Cribellum absent

  1  

Cribellum present

  2  

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

Mizaga

6 eyes, no yellowish pattern

Scotolathys

8 eyes

  3  

Cribellum divided (bipartite)

  4  

Cribellum undivided (entire)

  5  

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

Legs with spines

  6  

Legs without spines

  7  

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

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)

  8  

Male palp without ctenidia, epigyne without ridges

  1  

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

  9  

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

  10  

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)

Retrotibial apophysis not long, epigyne different

  11  

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

  12  

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

  13  

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

  14  

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

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