The giant huntsman spider (''Heteropoda maxima'') is a

species In biology, a species is the basic unit of Taxonomy (biology), 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 ...

of the

huntsman spider Huntsman spiders, members of the family Sparassidae (formerly Heteropodidae), 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 sometim ...

family ''Sparassidae'' found in Laos. It is considered the world's largest spider by leg span, which can reach up to .

Description

The colouration is yellowish-brown with several irregularly distributed dark spots on the rear half. The legs have wide dark bands before the first bend. Like all huntsman spiders, the legs of the giant huntsman spider are long compared to the body, and twist forward in a crab-like fashion. Apart from its size, the ''H. maxima'' can be distinguished from other species of ''Heteropoda'' by genital characteristics. On males, the cymbium is at least three times longer than the

tegulum The two palpal bulbs – also known as palpal organs and genital bulbs – are the copulatory organs of a male spider. They are borne on the last segment of the pedipalps (the front "limbs" of a spider), giving the spider an appearance often desc ...

. The female is distinguished by a characteristically shaped epigyneal field with two anterior directed bands, and the course of their internal ducts. The giant huntsman spider is the largest member of the family Sparassidae, boasting a leg-span, and body-length. The largest known member of the Sparassidae known prior to the discovery of ''H. maxima'' was the Australian '' Beregama aurea'' (L. Koch, 1875) with a body length of about . (Other relatively large members of Sparassidae have been discovered in recent years, including '' Cerbalus aravaensis'', the largest in the Middle East).

Taxonomy and naming

''Heteropoda maxima'' was first described in 2001 by Peter Jäger, after being discovered in a cave in Laos. Over a thousand new species of plant and animal were found between 1997 and 2007 in the

Greater Mekong Subregion The Greater Mekong Subregion, (GMS) or just Greater Mekong, is a trans-national region of the Mekong River basin in Southeast Asia. The region is home to more than 300 million people. It came into being with the launch of a development program i ...

. A representative of the

World Wide Fund for Nature The World Wide Fund for Nature Inc. (WWF) is an international non-governmental organization founded in 1961 that works in the field of wilderness preservation and the reduction of human impact on the environment. It was formerly named the Wor ...

stated that "some of these species really have no business being recently discovered", suggesting that it is surprising for such a large species to go undiscovered for so long.

Distribution and habitat

The giant huntsman spider is found in Laos, and is believed to be a cave dweller because of its pale colour, long legs and special hairs on the second foot of the male. There is no apparent reduction of the eyes, possibly because the species lives near cave entrances.

Cannibalism

Florian and Diana Schnös discovered cannibalism within the species of giant huntsman spiders in a cave near Vang Vieng in Laos. Female individuals may eat male individuals after mating, a characteristic more commonly associated with the genus ''

Latrodectus ''Latrodectus'' is a broadly distributed genus of spiders with several species that are commonly known as the true widows. This group is composed of those often loosely called black widow spiders, brown widow spiders, and similar spiders. Howeve ...

'', the ''true widows,'' although it is considered normal spider behavior. CannibalismGianthuntsmanSpider

Description

Taxonomy and naming

Distribution and habitat

Cannibalism

See also

References

Further reading