Article: The Silurian trilobite Encrinurus variolaris and allied species, with notes on Frammia
R. P. Tripp, J. T. Temple and K. C. Gass
Encrinurus variolaris (Brongniart) from the Wenlock of the Welsh Borderland is redescribed and related species discussed. Of these, E. diabolus from the Llandovery of Shropshire and E. rosensteinae from the Ludlow of the Welsh Borderland are new. The genus Frammia is restricted to F. arctica (Salter) and F. rossica (Maksimova).