Bathynotus holopygus

Order Redlichiida / Suborder Redlichiina / Superfamily Redlichioidea / Family Bathynotidae

bathy-, Greek, deep, high; not-, Greek, back

holo-, Greek, whole; pyg-, Greek, tail

Peltura(Olenus)holopyga; Bathynotus holopyga; B. sinensis

Dorsal shield elongate-oval. Cranidium sub-trapezoidal, gently convex; glabella broadly conical, rounded anteriorly, with two pairs of transverse glabellar furrows slightly arched backward; inner border absent or extremely narrow; occipital furrow clearly defined occipital ring of uniform width, bearing small tubercles; palpebral lobe slender and ridge-like, palpebral furrow broad and deep; fixed and free cheeks of equal width, both rather narrow; free cheek with a huge, long genal spine directed backward and Protruding below; Hypostome distinctive, nearly pentagonal. Thorax with thirteen segments; Axis twice as wide as the pleural region, with small tubercles; Pleural region narrow, 11th segment with longest pleural spine, 12th-13th segments with pleural spines not developed. Pygidium micropygous, elongate-oval and transversely broad; axis relatively broad, usually with one narrow axial ring and a large terminal piece; border broad and flat.

This species is the type species of Bathynotus.