Thomisidae  Sundevall, 1833 / Xysticus  C. L. Koch, 1835   105 species

Xysticus robustus  (Hahn, 1832)


Male palp black-brown, knob-shaped, sclerotised structure originating centrally on bulbus. Tibial apophysis tripartite, one ventral, that is slender and apically bent hook-like, one intermediate, that is broad and massive in ventral view and slightly tapering toward the tip, retrolateral apophysis with distinct tip. Epigyne striking, dark and strongly sclerotised, embedded in bulges and folds. Vulva with narrow, bent entrance duct. Prosoma unicoloured red-brown, with slightly brighter, median area (median longitudinal line in females), partly with white or cream-yellow spots on inner side of eye protrusion of anterior median eyes. Females with dark and/or bright spots. Sternum black-brown. Chelicerae spined frontally. Legs with velvety surface, black-brown with dark red to wine-red tinge, brighter on tibia, dorsally darker than on other sides. Legs partly with white longitudinal line or bright spots. Opisthosoma unicoloured black-brown to slightly reddish dark brown with small yellow and black spots, with 5 sigilla.

Body length male: 5-6.9 mm
Body length female: 7-12 mm
Additional information

Under stones and in stony debris, short grass and moss, deciduous forests and meadows, from lowland up to subalpine region

Frequency: Not frequent

  No data
Distribution comment: Record for Norway: Løvbrekke (2016) pers. comm.
Global distribution (WSC 2018): Europe to Central Asia
 male  female

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29-08-2016 Distribution update Old value
07-03-2016 Image insert
28-04-2014 Distribution update Old value