Geological Magazine; January 2008; v. 145; no. 1;
p. 17-36; DOI: 10.1017/S0016756807003901
© Cambridge University Press (CUP)
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Figure 10. Sinoeocrinus lui (GM-9–2–3676b) with stereomic microstructure from the Kaili Formation. (a) Region of the theca with exposed stereom. (b) Close-up of (a) showing a thecal plate with stereom. (c, d) Close-ups of stereom. (e, i) Middle portions of the holdfast revealing stereom around the margins of stalk plates. (f) Close-up of (e) showing the boundary (indicated by the arrow) between the edge of a plate with stereom and the cleavage surface of a plate infilled by syntaxial calcite cement. (g, h) Portions of the lower holdfast with almost all stalk plates preserved with stereom. (j) Close-up of a single, ornamented stalk plate with stereom. (k) Basal portion of holdfast preserved as a natural mould showing the boundary between holdfast stalk and attachment structure (e.g. Fig. 2). (l) Close-up of (k) with a small remnant of stereom. (a, d, e, i, h, l) Backscatter electron images; (b, c, f, g, j, k) secondary electron images. Scale bars = 1 mm (a, e, g, h, i, k); 600 µm (b, f, j); 100 µm (c, d); 300 µm (l). Abbreviations: c.p. – clay-filled plate; c.s. – cleavage surface; h.p. – holdfast plates; p.m. – plate moulds; s.m. – stereomic microstructure.
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