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ambulacral plating pseudocompound; pore-pairs in oblique arcs of 3, each associated with a primary tubercle
interambulacral plates wide with single large primary tubercle; primary tubercle perforate and crenulate, and with sunken areole. Areoles confluent at ambitus and adorally; scrobicular tubercles weakly differentiated
perignathic girdle well developed; composed of large apophyses
lantern with grooved teeth
primary spines stout, cylindrical, without cortex.
Range
Middle Triassic, Europe
Remarks
This cidaroid resembles Lenticidarisin its interambulacral structure and tuberculation, but is immediately distinguished from this, and indeed from most other cidaroids, by its unique pseudocompound ambulacra and broad pore zones. Only Heterocidaris and Serpianotiarishave comparable ambulacra, and they both have different tuberculation and perignathic girdle. The taxon was described in admirable detail by Hagdorn (1995).
Hagdorn, H. 1995. Die Seeigel des germainischen oberen Muschelkalks. Geologisches und Palaontologisches Mittelilungen, Innsbruck.20, 245-281.