Missulena

Missulena
	Male Missulena occatoria
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Arthropoda
Subphylum:	Chelicerata
Class:	Arachnida
Order:	Araneae
Infraorder:	Mygalomorphae
Family:	Actinopodidae
Genus:	Missulena ; Walckenaer, 1805
Type species
	M. occatoria ; Walckenaer, 1805
Species
	21, see text
Synonyms
	Eriodon Latreille, 1806;

Last updated November 13, 2024

Missulena is a genus of mygalomorph spiders in the family Actinopodidae. It was first described by Charles Walckenaer in 1805,^[3] and is a senior synonym of Eriodon.^[2]M. tussulena is found in Chile, but the rest are indigenous to Australia.^[4] They are sometimes referred to as "mouse spiders" from the now-disproven belief that they dig deep burrows similar to those of mice. Scotophaeus blackwalli is also called a "mouse spider", but it is smaller and not closely related.

Description

These spiders are medium to large in size, ranging from 1 to 3 centimetres (0.39 to 1.18 in). They have a glossy carapace and high, broad heads with eyes spread out across the front of the head,^[5]^[6] and short spinnerets in the rear of the abdomen. They also exhibit sexual dimorphism. Females are entirely black, while male colouration is specific to each species. For instance, male eastern mouse spiders (M. bradleyi) have a bluish patch, while male red-headed mouse spiders (M. occatoria) are brownish or blue-black with bright red-tinged jaws.^[7]

Identification

Though they resemble most genera of the infraorder Mygalomorphae, they can be easily distinguished by the large pair of chelicerae, as well as by the placement of two small eyes in the centre of the head and three at each side, whereas in all other trapdoor spiders the eyes are grouped in a mound at the centre of the head.^[8]

Females are harder to identify than males, as they are entirely black, while males exhibit brighter colouration, usually in the form of a blueish abdomen or reddish carapace and chelicerae, or both.^[9]

Distribution and habitat

These spiders have a Gondwanan distribution, with one species found in Chile and the rest distributed throughout Australia.

Behaviour

These spiders live in trapdoor-covered burrows that can extend to nearly 30 centimetres (12 in) in depth. Females generally remain in their burrows, depending on the males to wander in search of mates. They mainly prey on insects, though they may consume other small animals as opportunity presents. Their primary predators include wasps, centipedes and scorpions.

Medical significance

Bites from these spiders are painful, but not generally dangerous. Serious envenomation is relatively rare, but bites documented in medical literature did not require antivenom treatment or involve serious symptoms. There is evidence that a mouse spider bite can potentially be as serious as that of an Australian funnel-web spider, but recorded bites are rare, despite the abundance of some species amid human habitation.^[10]

These spiders look very similar to the Australian funnel-web spiders and bites should be initially treated as funnel-web spider bites until the spider is positively identified by an expert. Australian funnel-web spider antivenom has been found to be effective in treating severe mouse spider bites.^[5]^[6] Unlike the Australian funnel-web spiders, however, the mouse spider is far less aggressive towards humans, and may often bite without releasing any venom.^[10]

Species

As of September 2024^[update] it contains 26 species:^[1]

M. bradleyi Rainbow, 1914 – Australia (NSW)
M. davidi Greenberg, Huey, Framenau & Harms, 2021 – Australia (WA)
M. dipsaca Faulder, 1995 – Australia
M. durokoppin Marsh, Stevens & Framenau, 2023 – Australia (WA)
M. faulderi Harms & Framenau, 2013 – Australia (WA)
M. gelasinos Marsh, Stevens & Framenau, 2023 – Australia (WA)
M. granulosa (O. Pickard-Cambridge, 1869) – Australia (WA)
M. harewoodi Framenau & Harms, 2017 – Australia (WA)
M. hoggi Womersley, 1943 – Australia (WA)
M. ignea Marsh, Stevens & Framenau, 2023 – Australia (WA)
M. insignis (O. Pickard-Cambridge, 1877) – Australia
M. iugum Greenberg, Huey, Framenau & Harms, 2021 – Australia (WA)
M. langlandsi Harms & Framenau, 2013 – Australia (WA)
M. leniae Miglio, Harms, Framenau & Harvey, 2014 – Australia (WA)
M. mainae Miglio, Harms, Framenau & Harvey, 2014 – Australia (WA)
M. manningensis Greenberg, Huey, Framenau & Harms, 2021 – Australia (WA)
M. melissae Miglio, Harms, Framenau & Harvey, 2014 – Australia (WA)
M. minima Marsh, Stevens & Framenau, 2023 – Australia (WA)
M. occatoria Walckenaer, 1805 – Australia
M. pinguipes Miglio, Harms, Framenau & Harvey, 2014 – Australia (WA)
M. pruinosa Levitt-Gregg, 1966 – Australia (WA, NT)
M. reflexa Rainbow & Pulleine, 1918 – Australia (SA)
M. rutraspina Faulder, 1995 – Australia (WA, SA, VIC)
M. terra Marsh, Stevens & Framenau, 2023 – Australia (WA)
M. torbayensis Main, 1996 – Australia (WA)
M. tussulena Goloboff, 1994 – Chile

Formerly included:

M. bonneti(Zapfe, 1961) (Transferred to Plesiolena )

Related Research Articles

Atracidae is a family of mygalomorph spiders, commonly known as Australian funnel-web spiders or atracids. It has been included as a subfamily of the Hexathelidae, but is now recognised as a separate family. All members of the family are native to Australia. Atracidae consists of three genera: Atrax, Hadronyche, and Illawarra, comprising 35 species. Some members of the family produce venom that is dangerous to humans, and bites by spiders of six of the species have caused severe injuries to victims. The bites of the Sydney funnel-web spider and northern tree-dwelling funnel-web spider are potentially deadly, but no fatalities have occurred since the introduction of modern first-aid techniques and antivenom.

