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Roweaster Smith & Wright, 2012, p. 642

Diagnostic Features	Thin shelled genus of Micrasteridae Apical disc ethmophract with four gonopores Petals with smooth interporiferous zone Periplastronal zones smooth to faintly sandy Labral plate widest at rear, only just reaching sternal plate 2a and abutting sternal plate 2b along a long and strongly curved suture; labral plate sparsely tuberculate or naked. Sternal plates strongly asymmetric, with an oblique median suture Peristome large open and downward-facing, with a surrounding rim Subanal fasciole present; no other fascioles.
Distribution	Upper Cretaceous (Lower Turonian to Coniacian), Europe
Name gender	masculine
Type	Micraster corbovis Forbes, in Dixon, 1850, p. 342, by original designation.  Holotype BMNH 30157.
Species Included	R. corbovis (Forbes, in Dixon 1850); Upper Turonian and Lower Coniacian, western Europe. R. joviniacensis (Lamber, in Lambert & Thiery, 1924); Turonian, England and France R. sanctaemaurae (Gauthier, 1886); Lower Turonian, England and France
Classification and/or Status	Irregularia, Spatangoida, Micrasterina, Micrasteridae
Remarks	A full description and discussion of this genus is found in Smith & Wright (2012). Smith, A. B. & Wright, C. V. 2012. British Cretaceous echinoids. Part 9, Atelostomata, 2. Spatangoida (2). Monograph of the Palaeontographical Society, London: 635-753, pls 210-253 (Publication umber 639, part of volume 166 for 2012).