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Ant
Martialinae
Martialinae
Leptanillinae Amblyoponinae Paraponerinae Agroecomyrmecinae Ponerinae Proceratiinae Ecitoninae‡ Aenictinae‡ Dorylini
Dorylini
‡ Aenictogitoninae‡ Cerapachyinae‡* Leptanilloidinae‡ Dolichoderinae Aneuretinae Pseudomyrmecinae Myrmeciinae Ectatomminae Heteroponerinae Myrmicinae
Myrmicinae
Formicinae A phylogeny of the extant ant subfamilies . *Cerapachyinae is paraphyletic ‡ The previous dorylomorph subfamilies were synonymized under Dorylinae by Brady et al
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Cladogram
A CLADOGRAM (from Greek clados "branch" and gramma "character") is a diagram used in cladistics to show relations among organisms. A cladogram is not, however, an evolutionary tree because it does not show how ancestors are related to descendants, nor does it show how much they have changed; many evolutionary trees can be inferred from a single cladogram. A cladogram uses lines that branch off in different directions ending at a clade , a groups of organisms with a last common ancestor . There are many shapes of cladograms but they all have lines that branch off from other lines. The lines can be traced back to where they branch off. These branching off points represent a hypothetical ancestor (not an actual entity) which can be inferred to exhibit the traits shared among the terminal taxa above it. This hypothetical ancestor might then provide clues about the order of evolution of various features, adaptation, and other evolutionary narratives about ancestors
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Type Species
In zoological nomenclature , a TYPE SPECIES (species typica) is the species name with which the name of a genus or subgenus is considered to be permanently taxonomically associated, i.e., the species that contains the biological type specimen(s). A similar concept is used for suprageneric groups called a type genus . In botanical nomenclature , these terms have no formal standing under the code of nomenclature , but are sometimes borrowed from zoological nomenclature. In botany, the type of a genus name is a specimen (or, rarely, an illustration) which is also the type of a species name. The species name that has that type can also be referred to as the type of the genus name. Names of genus and family ranks, the various subdivisions of those ranks, and some higher-rank names based on genus names, have such types. In bacteriology , a type species is assigned for each genus
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Jurassic
The JURASSIC ( /dʒʊˈræsɪk/ ; from Jura Mountains
Jura Mountains
) was a geologic period and system that spanned 56 million years from the end of the Triassic
Triassic
Period 201.3 million years ago (Mya ) to the beginning of the Cretaceous
Cretaceous
Period 145 Mya. The Jurassic
Jurassic
constituted the middle period of the Mesozoic Era , also known as the Age of Reptiles. The start of the period was marked by the major Triassic–Jurassic extinction event . Two other extinction events occurred during the period: the Pliensbachian/ Toarcian event in the Early Jurassic, and the Tithonian event at the end; however, neither event ranks among the "Big Five" mass extinctions
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Cenomanian
The CENOMANIAN is, in the ICS ' geological timescale the oldest or earliest age of the Late Cretaceous
Cretaceous
epoch or the lowest stage of the Upper Cretaceous
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
Cenomanian
age spans the time between 100.5 ± 0.9 Ma and 93.9 ± 0.8 Ma (million years ago). In the geologic timescale it is preceded by the Albian
Albian
and is followed by the Turonian
Turonian
. The Cenomanian
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 US East Coast
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Silurian
The SILURIAN is a geologic period and system spanning 24.6 million years from the end of the Ordovician
Ordovician
Period, at 443.8 million years ago (Mya ), to the beginning of the Devonian
Devonian
Period, 419.2 Mya. As with other geologic periods, the rock beds that define the period's start and end are well identified, but the exact dates are uncertain by several million years. The base of the Silurian
Silurian
is set at a major Ordovician–Silurian extinction events when 60% of marine species were wiped out. A significant evolutionary milestone during the Silurian
Silurian
was the diversification of jawed and bony fish. Multi-cellular life also began to appear on land in the form of small, bryophyte -like and vascular plants that grew beside lakes, streams, and coastlines, and terrestrial arthropods are also first found on land during the Silurian
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Ordovician
The ORDOVICIAN ( /ɔːrdəˈvɪʃən/ ) is a geologic period and system , the second of six periods of the Paleozoic Era . The Ordovician
Ordovician
spans 41.2 million years from the end of the Cambrian Period 485.4 million years ago (Mya) to the start of the Silurian Period 443.8 Mya. The Ordovician, named after the Celtic tribe of the Ordovices , was defined by Charles Lapworth in 1879 to resolve a dispute between followers of Adam Sedgwick
Adam Sedgwick
and Roderick Murchison , who were placing the same rock beds in northern Wales into the Cambrian
Cambrian
and Silurian systems, respectively. Lapworth recognized that the fossil fauna in the disputed strata were different from those of either the Cambrian or the Silurian
Silurian
systems, and placed them in a system of their own
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Cambrian
The CAMBRIAN Period ( /ˈkæmbriən/ or /ˈkeɪmbriən/ ) was the first geological period of the Paleozoic Era, of the Phanerozoic
Phanerozoic
Eon. The Cambrian
Cambrian
lasted 55.6 million years from the end of the preceding Ediacaran
Ediacaran
Period 541 million years ago (mya) to the beginning of the Ordovician
Ordovician
Period 485.4 mya. Its subdivisions, and its base, are somewhat in flux. The period was established (as “Cambrian series”) by Adam Sedgwick , who named it after Cambria , the Latinised form of Cymru, the Welsh name for Wales
Wales
, where Britain's Cambrian
Cambrian
rocks are best exposed
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Triassic
The TRIASSIC ( /traɪˈæsɪk/ ) is a geologic period and system which spans 50.9 million years from the end of the Permian
Permian
Period 251.902 million years ago (Mya ), to the beginning of the Jurassic Period 201.3 Mya . The Triassic
