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(Top) 1 Etymology 2 Taxonomy 3 Distribution 4 References 5 External links

Acastocephala

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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 genusoftrilobite from the middle Silurian, known from the United Kingdom.^[2]

Etymology[edit]

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]

^ ^a ^b ^c ^d 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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