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Theridiidae  Sundevall, 1833 / Robertus  O. Pickard-Cambridge, 1879   18 species

Robertus lyrifer  Holm, 1939

WSC LSID urn:lsid:nmbe.ch:spidersp:007979

Key to genera | Key to species

Description
Male

Palp: with angled tibia. Prosoma 1.2 mm long. Colouration as in female, but lighter.

Body length male: 2.5-2.7 mm
Female

Epigyne with a strongly sclerotized horseshoe-shaped structure. Palp: claw with 2 teeth. Prosoma brown, with some darker radiating striae. Prosoma 1.3-1.6 mm long. Sternum greyish brown, darker on edges. Eyes: AME one diameter apart, and 1.5 diameters from ALE, PME 1.5 diameters apart, and 2 diameters from PLE, AME one diameter from PME. Legs reddish brown. Opisthosoma greyish black.

Body length female: 3-3.9 mm
Additional information

In moss and in bush layer of open birch forests.

Distribution
  Presence
  No data
Global distribution (WSC 2024): Iceland, Scandinavia, Austria, Russia (Europe to Far East), Canada
Phenology
JanFebMarAprMayJunJulAugSepOctNovDec
 male  female
Figures
species

male Pedipalp
(Hauge 1969)

species

male Pedipalp
(Holm 1945)

species

male Pedipalp
(Agnarsson 1996)

species

male Pedipalp, retrolateral view
(Wunderlich 1976)

species

male Pedipalp, ventral view
(Løvbrekke unpubl.)

species

male Pedipalp, retrolateral view
(Løvbrekke unpubl.)

species

male Part of embolus
(Holm 1945)

species

female Palpal claw
(Wunderlich 1976)

species

female Epigyne
(Hauge 1969)

species

female Epigyne
(Agnarsson 1996)

species

female Epigyne, ventral view
(Wunderlich 1976)

species

female Epigyne, ventral view
(Løvbrekke unpubl.)

species

female Epigyne
(Morka unpubl.)

species

female Vulva
(Hauge 1969)

species

female Vulva, dorsal view
(Løvbrekke unpubl.)

Distribution List

"No references" does not mean that the species does not occur in this country, but that we have not yet inserted the reference for it. We are working on it.

Austria   (no references) ||| Estonia   (no references) ||| Finland   (Koponen et al., 2016) ||| Iceland   (Agnarsson, 1996) ||| Lithuania   (no references) ||| Norway   (Aakra & Hauge, 2003) ||| Russia, Eastern   (no references) ||| Russia, Northern   (no references) ||| Russia, Western   (no references) ||| Sweden   (Kronestedt, 2001) |||
References

Aakra K, Hauge E (2003) Checklist of Norwegian spiders (Arachnida: Araneae), including Svalbard and Jan Mayen. Norwegian Journal of Entomology 50: 109-129 pdf

Agnarsson I (1996) Íslenskar köngulær Fjölrit Náttúrufræðistofnunar 31: 1-175 pdf

Hauge E (1969) Six species of spiders (Araneae) new to Norway. Norsk Entomologisk Tidsskrift 16: 1-8 pdf

Holm Å (1945) Zur Kenntnis der Spinnenfauna des Torneträskgebietes. Arkiv för Zoologi 36(A15): 1-80 pdf

Koponen S, Fritzén N R, Pajunen T (2016) Checklist of spiders in Finland (Araneae). 6th version, December 2016, online at http://biolcoll.utu.fi/arach/checklist_of_spiders_in_Finland.htm pdf

Kronestedt T (2001) Checklist of Spiders (Araneae) in Sweden [Preliminary version February 2001] pdf

Le Peru B (2011) The spiders of Europe, a synthesis of data: Volume 1 Atypidae to Theridiidae. Mémoires de la Société Linnéenne de Lyon 2: 1-522 pdf

Løvbrekke H (unpubl.)

Morka G H (unpubl.)

WSC (2024) World Spider Catalog. Version 25.0. Natural History Museum Bern, online at http://wsc.nmbe.ch (22.01.2024) doi: 10.24436/2 pdf

Wunderlich J (1976) Zur Kenntnis der mitteleuropäischen Arten der Gattung Enoplognatha Pavesi und Robertus O. Pick. Cambridge Senckenbergiana Biologica 57: 97-112 pdf

Updates
02-11-2022 Gallery image insert
27-09-2022 Image insert
26-09-2022 Gallery image insert
11-08-2015 Image insert
24-06-2014 Image insert