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Overview

Distribution

Scutigera coleoptrata, the common house centipede, is thought to be native to the Mediterranean. Today it can be found throughout Europe, Asia, and North America.

Biogeographic Regions: nearctic (Introduced ); palearctic (Introduced , Native ); oriental (Introduced )

Other Geographic Terms: holarctic

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National Distribution

Canada

Origin: Exotic

Regularity: Regularly occurring

Currently: Present

Confidence: Confident

Type of Residency: Year-round

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Physical Description

Morphology

House centipedes are brown or black in color. Like all arthropods, S. coleoptrata has an exoskeleton made of chitin and sclerotin. Its dorsal-ventrally flattened body is divided into fifteen segments with one pair of legs per segment. The first pair of legs is modified into fangs used for capturing prey and as protection. There are three dorsal longitudinal stripes, and the legs are banded. They have very well developed antennae and compound eyes. Most range from one to six cm in length and are very quick runners in comparison with other centipedes.

Range length: 1 to 6 cm.

Other Physical Features: ectothermic ; heterothermic ; bilateral symmetry ; venomous

  • Arnett Jr., Ph.D., R. 1985. American Insects: A Handbook of the Insects of America North of Mexico. New York, New York, USA: Van Nostrand Reinhold Company.
  • Grzimek, B. 1972. Grzimek's Encyclopedia of Ecology. New York: Van Nostrand Reinhold Company.
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Ecology

Habitat

Scutigera coleoptrata prefers temperate climates and are often found in buildings. They can apparently survive in many humid habitats, as long as there is a place to hide, sufficient humidity, and enough food. They are often found in dark, humid areas such as crevices under rocks and caves. In residences they're more commonly found in basements and bathrooms (probably because of higher humidity there).

Habitat Regions: temperate ; terrestrial

Terrestrial Biomes: savanna or grassland ; forest

Wetlands: marsh ; swamp ; bog

Other Habitat Features: urban ; suburban ; riparian ; caves

  • Buchsbaum, R., M. Buchsbaum, J. Pearse, V. Pearse. 1987. Animals Without Backbones. Chicago: The University of Chicago Press.
  • Drees, B., Jackman. 1998. A Field Guide to CommonTexas Insects. Houston, Texas: Gulf Publishing Company.
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Trophic Strategy

Scutigera coleoptrata is carnivorous, eating worms, snails, cockroaches, silverfish, fly larvae, and other arthropods. It senses its prey using its antennae which have scent and touch receptors on them. House centipedes then use their fangs to hold the prey while injecting poison with the modified front legs. After eating, S. coleoptrata retreats to a safe place to let the food digest.

Animal Foods: insects; terrestrial non-insect arthropods; mollusks; terrestrial worms

Primary Diet: carnivore (Insectivore )

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Life History and Behavior

Life Cycle

Immature S. coleoptrata hatch from the egg appearing very similar to the adults, although they have only four pairs of legs. As they develop they pass through five larval instars, with each molt gaining more leg pairs. After their fifth molt, they have all fourteen pairs of legs and are mature.

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Reproduction

Scutigera coleoptrata is stimulated by pheromones and sound signals. During courtship, males circle and tap other centipedes looking for a receptive female. Once a mate is found, the male spins a silk pad in which he places his sperm. The female then takes the sperm pouch and fertilizes her eggs. Courtship and reproduction occurs during the warmer months of the year.

Female house centipedes lay their eggs in the soil and cover them up with a sticky substance. Courtship and reproduction occurs during the warmer months of the year.

In laboratory observations, females laid an average of 63 eggs, and a maximum of 151 eggs.

Key Reproductive Features: iteroparous ; seasonal breeding ; gonochoric/gonochoristic/dioecious (sexes separate); sexual ; fertilization (Internal ); oviparous

For about two weeks after the baby centipedes have hatched, the mother and her offspring live in the same place, providing some degree of protection for the young.

Parental Investment: pre-fertilization (Protecting: Female); pre-hatching/birth (Protecting: Female); pre-independence (Protecting: Female)

  • O'Toole, C. 1986. The Encyclopedia of Insects. New York: Facts on File Publications.
  • Drees, B., Jackman. 1998. A Field Guide to CommonTexas Insects. Houston, Texas: Gulf Publishing Company.
  • Barnes, J. 2003. "House Centipede" (On-line). University of Arkansas Arthropod Museum Notes. Accessed March 23, 2005 at http://www.uark.edu/depts/entomolo/museum/house_centipede.html.
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Molecular Biology and Genetics

Molecular Biology

Statistics of barcoding coverage: Scutigera coleoptrata

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 0
Specimens with Barcodes: 3
Species With Barcodes: 1
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Conservation

Conservation Status

US Federal List: no special status

CITES: no special status

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National NatureServe Conservation Status

Canada

Rounded National Status Rank: NNA - Not Applicable

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NatureServe Conservation Status

Rounded Global Status Rank: GNR - Not Yet Ranked

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Relevance to Humans and Ecosystems

Benefits

House centipedes are not aggressive, but can bite people in self-defense. Often their fangs are not strong enough to break the skin. If they do get through skin, the venom injected can cause a painful bite, comparable to a honeybee sting.

