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Linyphiidae  Blackwall, 1859 / Centromerus  Dahl, 1886   71 species

Centromerus caecus Lecigne, 2023

Description
Female

Colour: prosoma, legs and sternum very pale yellow, chelicerae only slightly darker; opisthosoma uniformly pale grey.
Eyes: completely absent.
Chelicerae: three promarginal teeth, four retromarginal minute teeth
Legs: chaetotaxy 2221; one prolateral spine on femur I in the distal quarter; position of trichobothrium on metatarsus I 0.26

Epigyne: poorly chitinised. Wide genital fossa, anteriorly provided with a folded scape, it's distal part strongly narrowing. Lateral parts of the copulatory ducts visible in transparency.
Vulva: spermathecae inclined inwards, rounded anteriorly and posteriorly elongated. Copulatory ducts posteriorly inclined outwards by about 45° without extending anteriorly beyond the spermathecae.

Body length female: 1.12-1.32 mm mm
Additional information

Troglobiont species.

Character states from linyphiid key
Distribution
  Presence
  No data
Distribution comment: Only known from one cave in the western Rif.
Global distribution (WSC 2026): Morocco
Phenology
JanFebMarAprMayJunJulAugSepOctNovDec
 male  female
Figures
Distribution List
Morocco   (Lecigne et al., 2023; Benhalima & Bosmans, 2024) |||
References

Benhalima S, Bosmans R (2024) First historical checklist of spiders (Arachnida: Araneae) from Morocco, between 1840–2024. Zootaxa 5555: 407-535 pdf

Lecigne S, Moutaouakil S, Lips J (2023) Contribution to the knowledge of the spider fauna of Morocco (Arachnida: Araneae) – first note – on new records of cave spiders. Arachnologische Mitteilungen 66: 44-71 pdf

WSC (2026) World Spider Catalog. Version 27. Natural History Museum Bern, online at http://wsc.nmbe.ch (13.2.2026) doi: 10.24436/2 pdf

Updates
31-08-2025 Distribution update Detail
17-01-2024 Datasheet update Detail
15-01-2024 Image insert
10-01-2024 Distribution insert Detail