Family Dictynidae O. P.-Cambridge, 1871

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1

Cribellum absent

  2  

-

Cribellum present

  6  

2
(1)

Six eyes

  3  

-

Eight eyes

  4  

3
(2)

Retrotibial apophysis as long as tibia, tip of conductor coiled, insemination duct short and wide

                                Cicurina japonica


-

Retrotibial apophysis small, invisible, insemination ducts long and thin

Chorizomma

4
(2)

Conductor very long upper arm, longer than cymbium, retrotibial apophysis sharply pointed, epigyne with coiled insemination ducts, no distinct fovea and no septum

Mastigusa

-

Upper arm of conductor undeveloped, epigyne with fovea or septum

  5  

5
(4)

Retrotibial apophysis present, wide and not tapering epigynal fovea distinct (Cicurina paphlagoniae is obviously misplaced in this genus)

Cicurina

-

Retrotibial apophysis absent, tip of conductor straight, embolus short, epigyne with septum (intertidal species)

Mizaga

6
(1)

6 eyes, no yellowish pattern

Scotolathys

-

8 eyes

  7  

7
(6)

Cribellum divided (bipartite)

  8  

-

Cribellum undivided (entire)

  9  

8
(7)

Dark coloured, almost black, no white (guanine) pigmentation, palp with ctenidia (=small process on tibia, bearing very small spines), epigyne with ridges

Dictyna
(partim)

-

Bright green or red with white (guanine) pigmentation, male palp with small patellar apophysis

Nigma

9
(7)

Legs with spines

  10  

-

Legs without spines

  11  

10
(9)

Minute (< 2 mm), spines either strong and large or small, cymbium unmodified, receptacles bean-shaped to oval

Altella

-

Medium sized (> 2mm), spines normal on all legs, cymbium with basal fold, epigyne with septum, receptacles round

Devade

11
(9)

Male palp with ctenidia (=small process on tibia, bearing very small spines), epigyne with ridges (cave: no ctenidia in Archaeodictyna ammophila which shall key out here)

  12  

-

Male palp without ctenidia, epigyne without ridges

  15  

12
(11)

Cephalic part of the prosoma strongly raised in males, epigyne shows anterior to the epigastric furrow two dark receptacula, close to each other

Archaeodictyna

-

Cephalic part of the prosoma not strongly raised in males, epigynal ridges present

  13  

13
(12)

Male chelicera with lateral boss, embolic base in centre of tegulum, makes more than 360° loop, opisthosoma dark with light transverse spot in caudal half

Marilynia

-

Male without lateral boss, embolic base on prolateral-basal side or central-basal, opisthosoma with dark pattern on light background

  14  

14
(13)

Embolus thick, not long (starts from 8-9 o’clock)

Emblyna

-

Embolus thin, from not long to long (starts from 6 to 9)

Dictyna
(partim)

15
(11)

Retrotibial apophysis long, almost as long as cymbium, epigyne as figure

Brommella

-

Retrotibial apophysis not long, epigyne different

  16  

16
(15)

Male palpal patella with conical outgrowth or apophysis, receptacles round, epigyne with one shallow fovea or 2 distinct fovea, insemination duct long or very long, often with white (guanine) spots on opisthosoma

Lathys
(partim)

-

Male palpal patella without outgrowth or conical apophysis, opisthosoma without white spots, epigyne variable

  17  

17
(16)

Basal arm of conductor stretching dorsally, screw like or spine like, epigyne with one or two fovea, insemination duct long or very long, receptacles round

Lathys
(partim)

-

Different

  18  

18
(17)

Tip of conductor long and coiled, epigyne weakly sclerotized as figure (only northern Fennoscandia and Caucasus)

Arctella

-

Tip of conductor not long and not coiled, epigyne different

  19  

19
(18)

Tip of conductor stretching posteriorly, retrotibial apophysis not wider than tibia, epigyne weakly sclerotized

Argenna

-

Tip of conductor bent, retrotibial apophysis wider than tibia, fovea strongly chitinised (only northern Fennoscandia)

Hackmania

20
(1)

There is only one species in this enigmatic genus. It has been described as a new species 1884 by Simon, collected between grass bunches at the Spanish sea shore, but was obviously never recollected. The description contains no figures.

Chaerea

This key is a kind contribution of Yuri M. Marusik.

Further genera