Conularida

(paleontology) A small group of extinct invertebrates showing a narrow, four-sided, pyramidal-shaped test.

A small group of extinct invertebrates showing a fourfold symmetry and a narrow pyramidal shape; the cross section commonly is square. Specimens are chitinous and frequently impregnated with calcium phosphate. The four side walls are characteristically ornamented by numerous transverse lines. The posterior tip may bear an attachment disk or may be broken off and sealed with a septum. Internal structures are rare; the few known show fourfold symmetry. Conularida are regarded as a subclass of the Coelenterata because of the characteristic symmetry. See also Coelenterata.

Specimens are worldwide in occurrence and are known from rocks of Cambrian through Triassic age. They have been found in sandstone, shales, and limestones. About 20 genera and 150 species are known. Except for a few local occurrences, Conularida are rare fossils.