Dolomedes tenebrosus

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Dark fishing spider
Dolomedes tenebrosus 1 PEM.jpg
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Arthropoda
Subphylum: Chelicerata
Class: Arachnida
Order: Araneae
Infraorder: Araneomorphae
Family: Dolomedidae
Genus: Dolomedes
Species:
D. tenebrosus
Binomial name
Dolomedes tenebrosus
(Hentz, 1844) [1]
Synonyms
  • D. idoneusMontgomery, 1902
  • D. vernalisEmerton, 1909

Dolomedes tenebrosus, known as the dark fishing spider, is a species of fishing spider found in the United States and Canada. [1] [2]

Contents

Description

Female found under a log pile in Ohio, USA Dark Fishing Spider (Dolomedes tenebrosus).jpg
Female found under a log pile in Ohio, USA
Eye arrangement Dolomedes tenebrosus eyeset.jpg
Eye arrangement

Females are 15–26 millimetres (0.59–1.02 in) (excluding legs); and males are 7–13 millimetres (0.28–0.51 in). Leg lengths range from 50–90 millimetres (2.0–3.5 in). The spider is a pale to dark brown colour with several chevron markers and lighter stripes around its legs, similar to D. scriptus . [2] The legs are banded with brown/black annulations on the femora and reddish-brown/black annulations on the tibia. [3] During copulation, females of the species practice sexual cannibalism on their male counterparts. Research shows that the males' self-sacrifice through consumption by the female increases the chance of survivorship of future offspring. [4]

Habitat

They are found in wooded areas and dwell on trees. [3]

Bite

It is capable of biting humans, but typically flees when approached. In most cases, the bite is no more severe than a bee or wasp sting. [3]

Related Research Articles

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<i>Dolomedes</i> Genus of spiders

Dolomedes is a genus of large spiders of the family Dolomedidae. They are also known as fishing spiders, raft spiders, dock spiders or wharf spiders. Almost all Dolomedes species are semiaquatic, with the exception of the tree-dwelling D. albineus of the southeastern United States. Many species have a striking pale stripe down each side of the body.

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<i>Peucetia viridans</i> Species of spider

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<span class="mw-page-title-main">Sexual cannibalism</span> Practice of animals eating their own mating partners

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<i>Dolomedes minor</i> Species of spider

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<i>Dolomedes scriptus</i> Species of spider

Dolomedes scriptus is a fishing spider found in the United States and Canada, known as the striped fishing spider. Female spiders can grow to be over 6 cm in legspan. The spider is a pale brown colour with lighter stripes around its legs and a stripe down each side of the body. It is similar to D. tenebrosus.

<span class="mw-page-title-main">Six-spotted fishing spider</span> Species of spider

The six-spotted fishing spider is a species of spider in the family Dolomedidae. Found in wetland habitats throughout North America, these spiders are usually seen scampering along the surface of ponds and other bodies of water. They are also referred to as dock spiders because they can sometimes be witnessed quickly vanishing through the cracks of boat docks. D. triton gets its scientific name from the Greek mythological god Triton, who is the messenger of the big sea and the son of Poseidon.

<i>Oxyopes salticus</i> Species of spider

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<i>Pisaurina mira</i> Species of spider

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<span class="mw-page-title-main">Palpal bulb</span> Part of a pedipalp of a male spider

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, giving the spider an appearance often described as like wearing boxing gloves. The palpal bulb does not actually produce sperm, being used only to transfer it to the female. Palpal bulbs are only fully developed in adult male spiders and are not completely visible until after the final moult. In the majority of species of spider, the bulbs have complex shapes and are important in identification.

<i>Dolomedes schauinslandi</i> Species of spider

Dolomedes schauinslandi or the Rangatira spider is a large spider of the family Dolomedidae. It is only found on South East Island (Rangatira), Houruakopara and Mangere Islands in the Chatham Islands, New Zealand. It is one of New Zealand's largest and rarest spiders.

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<i>Dolomedes dondalei</i> Species of spider endemic to New Zealand

Dolomedes dondalei is a species of large fishing spider endemic to the main islands of New Zealand. It is a nocturnal hunter, feeling the water surface for vibrations, and catches insects and even small fishes – the only New Zealand Dolomedes species able to do so.

References

  1. 1 2 "Taxon details Dolomedes tenebrosus Hentz, 1844". World Spider Catalog. Natural History Museum Bern. Retrieved 2017-09-13.
  2. 1 2 Weber, Larry. (2003). Spiders of the North Woods. Duluth, MN:Kollath+Stensaas. pp. 104–105.
  3. 1 2 3 "Dolomedes tenebrosus". Penn State College of Agricultural Sciences.
  4. Schwartz, Steven K.; Wagner, William E.; Hebets, Eileen A. (2016). "Males Can Benefit from Sexual Cannibalism Facilitated by Self-Sacrifice". Current Biology. 26 (20): 2794–2799. doi: 10.1016/j.cub.2016.08.010 . PMID   27720621.

Further reading