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Orthoptera () is an
order Order, ORDER or Orders may refer to: * Categorization, the process in which ideas and objects are recognized, differentiated, and understood * Heterarchy, a system of organization wherein the elements have the potential to be ranked a number of d ...
of
insect Insects (from Latin ') are pancrustacean hexapod invertebrates of the class Insecta. They are the largest group within the arthropod phylum. Insects have a chitinous exoskeleton, a three-part body ( head, thorax and abdomen), three pairs ...
s that comprises the
grasshopper Grasshoppers are a group of insects belonging to the suborder Caelifera. They are among what is possibly the most ancient living group of chewing herbivorous insects, dating back to the early Triassic around 250 million years ago. Grasshopp ...
s, locusts, and
cricket Cricket is a bat-and-ball game played between two teams of eleven players on a field at the centre of which is a pitch with a wicket at each end, each comprising two bails balanced on three stumps. The batting side scores runs by striki ...
s, including closely related insects, such as the bush crickets or katydids and wētā. The order is subdivided into two suborders: Caelifera – grasshoppers, locusts, and close relatives; and Ensifera – crickets and close relatives. More than 20,000
species In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of the appropriate s ...
are distributed worldwide. The insects in the order have incomplete metamorphosis, and produce
sound In physics, sound is a vibration that propagates as an acoustic wave, through a transmission medium such as a gas, liquid or solid. In human physiology and psychology, sound is the ''reception'' of such waves and their ''perception'' by the ...
(known as a " stridulation") by rubbing their wings against each other or their legs, the wings or legs containing rows of corrugated bumps. The tympanum, or ear, is located in the front
tibia The tibia (; ), also known as the shinbone or shankbone, is the larger, stronger, and anterior (frontal) of the two bones in the leg below the knee in vertebrates (the other being the fibula, behind and to the outside of the tibia); it connects ...
in crickets, mole crickets, and bush crickets or katydids, and on the first abdominal segment in the grasshoppers and locusts. These organisms use vibrations to locate other individuals. Grasshoppers and other orthopterans are able to fold their wings (i.e. they are members of Neoptera).


Etymology

The name is derived from the Greek ὀρθός ''orthos'' meaning "straight" and πτερόν ''pteron'' meaning "wing".


Characteristics

Orthopterans have a generally
cylindrical A cylinder (from ) has traditionally been a three-dimensional solid, one of the most basic of curvilinear geometric shapes. In elementary geometry, it is considered a prism with a circle as its base. A cylinder may also be defined as an infini ...
body, with elongated hindlegs and musculature adapted for jumping. They have mandibulate mouthparts for biting and chewing and large compound eyes, and may or may not have ocelli, depending on the species. The antennae have multiple joints and filiform type, and are of variable length. The first and third segments on the
thorax The thorax or chest is a part of the anatomy of humans, mammals, and other tetrapod animals located between the neck and the abdomen. In insects, crustaceans, and the extinct trilobites, the thorax is one of the three main divisions of the cre ...
are larger, while the second segment is much smaller. They have two pairs of wings, which are held overlapping the
abdomen The abdomen (colloquially called the belly, tummy, midriff, tucky or stomach) is the part of the body between the thorax (chest) and pelvis, in humans and in other vertebrates. The abdomen is the front part of the abdominal segment of the torso. ...
at rest. The forewings, or tegmina, are narrower than the hindwings and hardened at the base, while the hindwings are membranous, with straight veins and numerous cross-veins. At rest, the hindwings are held folded fan-like under the forewings. The final two to three segments of the abdomen are reduced, and have single-segmented cerci.


Life cycle

Orthopterans have a paurometabolous lifecycle or incomplete metamorphosis. The use of sound is generally crucial in courtship, and most species have distinct songs. Most grasshoppers lay their eggs in the ground or on vegetation. The eggs hatch and the young nymphs resemble adults, but lack wings and at this stage are often called 'hoppers'. They may often also have a radically different coloration from the adults. Through successive moults, the nymphs develop wings until their final moult into a mature adult with fully developed wings. The number of moults varies between species; growth is also very variable and may take a few weeks to some months depending on food availability and weather conditions.


