Trite planiceps

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Trite planiceps
Trite.planiceps.jpg
Status NZTCS NT.svg
Not Threatened (NZ TCS)
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Arthropoda
Subphylum: Chelicerata
Class: Arachnida
Order: Araneae
Infraorder: Araneomorphae
Family: Salticidae
Subfamily: Salticinae
Genus: Trite
Species:
T. planiceps
Binomial name
Trite planiceps
Simon, 1899
Synonyms

Salticus minax
Plexippus minax
Trite minax
Ocrisiona leucocomis

Contents

Trite planiceps, commonly known as the black-headed jumping spider, is a common jumping spider (Salticidae) endemic to New Zealand and one of about 150 species of jumping spiders in New Zealand.

Taxonomy

Trite planiceps was first described in 1873 as Salticus minax from specimens collected from Riccarton Bush, Governor Bay and the North Island. [1] Trite planiceps was later described again in 1899 as its current name by Eugene Simon. [2] In 2011, T. planiceps was redescribed after DNA sequences were used to provide molecular evidence for the taxonomy of this species. [3]

The holotypes were stored at the Muséum national d'histoire naturelle but are thought to have been lost. [3]

Description

Males and females range in body length from 6 to 13.5 mm. [3] The cephalothorax and first pair of legs are jet black. The elongated abdomen is golden brown, with a central yellow stripe, and sometimes has a greenish sheen. [4] In males, the first pair of legs is elongated, there is a row of dark hairs above the frontal eyes, and the chelicerae (mouthparts) are more robust.

Distribution and habitat

Trite planiceps is endemic to New Zealand. It is widespread in the North Island, South Island and Stewart Island. It frequently inhabits flax ( Phormium) and cabbage trees ( Cordyline ). [3] This species is also commonly seen around homes. [5]

Behaviour

Hunting

Like other jumping spiders, T. planiceps relies on their very acute eyesight for hunting. The anterior median eyes are the primary eyes used for capture of stationary prey while the anterior lateral eyes are the main eyes used in chasing Both sets of eyes can be coordinated to enable switching from one hunting type to the other. [6] Trite planiceps has also been shown to seize prey in the dark, probably by means of vibratory signals. Unlike typical jumping spiders, they do not make nightly web shelters. As T. planiceps lives in low altitudes, this could be an adaptation to cool overcast winters, where they need to survive within the dim recesses of rolled-up leaves of New Zealand flax ( Phormium tenax ) and similar plants. [7] These leaves are typically one to two metres long and 5 to 10 cm wide.

Courtship

Males can use draglines left by females to locate them when they are concealed inside leaf shelters. [8] They also change from vision-based courtship in the open to vibratory courtship when mating inside a rolled-up leaf. If an immature female is within about ten days of maturing, the male will live with her for this time and then mate inside the leaf. The two are in physical contact for a while after mating, and communicate using tactile signals. Upon entering a rolled-up leaf, both sexes will tap the leaf surface with the first pair of legs and vibrate their abdomen. [9]

Nest building

Juveniles and subadults build flat, tubular silk cocoons with a door at each end inside rolled up leaves. Adult females build a silk platform 50% longer and two to three times wider than their own size before laying up to seven egg batches with 8 to 40 eggs each. Each batch is enclosed in its own silk casing. Males normally do not build nests. [9]

Other behaviour

A wide array of behavioural patterns has been observed, including ritualized male duels. [9] Trite planiceps shows increased alertness when given caffeine [10] and will assess windspeed along with visual cues when preparing to jump. [11]

Interactions with humans

Due to their docile nature, bites from Trite planiceps are very rare (members of the public frequently handle them without getting bitten). Bites from T. planiceps only occur when the spider is acting defensively as a last resort. One case study of a T. planiceps bite reported that an individual was bitten when he rolled over while in bed and was unaware of a single T. planiceps in his shirt. The bite caused a stinging like sensation in his lower shoulder blades and left two puncture marks 1mm apart. After four hours, the skin surrounding the puncture mark had formed a red halo. The swelling and tenderness settled shortly after and the redness faded after 72 hours. [12]

