일반명 : 삼엽충(Trilobite)
학 명 : Asaphiscus wheeleri
지질시대 : 고생대중기캄브리아기약 5억25백만년전(Middle Cambrian 525 million years old)
지 층 : 휠러층(Wheeler Formation)
원산지 : 미국 유타(Millard County, Utah, U.S.A.)
Size: Trilobite is 45mm long
CLASS ; Trilobita
ORDER ; Ptychopariida
FAMILY ; Asaphiscidae
GENUS/SPECIES - Asaphiscus wheeleri
Here is a fine example of Asaphiscus wheeleri from the Cambrian of Utah. This large trilobite is complete and very well articulated. The bug exhibits very fine detail - both free cheeks are present and tightly attached, which is quite unusual. This black trilobite has beautiful, thick exoskeleton that contrasts strikingly with the dark grey matrix. The bug also has a few bitten pleurons, as can be seen in the close-up photo. This is a very nice Asaphiscus wheeleri with free cheeks intact