Tulepyge, Adrain & Westrop, 2006

Adrain, Jonathan M. & Westrop, Stephen R., 2006, New genus of dimeropygid trilobites from the earliest Ordovician of Laurentia, Acta Palaeontologica Polonica 51 (3), pp. 541-550 : 544

Genus Tulepyge nov.

Type species: Tulepyge tulensis nov., from the House Formation of western Utah, USA .

Other species: Hystricurus paucituberculatus Fortey, 1983 , from the Green Point Formation of western Newfoundland, Canada.

Etymology: Tule, after the Tule Valley, western Utah, and the Greek noun πυγε, rump; gender is feminine.

Diagnosis.—Exoskeleton vaulted; anterior border furrow shallowed medially; librigenal field with prominent exsagittal row of large tubercles; eye socle of single band; genal spine short and thorn−like; pygidium with five axial rings, prominent large tubercle pair on first four, pleural furrows sharply declined at fulcrum but running without interruption to strong border; adaxial margin of border with scalloped shape due to contact with inflated distal part of posterior pleural bands.

Discussion.—See family discussion above.