Which papillae form a V-shaped row near the junction of the anterior two-thirds and posterior one-third of the tongue (at the sulcus terminalis), and are also known by the alternate term 'papillae caliciformes'?

Circumvallate papillae — also called 'papillae caliciformes' in some terminology — are the largest tongue papillae, arranged in a V-shaped row along the sulcus terminalis, each surrounded by a circular trench and associated with von Ebner's glands (which secrete lipase and help cleanse the trench for taste perception).