Family Amaurobiidae Thorell, 1870

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1

Cribellum lacking, serrated keel on the inner margin of the cheliceral groove, prolateral position of the tegular apophysis, complex embolus bent 3 times, solid epigynal plate with copulatory openings in the epigastral fold, only in the Russian Caucasus part

Ovtchinnikovia

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Cribellum present, other characters different

  2  

2
(1)

Anterior median eyes equidistant from each other and anterior lateral eyes; opisthosoma  with dark median band, male palpal tibia without dorsal apophysis, epigyne with strongly sclerotized median part of median plate. Northern Scandinavia and Siberia

Arctobius

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Anterior median eyes closer to each other than to lateral eyes; median band on opisthosoma not developed or visible only in anterior half; male palpal tibia with distinct dorsal apophysis, epigyne bilobate, or with weakly sclerotized median plate

  3  

3
(2)

Dorsal tibial apophysis not subdivided, retrolateral tibial apophysis elongate dorsally, patellar apophysis lacking; epigyne divided by a longitudinal slit

Callobius

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Retrolateral tibial apophysis large; tegular apophysis located near the base of median apophysis. Epigyne with transverse lobe or fovea, not clearly separated into two parts

Amaurobius

Adapted from Marusik et al. (2012)