Family Oonopidae Simon, 1890
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1

Two eyes

Diblemma
-

Six eyes

  2  
2
(1)		 Opisthosoma dorsally and ventrally without scutum

  3  
-

Opisthosoma dorsally and ventrally with scutum, sometimes also divided

  8  
speciesimage

female Opisthosoma, lateral view
(Bristowe 1948)
3
(2)

Femora IV noticeably broadened; ocular area as fig.

Orchestina
speciesimage

Eyes, dorsal view
(Pekár & Gajdoš 2001)
-

Femora IV not suspiciously enlarged

  4  
4
(3)

Leg I with ventral spines

  5  
-

Leg I without ventral spines

  6  
5
(4)		 Tibia of leg I with 4-5 ventral spines; prosoma reddish

Oonops
speciesimage

Leg I
(Roberts 1995)
-

Leg I with 6 pairs of ventral spines

Spinestis
6
(4)

Tibia and metatarsus I and II with long hairs

Oonopinus
-

Different

  7  
7
(6)

Prosoma roundish, body length 1.8 – 2.4 mm

Tapinesthis
-

Prosoma longitudinal, body length 1.0 – 1.3 mm

Cortestina
8
(2)

Scutum covers dorsal and ventral part of the opisthosoma completely

Silhouettella
speciesimage

Opisthosoma, lateral view
(Heimer & Nentwig 1991)
- Different

  9  
9
(8)		 Dorsal scutum is much larger than ventral scutum

Triaeris
speciesimage

Opisthosoma, lateral view
(Bristowe 1948)
-

Dorsal scutum more or less as large as ventral

  10  
10
(9)

Legs I and II with strong ventral spines

Ischnothyreus
speciesimage

female Opisthosoma, lateral view
(Bristowe 1948)
-

Legs without spines

Opopaea

Further genera