Conservation status

Under the New Zealand Threat Classification System, this species is listed as "Not Threatened". [13]

Related Research Articles

<span class="mw-page-title-main">Jumping spider</span> Family of spiders

Jumping spiders are a group of spiders that constitute the family Salticidae. As of 2019, this family contained over 600 described genera and over 6,000 described species, making it the largest family of spiders at 13% of all species. Jumping spiders have some of the best vision among arthropods and use it in courtship, hunting, and navigation. Although they normally move unobtrusively and fairly slowly, most species are capable of very agile jumps, notably when hunting, but sometimes in response to sudden threats or crossing long gaps. Both their book lungs and tracheal system are well-developed, and they use both systems. Jumping spiders are generally recognized by their eye pattern. All jumping spiders have four pairs of eyes, with the anterior median pair being particularly large.

<i>Portia</i> (spider) Genus of spiders

Portia is a genus of jumping spider that feeds on other spiders. They are remarkable for their intelligent hunting behaviour, which suggests that they are capable of learning and problem solving, traits normally attributed to much larger animals.

<span class="mw-page-title-main">Zebra spider</span> Species of spider

The zebra spider is a common jumping spider of the Northern Hemisphere. Their common name refers to their vivid black-and-white colouration, whilst their scientific name derives from Salticus from the Latin for “jump”, and the Greek scenicus, translating to “theatrical” or “of a decorative place,” in reference to the flashy, zebra-like coloration of the species.

<i>Portia labiata</i> Species of spider

Portia labiata is a jumping spider found in Sri Lanka, India, southern China, Burma (Myanmar), Malaysia, Singapore, Java, Sumatra and the Philippines. In this medium-sized jumping spider, the front part is orange-brown and the back part is brownish. The conspicuous main eyes provide vision more acute than a cat's during the day and 10 times more acute than a dragonfly's, and this is essential in P. labiata′s navigation, hunting and mating.

<i>Phidippus audax</i> Species of arachnid (type of jumping spider)

Phidippus audax, the Bold jumper or Daring jumping spider, is a common species of spider belonging to the genus Phidippus, a group of jumping spiders easily identified by their large eyes and their iridescent chelicerae. Like all jumping spiders, they have excellent stereoscopic vision that aids them in stalking prey and facilitates visual communication with potential mates during courting. Bold jumping spiders are native to North America and have been introduced to Hawaii, Nicobar Islands, Azores, and the Netherlands. They are typically black with a distinct white triangle on their abdomen.

<i>Ascyltus</i> Genus of spiders

Ascyltus are a genus of jumping spiders in the family Salticidae that was first described by Ferdinand Anton Franz Karsch in 1878. As of December 2020, the genus contained 10 species. Ascyltus spiders utilize their vision in courtship, hunting, and navigation. They are typically large to medium-sized salticids and often move relatively slowly. However, they are capable of agile jumps when moving, hunting, or to avoid predators. They have well developed book lungs and tracheal systems, and they are capable of utilizing both systems. Ascyltus have four pairs of eyes, with the anterior median pair being the most prominent. One distinguishable characteristic of the genus is their antero-lateral carapace, which is iridescently coloured.

<i>Phaeacius</i> Genus of spiders

Phaeacius is a spider genus of the family Salticidae, found in sub-tropical China and between India and the Malay Peninsula, including Sri Lanka, Sumatra and the Philippines. Although other spiders can jump, salticids including Phaeacius have significantly better vision than other spiders, and their main eyes are more acute in daylight than a cat's and 10 times more acute than a dragonfly's. The main eyes focus accurately on an object at distances from approximately 2 centimetres (0.79 in) to infinity, and in practice can see up to about 75 centimetres (30 in). They do not spin webs.

<i>Periegops</i> Family of spiders

Periegops is a genus of spiders with six eyes instead of the usual eight. It is the only genus in its family (Periegopidae) and has three described species. It was long considered to be a member of Sicariidae or Segestriidae until Raymond Forster elevated it to the family level in 1995.

