Fig. 5

aInexpectacantha acrobatica Thuy, 2010, articulated young postlarva (GZG.INV.30559), ventral view; scale bar equals 200 μm bE. papillata Thuy, 2010, articulated young postlarva (GZG.INV.30560), ventral view; scale bar equals 500 μm. cTropidaster pectinatus Forbes, 1850, early juvenile (R = 1 mm) (NHM EE 13980), abactinal aspect; note large terminal ossicles and interradial grooves; scale bar equals 500 μm. dTropidaster pectinatus Forbes 1850, arm fragment of small individual (R approximately 15 mm) (NHM EE 13981), actinal view; scale bar equals 1 mm. eTropidaster pectinatus Forbes, 1850, partly dissociated individual (NHM EE 13982) showing adambulacral and comb-like adambulacral spines, actinal view; scale bar equals 500 μm. fTropidaster pectinatus Forbes, 1850, lateral adambulacral spines in situ on adambulacrals of small individual (NHM EE 14020); note articulation surfaces and muscle insertion sites; scale bar equals 100 μm. gTropidaster pectinatus Forbes, 1850, abactinal surface of same specimen, showing clusters of spines still attached to terminations of paxilliform abactinal ossicles, essentially in life position; scale bar equals 100 μm. hTropidaster pectinatus Forbes, 1850, isolated adambulacral ossicle (NHM EE 14021), oblique abactinal view, showing preservation of articular surfaces and muscle insertion sites; scale bar equals 500 μm. All from the Pliensbachian Davoei Zone of Sedan, Ardennes, France; level A, road cutting