FIG. 9 in Transverse Canal Foramen And Pericarotid Venous Network In Metatheria And Other Mammals

FIG. 9. Caluromys sp. ZIUT PND 77 (Didelphidae, Didelphimorphia), postnatal specimen, stained coronal sections in rostrocaudal order. A–C, sections through rostral portion of transverse basisphenoid sinus (ss. 71.02.02, 78.03.02, 79.03.02); D–F, sections through rostral end of tympanic cavity and carotid canal, showing rapid diminution of internal carotid vein (ss. 76.03.03, 77.02.03, 77.03.01). There is no evidence of trunk of transverse canal vein or its branches in expected positions. Internal carotid artery and vein still fill endocranial carotid grooves, even though shrinkage occurred during histological processing. Asterisk, branches of pharyngeal and pterygoid plexuses. Key: AC, auditory capsule; ahp, adenohypophysis; AS, alisphenoid; at, auditory tube; bbs, basisphenoid-basioccipital synchondrosis; BS, basisphenoid; bvp, basicranial venous plexus; cs, cavernous sinus; ctn, chorda tympani nerve; EC, ectotympanic; ejv, external jugular vein; encg, endocranial carotid groove; GO, goniale; ica, internal carotid artery; icn, internal carotid nerve; icv, internal carotid vein; MD, mandible; mdn, mandibular nerve; mxn, maxillary nerve; mxv, maxillary vein; oa, ophthalmic artery; on, ophthalmic nerve; ov, ophthalmic vein; pal, processus alaris; pglv, postglenoid vein; pvp, pterygoid venous plexus; spm, stylopharyngeus muscle; tg, trigeminal ganglion; tmc, tympanic cavity; tmm, tympanic membrane; ttm, tensor tympani muscle; vps, ventral petrosal sinus.