Triassic
is the first period of the Mesozoic Era . Both the start and end of the period are marked by major extinction events . The Triassic
Triassic
began in the wake of the Permian– Triassic
Triassic
extinction event , which left the earth's biosphere impoverished; it would take well into the middle of this period for life to recover its former diversity. Therapsids and archosaurs were the chief terrestrial vertebrates during this time. A specialized subgroup of archosaurs, called dinosaurs , first appeared in the Late Triassic but did not become dominant until the succeeding Jurassic
Jurassic
Period
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Taxonomy (biology)
TAXONOMY (from Ancient Greek τάξις (taxis ), meaning 'arrangement', and -νομία (-nomia), meaning 'method ') is the science of defining and naming groups of biological organisms on the basis of shared characteristics. Organisms are grouped together into taxa (singular: taxon) and these groups are given a taxonomic rank ; groups of a given rank can be aggregated to form a super-group of higher rank, thus creating a taxonomic hierarchy. The principal ranks in modern use are domain , kingdom , phylum (division is sometimes used in botany in place of phylum), class , order , family , genus and species . The Swedish botanist Carl Linnaeus
Carl Linnaeus
is regarded as the father of taxonomy, as he developed a system known as Linnaean taxonomy for categorization of organisms and binomial nomenclature for naming organisms
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Megaannum
A YEAR is the orbital period of the Earth
Earth
moving in its orbit around the Sun
Sun
. Due to the Earth's axial tilt , the course of a year sees the passing of the seasons , marked by changes in weather , the hours of daylight , and, consequently, vegetation and soil fertility . In temperate and subpolar regions around the planet, four seasons are generally recognized: spring , summer , autumn and winter . In tropical and subtropical regions several geographical sectors do not present defined seasons; but in the seasonal tropics , the annual wet and dry seasons are recognized and tracked. The current year is 2018. A calendar year is an approximation of the number of days of the Earth's orbital period as counted in a given calendar . The Gregorian, or modern, calendar , presents its calendar year to be either a common year of 365 days or a leap year of 366 days, as do the Julian calendars ; see below
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Precambrian
The PRECAMBRIAN (or PRE-CAMBRIAN, sometimes abbreviated PЄ, or CRYPTOZOIC) is the earliest part of Earth\'s history , set before the current Phanerozoic
Phanerozoic
Eon. The Precambrian
Precambrian
is so named because it preceded the Cambrian
Cambrian
, the first period of the Phanerozoic
Phanerozoic
eon, which is named after Cambria , the Latinised name for Wales
Wales
, where rocks from this age were first studied. The Precambrian
Precambrian
accounts for 88% of the Earth's geologic time. The Precambrian
Precambrian
(colored green in the timeline figure) is a supereon that is subdivided into three eons (Hadean, Archean, Proterozoic) of the geologic time scale
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Neogene
The NEOGENE ( /ˈniːəˌdʒiːn/ ) (informally UPPER TERTIARY or LATE TERTIARY) is a geologic period and system that spans 20.45 million years from the end of the Paleogene Period 23.03 million years ago (Mya ) to the beginning of the present Quaternary Period 2.58 Mya. The Neogene
Neogene
is sub-divided into two epochs , the earlier Miocene
Miocene
and the later Pliocene
Pliocene
. Some geologists assert that the Neogene
Neogene
cannot be clearly delineated from the modern geological period, the Quaternary . During this period, mammals and birds continued to evolve into roughly modern forms, while other groups of life remained relatively unchanged. Early hominids , the ancestors of humans, appeared in Africa
Africa
near the end of the period
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Devonian
The DEVONIAN is a geologic period and system of the Paleozoic , spanning 60 million years from the end of the Silurian
Silurian
, 419.2 million years ago (Mya), to the beginning of the Carboniferous , 358.9 Mya. It is named after Devon
Devon
, England
England
, where rocks from this period were first studied. The first significant adaptive radiation of life on dry land occurred during the Devonian. Free-sporing vascular plants began to spread across dry land , forming extensive forests which covered the continents . By the middle of the Devonian, several groups of plants had evolved leaves and true roots, and by the end of the period the first seed-bearing plants appeared. Various terrestrial arthropods also became well-established
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Pierre André Latreille
PIERRE ANDRé LATREILLE (29 November 1762 – 6 February 1833) was a French zoologist , specialising in arthropods . Having trained as a Roman Catholic priest before the French Revolution
French Revolution
, Latreille was imprisoned, and only regained his freedom after recognising a rare beetle species he found in the prison, Necrobia ruficollis
Necrobia ruficollis
. He published his first important work in 1796 (Précis des caractères génériques des insectes), and was eventually employed by the Muséum National d\'Histoire Naturelle . His foresighted work on arthropod systematics and taxonomy gained him respect and accolades, including being asked to write the volume on arthropods for George Cuvier 's monumental work, Le Règne Animal , the only part not by Cuvier himself. Latreille was considered the foremost entomologist of his time, and was described by one of his pupils as "the prince of entomologists"
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Permian
The PERMIAN is a geologic period and system which spans 46.7 million years from the end of the Carboniferous
Carboniferous
Period 298.9 million years ago (Mya ), to the beginning of the Triassic
Triassic
period 251.902 Mya. It is the last period of the Paleozoic era; the following Triassic
Triassic
period belongs to the Mesozoic era. The concept of the Permian
Permian
was introduced in 1841 by geologist Sir Roderick Murchison , who named it after the city of Perm
Perm
. The Permian
Permian
witnessed the diversification of the early amniotes into the ancestral groups of the mammals , turtles , lepidosaurs , and archosaurs
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