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. dudleyensisShergold, 1966;

Last updated February 11, 2025

Acastocephala is a genus of trilobite from the middle Silurian, known from the United Kingdom.^[2]

Etymology

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

Taxonomy

Acastocephala may contain the ancestor of Acastava .^[1]

Distribution

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]

References

1 2 3 4 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.
↑ "BioLib: Biological library".

External links

Wenlock Trilobite Acastocephala - Fossilmuseum.net

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[Shergold-1] 1 2 3 4 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.

[2] "BioLib: Biological library".

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