Australanthus, BITTNER, 1892

Souto, Camilla, Mooi, Rich, Martins, Luciana, Menegola, Carla & Marshall, Charles R., 2019, Homoplasy and extinction: the phylogeny of cassidulid echinoids (Echinodermata), Zoological Journal of the Linnean Society 187, pp. 622-660 : 652

GENUS AUSTRALANTHUS BITTNER, 1892

E m e n d e d d i a g n o s i s: M e d i u m - s i z e d t o l a r g e eurhodiids with rounded to oval and domed test; oral region concave. Anterior petals oval; posterior petals of uniform width. Poriferous zone very wide when compared with interporiferous zone, with three to five reduced primary tubercles. Pore-pairs from middle to end of posterior petals placed towards middle of plate. Occluded plate often present at end of paired petals. Ambulacra beyond posterior petals greatly expanded; pores placed in middle of plate, along suture. Periproct on aboral surface, narrow, longitudinal. About seven to ninve interambulacral plates between basicoronal plate 5 and base of periproct. Naked zone not pitted. Peristome equant, pentagonal. Bourrelets tooth-like. Phyllodes short; up to five phyllopores per half, lacking occluded plates. Sphaeridial pits very small, arranged in groups of three along phyllodes.

Includedspeciesbasedonpresentanalysis: Au.longianus (type species).