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|with prey nettle tree butterfly (Libythea celtis) on spearmint (Mentha spicata), Pirin National Park, Bulgaria|
T. o. meridionalisStrand, 1907
Thomisus onustus is a crab spider species in the genus Thomisus belonging to the family Thomisidae.
This species shows sexual dimorphism both in size and coloration. The adult males reach a body length of only 2–4 millimetres (0.079–0.157 in), while females are 6–7 millimetres (0.24–0.28 in) long. In males, the basic colour of the prosoma varies from yellow brown to dark brown, the opisthosoma may be yellow and green or brown. Females are very variable in colour, their basic colour can be white, yellow pale brown or pink, sometimes with additional shades of red. This species is characterized by the prominent rear corners of the opisthosoma.
Like other species of the family Thomisidae these crab spiders do not make a web, but wait in ambush for their prey on flowers. The spiders are disguised by assuming the same colour as the flower, fooling both insect and bird predators. The prey consists of flower-visiting insects of all species, such as hover flies, bees, wasps, butterflies or beetles, which are often several times larger than the spider. They take their prey with two powerful and highly enlarged front leg pairs and usually kill them by biting on the back of their neck. Emerging spiderlings of Thomisus onustus may feed on pollen or nectar when insect prey is lacking.
Mating takes place mainly in June. The male climbs onto the back of the female to copulate. Finally, the male leaves the female. The female during the entire mating is completely passive and does not show any aggressive behaviour.
It has a Palearctic distribution, being found from Great Britain and Portugal in the west to Japan in the east. [ citation needed ] Its north–south distribution extends from Sweden to South Africa and from Siberia to Central Java, including temperate and tropical ecozones.[ citation needed ] These spiders prefer warm temperatures, frost-free areas, dry and sandy habitats with high solar radiation and dry grasslands.[ citation needed ]It is present in most countries of Europe, but is absent in Iceland, Ireland, Norway, Denmark and Finland, and it has also been seen in Iraq.
The Thomisidae are a family of spiders, including about 175 genera and over 2,100 species. The common name crab spider is often linked to species in this family, but is also applied loosely to many other families of spiders. Many members of this family are also known as flower spiders or flower crab spiders.
Lynx spider (Oxyopidae) is a family of araneomorph spiders first described by Tamerlan Thorell in 1870. Most species make little use of webs, instead spending their lives as hunting spiders on plants. Many species frequent flowers in particular, ambushing pollinators, much as crab spiders do. They tend to tolerate members of their own species more than most spiders do, and at least one species has been identified as exhibiting social behaviour.
Xysticus is a genus of ground crab spiders described by C. L. Koch in 1835, belonging to the order Araneae, family Thomisidae. The genus name is derived from the Ancient Greek root xyst, meaning "scraped, scraper".
Theridion grallator, also known as the Hawaiian happy-face spider, is a spider in the family Theridiidae. Its Hawaiian name is nananana makakiʻi. The specific epithet grallator is Latin for "stilt walker", a reference to the species' long, spindly legs.
Misumena vatia is a species of crab spider with holarctic distribution. In North America it is called the goldenrod crab spider or flower (crab) spider, because it is commonly found hunting in goldenrod sprays in the autumn. Young males in the early summer may be quite small and easily overlooked, but females can grow up to 10 mm (0.39 in) ; males reach 5 mm (0.20 in) at most.
Araniella cucurbitina, sometimes called the "cucumber green spider", is a spider of the family Araneidae.
Platythomisus is a genus of flattened crab spiders from Africa and Southern Asia.
Thomisus is a genus of crab spiders with around 150 species described. The genus includes species that vary widely in their ecology, with some that ambush predators that feed on insects visiting flowers. Like several other genera in the family Thomisidae, they are sometimes referred to as flower crab spiders, from their crab-like motion and their way of holding their front legs, reminiscent of a crab spreading its claws as a threat.
Sidymella rubrosignata is a species of crab spiders found in Australia. It is a common spider, often seen on Dianella plants.
Misumenoides formosipes is a species of crab spiders found in the US and Canada. The species' unofficial common name is white banded crab spider, which refers to a white line that runs through the plane of their eyes.
Arkys lancearius, the triangular spider, is a common Australian spider belonging to the family Arkyidae. It is an ambush hunter, commonly found resting on leaves and ferns or hanging from just a few threads of silk. The front two pairs of legs are large, suited for grabbing small insects, while the rear pairs of legs are much smaller.
Synema globosum is a species of spiders belonging to the family Thomisidae. It is sometimes called the Napoleon spider, because of a supposed resemblance of the markings on the abdomen to a silhouette of Napoleon.
Rabidosa rabida, also known as the rabid wolf spider, is a species of spiders from the family Lycosidae, native to North America. In the United States it is found from Maine to Florida and west to Texas.
Anoplius viaticus, commonly known as the black-banded spider wasp, is a species of spider wasp. These wasps are known as spider wasps because the females capture spiders to provide their offspring with food. The paralysed spider is cached in a burrow, the wasp lays an egg on it, and when this hatches, the developing wasp larva consumes the spider. This species is found in sandy heathland across most of Europe.
The yellow crab spider,, is a species of spider of the genus Thomisus. It is found in Sri Lanka, Singapore, Sumatra, Nias Island, and Java. They often hide in flowers and are able to change colors just to blend in to capture preys.
Xysticus cristatus, the common crab spider, is a European spider from the family Thomisidae.
Tetragnatha montana, commonly known as the silver stretch spider, is a species of long-jawed orb weaver from the family Tetragnathidae that has a Palearctic distribution. It preys mostly on flies and mosquitoes. The name silver stretch spider refers to its shiny metallic colour and its habit of extending its legs into a stick like shape.
Ebrechtella tricuspidata is a species of crab spiders belonging to the family Thomisidae.
Thomisus spectabilis, the white crab spider, is a small spider found in Australia and far east Asia.
Australomisidia cruentata, one of the crab spiders, is a small spider found in Australia. The body length of the female is up to 5 mm, the male 3 mm. An ambush predator, often seen on flowers in the Pultenaea group of egg and bacon plants, belonging to the pea family. The egg sac is also laid on the flowers. Petals being fastened with silk in a chamber. The spider stays with the eggs, probably still hunting from the entrance of the retreat, with the egg sac nearby. Prey is small flying insects. The genus Australomisidia was created in 2014, the word being a combination of Australia and Thomisidae, the crab spiders.
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