µCT scan of the turbinal skeleton in an adult Lemur catta (CMZ 930402). A Virtual 3D reconstruction showing the turbinals in medial view in situ within the transparent left nasal fossa. Among primates, L. catta retained several patterns of the placental template: ethmoturbinal (ET) I forms an anterior (LA) and a posterior lamina (LP), ET III expands far caudally into the ethmoidal recess, and the pars lateralis houses three frontoturbinals (FTs). B–E µCT cross sections of the ethmoidal region (rostral to caudal) in rostral view. The turbinals and the semicircular crest (LS) are highlighted. They are well-developed, though their shape remains single scrolled in cross-section. Abbreviations: CC, cavum cranii; LC, lamina cribrosa; LH, lamina horizontalis; LT, lamina terminalis; M1–3, upper 1st to 3rd molar; MT, maxilloturbinal; SM, sinus maxillaris; SN, septum nasi. Scale bars: 5 mm.