|
Striariidea
Chordeumatida (from the Greek word for "sausage") is a large order of millipedes containing more than 1,400 species. Also known as sausage millipedes, they are found nearly worldwide. Chordeumatida is the largest order in the superorder Nematophora, a group also known as spinning millipedes because their telsons feature spinnerets used to build nests of silk. These millipedes produce this silk to create chambers in which to molt or to lay their eggs. Description Chordeumatidans take on a wide variety of forms, including some that are cylindrical and others that are flat-backed. Most species have 26 to 32 body segments (including the telson) behind the head, with the number usually fixed within species. These millipedes range in length from 3.5 mm to 42 mm, although most species are 10 mm to 25 mm long. They are usually drab in color, ranging from various shades of brown to unpigmented, but some feature distinct patterns. Species in this order share a set of features that di ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Craspedosomatidea
Chordeumatida (from the Greek word for "sausage") is a large order (biology), order of millipedes containing more than 1,400 species. Also known as sausage millipedes, they are found nearly worldwide. Chordeumatida is the largest order in the Order (biology), superorder Nematophora, a group also known as spinning millipedes because their Telson, telsons feature spinnerets used to build nests of silk. These millipedes produce this silk to create chambers in which to molt or to lay their eggs. Description Chordeumatidans take on a wide variety of forms, including some that are cylindrical and others that are flat-backed. Most species have 26 to 32 body segments (including the telson) behind the head, with the number usually fixed within species. These millipedes range in length from 3.5 mm to 42 mm, although most species are 10 mm to 25 mm long. They are usually drab in color, ranging from various shades of brown to unpigmented, but some feature distinct patterns. Species in this ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Heterochordeumatidea
Chordeumatida (from the Greek word for "sausage") is a large order of millipedes containing more than 1,400 species. Also known as sausage millipedes, they are found nearly worldwide. Chordeumatida is the largest order in the superorder Nematophora, a group also known as spinning millipedes because their telsons feature spinnerets used to build nests of silk. These millipedes produce this silk to create chambers in which to molt or to lay their eggs. Description Chordeumatidans take on a wide variety of forms, including some that are cylindrical and others that are flat-backed. Most species have 26 to 32 body segments (including the telson) behind the head, with the number usually fixed within species. These millipedes range in length from 3.5 mm to 42 mm, although most species are 10 mm to 25 mm long. They are usually drab in color, ranging from various shades of brown to unpigmented, but some feature distinct patterns. Species in this order share a set of features that di ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gonopod
Gonopods are specialized appendages of various arthropods used in reproduction or egg-laying. In males, they facilitate the transfer of sperm from male to female during mating, and thus are a type of intromittent organ. In crustaceans and millipedes, gonopods are modified arthropod leg, walking or swimming legs. Gonopods may be highly decorated with elaborate structures which may play roles in sperm competition, and can be used to differentiate and identify closely related species. Gonopods generally occur in one or more pairs, as opposed to the single (un-paired) reproductive organs such as the aedeagus of insects or the Opiliones penis, penis of harvestmen. Insects In insects, gonopods are appendages of the genital segment that may be used in insemination, or that comprise the egg-laying apparatus. Crustaceans In male decapoda, decapod crustaceans, gonopods are modified swimming appendages (pleopods). The anterior two pair of pleopods in males are modified for sperm transferr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Branneria
''Branneria'' is a genus of small millipedes in the order Chordeumatida and the only genus in the family Branneriidae. Individuals reach about long. There are two species known, found in the southeastern USA: ''Branneria bonoculus'' is found in Arkansas and eastern Texas while ''B. carinata'' occurs from North Carolina to Florida and Mississippi. The adult ''B. bonoculus'' millipede has 28 body segments (including the telson), and the adult ''B. carinata'' millipede has 26, both fewer than the 30 usually found in the order Chordeumatida. In both species, the gonopod Gonopods are specialized appendages of various arthropods used in reproduction or egg-laying. In males, they facilitate the transfer of sperm from male to female during mating, and thus are a type of intromittent organ. In crustaceans and millipe ... complex in adult males includes three leg pairs (pairs 8 through 10) rather than just the two (pairs 8 and 9) that are usually modified into gonopods in this order. R ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Speophilosomatidae
