Asaphiscus
Asaphiscus is a genus of trilobite that lived in the Cambrian. Its remains have been found in Australia and North America, especially in Utah.
Distribution
A. wheeleri occurs in the Middle Cambrian of the United States.
Description
Asaphiscus are average size trilobites of 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. 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 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 has 7-11 segments, with rounded tips. The tailshield 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 capellaA. granulatus = Genevievella granulata A. gregarius = Blainia gregariusA. minor = Cedaria minorA. unispinus = ''Weeksina unispina''