Delena cancerides | |
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Illustration by Des Helmore | |
Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Arthropoda |
Subphylum: | Chelicerata |
Class: | Arachnida |
Order: | Araneae |
Infraorder: | Araneomorphae |
Family: | Sparassidae |
Genus: | Delena |
Species: | D. cancerides |
Binomial name | |
Delena cancerides Walckenaer, 1837 | |
Synonyms | |
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Delena cancerides, the communal huntsman, flat huntsman or social huntsman, is a large, brown huntsman spider native to Australia. It has been introduced to New Zealand, where it is sometimes known as the Avondale spider. [1] This was the species used in the Australian movie Napoleon and widely in Arachnophobia , and all films depict them as having a deadly venomous bite, but they are generally considered harmless to humans in real-life. [2] It was first described by Charles Athanase Walckenaer in 1837. [3]
Highly unusual among spiders, the flat huntsman spider is a social species, even sharing prey. [1] They are often found under loose bark (their flat shape is an adaptation for this) in colonies up to 300, but they are highly aggressive and commonly cannibalistic toward members from other colonies. [4] They hunt their food rather than spin webs for it. They are timid towards humans and bites are infrequent, and when they occur, symptoms are usually very minor. [5]
The species is found all over Australia, including Tasmania. It was introduced to New Zealand in 1924. Its range in New Zealand expanded slowly out of Avondale, a suburb of Auckland, hence the alternative New Zealand common name. [1] There is a sculpture in the Avondale shopping centre celebrating the spider.
Male D. cancerides have a body length of 20–25 millimetres (0.79–0.98 in), while females are larger, with a body length of 25–32 mm (0.98–1.26 in). [6] The body is light brown and covered in dense, fine hairs. The legs are also hairy, and can have a span of over 15 centimetres (5.9 in). [2]
Various populations show major differences in the chromosomes, leading to the recognition of several "chromosomal subspecies", but these hybridize where in contact and there is little genetic divergence. [1]
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.
Uloboridae is a family of non-venomous spiders, known as cribellate orb weavers or hackled orb weavers. Their lack of venom glands is a secondarily evolved trait. Instead, they wrap their prey thoroughly in silk, cover it in regurgitated digestive enzymes, and then ingest the liquified body.
Heteropoda venatoria is a species of spider in the family Sparassidae, the huntsman spiders. It is native to the tropical regions of the world, and it is present in some subtropical areas as an introduced species. Its common names include giant crab spider, banana huntsman spider or cane spider.
Micrommata is a genus of huntsman spiders that was first described by Pierre André Latreille in 1804.
Micrommata virescens, common name green huntsman spider, is a species of huntsman spiders belonging to the family Sparassidae.
Delena is a genus of South Pacific huntsman spiders that was first described by Charles Athanase Walckenaer in 1837.
A social spider is a spider species whose individuals form relatively long-lasting aggregations. Whereas most spiders are solitary and even aggressive toward other members of their own species, some hundreds of species in several families show a tendency to live in groups, often referred to as colonies.
The giant huntsman spider is a species of the huntsman spider family Sparassidae found in Laos. It is considered the world's largest spider by leg span, which can reach up to 30 cm (1 ft).
Cerbalus aravaensis is a huntsman spider found in the southern Arava Valley of Israel and Jordan. The species was first described by Gershom Levy of the Hebrew University of Jerusalem in 2007, though news agencies later reported it in 2010 as a new discovery by a team of biologists from the University of Haifa. The spider has a leg span of 14 centimetres (5.5 in), making it the largest member of the family Sparassidae in the Middle East. Males have a body length of 1.85–2.40 centimetres (0.73–0.94 in), while females' body length is 2.20–2.65 centimetres (0.87–1.04 in).
New Zealand has 1157 described spider species, with an estimated total fauna of 2000 species. Over 97 per cent are endemic, and the rest have been introduced through human activities or were natural wind-borne introductions.
Heteropoda cervina, commonly called the brown huntsman, is a large species of spider in the family Sparassidae often found in leaf litter in central Queensland, Australia. The species was first described by Ludwig Carl Christian Koch in 1875 as Sarotes cervinus.
Holconia is a genus of Southern Pacific huntsman spiders that was first described by Tamerlan Dahls Thorell in 1877. It was branched from Isopeda in 1990.
Isopeda villosa is a species of huntsman spider native to New South Wales, Australia, and established in Auckland, New Zealand. It was first described by Ludwig Carl Christian Koch in 1875.
David B. Hirst is an arachnologist previously based at the South Australian Museum in Adelaide. He left the Museum on 22 February 2011. He has described more than 40 species and genera in the huntsman spider family, Sparassidae, and was regularly called on by New Zealand authorities to identify huntsman spiders that entered their country.
Palystes is a genus of huntsman spiders, commonly called rain spiders or lizard-eating spiders, occurring in Africa, India, Australia, and the Pacific. The most common and widespread species is P. superciliosus, found in South Africa, home to 12 species in the genus. The name Palystes is derived from either the Latin palaestes or the Greek palaistes, meaning "wrestler". The genus was first described by Ludwig Carl Christian Koch in 1875.
Pandercetes is a genus of huntsman spiders that was first described by Ludwig Carl Christian Koch in his 1875 treatise on Australian spiders. They are mainly distributed in tropical Asia and Australia, and are known for their cryptic coloration that matches local moss and lichen. Their legs have lateral hairs, giving them a feathery appearance, further masking their outline against tree trunks. Their head is somewhat elevated and the carapace has the thoracic region low and flat.
Keilira is a genus of Australian huntsman spiders that was first described by D. B. Hirst in 1989. As of September 2019 it contains two species, found in South Australia and Victoria: K. sokoli and K. sparsomaculata.
Polybetes is a genus of South American huntsman spiders that was first described by Eugène Louis Simon in 1897. It is a senior synonym of Leptosparassus and Streptaedoea.
Thunberga is a genus of east African huntsman spiders. The genus was first described by Peter Jäger in 2020, and it has only been found on Madagascar and on Mayotte. It is named after the environmental activist Greta Thunberg.