacent islands, it covers 20% of Earth's land area and 6% of its total surfac .... Nothing is known about their biology. The genus was moved from the subfamily Myrmicinae to Agroecomyrmecinae in 2014. References External links * Agroecomyrmecinae Monotypic ant genera Hymenoptera of Africa Taxa named by Barry Bolton {{ant-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tergum
A ''tergum'' (Latin for "the back"; : ''terga'', associated adjective tergal) is the dorsal ('upper') portion of an arthropod Arthropods ( ) are invertebrates in the phylum Arthropoda. They possess an arthropod exoskeleton, exoskeleton with a cuticle made of chitin, often Mineralization (biology), mineralised with calcium carbonate, a body with differentiated (Metam ... segment other than the head. The anterior edge is called the 'base' and posterior edge is called the 'apex' or 'margin'. A given tergum may be divided into hardened plates or sclerites commonly referred to as tergites. In a thoracic segment, for example, the tergum may be divided into an anterior notum and a posterior scutellum. Lateral extensions of a tergite are known as paranota (Greek for "alongside the back") or ''carinae'' (Latin for "keel"), exemplified by the flat-backed millipedes of the order Polydesmida. Kinorhynchs have tergal and sternal plates too, though seemingly not homologous with ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Autapomorphy
In phylogenetics, an autapomorphy is a distinctive feature, known as a Synapomorphy, derived trait, that is unique to a given taxon. That is, it is found only in one taxon, but not found in any others or Outgroup (cladistics), outgroup taxa, not even those most closely related to the focal taxon (which may be a species, family (biology), family or in general any clade). It can therefore be considered as an apomorphy in relation to a single taxon. The word ''autapomorphy'', introduced in 1950 by German entomology, entomologist Willi Hennig, is derived from the Greek language, Greek words αὐτός, ''autos'' "self"; ἀπό, ''apo'' "away from"; and μορφή, ''morphḗ'' = "shape". Discussion Because autapomorphies are only present in a single taxon, they do not convey information about relationship. Therefore, autapomorphies are not useful to infer phylogenetic relationships. However, autapomorphy, like synapomorphy and plesiomorphy is a relative concept depending on the ta ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Basicerotini
Fungus-growing ants (tribe Attini) comprise all the known fungus-growing ant species participating in ant–fungus mutualism. They are known for cutting grasses and leaves, carrying them to their colonies' nests, and using them to grow fungus on which they later feed. Their farming habits typically have large effects on their surrounding ecosystem. Many species farm large areas surrounding their colonies and leave walking trails that compress the soil, which can no longer grow plants. Attine colonies commonly have millions of individuals, though some species only house a few hundred. They are the sister group to the subtribe Dacetina. Leafcutter ants, including ''Atta (genus), Atta'' and ''Acromyrmex'', make up two of the genera. Their cultivars mostly come from the fungal tribe Leucocoprinus, Leucocoprineae of family Agaricaceae. Attine gut microbiota is often not diverse due to their primarily monotonous diets, leaving them at a higher risk than other beings for certain illnes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sternum
The sternum (: sternums or sterna) or breastbone is a long flat bone located in the central part of the chest. It connects to the ribs via cartilage and forms the front of the rib cage, thus helping to protect the heart, lungs, and major blood vessels from injury. Shaped roughly like a necktie, it is one of the largest and longest flat bones of the body. Its three regions are the manubrium, the body, and the xiphoid process. The word ''sternum'' originates from Ancient Greek στέρνον (''stérnon'') 'chest'. Structure The sternum is a narrow, flat bone, forming the middle portion of the front of the chest. The top of the sternum supports the clavicles (collarbones) and its edges join with the costal cartilages of the first two pairs of ribs. The inner surface of the sternum is also the attachment of the sternopericardial ligaments. Its top is also connected to the sternocleidomastoid muscle. The sternum consists of three main parts, listed from the top: * Man ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phylogenetic
In biology, phylogenetics () is the study of the evolutionary history of life using observable characteristics of organisms (or genes), which is known as phylogenetic inference. It infers the relationship among organisms based on empirical data and observed heritable traits of DNA sequences, protein amino acid sequences, and morphology. The results are a phylogenetic tree—a diagram depicting the hypothetical relationships among the organisms, reflecting their inferred evolutionary history. The tips of a phylogenetic tree represent the observed entities, which can be living taxa or fossils. A phylogenetic diagram can be rooted or unrooted. A rooted tree diagram indicates the hypothetical common ancestor of the taxa represented on the tree. An unrooted tree diagram (a network) makes no assumption about directionality of character state transformation, and does not show the origin or "root" of the taxa in question. In addition to their use for inferring phylogenetic pa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
