Scutigera coleoptrata

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House centipede
Scutigera coleoptrata MHNT .jpg
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Arthropoda
Subphylum: Myriapoda
Class: Chilopoda
Order: Scutigeromorpha
Family: Scutigeridae
Genus: Scutigera
Species:
S. coleoptrata
Binomial name
Scutigera coleoptrata

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

Contents

Etymology

In 1758, Carl Linnaeus described the species in the tenth edition of his Systema Naturae , giving the name Scolopendra coleoptrata, writing that it has a "coleopterated thorax" (similar to a coleopter). [2] In 1801, Jean-Baptiste Lamarck separated scutigera from scolopendra, calling this species Scutigera coleoptrata. [3] The word scutigera comes from Latin gerere'to bear' and scutum'shield', because of the shape of the plates in the back of the chilopod. [4]

Morphology

The body of an adult Scutigera coleoptrata is typically 25 to 35 mm (1.0 to 1.4 in) in length, although larger specimens are sometimes encountered. [5] 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 to 100 mm (3 to 4 in) in length. [5] The delicate legs enable it to reach surprising speeds of up to 0.4 meters per second (1.3 ft/s)[ citation needed ] 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. S. coleoptrata has developed automimicry in that its tail-like hind legs present the appearance of antennae. When the centipede is at rest, it is not easy to tell its cranial end from its caudal end.

Unlike most other centipedes, house centipedes and their close relatives have well-developed faceted eyes.

Reproduction and development

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). [6]

House centipedes 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

Closeup of the head showing forcipules HouseCentipedeCloseup.jpg
Closeup of the head showing forcipules
Scutigera coleoptrata resting on a wall. The antennae are approximately 2 cm long. House centipede Scutigera coleoptrata on the wall.tif
Scutigera coleoptrata resting on a wall. The antennae are approximately 2 cm long.
Head close-up magnified House centipede, face, beltsville 2014-04-21-18.44.09 ZS PMax (14053176887).jpg
Head close-up magnified

House centipedes feed on spiders, bed bugs, termites, cockroaches, silverfish, ants, and other household arthropods. They administer venom through 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. [7] Like other centipedes they can stridulate.

In a feeding study, S. coleoptrata showed the ability to distinguish between possible prey, avoiding dangerous insects. They also adapted their feeding pattern to the type of hazard the prey might pose to them. For wasps, they retreat after applying the venom to give it time to take effect. [7] 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: [8]

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, often darting directly at inmates of the house, particularly women, evidently with a desire to conceal itself beneath their dresses, and thus creating much consternation.

Habitat

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 or leaves, in barkdust and especially in compost piles. They often emerge from hiding during the watering of gardens or flowerbeds. These centipedes can be found in almost any part of the house, although they are usually encountered in dark or dimly lit areas such as basements and garages. Inside the home, they can be found in bathrooms and lavatories, which tend to be humid, but they can also be found in drier places like offices, bedrooms and dining rooms. They are usually seen crawling along the ground or floor, but they are capable of climbing walls. The greatest likelihood of encountering them is in spring, when they emerge due to warmer weather and in autumn/fall, when the cooling weather forces them to seek shelter in human habitats.

Distribution

S. coleoptrata is indigenous to the Mediterranean region, but it has spread through much of Europe, Asia, North America and South America. [7] It has also been introduced to Australia. [9]

Biological details

The faceted eyes of S. coleoptrata are sensitive to daylight and very sensitive to ultraviolet light. [10] They were shown to be able to visually distinguish between different mutations of Drosophila melanogaster . [11] 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 will 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. [12]

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. [13]

Interaction with humans

Unlike its shorter-legged but larger tropical cousins, S. coleoptrata can live its entire life inside a building, usually on the ground levels of homes. Many homeowners may be unsettled by house centipedes due to their speed and appearance, but they are not routinely dangerous to humans. [14] They are not aggressive and usually flee when disturbed or revealed from cover. Sting attempts are therefore rare unless the centipede is cornered or aggressively handled. Its small forcipules have difficulty penetrating skin, and even successful stings produce only mild, localized pain and swelling, similar to a bee sting. Allergic reactions to centipede stings have been reported, but these are rare; most stings heal quickly and without complication. [5] [15]

Related Research Articles

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Centipedes are predatory arthropods belonging to the class Chilopoda of the subphylum Myriapoda, an arthropod group which includes millipedes and other multi-legged animals. Centipedes are elongated segmented (metameric) creatures with one pair of legs per body segment. All centipedes are venomous and can inflict painful stings, injecting their venom through pincer-like appendages known as forcipules or toxicognaths, which are actually modified legs instead of fangs. Despite the name, no centipede has exactly 100 pairs of legs; number of legs ranges from 15 pairs to 191 pairs, always an odd number.