As relatively large and active arthropods, many people consider their presence indoors a nuisance.

Negative Impacts: injures humans (bites or stings, venomous ); household pest

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House centipedes eat many pest organisms, such as cockroaches (Blattodea) and silverfish (Lepismatidae).

Positive Impacts: controls pest population

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Wikipedia

Scutigera coleoptrata

Scutigera coleoptrata – one of several species commonly known as the house centipede – is a typically yellowish-grey centipede with up to 15 pairs of legs. Originating in the Mediterranean region, the species has spread to other parts of the world, where it can live in human homes.[1] It is an insectivore; it kills and eats other arthropods, such as insects and arachnids.

Morphology[edit]

The body of an adult S. coleoptrata is 25 mm (1 in) to 35 mm (1.5 in) in length.[2] Up to 15 pairs of long legs are attached to the rigid body. Together with the antennae they give the centipede an appearance of being 75 mm (3 in) to 100 mm (4 in) in length.[2] The delicate legs enable it to reach surprising speeds of up to 0.4 meters per second (1.3 ft/s)[3] running across floors, up walls and along ceilings. Its body is yellowish-grey and has three dark dorsal stripes running down its length; the legs also have dark stripes. Unlike most other centipedes, house centipedes and their close relatives have well-developed faceted eyes. S. coleoptrata has developed automimicry in that its hind legs present the appearance of antennae. When the centipede is at rest, it is not easy to tell its front from its back.

Reproduction and development[edit]

House centipedes lay their eggs in spring. In a laboratory observation of 24 house centipedes, an average of 63 and a maximum of 151 eggs were laid. As with many other arthropods, the larvae look like miniature versions of the adult, albeit with fewer legs. Young centipedes have four pairs of legs when they are hatched. They gain a new pair with the first molting, and two pairs with each of their five subsequent moltings. Adults with 15 pairs of legs retain that number through three more molting stages (sequence 4-5-7-9-11-13-15-15-15-15 pairs).[4] They live anywhere from three to seven years, depending on the environment. They can start breeding in their third year. To begin mating, the male and female circle around each other. They initiate contact with their antennae. The male deposits his sperm on the ground and the female then uses it to fertilize her eggs.

Behavior and ecology[edit]

Closeup of the head showing modified legs

House centipedes feed on spiders, bed bugs, termites, cockroaches, silverfish, ants, and other household arthropods. They administer venom through modified legs (forcipules). These are not part of their mandibles, so strictly speaking they sting rather than bite. They are mostly nocturnal hunters. Despite their developed eyes, they seem to rely mostly on their antennae when hunting. Their antennae are sensitive to both smells and tactile information. They use both their mandibles and their legs for holding prey. This way they can deal with several small insects at the same time. To capture prey they either jump onto it or use their legs in a technique described as "lassoing". Using their legs to beat prey has also been described.[5] In a feeding study, S. coleoptrata showed the ability to distinguish between possible prey. They avoid dangerous insects. They also adapted their feeding pattern to the hazard the prey might pose to them. For wasps, they retreat after applying the venom to give it time to take effect.[5] When the centipede is in danger of becoming prey itself, it can detach any legs that have become trapped. House centipedes have been observed to groom their legs by curling around and grooming them with their forcipules.

In 1902, C. L. Marlatt, an entomologist with the United States Department of Agriculture, wrote a brief description of the house centipede:[1]

It may often be seen darting across floors with very great speed, occasionally stopping suddenly and remaining absolutely motionless, presently to resume its rapid movements.

Habitat[edit]

Outdoors, house centipedes prefer to live in cool, damp places. Centipede respiratory systems do not provide any mechanism for shutting the spiracles, and that is why they need an environment that protects them from dehydration and excessive cold. Most live outside, primarily under large rocks, piles of wood, and especially in compost piles. Within the home, these centipedes are found in almost any part of the house. Most commonly they are encountered in basements, bathrooms, and lavatories, which tend to be humid, but they can also be found in drier places like offices, bedrooms and dining rooms. The greatest likelihood of encountering them is in spring, when they come out because the weather gets warmer, and in autumn/fall, when the cooling weather forces them to find shelter in human habitats.

Distribution[edit]

S. coleoptrata is indigenous to the Mediterranean region, but it has spread through much of Europe, Asia, North America and South America. It is thought to have first been introduced to the Americas in Mexico and Guatemala and now it reaches north into Canada and south to Argentina.[5]

In the United States, it spread north from the southern states, reaching Pennsylvania in 1849, New York in 1885, and Massachusetts and Connecticut in about 1890. In 2009, its distribution extended from Virginia in the east to the coast of California in the west.

