Acastocephala

Acastocephala; Temporal range: Silurian
Scientific classification
Kingdom:	Animalia
Phylum:	Arthropoda
Class:	Trilobita
Order:	Phacopida
Family:	Acastidae
Genus:	Acastocephala; Shergold, 1966
Species
	A. macrops (Salter, 1864) (type) synonym Phacops downingiae var. β. macrops; A. dudleyensis Shergold, 1966[1];

Acastocephala is a genus of trilobite from the middle Silurian, known from the United Kingdom.

Etymology

The name is derived from the genus Acaste and the Ancient Greek κεφαλή (kephalē) "head", indicating the headshield is similar to Acaste.[1]

Acastocephala may contain the ancestor of Acastava.[1]

A. macrops occurs in the Middle Silurian of the United Kingdom (Wenlock Shale, Malvern, Worcestershire; Wenlock Limestone, Pen-y-Lan, Cardiff, and Dudley and Ludlow, Ledbury, Hereford).
A. dudleyensis has been found in the Middle Silurian of the United Kingdom (Wenlock Limestone, Wren's Nest, Dudley, Worcestershire).[1]

Shergold, J.H. (1966). "A revision of Acaste downingiae (Murchison) and related trilobites" (PDF). Palaeontology. 9 (2): 183–207. Archived from the original (PDF) on 2011-07-16.

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