Abstract
AbstractA new genus of flabellid scleractinian coral,Periplacotrochus, is described from the late Eocene to middle Miocene of Victoria, South Australia, and Tasmania. It differs fromPlacotrochusin having a pedicellate base, and fromFlabellumin having a lamellar columella. Six previously described species are redescribed, illustrated, and reassigned to this genus (P. deltoideusDuncan, 1864, P. corniculatusDennant, 1899, P. elongatusDuncan, 1864, P. pueblensisDennant, 1903, P. inflectusDennant, 1903, andP. magnusDennant, 1904), and one new species is described:P. cudmorei. One species,Placotrochus elegansTennison-Woods, 1878a, is considered as a nomen dubium. A key is provided to the seven species placed in this genus.
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