Objectives Cranial venous sinuses are elements formed by dura mater, they are fixed in bony parts leaving their tracks as grooves, which can be used as recognition in morphological studies. One of these grooves, the sphenoparietal sinus groove, is not referenced in Terminologia Anatomica , so the objective is to demonstrate the existence in human skulls. Methods Sixty five human adult skulls were selected, without distinction of ethnic group or sex, in order to evaluate the existence of a bony groove for the sphenoparietal sinus. As inclusion criteria, the skulls had to have integral the anterior region of the middle cranial fossa. To establish the existence of the groove, under the lesser wing of the sphenoid was visualized and palpated endocranially. Results Of the 65 skulls, 63 had a bony groove related to the sphenoparietal sinus (96,92%); of these, 50 presented bilaterally (76,92%) and 13 unilaterally: 9 in the left region (13,84%) and 4 in the right (6,15%); two skull did not present the groove (3.08%). Conclusion In Terminologia Anatomica , the groove for the sphenoparietal sinus is not described, a constant structure due to its high percentage of presence (96,92%), for which the term “groove for the sphenoparietal sinus” is proposed, which can serve as a landmark in cranial morphology. This abstract is from the Experimental Biology 2019 Meeting. There is no full text article associated with this abstract published in The FASEB Journal .