<i>Pholcus phalangioides</i> Species of spider

Pholcus phalangioides, commonly known as the cosmopolitan cellar spider, long-bodied cellar spider, house ghost spider or one of various types called a daddy long-legs spider, is a spider of the family Pholcidae. This is the only spider species described by the Swiss entomologist Johann Kaspar Füssli, who first recorded it in 1775. Its common name of "daddy long-legs" should not be confused with a different arachnid group with the same common name, the harvestman (Opiliones), or the crane flies of the superfamily Tipuloidea.

<span class="mw-page-title-main">Spiders of New Zealand</span>

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.

<i>Phidippus clarus</i> Species of spider

Phidippus clarus, also known as the brilliant jumping spider, is a species of jumping spider found in old fields throughout eastern North America. It often waits upside down near the top of a plant, which may be useful for detecting prey, and then quickly jumps down before the prey can escape. The spider is one of 60 species in the genus Phidippus, and one of about 5,000 in the Salticidae, a family that accounts for about 10% of all spider species. P. clarus is a predator, mostly consuming insects, other spiders, and other terrestrial arthropods.

<i>Portia fimbriata</i> Species of spider

Portia fimbriata, sometimes called the fringed jumping spider, is a jumping spider found in Australia and Southeast Asia. Adult females have bodies 6.8 to 10.5 millimetres long, while those of adult males are 5.2 to 6.5 millimetres long. Both sexes have a generally dark brown carapace, reddish brown chelicerae ("fangs"), a brown underside, dark brown palps with white hairs, and dark brown abdomens with white spots on the upper side. Both sexes have fine, faint markings and soft fringes of hair, and the legs are spindly and fringed. However, specimens from New Guinea and Indonesia have orange-brown carapaces and yellowish abdomens. In all species of the genus Portia, the abdomen distends when the spider is well fed or producing eggs.

<i>Portia schultzi</i> Species of spider

Portia schultzi is a species of jumping spider which ranges from South Africa in the south to Kenya in the north, and also is found in West Africa and Madagascar. In this species, which is slightly smaller than some other species of the genus Portia, the bodies of females are 5 to 7 mm long, while those of males are 4 to 6 mm long. The carapaces of both sexes are orange-brown with dark brown mottling, and covered with dark brown and whitish hairs lying over the surface. Males have white tufts on their thoraces and a broad white band above the bases of the legs, and these features are less conspicuous in females. Both sexes have tufts of orange to dark orange above the eyes, which are fringed with pale orange hairs. Males' abdomens are yellow-orange to orange-brown with blackish mottling, and on the upper sides are black and light orange hairs, and nine white tufts. Those of females are pale yellow and have black markings with scattered white and orange-brown hairs on the upper side. P. schultzi has relatively longer legs than other Portia, and a "lolloping" gait.

Portia africana is a jumping spider found in Angola, Cameroon, the Central African Republic, Gabon, Ghana, the Ivory Coast, Sierra Leone, Zaire and Zambia. Its conspicuous main eyes provide vision more acute than a cat's during the day and 10 times more acute than a dragonfly's, and this is essential in P. africana′s navigation, hunting and mating.

<i>Trite auricoma</i> Species of spider

Trite auricoma, commonly known as the golden-brown jumping spider, is a species of jumping spider endemic to New Zealand.

Trite parvula, commonly known as the house hopper spider, is a small and relatively common jumping spider (Salticidae) endemic to New Zealand.

<i>Pardosa milvina</i> Species of arachnid

Pardosa milvina, the shore spider, is a species in the wolf spider family. They are mainly found near rivers and in agricultural areas in eastern North America. P. milvina feed on a large variety of small insects and spiders. Ground beetles such as Scarites quadriceps and large wolf spiders such as Tigrosa helluo are predators of P. milvina. P. milvina are smaller spiders with thin, long legs. This species captures prey such as arthropods with their legs and then kills them with their venom. Their predators are larger wolf spiders and beetles. P. milvina are able to detect these predators from chemotactile and vibratory cues. These spiders lose limbs when escaping from predators and they can change their preferred location in order to avoid predators. P. milvina also use chemical cues in order to mate. During their mating ritual, the male raises his legs and shakes his body. Both males and females can use silk, a chemotactile cue, for sexual communication. Additionally, female shore spiders heavily invest in their offspring, keeping them in egg sacs and carrying them for a few weeks after they are born.

