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Trite auricoma
Conservation status
	; Not Threatened (NZ TCS)
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Arthropoda
Subphylum:	Chelicerata
Class:	Arachnida
Order:	Araneae
Infraorder:	Araneomorphae
Family:	Salticidae
Subfamily:	Salticinae
Genus:	Trite
Species:	T. auricoma
Binomial name
	Trite auricoma; (Urquhart, 1886)
Synonyms
	Attus auricomus Urquhart, 1886; Plexippus capillatus Urquhart, 1890; Attus suffuscus Urquhart, 1893; Attus kirkii Urquhart, 1893; Attus adustus Urquhart, 1893; Trite vafra Dalmas, 1917;

Trite auricoma, commonly known as the golden-brown jumping spider, is a species of jumping spider endemic to New Zealand.^[1]

Description

Adults are 8.4mm to 8.8mm in length.^[2] The cephalothorax is coloured dark brown and is shaped rectangular and flattened.^[3] The abdomen tends to be patterned with grey-brown and orange colours.^[3] When fully mature, males have a yellow clypeal band that resembles a mustache.^[4] Females do not have this feature.^[4] Males also have a slimmer body and longer frontal legs.^[4]

Male Trite auricoma with "mustache" that identifies it as a male. — Male *Trite auricoma* with "mustache" that identifies it as a male.

Taxonomy

Trite auricoma was first described by Arthur T. Urquhart in 1886 as Attus auricomus (Urquhart, 1886).^[5] Urquhart proceeded to unknowingly describe T. auricoma synonyms several times as Plexippus capillatus, Attus suffuscus, Attus kirkii and Attus adustus in 1890 and 1893, respectively.^[6]^[7] Independently, in 1917, Raymond Comte de Dalmas described another synonym, Trite vafra, from samples he collected with Eugène Simon after visiting New Zealand from 1912 to 1913.^[8] In 1935, after examining type specimens from Canterbury Museum, Elizabeth Bangs Bryant placed A. auricomus in the Trite genus and renamed the species as T. auricoma.^[2] Bryant also recognized P. capillatus, A. suffuscus, A. kirkii, A. adustus and T. vafra as synonyms of T. auricoma.

Etymology

In Latin, the species name "auricoma" translates to "gold hair" ("auri" translates to gold, "coma" translates to hair).^[9] This is likely a reference to the gold-brown colour of the spider.^[4]

Distribution and habitat

Trite auricoma is widely distributed throughout New Zealand. T. auricoma can often be found in rolled up leaves of flax (Phormium) or underneath dropped cabbage tree (Cordyline) leaves. T. auricoma can also be found underneath stones, in vegetation and also on the ground.^[4]

Diet

Like all spiders, Trite auricoma is an obligate carnivore.^[10] In experimental conditions, juvenile T. auricoma has been observed feeding on aphids and small flies such as Drosophila.^[10] In experimental conditions, T. auricoma were more selective about prey choice, and fed on small flies and tachnids.^[10] T. auricoma also have to learn what is good to eat.^[4] It has been reported that juveniles will only eat slaters once, but then never again.^[4]

Behaviour

Hunting

Like most salticidae, Trite auricoma is a visual predator. If there is a fly within 15 cm of the front of the spider, the spider becomes alert. In the first stage, the legs and abdomen are shifted and straightened. The hind legs then become drawn in and the spider begins to slowly move towards the prey. Once the spider is 3–4 cm from its prey, it leaps and pierces the prey with its fangs. If a fly or other prey appears behind the spider, the spider will turn around and begin stalking. If the prey moves during stalking, the spider will turn its cephalothorax so that it is pointed at the prey. The abdomen will then also be moved into line with the cephalothorax and stalking will be resumed. If the prey begins to flee, then the spider will give chase and pounce.^[4]

Hunger is thought to initiate hunting behaviour.^[11]

Juvenile T. auricoma must learn to perfect the movements required in hunting. Juveniles usually miss their prey the first few times they hunt.^[4]

Interactions with conspecifics

The spiderlings of T. auricoma do not react to each other while they are in the egg sac. However, once they have emerged, confrontations between juveniles result in one or both spiders raising their front legs. At this point, both spiders back away.^[11]

Parasites

Trite auricoma has been observed being parasitized by Priocnemis nitidiventris, which paralyses the spider and feeds it to its young.^[12]

Conservation status

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

References

^ "Jumping Spider (Golden brown) (Trite auricoma)". Taranaki Educational Resource: Research, Analysis and Information Network. Retrieved 27 May 2012.
^ ^a ^b Bryant, E.B. (1935). "Notes on some of Urquhart's species of spiders". Records of the Canterbury Museum. 4: 53–70.
^ ^a ^b Zabka, M. (1988). "Salticidae (Araneae) of Oriental, Australian and Pacific regions, III". Annales Zoologici, Warszawa. 41: 421–479.
^ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ Forster, Ray; Forster, Lyn (1999). Spiders Of New Zealand And Their World Wide Kin. Otago, New Zealand: University of Otago Press. pp. 119–124. ISBN 1-877372-13-7.
^ Urquhart, A.T (1886). "On the spiders of New Zealand". Transactions of the New Zealand Institute. 18: 184–204.
^ Urquhart, A.T. (1890). "Descriptions of new species of Araneidae". Transactions of the New Zealand Institute. 22: 239–266.
^ Urquhart, A.T. (1893). "Descriptions of new species of Araneidae". Transactions of the New Zealand Institute. 25: 165–190.
^ Dalmas, R. de (1917). "Araignées de Nouvelle-Zélande". Annales de la Société Entomologique de France. 86: 317–430.
^ "Online Latin Dictionary".
^ ^a ^b ^c Forster, Lyn M. (1977-12-01). "Some factors affecting feeding behaviour in young Trite auricoma spiderlings (Araneae: Salticidae)". New Zealand Journal of Zoology. 4 (4): 435–443. doi:10.1080/03014223.1977.9517967. ISSN 0301-4223.
^ ^a ^b Forster, Lyndsay M. (1977-03-01). "A qualitative analysis of hunting behaviour in jumping spiders (Araneae: Salticidae)". New Zealand Journal of Zoology. 4 (1): 51–62. doi:10.1080/03014223.1977.9517936. ISSN 0301-4223.
^ Harris, A. C. (Anthony Clifford) (1987). Pompilidae (Insecta: Hymenoptera). New Zealand. Department of Scientific and Industrial Research. Wellington, N.Z.: Science Information Publishing Centre, DSIR. ISBN 0-477-02501-3. OCLC 17796347.
^ Sirvid, P. J.; Vink, C. J.; Fitzgerald, B. M.; Wakelin, M. D.; Rolfe, J.; Michel, P. (2020-01-01). "Conservation status of New Zealand Araneae (spiders), 2020" (PDF). New Zealand Threat Classification Series. 34: 1–37.