<span class="mw-page-title-main">Myriapoda</span> Subphylum of arthropods

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<span class="mw-page-title-main">Stinger</span> Sharp organ capable of injecting venom

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<i>Scolopendra heros</i> Species of centipede

Scolopendra heros, commonly known as the Arizona desert centipede, giant desert centipede, giant Sonoran centipede, Texas black-tailed centipede, Texas redheaded centipede, and giant redheaded centipede, is a species of North American centipede found in the Southwestern United States and Northern Mexico.

<i>Scutigera</i> Genus of centipedes

Scutigera is a centipede genus in the scutigeromorph family Scutigeridae, a group of centipedes with long limbs and true compound eyes. It compose of more than 30 species, including the most common and well-studied Scutigera coleoptrata.

<i>Scolopendra gigantea</i> Species of Chilopoda (centipede)

Scolopendra gigantea, also known as the Peruvian giant yellow-leg centipede or Amazonian giant centipede, is a centipede in the genus Scolopendra. It is the largest centipede species in the world, with a length exceeding 30 centimetres (12 in). Specimens may have 21 or 23 segments. It is found in various places throughout South America and the extreme south Caribbean, where it preys on a wide variety of animals, including other sizable arthropods, amphibians, mammals and reptiles.

<span class="mw-page-title-main">Chinese red-headed centipede</span> Subspecies of centipede

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<i>Scolopendra</i> Genus of centipedes

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<span class="mw-page-title-main">Scolopendromorpha</span> Order of centipedes

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<span class="mw-page-title-main">Scutigeromorpha</span> Order of centipedes

Scutigeromorpha is an order of centipedes also known as house centipedes. These centipedes are found in the temperate and tropical parts of every continent except Antarctica, with their distribution significantly expanded by the introduction of the Mediterranean species Scutigera coleoptrata throughout Europe, Asia, and North America. The common species S. coleoptrata is a typical representative of this order, lying in wait for other arthropods, then seizing prey using great speed, and all species in this order reflect adaptations for this mode of life.

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A very numerous and various class consisting of small animals, breathing through lateral spiracles, armed on all sides with a bony skin, or covered with hair; furnished with many feet, and moveable antennae, which project from the head, and are the probable instruments of sensation.

<i>Scolopendra morsitans</i> Species of centipede

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<i>Scolopendra dehaani</i> Centipede species

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<i>Scolopendra japonica</i> Centipede species

Scolopendra japonica, formerly classified as Scolopendra subspinipes japonica, is a species of scolopendrid centipede mostly found in Japan, although specimens have been reported in other parts of Eastern Asia such as China, Taiwan, Myanmar, Cambodia, and Laos. They usually grow between 7.5 and 13 centimetres in length. It is known by the common names Japanese giant centipede and blue-head centipede.

<i>Scolopendra dawydoffi</i> Species of centipede

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References

  1. Ricks, Winston. "Scutigera Coleoptrata". Animal Diversity. Regents of the University of Michigan. Retrieved 28 March 2015.
  2. Linné, Carl von; Salvius, Lars (1758). Caroli Linnaei...Systema naturae per regna tria naturae :secundum classes, ordines, genera, species, cum characteribus, differentiis, synonymis, locis. Vol. v.1. Holmiae: Impensis Direct. Laurentii Salvii.
  3. Lamarck, Jean-Baptiste (1801). Systême des animaux sans vertèbres; ou, Tableau général des classes, des classes, des orres et des genres de ces animaux. Paris: L'Auteur.
  4. "Scutigera - Wiktionary". en.wiktionary.org. 4 June 2018. Retrieved 2020-09-23.
  5. 1 2 3 Steve Jacobs (March 13, 2017). "House Centipedes". Extension. Pennsylvania State University . Retrieved 2021-06-08.
  6. Walter Ebeling (1978). "Chapter 9, Part 1: Spiders and Ants". Urban Entomology. University of California. pp. 323–353. ISBN   978-0-931876-19-6. Archived from the original on 2017-07-08. Retrieved 2009-02-09.
  7. 1 2 3 Lewis (2007), pp. 185–186.
  8. Steve Jacobs (2009). House Centipede (PDF). Pennsylvania State University.
  9. "Species Scutigera coleoptrata Linnaeus, 1758". Australian Faunal Directory. Dept of Climate Change, Energy, the Environment and Water, Australia. 2010. Retrieved 15 March 2023.
  10. 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 .
  11. Lewis (2007), p. 120.
  12. Richard Fox (June 28, 2006). "Scutigera coleoptrata". Lander University. Archived from the original on September 1, 2006. Retrieved April 1, 2010.
  13. 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. hdl: 11577/2452361 . PMID   14963096.
  14. Eric R. Eaton (2007). Kaufman Field Guide to Insects of North America. HMCo Field Guides. p. 26. ISBN   978-0-618-15310-7 . Retrieved July 3, 2009.
  15. Jeffrey K. Barnes (May 22, 2003). "House centipede". Arthropod Museum. University of Arkansas . Archived from the original on 2017-06-01.

Bibliography