Family Amaurobiidae Thorell, 1869
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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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male Pedipalp, ventral view
(Marusik et al. 2010a)

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male Pedipalp, retrolateral view
(Marusik et al. 2010a)

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male Bulbus, terminal view
(Marusik et al. 2010a)
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male Chelicera, posterior view
(Marusik et al. 2010a)

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female Epigyne, ventral view
(Marusik et al. 2010a)

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female Vulva, dorsal view
(Marusik et al. 2010a)
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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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male Pedipalp, ventral view
(Lehtinen 1967)

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male Pedipalp, retrolateral view
(Lehtinen 1967)

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male Habitus, dorsal view
(Palmgren 1977)
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female Epigyne, ventral view
(Lehtinen 1967)

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female Vulva
(Lehtinen 1967)
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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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male Pedipalp
(Roberts 1995)

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male Tibial apophysis
(Roberts 1995)

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female Epigyne
(Roberts 1995)
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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
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male Palpal tibia, dorsal view
(Roberts 1995)

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male Tibial apophysis
(Roberts 1995)

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female Epigyne
(Roberts 1995)
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female Epigyne
(Roberts 1995)

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female Habitus
(Koh unpubl.)
Adapted from Marusik et al. (2012)

Further genera