Triarthrus becki, showing the appendages. According to recent literature the species depicted, even though it is called Triarthrus becki by Beecher himself in the caption, is in fact Triarthrus eatoni.[1]
↑ (1983). "A revision of the Ordovician olenid trilobite Triarthrus". Geological Magazine120 (6): 567–577.
Date
Between 1890 and the mid 1930's
Source
The Jesse Earl Hyde Collection, Case Western Reserve University (CWRU) Department of Geological Sciences http://geology.cwru.edu/~huwig/
Author
Compiled by Jesse Earl Hyde, various authors, Beecher
Other versions
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{{Information |Description=Triarthrus becki, showing the appendages. |Source=The Jesse Earl Hyde Collection, Case Western Reserve University (CWRU) Department of Geological Sciences http://geology.cwru.edu/~huwig/ |Date=Between 1890 and the mid 1930's |Au
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