|Male of Micrommata virescens|
|Female of Micrommata virescens|
Micrommata virescens, common name green huntsman spider, is a species of huntsman spiders belonging to the family Sparassidae.
This species has a Palearctic distribution.It occurs naturally in Northern and Central Europe, including Denmark and southern Britain.
In the females of Micrommata virescens the body length can reach 12–16 millimetres (0.47–0.63 in), while in the males it is about 7–10 millimetres (0.28–0.39 in).
The cephalothorax and the long legs of the females are bright green, with a lighter green abdomen showing a darker green median stripe. The eight eyes are arranged in two rows and surrounded by white hairs.Males are dark green-olive and have a narrower abdomen, with red sides and a red to red-brown median stripe bordered yellow. Young spiders have a yellow-brown cephalothorax, with dark marginal and median stripes. Only after the last molting in the following spring the juveniles assume the typical coloration of the adults.
The green coloration is due to the bilin micromatabilinand its conjugates in haemolymph, interstitial tissues and the yolk of oocytes.
These characteristic huntsman spiders can be found at the edges of forests, in dry meadows, in damp woodland clearings and rides, where they prefer grass and the lower branches of trees.
These spiders are mainly diurnal. Like many other spiders, they do not build a web, and hunt insects in green vegetation, where they rely on their camouflage. Their green color makes them very difficult to be detected by predators.They grow relatively slowly, taking 18 months to reach maturity. Females are fertile from May through to September. A few days after mating, the males die. In July the females enclose the egg-sac into a few leaves stitched together. Cocoons are guarded by females. After about 4 weeks eggs hatch about 40-50 young spiders.
Huntsman spiders, members of the family Sparassidae, are known by this name because of their speed and mode of hunting. They are also called giant crab spiders because of their size and appearance. Larger species sometimes are referred to as wood spiders, because of their preference for woody places. In southern Africa the genus Palystes are known as rain spiders or lizard-eating spiders. Commonly, they are confused with baboon spiders from the Mygalomorphae infraorder, which are not closely related.
Araneus quadratus, the four-spot orb-weaver, is a common orb-weaver spider found in Europe and Central Asia, and as far as the Kamchatka Peninsula and Japan. Females can reach 17 mm in length, especially when gravid, males approximately half that. They are quite variable in appearance, ranging from brown to bright orange or green, but they always have the characteristic four white spots on the abdomen. The darker color morphs are easier to identify, due to the contrast between the white spots and the rest of the body. The legs are sometimes brightly striped.
Piranthus is a genus of jumping spiders first described in 1895 by Tamerlan Thorell, who derived the name from Greek mythology. As of February 2019 this genus contains only two species.
Ommochrome refers to several biological pigments that occur in the eyes of crustaceans and insects. The eye color is determined by the ommochromes. Ommochromes are also found in the chromatophores of cephalopods, and in spiders.
Misumena vatia is a species of crab spider with a holarctic distribution. In North America, it is called the goldenrod crab spider or flower (crab) spider, as it is commonly found hunting in goldenrod sprays and milkweed plants. They are called crab spiders because of their unique ability to walk sideways as well as forwards and backwards. Both males and females of this species progress through several molts before reaching their adult sizes, though females must molt more to reach their larger size. Females can grow up to 10 mm (0.39 in) while males are quite small, reaching 5 mm (0.20 in) at most. Misumena vatia are usually yellow or white or a pattern of these two colours. They may also present with pale green or pink instead of yellow, again, in a pattern with white. They have the ability to change between these colors based on their surroundings with these color changes occur through the molting process. They have a complex visual system, with eight eyes, that they rely on for prey capture and for their color-changing abilities. Sometimes, if Misumena vatia consume colored prey, the spider itself will take on that color.
Micrommata is a genus of huntsman spiders that was first described by Pierre André Latreille in 1804.
Diaea dorsata is one of the smaller crab spiders, with a palearctic distribution. Females can grow up to 6 mm, males up to 4 mm. Prosoma and legs are green, the opisthosoma is yellowish with a brown mark.
Peucetia viridans, the green lynx spider, is a bright-green lynx spider usually found on green plants. It is the largest North American species in the family Oxyopidae. This spider is common in the southern U.S., Mexico, Central America, and in many West Indie islands, especially Jamaica.
Gasteracantha fornicata is a species of spiny orb-weavers found in Queensland Australia. It is similar in shape to Austracantha minax which was originally described as Gasteracantha minax. It was described by Johan Christian Fabricius in 1775, the first Australian species of spider to be named and classified.
Bilins, bilanes or bile pigments are biological pigments formed in many organisms as a metabolic product of certain porphyrins. Bilin was named as a bile pigment of mammals, but can also be found in lower vertebrates, invertebrates, as well as red algae, green plants and cyanobacteria. Bilins can range in color from red, orange, yellow or brown to blue or green.
Saitis barbipes is a common jumping spider found in the Mediterranean region.
Heteropoda davidbowie is a species of huntsman spider of the genus Heteropoda. It was described from the Cameron Highlands District in peninsular Malaysia and named in honour of singer David Bowie.
Spiders are air-breathing arthropods that have eight legs, chelicerae with fangs generally able to inject venom, and spinnerets that extrude silk. They are the largest order of arachnids and rank seventh in total species diversity among all orders of organisms. Spiders are found worldwide on every continent except for Antarctica, and have become established in nearly every land habitat. As of August 2021, 49,623 spider species in 129 families have been recorded by taxonomists. However, there has been dissension within the scientific community as to how all these families should be classified, as evidenced by the over 20 different classifications that have been proposed since 1900.
Pimoa cthulhu is a species of the spider family Pimoidae. It is one of twenty-one described species in the genus Pimoa.
Carrhotus xanthogramma is a species of 'jumping spiders' belonging to the family Salticidae.
Heliophanus tribulosus is a species of 'jumping spiders' belonging to the family Salticidae.
Micrommata ligurina is a species of huntsman spider. It was first described by Carl Ludwig Koch in 1845.
Micromatabilin, the green pigment of the spider species Micrommata virescens, is characterized as a mixture of biliverdin conjugates. The two isolated fractions have identical absorption bands. Chromic acid degradation yields imides I, II, IIIa, and IIIb. Differences in the non-hydrolytic degradation and in polarity lead to the conclusion that fraction 1 is a monoconjugate and fraction 2a diconjugate of biliverdin.
Diminutella is a genus of spiders in the family Sparassidae. It was first described in 2018 by Rheims and Alayón. It is a monotypic genus with one described species, Diminutella cortina. It is endemic to Pinar del Rio, Cuba.
Ebrechtella tricuspidata is a species of crab spiders belonging to the family Thomisidae.