Olenoides paraptus

Order Corynexochida / Suborder Corynexochina / Family Dorypygidae

olen, Olenus, a trilobite genus name; -oides, Greek, resembling, like

par, Greek, near, beside; aptus, suitable

Cephalon semicircular; cranidium sub-trapezoidal; glabella subcylindrical, sides gently expanding forward, broadly rounded anteriorly, with three pairs of shallow lateral glabellar furrows; occipital furrow deeper laterally, with occipital tubercles; occipital ring narrow laterally, broad medially and arched backward; dorsal furrow deep, forming anterior pits at the anterolateral corners of the glabella; palpebral lobe small; eye ridge distinct; fixed cheek narrow; inner border absent; outer border narrow, ar Arched forward; Anterior branch of facial suture short, extending forward and outward; Posterior branch extending obliquely; Posterior border furrow broad; Free cheek broad, genal spines relatively long. Thorax of 7 segments; Thoracic axis broad; Middle of axial rings with small tubercles narrow laterally, broad medially and arched backward; dorsal furrow deep, forming anterior pits at the anterolateral corners of the glabella; palpebral lobe small; eye ridge distinct; fixed cheek narrow; inner border absent; outer border narrow, arched forward; anterior facial suture branches short, extending forward and outward; posterior branches oblique; posterior border furrow broad; free cheek broad, genal spine rather long. Thorax of 7 segments; axis broad, axial rings with small tubercle-spines; pleural furrows broad and deep; pleural ribs with spines at their outer ends, progressively lengthening. Pygidium semi-elliptical; axis elongate-conical, of 6 rings plus a slightly expanded terminal ring, rings with small tubercle-spines; with a postaxial ridge reaching the pygidial border; pleural furrows broad and deep; interpleural furrows distinct; border narrow; six pairs of pygidial spines, the sixth pair shorter, the other five pairs of equal length.