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Ant
MartialinaeLeptanillinaeAmblyoponinaeParaponerinaeAgroecomyrmecinaePonerinaeProceratiinaeEcitoninae‡Aenictinae‡Dorylini‡Aenictogitoninae‡Cerapachyinae‡*Leptanilloidinae‡DolichoderinaeAneuretinaePseudomyrmecinaeMyrmeciinaeEctatomminaeHeteroponerinaeMyrmicinaeFormicinaeA phylogeny of the extant ant subfamilies.[2][3] *Cerapachyinae is paraphyletic ‡ The previous dorylomorph subfamilies were synonymized under Dorylinae
Dorylinae
by Brady et al. in 2014[4]Ants are eusocial insects of the family Formicidae and, along with the related wasps and bees, belong to the order Hymenoptera. Ants evolved from wasp-like ancestors in the Cretaceous
Cretaceous
period, about 140 million years ago, and diversified after the rise of flowering plants
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Jurassic
The Jurassic
Jurassic
( /dʒʊˈræsɪk/; from 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.[note 1] The Jurassic
Jurassic
constituted the middle period of the Mesozoic
Mesozoic
Era, also known as the Age of Reptiles. The start of the period was marked by the major Triassic–Jurassic extinction event
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Cambrian
The Cambrian
Cambrian
Period ( /ˈkæmbriən/ or /ˈkeɪmbriən/) was the first geological period of the Paleozoic
Paleozoic
Era, of the Phanerozoic
Phanerozoic
Eon.[6] 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.[7] Its subdivisions, and its base, are somewhat in flux
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Ordovician
The Ordovician
Ordovician
( /ɔːrdəˈvɪʃən/) is a geologic period and system, the second of six periods of the Paleozoic
Paleozoic
Era
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Silurian
The Silurian
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.[8] 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 series of major Ordovician–Silurian extinction events
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
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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.[1][2][3][4][5] A cladogram uses lines that branch off in different directions ending at a clade, a group 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.[4][6] 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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Berriasian
In the geological timescale, the Berriasian
Berriasian
is an age or stage of the Early Cretaceous. It is the oldest, or lowest, subdivision in the entire Cretaceous. It spanned the time between 145.0 ± 4.0 Ma and 139.8 ± 3.0 Ma (million years ago). The Berriasian
Berriasian
succeeds the Tithonian
Tithonian
(part of the Jurassic) and precedes the Valanginian.[2]Contents1 Stratigraphic definition 2 Palaeontology2.1 Birds
Birds
(avian theropods) 2.2 Crocodylomorphs
Crocodylomorphs
(Non-Thalattosuchian) 2.3 Mammalia 2.4 †Ornithischians 2.5 †Pterosaurs 2.6 †Sauropods 2.7 †Thalattosuchia 2.8 †Theropods (non-avian)3 References3.1 Notes 3.2 Literature4 External linksStratigraphic definition[edit] The Berriasian
Berriasian
Stage was introduced in scientific literature by Henri Coquand in 1869
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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).[1] 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
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Triassic
The Triassic
Triassic
( /traɪˈæsɪk/) is a geologic period and system which spans 50.9 million years from the end of the Permian
Permian
Period 251.9 million years ago (Mya), to the beginning of the Jurassic
Jurassic
Period 201.3 Mya.[8] The Triassic
Triassic
is the first period of the Mesozoic
Mesozoic
Era. Both the start and end of the period are marked by major extinction events.[9] 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
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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
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Neogene
The Neogene
Neogene
( /ˈniːəˌdʒiːn/)[6][7] (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
Quaternary
Period 2.58 Mya. The Neogene
Neogene
is sub-divided into two epochs, the earlier Miocene
Miocene
and the later 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 near the end of the period
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Megaannum
A year is the orbital period of the Earth
Earth
moving in its orbit around the 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
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, the first period of the Phanerozoic
Phanerozoic
eon, which is named after Cambria, the Latinised name for 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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Devonian
The Devonian
Devonian
is a geologic period and system of the Paleozoic, spanning 60 million years from the end of the Silurian, 419.2 million years ago (Mya), to the beginning of the Carboniferous, 358.9 Mya.[9] It is named after Devon, 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. Fish
Fish
reached substantial diversity during this time, leading the Devonian
Devonian
to often be dubbed the "Age of Fish"
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Permian
The Permian
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
Paleozoic
era; the following Triassic
Triassic
period belongs to the Mesozoic
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. The Permian
Permian
witnessed the diversification of the early amniotes into the ancestral groups of the mammals, turtles, lepidosaurs, and archosaurs. The world at the time was dominated by two continents known as Pangaea
Pangaea
and Siberia, surrounded by a global ocean called Panthalassa
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Pierre André Latreille
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, Latreille was imprisoned, and only regained his freedom after recognising a rare beetle species he found in the prison, 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
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