Lo-580 LAMP SHELL, Glottidea pyramidata, a lingulid brachiopod closely related to
the genus Lingula of the Indo-Pacific. Although Glottidea has no fossil record, lingulids have remained virtually unchanged since the Ordovician period. They survive well in a small dish of sand maintained at 60 F, and their rapid burrowing may be observed when they are touched. They are excellent for demonstrating the role of the lophophore in feeding. Available year round. Size: small to medium, 2.5-4 cm.