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Did the development of agriculture prevent an ice age occurring?
Some recent news reports about ancient anthropogenic methane emissions have hinted that the simultaneous contributions of the Roman Empire and the Han Chinese may have produced enough to start the huma...
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Pauropods are small, pale, centipede-like arthropods. They form the order Pauropodina, belonging to the monotypic class Pauropoda. About 500 species in four families are found worldwide, living in soil and leaf mould. They look rather like centipedes, but are probably the sister group to millipedes. The name is derived from the Greek roots ' "small" and ' "foot".
Anatomy and ecology
Pauropoda are soft, cylindrical animals with bodies long. The antennae are branching, which is distinctive for the group.
Pauropoda live in the soil, usually at densities of less than 100 per square metre.
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Symphylans, also known as garden centipedes or glasshouse symphylans, are soil-dwelling arthropods of the class Symphyla in the subphylum Myriapoda. Symphylans resemble centipedes, but are smaller and translucent. They can move rapidly through the pores between soil particles, and are typically found from the surface down to a depth of about 50 cm. They consume decaying vegetation, but can do considerable harm in an agricultural setting by consuming seeds, roots, and root hairs in cultivated soil.
Juveniles have six pairs of legs, but, over a lifetime of several years, add an addit...
Lepisma saccharina, frequently called a silverfish or fishmoth is a small, wingless insect in the order Thysanura. Its common name derives from the animal's silvery light grey and blue colour, combined with the fish-like appearance of its movements, while the scientific name indicates the silverfish's diet of carbohydrates such as sugar or starches.
Distribution
Silverfish are a cosmopolitan species, found in Africa, America, Europe, Australia, Asia and other parts of the Pacific. They inhabit moist areas, requiring a relative humidity between 75% and 95%. In urban areas, they can be ...
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Seta , plural: setae , is a biological term derived from the Latin word for "bristle". It refers to a number of different bristle- or hair-like structures on living organisms.
Animal setae
In zoology, most "setae" occur in invertebrates.
*Setae in annelids are stiff bristles present on the body. They help for example earthworms to attach to the surface and prevent backsliding during peristaltic motion. These hairs are what make it difficult to pull a worm straight from the ground. Setae in oligochaetes (a group including earthworms) are largely composed of chitin. They are cl...
A chaeta or cheta (see spelling differences) is a chitinous bristle or seta found on an insect, arthropod or annelid worms such as the earthworm, although the term is also frequently used to describe similar structures in other invertebrates. The plural form is chaetae or chetae.
In the Polychaeta, they are located on the parapodia.
A range of chaetal shapes and formats exists. Particular forms of chaetae are often species-specific, giving the features a useful taxonomic function.
See also
Chaetotaxy
References
Springtails (Collembola) form the largest of the three lineages of modern hexapods that are no longer considered insects (the other two are the Protura and Diplura). Although the three orders are sometimes grouped together in a class called Entognatha because they have internal mouthparts, they do not appear to be any more closely related to one another than they all are to insects, which have external mouthparts.
Some DNA sequence studies suggest that Collembola represent a separate evolutionary line from the other Hexapoda, but others disagree; this seems to be caused by widely diverge...
The Protura, or proturans, and sometimes nicknamed coneheads are very small ( called "styli". The genitalia are internal and the genital opening lies between the eleventh segment and the telson of the adult. Members of Eosentomoidea possess spiracles and a simple tracheal system while those in the Acerentomoidea lack these structures and perform gas exchange by diffusion.
Ecology
Proturans live chiefly in soil, moss and leaf litter they have also been found beneath rocks or under the bark of trees, as well as in animal burrows. They are generally restricted to the uppermost , but have be...
In Greek mythology, Polyxenus () is a name that may refer to:
*One of the first priests of Demeter and one of the first to learn the secrets of the Eleusinian Mysteries.
*Son of Agasthenes and Peloris, king of Elis. He was counted among the suitors of Helen, and accordingly participated in the Trojan War, having brought 40 ships with him. He returned home safely after the war, and had a son Amphimachus, whom he possibly named after his friend Amphimachus (son of Cteatus), who had died at Troy. Polyxenus, king of Elis, was also said to have been entrusted with the stolen cattle by the Ta...
My wife uses her nails to “gently scratch” our 3-year-old son’s back for ~15 mins right before falling sleep. He likes it a lot. There’s a word škrabkať in my native language (Slovak), and I was wondering if there is a similar one in English. Do we scratch our children? Doesn’t it sound weird?
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English Language & Usage: Multi-Layer…
Not for the faint of heart or those easily triggered by Englis...