<i>Periegops suterii</i> Species of spider

Periegops suterii is a species of spider in the genus Periegops that is endemic to the South Island of New Zealand.

Periegops keani is a species of spider in the genus Periegops that is endemic to the North Island of New Zealand.

<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. Powell, L. (1873). On the spiders of New Zealand. Part I. Genus Salticus. Transactions of the New Zealand Institute5: 280–286.
  2. Simon, E. (1899b). Ergebnisse einer Reise nach dem Pacific (Schauinsland 1896–1897). Arachnoideen. Zoologische Jahrbücher, Abtheilung für Systematik, Geographie und Biologie der Thiere12(4): 411–437.
  3. 1 2 3 4 Vink, Cor J., Dupérré, Nadine, McQuillan, Bryce N. (2011): The black headed jumping spider, Trite planiceps Simon, 1899 (Araneae: Salticidae): redescription including cytochrome c oxidase subunit 1 and paralogous 28S sequences. New Zealand Journal of Zoology38: 317–331.
  4. Early, John (2009). Know your New Zealand ... native insects & spiders. New Holland. p. 28. ISBN   9781869662530.
  5. Paquin, Pierre; Vink, Cor J.; Dupérré, Nadine (1 January 2010). Spiders of New Zealand: Annotated Family Key & Species List. Manaaki Whenua – Landcare Research. ISBN   978-0-478-34705-0.
  6. Forster, Lyn M. (1 January 1979). "Visual mechanisms of hunting behaviour inTrite planiceps,a jumping spider (Araneae: Salticidae)". New Zealand Journal of Zoology. 6 (1): 79–93. doi:10.1080/03014223.1979.10428351.
  7. Forster, Lyn M. (1982): Non-visual prey-capture in Trite planiceps, a jumping spider (Araneae, Salticidae). Journal of Arachnology10: 179–183. PDF
  8. Taylor, Phillip W. (1 January 1998). "Dragline-Mediated Mate-Searching in Trite planiceps (Araneae, Salticidae)". Journal of Arachnology. 26 (3): 330–334.
  9. 1 2 3 Taylor, Phillip W. & Jackson, Robert R. (1999): Habitat-adapted communication in Trite planiceps, a New Zealand jumping spider (Araneae, Salticidae). New Zealand Journal of Zoology26: 127–154. PDF Archived 3 October 2009 at the Wayback Machine
  10. Humphrey, Bonnie; Helton, William S.; Nelson, Ximena J. (7 October 2019). "Caffeine affects the vigilance decrement of Trite planiceps jumping spiders (Salticidae)". Journal of Comparative Psychology. 133 (4): 551–557. doi:10.1037/COM0000203. PMID   31589061.
  11. Aguilar-Arguello, Samuel; Taylor, Alex H.; Nelson, Ximena J. (1 January 2021). "Jumping spiders attend to information from multiple modalities when preparing to jump". Animal Behaviour. 171: 99–109. doi:10.1016/J.ANBEHAV.2020.11.013.
  12. Derraik, JGB, Sirvid, PJ and Rademaker, M. 2010. The first account of a bite by the New Zealand native spider Trite planiceps (Araneae: Salticidae). New Zealand Medical Journal, 123: 1–7.
  13. Sirvid, P. J.; Vink, C. J.; Fitzgerald, B. M.; Wakelin, M. D.; Rolfe, J.; Michel, P. (1 January 2020). "Conservation status of New Zealand Araneae (spiders), 2020" (PDF). New Zealand Threat Classification Series. 34: 1–37.