Acaste (genus)

Acaste Temporal range: 443–397 Ma PreЄ Є O S D C P T J K Pg N Silurian to Devonian

Acaste downingiae, on display at the Natural History Museum, London
Scientific classification
Kingdom:	Animalia
Phylum:	Arthropoda
Class:	Trilobita
Superorder:	Phacopina
Order:	Phacopida
Superfamily:	Acastoidea
Family:	Acastidae
Genus:	Acaste Goldfuss, 1843
Species
A. downingiae (Murchison, 1843) (type) synonyms Calymene downingiae, Phacops downingiae var. α. vulgaris A. dayiana R. Richter & E. Richter, 1954 A. inflata (Salter, 1864) synonym Phacops downingiae var. γ. inflatus A. lokii Edgecombe, 1993 synonym A. longisulcata, pro parti (mixed collection) A. podolica Balashova, 1968 A. subcaudata (Murchison, 1839) synonyms Asaphus subcaudatus, A. cawdori A. talebensis Hollard, 1963 A. zerinae Edgecombe, 1993
Synonyms
Acastina

Acastina

Acaste is a genus of extinct trilobite of the order Phacopida which lived throughout the Silurian period. They are characterized by a convex dorsal surface, an absence of spines, a shortening of the head-shield and a general rounding off of all angles. Species include Acaste downingiae (Wenlock Series).

Some species originally designated to Acaste have now been reassigned to other genera.

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