Arangina cornigera explained

Arangina cornigera is a species of Dictynidae spider that is endemic to New Zealand.^[1]

Taxonomy

This species was described as "Dictyna cornigera" and "Dictyna nigella" in 1917 by Raymond Comte de Dalmas from female and male specimens collected in Canterbury.^[2] It has undergone several revisions since its first description.^{[3] [4] [5]} The species was most recently revised in 1970. The holotype is stored in the National Museum of Natural History, France.

Description

The male is recorded at 3mm in length whereas the female is 3.12mm. The cephalothorax is sooty brown, almost black and is covered in a patch of white hairs. The abdomen is grey with chevrons dorsally.

Distribution

This species is only known from the South Island of New Zealand. Like all Arangina, it lives under stones along rivers.

Conservation status

Under the New Zealand Threat Classification System, this species is listed as "Not Threatened".^[6]

Notes and References

1. Forster . R.R. . 1970 . The spiders of New Zealand. Part III . Otago Museum Bulletin . 3 . 1-184.
2. Dalmas . R. de. . 1917 . Araignées de Nouvelle-Zélande . Annales de la Société Entomologique de France . 86 . 317-430.
3. Chamberlain . G . 1946 . Revision of the Araneae of New Zealand. Part II . Records of the Auckland Institute and Museum . 3 . 85-97.
4. Marples . R.R. . 1959 . The dictynid spiders of New Zealand . Transactions and Proceedings of the Royal Society of New Zealand . 87 . 333-361.
5. Lehtinen . P.T. . 1967 . Classification of the cribellate spiders and some allied families, with notes on the evolution of the suborder Araneomorpha . Annales Zoologici Fennici . 4 . 199-468.
6. 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 . New Zealand Threat Classification Series . English . 34 . 1–37.