Morphology
* Convex Cephalon * Trapezoidal glabellae, frequently distinctly furrowed and surelevated compared to the axis. * Dorsal furrows slightly convergent forwardly with almost linear anterior parts. : Broad dorsal furrows, deep and not well defined. : 3, rather 4, well defined lateral furrows * Librigenæ without lateral area or lateral furrow. * Preglabellar field very short, downward oriented. * Inflated occipital ring with smooth lateral ends. * Occipital furrow broad and deep. * Eye ridges rather weak. * Anterior cephalic notch marked, with frequently parallel edges. * Thorax : Strongly convex axis. * Triangular Pygidium * Convex axis, with segmentation well defined. * 6 - 8 axial rings. * Pleurae with deep border furrows. * Axis extending nearly to posterior margin (large posterior terminal piece), connected to : it by short postaxial ridge. * Pleural fields behind articulating half-ribs nearly smooth, with 2 - 3 very indistinct ribs. : Wide border distinctly set off by marked change in convexity.References
Calymenidae Phacopida genera Ordovician trilobites Silurian trilobites Fossils of the Czech Republic Letná Formation Fossils of France Fezouata Formation fossils {{phacopida-stub