Evolution

This order evolved with a division into two suborders - Caelifera and Ensifera - occurring .Chang H, Qiu Z, Yuan H, Wang X, Li X, Sun H, Guo X, Lu Y, Feng X, Majid M, Huang Y (2020) Evolutionary rates of and selective constraints on the mitochondrial genomes of Orthoptera insects with different wing types. Mol Phylogenet Evol


Phylogeny

The Orthoptera are divided into two suborders, Caelifera and Ensifera, that have been shown to be
monophyletic In cladistics for a group of organisms, monophyly is the condition of being a clade—that is, a group of taxa composed only of a common ancestor (or more precisely an ancestral population) and all of its lineal descendants. Monophyletic gro ...
.Zhou Z, Ye H, Huang Y, Shi F. (2010) The phylogeny of Orthoptera inferred from mtDNA and description of ''Elimaea cheni'' (Tettigoniidae: Phaneropterinae) mitogenome. ''J. Genet. Genomics.'' 37(5):315-324


Taxonomy

Taxonomists classify members of the Caelifera and Ensifera into infraorders and superfamilies as follows: * Suborder Caelifera – grasshoppers, pygmy mole crickets and allies ** Infraorder Acrididea *** Superfamily Acridoidea – grasshoppers, locusts *** Superfamily Eumastacoidea – monkey or matchstick grasshoppers and allies *** Superfamily Locustopsoidea† *** Superfamily Pneumoroidea – bladder grasshoppers *** Superfamily Pyrgomorphoidea – gaudy grasshoppers *** Superfamily Tanaoceroidea – desert long-horned grasshoppers *** Superfamily Tetrigoidea – ground-hoppers or grouse locusts *** Superfamily Trigonopterygoidea – leaf grasshoppers ** Infraorder
Tridactylidea The infraorder Tridactylidea has a single extant superfamily which includes pygmy mole crickets; they are thought to represent living representatives of the most basal Caelifera: the Orthopteran suborder that includes grasshoppers. Superfami ...
*** Superfamily Dzhajloutshelloidea† *** Superfamily Regiatoidea† *** Superfamily
Tridactyloidea Tridactyloidea is a superfamily in the order Orthoptera. The insects are sometimes known as pygmy mole crickets but they are Caelifera and not members of the mole cricket suborder Ensifera, unlike the true mole crickets, the Gryllotalpidae ...
– pygmy mole crickets and allies * Suborder Ensifera – crickets ** Superfamily Grylloidea – crickets, mole crickets ** Superfamily
Hagloidea The superfamily Hagloidea are insects belonging to the order Orthoptera: Ensifera; they are now represented by the extant Prophalangopsidae, with many extinct genera and families (see below). Families * † Eospilopteronidae * † Haglidae * ...
– grigs and allies ** Superfamily Phasmomimoidea† ** Superfamily
Rhaphidophoroidea The orthopteran family Rhaphidophoridae of the suborder Ensifera has a worldwide distribution. Common names for these insects include cave wētā, cave crickets, camelback crickets, camel crickets, Hogan bugs, spider crickets (sometimes shortene ...
– camel crickets, cave crickets, cave wētā ** Superfamily Schizodactyloidea – dune crickets ** Superfamily
Stenopelmatoidea Stenopelmatoidea is a superfamily of insects in the order Orthoptera; in some older classifications this group was referred to as Gryllacridoidea. Classification The classification and constituency of Stenopelmatoidea is an ongoing source of co ...
– wētā and allies ** Superfamily Tettigonioidea – katydids / bush crickets *''Incertae sedis'' **Superfamily Elcanoidea
Permian The Permian ( ) is a geologic period and stratigraphic system which spans 47 million years from the end of the Carboniferous Period million years ago (Mya), to the beginning of the Triassic Period 251.9 Mya. It is the last period of the Paleoz ...
-
Paleocene The Paleocene, ( ) or Palaeocene, is a geological epoch (geology), epoch that lasted from about 66 to 56 mya (unit), million years ago (mya). It is the first epoch of the Paleogene Period (geology), Period in the modern Cenozoic Era (geology), E ...


Relationships with humans


As pests

Several species of Orthoptera are considered pests of crops and rangelands or seeking warmth in homes by humans. The two groups of Orthoptera that cause the most damage are
grasshopper Grasshoppers are a group of insects belonging to the suborder Caelifera. They are among what is possibly the most ancient living group of chewing herbivorous insects, dating back to the early Triassic around 250 million years ago. Grasshopp ...
s and locusts. Locust are historically known for wiping out fields of crops in a day. Locust have the ability to eat up to their own body weight in a single day. Individuals gather in large groups called swarms, these swarms can range up to 80 million individuals that stretch 460 square miles. Grasshoppers can cause major agricultural damage but not to the documented extent as locust historically have. These insects mainly feed on weeds and grasses, however, during times of drought and high population density they will feed on crops. They are known pest in
soybean The soybean, soy bean, or soya bean (''Glycine max'') is a species of legume native to East Asia, widely grown for its edible bean, which has numerous uses. Traditional unfermented food uses of soybeans include soy milk, from which tofu an ...
fields and will likely feed on these crops once preferred food sources have become scarce.


