Lonchocephalus plenaTrilobites Order Ptychopariida, Family Ptychopariidae Geological Time: Upper Middle Cambrian Size (25.4mm=1 inch): Trilobite is 4 mm on a 9 x 11 cm plate Fossil Site: Weeks Formation, House Range, Millard County Fossil Code: PFT413 Fossil Price: $300.00
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Description:
Presented is a specimen of an elusive and very, very rare trilobite
species. Representative physical traits include an occipital
spine and three axial spines. The species is quite small, with
a mature adult reaching an optimum length of about 8 mm. This
one is complete, with the axial spines intact. The right genal
spine is compressed against the side of the cephalon. The left
genal is not visible. Note the large inflated glabella.