Diagnoza

Sclerites from the body wall have alternating pores centrally; along their longer axis are two large oval pores, with two smaller and drop−shaped pores along their shorter axis.

Porównanie

Rotulae, when compared with those from Rotasaccus, do not have the central groove at the oral surface, although the general outline is typical of the genus. Plates from the tube−feet have the broadest marginal zone of the species (Ornatoserra, Rotasaccus), where the structure could be observed. Moreover, the ratio of branched vs. straight forms is the highest. This species differs from Protocaudina dulcis in the structure of its wheels; pores at the centre of a sclerite are opposite, spokes are wider, and the ring is broader. Moreover, they have ten and not eight marginal pores.Rotasaccus differs from M. praedulcis in having four pores at the hub of its wheels.

Autekologia

Występowanie geograficzne

Sets XVII, XVIII of the Skały Beds at Skały, Holy Cross Mountains, Poland.

Zasięg czasowy

Late Eifelian 

Materiały muzealne

Holotype GIUS 4−671 Ska./791/2 and 79 specimens.

Literatura

Boczarowski, A. 2001. Isolated sclerites of Devonian non-pelmatozoan echinoderms. Palaeontologia Polonica 59, 3–220.