As food

Most orthopterans are edible, making up 13% of all insects including some 80 species of grasshoppers being regularly consumed worldwide. In
Madagascar Madagascar (; mg, Madagasikara, ), officially the Republic of Madagascar ( mg, Repoblikan'i Madagasikara, links=no, ; french: République de Madagascar), is an island country in the Indian Ocean, approximately off the coast of East Africa ...
and
Oaxaca Oaxaca ( , also , , from nci, Huāxyacac ), officially the Free and Sovereign State of Oaxaca ( es, Estado Libre y Soberano de Oaxaca), is one of the 32 states that compose the political divisions of Mexico, Federative Entities of Mexico. It is ...
, grasshoppers and locusts are usually collected early in the morning when it is cooler as the orthopterans are less mobile due to being cold-blooded. In Thailand, house crickets are commonly reared and eaten; as of 2012, around 20,000 cricket farmers had farms in 53 of their 76 provinces. In the second century BCE in
Ancient Greece Ancient Greece ( el, Ἑλλάς, Hellás) was a northeastern Mediterranean civilization, existing from the Greek Dark Ages of the 12th–9th centuries BC to the end of classical antiquity ( AD 600), that comprised a loose collection of cult ...
,
Diodorus Siculus Diodorus Siculus, or Diodorus of Sicily ( grc-gre, Διόδωρος ;  1st century BC), was an ancient Greek historian. He is known for writing the monumental universal history ''Bibliotheca historica'', in forty books, fifteen of which su ...
is known to have called people from
Ethiopia Ethiopia, , om, Itiyoophiyaa, so, Itoobiya, ti, ኢትዮጵያ, Ítiyop'iya, aa, Itiyoppiya officially the Federal Democratic Republic of Ethiopia, is a landlocked country in the Horn of Africa. It shares borders with Eritrea to the ...
''Acridophagi'', meaning "eaters of locusts." In
Judaism Judaism ( he, ''Yahăḏūṯ'') is an Abrahamic, monotheistic, and ethnic religion comprising the collective religious, cultural, and legal tradition and civilization of the Jewish people. It has its roots as an organized religion in the ...
, the Orthoptera include the only insects considered
kosher (also or , ) is a set of dietary laws dealing with the foods that Jewish people are permitted to eat and how those foods must be prepared according to Jewish law. Food that may be consumed is deemed kosher ( in English, yi, כּשר), fro ...
. The list of dietary laws in the
book of Leviticus The book of Leviticus (, from grc, Λευιτικόν, ; he, וַיִּקְרָא, , "And He called") is the third book of the Torah (the Pentateuch) and of the Old Testament, also known as the Third Book of Moses. Scholars generally agree ...
forbids all flying insects that walk, but makes an exception for certain locusts. Notably, the
dragonfly A dragonfly is a flying insect belonging to the infraorder Anisoptera below the order Odonata. About 3,000 extant species of true dragonfly are known. Most are tropical, with fewer species in temperate regions. Loss of wetland habitat threate ...
and crane fly are not considered kosher even though they are helpless when unable to fly. The
Torah The Torah (; hbo, ''Tōrā'', "Instruction", "Teaching" or "Law") is the compilation of the first five books of the Hebrew Bible, namely the books of Genesis, Exodus, Leviticus, Numbers and Deuteronomy. In that sense, Torah means the s ...
states the only kosher flying insects with four walking legs have knees that extend above their feet so that they hop.


As creators of biofuel

With new research showing promise in locating alternative
biofuel Biofuel is a fuel that is produced over a short time span from biomass, rather than by the very slow natural processes involved in the formation of fossil fuels, such as oil. According to the United States Energy Information Administration (E ...
sources in the gut of insects, grasshoppers are one species of interest. The insect's ability to break down
cellulose Cellulose is an organic compound with the formula , a polysaccharide consisting of a linear chain of several hundred to many thousands of β(1→4) linked D-glucose units. Cellulose is an important structural component of the primary cell wall ...
and
lignin Lignin is a class of complex organic polymers that form key structural materials in the support tissues of most plants. Lignins are particularly important in the formation of cell walls, especially in wood and bark, because they lend rigidity ...
without producing greenhouse gases has aroused scientific interest.


See also

* List of Orthoptera recorded in Britain *
Orthopterida The cohort Polyneoptera is a proposed taxonomic ranking for the Orthoptera (grasshoppers, crickets, etc.) and all other Neopteran insects believed to be more closely related to Orthoptera than to any other insect orders. These winged insects, no ...
*
Female sperm storage Female sperm storage is a biological process and often a type of sexual selection in which sperm cells transferred to a female during mating are temporarily retained within a specific part of the reproductive tract before the oocyte, or egg, is fe ...


References


External links


Orthoptera Species File OnlineOrthoptera Image Gallery (Iowa State University Entomology Department)Australian Plague Locust CommissionThe Orthopterists' SocietyAcridAfrica, les acridiens d'Afrique de l'Ouest
*
Birdwing Grasshoppers in BelizeSound recordings of Orthoptera at BioAcoustica
{{Authority control Insect orders Edible insects Carboniferous first appearances Taxa named by Pierre André Latreille Orthopterida