Liocranidae  Simon, 1897 / Apostenus  Westring, 1851   6 species

Apostenus crespoi  Lissner, 2017


Male unknown.


When alive this is a bright reddish-orange species with distinct chevrons on opisthosoma and with indistinct leg annulations. Colours of prosoma and legs fade to yellow-brown in alcohol except for the dark-brown fovea, the very faint brown reticulations and the annulations of the legs becoming indiscernible.

Prosoma smooth with a narrow, protruding head. Eyes in a compact group and of normal size. PME separatedby a little more than half a diameter, the sockets of the remaining eyes touching. Eyes of PER equal in size, larger than the AME but smaller than ALE. Labium shaped like a triangle with rounded corners, more than 1.5 times wider than long, slightly less than half the length of the endites. Cheliceral promargin with three minute, discrete teeth, retromargin with two small discrete teeth. Sternum scutiform, projecting between coxae IV. Opisthosoma elongate oval, with four chevrons, densely covered with hairs which seem to fall off in alcohol. Femur I and II with two macrosetae in dorsal midline, III and IV with three. Femur I with additional strong prolateral macrosetae and two ventral macrosetae one of which is strong and light brown, second is thinner and black. Femur III and IV also with an additional prolateral macroseta in distal position and two ventral-prolateral macrosetae, also in distal positions. Patella I and II without macrosetae, III and IV each with a dorsal macroseta in distal position. Tibia I and II with five pairs of ventral macrosetae, Mt I and II with three pairs. Epigyne without a septum or median plate. The only external sclerotizations are the rather weakly sclerotized linings of the small copulatory openings which are circular-semicircular, and set apart anteriorly. The two halves of the vulva form a ‘V’ and are only bridged posteriorly by a thin bar.

Body length female: 3.2 mm
Additional information

Under stones on limestone grassland with bush encroachment.

The species most closely resembles Apostenus humilis Simon, 1932 and A. maroccanus Bosmans, 1999 based on build of the epigyne/vulva.

Frequency: Very rarely found

  No data
Distribution comment: Only known from type locality: Portugal, Setúbal, Arrábida near Azeitão
Global distribution (WSC 2021): Portugal
Distribution List
Portugal   (Branco et al., 2019) |||

Branco V V, Morano E, Cardoso P (2019) An update to the Iberian spider checklist (Araneae). Zootaxa 4614: 201-254 pdf

Lissner J (2017a) New records of spiders (Araneae) from Portugal. Arachnologische Mitteilungen 54: 52-58 pdf

WSC (2021) World Spider Catalog. Version 22.5. Natural History Museum Bern, online at (22.09.2021) doi: 10.24436/2 pdf

02-01-2019 Datasheet update Detail
02-10-2017 Image insert
02-10-2017 Distribution update Detail