Aneplasa nigra

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Dark Aneplasa Flat-Bellied Ground Spider
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Animalia
Phylum: Arthropoda
Subphylum: Chelicerata
Class: Arachnida
Order: Araneae
Infraorder: Araneomorphae
Family: Gnaphosidae
Genus: Aneplasa
Species:
A. nigra
Binomial name
Aneplasa nigra
Tucker, 1923 [1]

Aneplasa nigra is a species of spider in the family Gnaphosidae. [2] It is endemic to South Africa and is commonly known as the dark Aneplasa flat-bellied ground spider.

Contents

Distribution

Aneplasa nigra is distributed across two South African provinces: Western Cape and Northern Cape. It has been recorded from the Matroosberg mountains near Ceres, Prieska area, Tswalu Kalahari Reserve, and Benfontein Nature Reserve. [3]

Habitat and ecology

The species is a ground dweller known from Fynbos, Savanna, and Nama Karoo biomes at altitudes ranging from 950 to 1,155 m above sea level. It has also been sampled in pistachio orchards. [3]

Description

The carapace is very dark brown, rimmed and strongly mottled with black. The legs are a little paler becoming paler distally, with tarsi reddish in colour. The abdomen is black, and the sternum is dark infuscated brown. Total length is 4.4 mm. [3]

Conservation

Aneplasa nigra is listed as Least Concern by the South African National Biodiversity Institute. Despite males not being known, samples of females show that this species is widespread. The species is protected in the Tswalu Kalahari Reserve and Benfontein Nature Reserve. [3]

Taxonomy

The species was originally described by R.W.E. Tucker in 1923 from the Matroosberg mountains near Ceres in the Western Cape. It has not been revised since the original description and is known only from females. [3]

References

  1. Tucker, R. W. E. (1923). "The Drassidae of South Africa". Annals of the South African Museum. 19 (2): 251–437.
  2. "Aneplasa nigra Tucker, 1923". World Spider Catalog. doi:10.24436/2 . Retrieved 24 September 2025.
  3. 1 2 3 4 5 Dippenaar-Schoeman, A.S.; Haddad, C.R.; Foord, S.H.; Lotz, L.N. (2021). The Gnaphosidae of South Africa. part 1 (A-D). South African National Survey of Arachnida Photo Identification Guide. p. 13. doi:10.5281/zenodo.7197174. Creative Commons by small.svg  This article incorporates text available under the CC BY 4.0 license.