Acrothyra gregaria is a species of gregarious brachiopod known from the Middle Cambrian Burgess Shale. 253 specimens of Acrothyra are known from the Greater...

feeder, but uniquely it attached itself to the seabed with a long pedicle. Acrothyra Lingulata Walcott Quarry A species of gregarious brachiopod. It was originally...

Name Novelty Status Authors Age Unit Location Notes Images Acrothyra bonnia Sp. nov Valid Skovsted et al. Cambrian Stage 4 Forteau Formation  Canada ( Newfoundland...

Family: †Acrotretidae Schuchert, 1893 Genera Acrotreta Kutorga, 1848 (type) Acrothyra Matthew, 1901 Aktassia Popov, 1976 Amictocracens HENDERSON & MACKINNON...

fossilized remains have been reported from within the US state of Idaho. †Acrothyra †Adrianites †Agnostus †Amplexus † Ananias Archaeolithophyllum †Atrypa...

locality for species †Acrothele speciosa – type locality for species †Acrothyra †Acrothyra minor †Acrotreta †Acrotreta definita †Acrotreta eucharis – type locality...

in Alabama. †Acanthopyge †Acmarhachis †Acmarhachis typicalis †Acodus †Acrothyra †Acutichiton †Adamsoceras †Agnostotes clavata – or unidentified comparable...

Acritosia Acrobelesia (fossil per IRMNG) Acrobrochus Acrospirifer Acrothele Acrothyra Acrothyris Acrotreta Acrotretella Actinoconchus Actinomena Acuminothyris...

†Acrospirifer †Acrospirifer murchisoni – or unidentified related form †Acrothyra †Actinostroma †Acutichiton †Acutichiton gracilis – type locality for species...