Calymenina

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Flexicalymene ouzregui from Erfoud, Morocco ( Length: 7 cm)

The Calymenina form a suborder of the trilobite order Phacopida.

Features

The cephalon is semicircular to subtriangular with gonatoparen sutures and usually has small, holochroal compound eyes. Below is a rostral plate is available. The glabella has four to five lateral praise and is narrowed to the front. The thorax typically has thirteen segments with rounded Pleurenenden; sometimes there are also eleven or twelve segments. The pygidium is semicircular to triangular without spines at the edges.

Families

• Calymenoidea
• Bavarillidae
• Calymenidae
• Homalonotidae
• Pharostomatidae