... in particular. We explore this evolution with a phylogenetic analysis of relevant clades with Jurassic times of divergence, finding not only that Sierradiadema n. gen. is the earliest known member of a clade containing the extant Diadematidae, but that it will stimulate ongoing discussion of the putative...

...G. M. Philip Abstract "A new diadematid genus, Kierechinus, is proposed for the species Pedinopsis? melo Kier, from the upper Auradu 'series' (lower Eocene) of British Somaliland. The morphology of the unique holotype is described, and the relationship of Kierechinus to the Diadematidae...

... of Pygasteridae (as in the ‘regular’ Pedinidae Pomel, 1883 ), contrasting this condition with the crenulate tubercles of Holectypidae (as in the ‘regular’ Diadematidae Gray, 1855 ). However, he maintained both families, Holectypidae and Pygasteridae, in the same order, and all irregular echinoids in a unique...

... of Diadema , in Lawrence , J.M. , ed., Edible Sea Urchins: Biology and Ecology : Amsterdam , Elsevier Science , p. 205 – 225 . Nader , M.R. , and El Indary , S. , 2011 , First record of Diadema setosum (Leske, 1778 ) (Echinodermata, Echinoidea, Diadematidae) from Lebanon...