Speophilosomatidae is a family of millipedes belonging to the order Chordeumatida. These millipedes are found in Japan and range from 4 mm to 6 mm in length. Adult millipedes in this family are notable for being among the few in this order with only 26 segments (counting the collum, the telson, and the segments in between) instead of the 30 usually found in chordeumatidans. The adult males in this family are also notable for involving three leg pairs (pairs 7 through 9) in the gonopod Gonopods are specialized appendages of various arthropods used in reproduction or egg-laying. In males, they facilitate the transfer of sperm from male to female during mating, and thus are a type of intromittent organ. In crustaceans and millipe ... complex rather than the two pairs (pairs 8 and 9) typically modified into gonopods in this order. Genera: * '' Speophilosoma'' Takakuwa, 1949 References {{Taxonbar, from=Q21064964 Chordeumatida Millipede families ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Millipede
Millipedes (originating from the Latin , "thousand", and , "foot") are a group of arthropods that are characterised by having two pairs of jointed legs on most body segments; they are known scientifically as the class Diplopoda, the name derived from this feature. Each double-legged segment is a result of two single segments fused together. Most millipedes have very elongated cylindrical or flattened bodies with more than 20 segments, while pill millipedes are shorter and can roll into a tight ball. Although the name "millipede" derives from Latin for "thousand feet", no species was known to have 1,000 or more until the discovery in 2020 of '' Eumillipes persephone'', which can have over 1,300 legs. There are approximately 12,000 named species classified into 16 orders and around 140 families, making Diplopoda the largest class of myriapods, an arthropod group which also includes centipedes and other multi-legged creatures. Most millipedes are slow-moving detritivores, eat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lipseuma
''Lipseuma'' is a genus of millipedes in the family Kashmireumatidae. This genus contains only two species, the type species '' L. josianae'' and its close relative '' L. bernardi''. Both species are troglobites found in caves in China. The species in this genus are notable for featuring gonopods that are among the simplest in the order Chordeumatida. Discovery and distribution This genus and its two species were first described in 2006 by the myriapodologist Sergei Golovatch of the Russian Academy of Sciences and two myriapodologists at the Muséum National d’Histoire Naturelle in France, Jean-Jacques Geoffroy and Jean-Paul Mauriès. The original descriptions are based on specimens collected in 1999 by the biospeleologists Josiane and Bernard Lips, for whom the genus and its two species are named. The ''L. josianae'' holotype (a male) and seven paratypes (two males, one female, and four juveniles) were found in the Chuan Dong Zi cave in Banqiao in Hubei province in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Xystrosoma
''Xystrosoma'' is a genus of millipede in the family Chamaesomatidae. The French zoologist Henri Ribaut first described this genus in 1927 to contain five species newly discovered in France, including the type species '' X. tectosagum''. This genus now includes ten species. Distribution Most species in this genus are found in the French Pyrenees. Three species in this genus are found in northern Spain: two species found in the autonomous community of Catalonia ('' X. coiffati'' and '' X. santllorence'') and one species found in the Basque autonomous community ('' X. vasconicum''). One species in this genus is found in northern Portugal ('' X. lusitanicum''). Description Adult millipedes in this genus can have 26, 28, or 30 segments (counting the collum as the first segment and the telson as the last). This genus includes three species notable for featuring an unusual number of segments: The Spanish species ''X. santllorence'' is one of only a few species in the order Cho ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Buotidae
Buotidae is a family of millipedes belonging to the order Chordeumatida. This family contains a single species, ''Buotus carolinus'', which exhibits sexual dimorphism Sexual dimorphism is the condition where sexes of the same species exhibit different Morphology (biology), morphological characteristics, including characteristics not directly involved in reproduction. The condition occurs in most dioecy, di ... in segment number: the adult female has 28 segments, but the adult male has only 26, both fewer than the 30 usually found in this order (counting the collum as the first segment and the telson as the last). These millipedes are very small (no more than 4 mm in length) and have been found in the mountains of Virginia, West Virginia, and North Carolina. Genera: * '' Buotus'' Chamberlin, 1940 References {{Taxonbar, from=Q21065055 Chordeumatida Millipede families ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sexual Dimorphism
Sexual dimorphism is the condition where sexes of the same species exhibit different Morphology (biology), morphological characteristics, including characteristics not directly involved in reproduction. The condition occurs in most dioecy, dioecious species, which consist of most animals and some plants. Differences may include secondary sex characteristics, size, weight, color, markings, or behavioral or cognitive traits. Male-male reproductive competition has evolved a diverse array of sexually dimorphic traits. Aggressive utility traits such as "battle" teeth and blunt heads reinforced as battering rams are used as weapons in aggressive interactions between rivals. Passive displays such as ornamental feathering or song-calling have also evolved mainly through sexual selection. These differences may be subtle or exaggerated and may be subjected to sexual selection and natural selection. The opposite of dimorphism is ''monomorphism'', when both biological sexes are phenotype, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
