Traits taxon details
original description
Murchison, R. I. (1839). The Silurian system, founded on geological researches in the counties of Salop, Hereford, Radnor, Montgomery, Caermarthen, Brecon, Pembroke, Monmouth, Gloucester, Worcester, and Stafford : with descriptions of the coalfields and overlying formations. [Book, 3 volumes, vol 1 by Murchison] John Murray, Albemarle Street., available online at http://www.biodiversitylibrary.org/bibliography/88029#/summary page(s): 699,700, plate 27 figure 2; note: 'worm' tracks in Llampeter rocks in Wales (Cambria) [details]
|