Asaphiscus

A. wheeleri occurs in the Middle Cambrian of the United States (Delamaran, Lower Wheeler Shale, Millard County, Utah, 40.0°N, 113.0°W; and Menevian, Wheeler Formation, House Range, Utah, 39.2° N, 113.3° W). == Description ==

Asaphiscus are average size trilobites of (up to ) with a rather flat calcified dorsal exoskeleton of inverted egg-shaped outline, about × longer than wide, with the widest point near the back of the headshield (or cephalon). The cephalon is about 40% of the body length, is semi-circular in shape, has wide rounded genal angles, and a well defined border of about × the length of the cephalon. The central raised area of the cephalon (or glabella) is conical in outline with a wide rounded front and is separated from the border by a preglabellar field of about × the length of the cephalon, and has 3 sets of furrows that may be clear or inconspicuous. The articulated middle part of the body (or thorax) has 7-11 segments (9 in A. wheeleri), with rounded tips. The tailshield (or pygidium) is about 30% of the body length, is semi-circular in shape, with a wide flat border, and an entire margin. == Reassigned species ==

Some species originally described as belonging to Asaphiscus have later been reassigned to other genera. • A. capella = Glyphaspis capella • A. granulatus = Genevievella granulata • A. gregarius = Blainia gregarius • A. minor = Cedaria minor • A. unispinus = Weeksina unispina == Sources ==