Fig. 20 in Braincase Of The Upper Devonian Shark Cladodoides Wildungensis (Chondrichthyes, Elasmobranchii With Observations On The Braincase In Early Chondrichthyans

Fig. 20. Diagrammatic views of the postorbital process looking posteriorly, in Cladodoides (A) and Orthacanthus (B). Both panels are from Schaeffer (1981), whose original abbreviations are as follows; etha, ethmoid articulation (= orbital articulation in this work); fepsa, foramen for efferent pseudobranchial artery; foph, foramen for ophthalmic artery; fpal, foramen for branch of palatine nerve (= trigeminal mandibular ramus in this work); fso, foramen for superficial ophthalmic nerve; jc, jugular canal; tfr, trigemino­facialis recess (probably a recess in Orthacanthus, but not in Cladodoides; see text for details); II, optic foramen.