The Echinoid Directory

Subfamily Diplopodiinae Smith & Wright, 1993, p. 221

[ex. Diplopodiidae Smith & Wright, 1993, p. 221]

Diagnosis	Emiratiids with: Ambulacra trigeminate below the ambitus, quadrigeminate to polygeminate above the ambitus.
Range	Middle Jurassic to Upper Cretaceous, Europe, Middle East, India.
Classification and/or Status	Calycina, Phymosomatoida, Emiratiidae,
Remarks	The characteristic ambulacral plating, triads beneath the ambitus and four to six elements per plate above separate this clade. Most taxa have biserial pore zones apically, but Tiaromma is unique in retaining uniserial pore zones. Smith, A. B. & Wright, C. W. 1993. British Cretaceous Echinoids. Part 3, Stirodonta 2 (Hemicidaroida, Arbacioida and Phymosomatoida, part 1). Monograph of the Palaeontographical Society (publication no. 593, part of vol. 147), 199-267, pls 73-92.