Actinopodidae is a family of mygalomorph spiders found in mainland Australia and South America usually in open forest. Species are most common in Queensland, Australia. It includes mouse spiders, whose bites, though rare, are considered medically significant and potentially dangerous.

Actinopus is a genus of mygalomorph spiders in the family Actinopodidae. It was first described by Josef Anton Maximilian Perty in 1833 from the type species Actinopus tarsalis found in Brazil. The name is derived from Greek actin- "ray, beam" and pous "foot". It is a senior synonym of Aussereria, Closterochilus, Pachyloscelis, and Theragretes.

Plesiolena is a small genus of South American mygalomorph spiders in the family Actinopodidae. It was first described by Pablo A. Goloboff and Norman I. Platnick in 1987, and it has only been found in Chile. The name is a combination of "plesiomorphy" and the genus Missulena. As of November 2021 it contains only 2 species: P. bonneti and P. jorgelina.

Missulena occatoria, known as the red-headed mouse spider, is a species of spider found in Australia, from open forest to desert shrubland. It is the most widely distributed Missulena species, occurring throughout mainland Australia. This is possible because the spiderlings disperse via wind (ballooning). Normally this only occurs with araneomorph spiders, mygalomorph spiders normally disperse by walking. Missulena venom may be very toxic, but few cases of serious envenomation have been recorded. Most recorded bites only caused minor effects, with Australian funnel-web spider antivenom having proved effective as a treatment.

Missulena bradleyi, also known as the eastern mouse spider, is a species of spider belonging to the family Actinopodidae. The spider is endemic to the eastern coast of Australia.

Missulena insignis, commonly known as the lesser red-headed mouse spider, is a species of spider belonging to the family Actinopodidae native to Australia. The species name is derived from the Latin insignis "mark".

Missulena pruinosa, commonly known as the northern mouse spider, as others in its genus are also mouse spiders, is a species of spider belonging to the family Actinopodidae, native to Australia.

Missulena faulderi is a species of mygalomorph spiders in the family Actinopodidae. It is found in Western Australia.

Missulena hoggi is a species of mygalomorph spiders in the family Actinopodidae. It is found in Western Australia. They are mostly black with reduced red marking relative to other mouse spiders.

Missulena rutraspina is a species of mygalomorph spiders in the family Actinopodidae. It is found in Western Australia.

Missulena davidi is a species of mouse spider in the Actinopodidae family. It is endemic to Australia. It was described in 2021, with the specific epithet davidi honouring the senior author's husband, David Greenberg.

Missulena iugum is a species of mouse spider in the Actinopodidae family. It is endemic to Australia. It was described in 2021, with the specific epithet iugum referring to the strongly ridged cheliceral groove of the male spiders.

Missulena manningensis is a species of mouse spider in the Actinopodidae family. It is endemic to Australia. It was described in 2021, with the specific epithet manningensis referring to the type locality.

Missulena durokoppin is a species of mygalomorph spider in the family Actinopodidae. The species is known only from the Durokoppin Nature Reserve in Western Australia. The specific epithet durokoppin refers to the type locality.

Missulena terra is a species of mygalomorph spider in the family Actinopodidae. The species is known from mid-western Western Australia.

Missulena minima is a species of mygalomorph spider in the family Actinopodidae. The species is known only from West Perenjori Nature Reserve in Western Australia. It is a relatively small species compared to others in its genus.

Missulena gelasinos is a species of mygalomorph spider in the family Actinopodidae. The species is known from south-western to mid-western Western Australia.

Missulena ignea is a species of mygalomorph spider in the family Actinopodidae. The species is known from Cape Range National Park, Western Australia.

References

1 2 3 "Gen. Missulena Walckenaer, 1805". World Spider Catalog Version 20.0. Natural History Museum Bern. 2021. doi:10.24436/2 . Retrieved 2021-11-14.
1 2 Simon, E. (1903). Histoire naturelle des araignées (in French) (2nd ed.). Roret, Paris. pp. 669–1080. doi:10.5962/bhl.title.51973.
↑ Walckenaer, C. A. (1805). Tableau des aranéides ou caractères essentiels des tribus, genres, familles et races que renferme le genre Aranea de Linné, avec la désignation des espèces comprises dans chacune de ces divisions (in French).
↑ Goloboff, P.A. (1994). "Migoidea de Chile, nuevas o poco conocidas (Araneae: Mygalomorphae)". Revista de la Sociedad Entomológica Argentina (in Spanish). 53: 65–74.
1 2 "Mouse Spiders". Sciencentre. Retrieved 2016-06-28.
1 2 "Mouse Spiders". Australian Museum. Retrieved 2016-06-28.
↑ Womersley, H. (1943). "A revision of the spiders of the genus Missulena Walckenaer 1805". Records of the South Australian Museum. 7: 251–265.
↑ Museum, c=AU; co=Queensland Government; ou=Queensland. "Mouse Spiders". www.qm.qld.gov.au. Retrieved 2022-09-20.{{cite web}}: CS1 maint: multiple names: authors list (link)
↑ "Mouse Spiders". Spidentify. Retrieved 2022-09-20.
1 2 "Snakebite and Spiderbite Clinical Management Guidelines 2013" (PDF). NSW Government. Retrieved 2021-11-14.