| 1a | Eight eyes present (sometimes small eyes are very difficult to see) |
  | ||
| 1b | Six eyes present |   | ||
| 2a | Cribellum (a small plate just in front of spinnerets) absent |  | ||
| 2b | Cribellum (a small plate just in front of spinnerets) present | |||
| 3a | Chelicerae directed downward or downward and forward, cheliceral fangs directed towards each other |  | ||
| 3b | Chelicerae projecting forward, cheliceral fangs
directed more or less parallel to the main body axis
Family : Atypidae |
 | ||
| 4a | Tarsi with three claws |  | ||
| 4b | Tarsi with two claws |  | ||
| 5a | Spiders with extremely long and
thin legs, leg II 4-5 times longer than body
Family : Pholcidae |
| ||
| 5b | Spiders without extremely long and thin legs | |||
| 6a | Tibia and metatarsus I & II
with a row of long prolateral spines
Family : Mimetidae |
 | ||
| 6b | Tibia and metatarsus I & II without a row of long prolateral spines | |||
| 7a | Tarsi IV with 6 or 10 serrated
setae, forming a comb
Family : Theridiidae |
 | ||
| 7b | Tarsi IV without such a comb | |||
| 8a | Eye group in hexagonal arrangement
Family Oxyopidae |
 | ||
| 8b | Eye group not in hexagonal arrangement | |||
| 9a | Tarsi with numerous trichobothria (extrimly thin sensory setae) |  | ||
| 9b | Tarsi without trichobothria | |||
| 10a | Tarsal trichobothria in a single dorsal row |  | ||
| 10b | Tarsal trichobothria irregular, in two dorsal rows |
| ||
| 11a | The six spinnerets in a
more or less transverse row
Family : Hahniidae |
 | ||
| 11b | The six spinnerets in three rows
Family:Agelenidae |
  | ||
| 12a | Posterior row of eyes so strongly
recurved that it may be considered to form two rows
Family : Lycosidae |
  | ||
| 12b |
Posterior row of eyes slightly recurved and not forming two distinct rows Family : Pisauridae |
| ||
| 13a | Chelicerae divergent from base,
usually long and strong
Family : Tetragnathidae |
 | ||
| 13b | Chelicerae not divergent from base | |||
| 14a | Femur I distinctly thicker than
femur IV (~ 3 times), small spiders with spherical abdomen
Family : Theridiosomatidae |
 | ||
| 14b | Femur I & IV almost the same thickness | |||
| 15a | Tibia IV with 1 or 2 dorsal
spines
Family : Linyphiidae |
 | ||
| 15b | Tibia IV usually with numerous spines and/or setae | |||
| 16a | Spinnerets situated anteriorly
almost in the center of ventral surface of abdomen.
Family Araneidae |
 | ||
| 16b | Spinnerets situated at the end of abdomen
Family : Araneidae |
|||
| 17a | Tracheal spiracle in middle of
ventral surface of abdomen, or closer to the epigastric furrow
Family : Anyphaenidae |
 | ||
| 17b | Tracheal spiracle just in front of the spinnerets |  | ||
| 18a | Eyes arranged in three rows, the
front or anterior median eyes very large
Family : Salticidae |
 
| ||
| 18b | Eyes arranged in two rows, the front or anterior median eyes not especially large | |||
| 19a | Colulus present. Legs I & II
much longer than III & IV, spiders crab-shaped.
Family : Thomisidae |
  | ||
| 19b | Colulus absent | |||
| 20a | Tarsi I & II with
scopulae (thick dense setae)
Family Philodromidae |
 | ||
| 20b | Tarsi I & II without scopulae | |||
| 21a | Anterior spinnerets cylindrical,
widely separated at base
Family Gnaphosidae |
 | ||
| 21b | Anterior spinnerets conical, separated by a distance much closer than their diameter | |||
| 22a | Clypeus less than the diameter of
an anterior median eye (AME), if it is about so (Fig) - posterior median
eyes (PME) separated about their diameter
Family Clubionidae |
 Clypeus - distance between edge of carapace and anterior row of eyes. | ||
| 22b | Clypeus not less than the diameter of an anterior median eye (AME), usually at least 2-3 times as wide |  | ||
| 23a | Anterior lateral eyes (ALE) not
larger than AME
Family : Corinnidae |
|||
| 23b |
Anterior lateral eyes (ALE) larger than AME Family : Liocranidae |
 | ||
| 24a | All eyes homogenous, light in
color, tarsi with a dorsal row of trichobothria
Family : Amaurobiidae |
 | ||
| 24b | Eyes homogenous, dark in color, or heterogeneous light and dark in color; tarsi without trichobothria | |||
| 25a | Eyes homogenous, dark; metatarsus
IV compressed and concave above
Family : Uloboridae |
 | ||
| 25b | Eyes heterogeneous; metatarsus IV normal shape
(not compressed and concave above)
Family : Dictynidae |
 | ||
| 26a |
Spiders with extremely long and thin legs, II leg 4-5 times longer than body Family : Pholcidae |
 | ||
| 26b | Spiders without extremely long and thin legs | |||
| 27a |
Chelicerae large directed downward and forward, carapace and legs deep red Family : Dysderidae |
| ||
| 27b |
Chelicerae projecting downward, carapace and legs not red |
| ||
| 28a | Carapace strongly arched behind,
body dappled
Family : Scytodidae |
 | ||
| 28b | Carapace not arched behind, body not dappled
Family : Segestriidae |
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|
Common Spiders of Borneo |