The Silurian trilobites of the Girvan District Strathclyde region, Scotland.
The trilobite fauna of the Silurian successions of the Girvan
area, Strathclyde Region, Scotland, is revised. Twenty eight genera (one
new) belonging to the Scutelluidae, Illaenidae, Proetidae, Brachymetopidae,
Aulacopleuridae, Harpetidae, Cheiruridae, Encrinuridae, Calymenidae, Phacopidae,
Pterygometopidae, Lichidae and Odontopleuridae are represented,
and include thirty nine named species (fifteen new), and twenty nine forms
under open nomenclature. The fauna is interpreted as having occupied a
shallow shelf environment. The distribution of trilobite species is compared
with the shore-parallel brachiopod communities recognized in rocks of
the same age in Wales and the Welsh Borderland.