In 2011 it was sighted in Chile, in the Metropolitan and Los Lagos regions.[6]

In South Africa, they have been found in the Western Cape, in and around Cape Town (sightings have been reported in Pinelands, Vredehoek, Mowbray, Edgemead, Green Point, Cape Town, Zonnebloem, Cape Town, Woodstock, Cape Town, Stellenbosch and Gordon's Bay) and also in KwaZulu-Natal, in the city of Pietermaritzburg. They are also found around the Garden Route, including but not limited to, Oudtshoorn, Mossel Bay, George and Knysna. They have also recently been found in Bloemfontein in the Free State.

In 2013 they have also been recorded in Lichinga (Mozambique) and Lujeri Tea Estate, Mulanje, Southern Malawi.

They have been found in eastern and southern Australia, from Perth to Adelaide, South Australia, to Sydney, New South Wales and in Tasmania. Other countries they have been found in include New Zealand, Japan, as well as South Korea.

Biological details[edit]

The faceted eyes of S. coleoptrata are sensitive to daylight as well as very sensitive to ultraviolet light.[7] They were shown to be able to visually distinguish between different mutations of Drosophila melanogaster.[8] How this ability fits with its nocturnal lifestyle and underground natural habitat is still under study. They do not instantly change direction when light is suddenly shone at them, but retreat to a darker hiding spot.

Some of the plates covering the body segments fused and became smaller during the evolution to the current state of S. coleoptrata. The resulting mismatch between body segments and dorsal plates (tergites) is the cause for this centipede's rigid body.

Relation between body segments, dorsal plates (Tergites), and leg pairs
Tergite1234567891011
Segments123, 45, 67, 8, 910, 1112, 1314, 15161718

(telson)

Leg pairsForcipules12, 34, 56, 7, 89, 1011, 1213, 1415 (antenna-like snare legs)(gonopod)(anus)

Tergites 10 and 11 are not fully developed and segment 18 does not have a sternite. This model deviates from descriptions by Lewis who identified only 7 tergites and 15 segments.[9]

Another feature that sets S. coleoptrata apart from other centipedes is that their hemolymph was found to contain proteins for transporting oxygen.

The mitochondrial genome of S. coleoptrata has been sequenced. This opened up discussions on the taxonomy and phylogeny of this and related species.[10]

Interaction with humans[edit]

Unlike its shorter-legged but much larger tropical cousins, S. coleoptrata can live its entire life inside a building, usually the ground levels of homes. They are generally considered harmless to humans.[11] Bites (stings) are extremely uncommon, and the forcipules of most house centipedes are not strong enough to penetrate human skin. Stings are generally no worse than a bee's sting, with its venom causing redness and mild to severe swelling.[12][2]

Techniques for eliminating centipedes from homes include drying up the areas where they thrive, eliminating large indoor insect populations, sealing cracks in the walls, and seeking the assistance of an exterminator.

References[edit]

  1. ^ a b Steve Jacobs (2009). House Centipede. Pennsylvania State University. 
  2. ^ a b c Steve Jacobs (2006). "House Centipedes". 
  3. ^ "Centipedes: Chilopoda - House Centipede (Scutigera coleoptrata): Species Accounts". 2004. 
  4. ^ Walter Ebeling. "Chapter 9, Part 1: Spiders and Ants". Urban Entomology. University of California. pp. 323–353. ISBN 0-931876-19-2. 
  5. ^ a b c Lewis (2007), pp. 185–186.
  6. ^ E. I. Faúndez (2011). "On the presence of Scutigera coleoptrata (Linnaeus, 1758) (Chilopoda: Scutigeromorpha: Scutigeridae) in the Metropolitan Region, Chile". Boletín de la Sociedad Entomológica Aragonesa 49: 336. 
  7. ^ Victor Benno Meyer-Rochow, Carsten H. G. Müller & Magnus Lindström (2006). "Spectral sensitivity of the eye of Scutigera coleoptrata (Linnaeus, 1758) (Chilopoda: Scutigeromorpha: Scutigeridae)". Applied Entomology and Zoology 41 (1): 117–122. doi:10.1303/aez.2006.117. 
  8. ^ Lewis (2007), p. 120.
  9. ^ Richard Fox (June 28, 2006). "Scutigera coleoptrata". Lander University. Retrieved April 1, 2010. 
  10. ^ Enrico Negrisolo, Alessandro Minelli & Giorgio Valle (2004). "The mitochondrial genome of the house centipede Scutigera and the monophyly versus paraphyly of myriapods". Molecular Biology and Evolution 21 (4): 770–780. doi:10.1093/molbev/msh078. PMID 14963096. 
  11. ^ Eric R. Eaton (2007). Kaufman Field Guide to Insects of North America. HMCo Field Guides. p. 26. ISBN 0-618-15310-1. Retrieved July 3, 2009. 
  12. ^ Jeffrey K. Barnes (2003). "House Centipede". 

Bibliography[edit]

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