Anthozoa - Scleractinia - Caryophylliidae
Alternative spelling: Platycyathus
Parent taxon: Trochocyathus according to Fromentel 1863
See also Squires 1988
Sister taxa: Trochocyathus (Aplocyathus), Trochocyathus acutus, Trochocyathus adelaidensis, Trochocyathus androiavensis, Trochocyathus antsiranensis, Trochocyathus arenulatus, Trochocyathus balanophylloides, Trochocyathus carbonarius, Trochocyathus cermelli, Trochocyathus chevalieri, Trochocyathus cingulatus, Trochocyathus collignoni, Trochocyathus coloradoensis, Trochocyathus conulus, Trochocyathus corallinus, Trochocyathus crassus, Trochocyathus crooki, Trochocyathus cruciana, Trochocyathus cupuliformis, Trochocyathus depressus, Trochocyathus duncani, Trochocyathus egerius, Trochocyathus gardnerae, Trochocyathus hanzawai, Trochocyathus harveyanus, Trochocyathus hemisphaericus, Trochocyathus imparipartitus, Trochocyathus imperialis, Trochocyathus infracompressus, Trochocyathus lakii, Trochocyathus laminus, Trochocyathus madagascariensis, Trochocyathus mamillatus, Trochocyathus maplestonei, Trochocyathus mediterraneus, Trochocyathus mexicanum, Trochocyathus michelottii, Trochocyathus microphyes, Trochocyathus microphyllus, Trochocyathus mitratus, Trochocyathus nomlandi, Trochocyathus oregonensis, Trochocyathus paliscus, Trochocyathus perarmatus, Trochocyathus pergranulatus, Trochocyathus perrini, Trochocyathus persicus, Trochocyathus planicostatus, Trochocyathus plicatus, Trochocyathus pyrenaicus, Trochocyathus revolutus, Trochocyathus sachalinensis, Trochocyathus schmidti, Trochocyathus sellardsi, Trochocyathus sismondae, Trochocyathus speciosus, Trochocyathus stantoni, Trochocyathus striatus, Trochocyathus subarcuatus, Trochocyathus sublaevis, Trochocyathus taylorensis, Trochocyathus thorenti, Trochocyathus townsendensis, Trochocyathus uber, Trochocyathus umbrella, Trochocyathus valceppiensis, Trochocyathus wilkinsoni, Trochocyathus wiltshirei, Trochocyathus wintoni, Trochocyathus woolmani, Paratrochocyathus cupuliformis, Tethocyathus walbersdorfensis, Tethocyathus prahli
Subtaxa: Platycyathus eburnensis Platycyathus grahami Platycyathus kawakamiensis Platycyathus orbignyi Platycyathus scottianus Platycyathus yezoensis Trochocyathus (Platycyathus) powelli
Ecology: stationary low-level epifaunal suspension feeder
Distribution:
• Miocene of New Zealand (1 collection)
• Oligocene of France (2), United States (1: Washington)
• Eocene of Cote D'Ivoire (1), United States (1: California)
• Paleocene to Eocene of Australia (1)
• Paleocene of United States (1: California)
• Cretaceous of Australia (1), France (1), Japan (1), the Russian Federation (1), Switzerland (1), United States (12: Alaska, Arizona, California, Texas, Utah)
Total: 25 collections including 27 occurrences