Editing Cephalothorax (section)

==Arachnid anatomy==

===Fovea===
The fovea is the centre of the cephalothorax and is located behind the head (only in spiders).<ref name = dalton2008>Dalton, Steve (2008). ''Spiders; The Ultimate Predators''. A & C Black, London. P.p. 19. {{ISBN|9781408106976}}.</ref> It is often important in identification. It can be transverse or procurved <ref name = smith1990>Smith, A. M. (1990c). Baboon spiders: Tarantulas of Africa and the Middle East. Fitzgerald Publishing, London, pp. 138. Retrieved February 13, 2016.</ref> and can, in some [[tarantulas]] (e.g. ''[[Ceratogyrus darlingi]]'') have a "horn".<ref name = gallon2008>{{cite journal |last1=Gallon |first1=R.C. |date=2008 |title=On some poorly known African Harpactirinae, with notes on ''Avicuscodra arabica'' Strand, 1908 and ''Scodra pachypoda ''Strand, 1908 (Araneae, Theraphosidae) |journal=Bulletin of the British Arachnological Society |volume=14 |page=238 }}</ref>

===Clypeus===
{{Main|Clypeus (arthropod anatomy)}}

The clypeus is the space between the anterior of the cephalothorax and the ocularium. It is found in most arachnids.<ref name = smith1990/> It is connected to the labrum of the invertebrate, between the labrum and the face.

===Ocularium===   
The ocularium is a "turret" for the [[ocellus|ocelli]] found in most arachnids.<ref name = ynu>[http://www.ynu.org.uk/insects/spiders Spiders...] {{Webarchive|url=https://web.archive.org/web/20211128061345/https://www.ynu.org.uk/insects/spiders |date=2021-11-28 }} [[Yorkshire Naturalists' Union]]. Retrieved February 13, 2016.</ref> In [[harvestman|harvestmen]], it may have the ornament of spines.<ref name = sankeysavory1974>Sankey, John & Savory, Theodore. ''British Harvestmen''. Academic Press. P.p. 1–75. {{ISBN|012619050X}}.</ref>

===Trident===
The trident is a small group of (usually three) spines found in harvestmen exclusively. It is located in front of the ocularium. It varies in size amongst species; in some it is completely absent, and in others it is enlarged considerably.<ref name = sankeysavory1974/>