Xylochoarion hacknessense
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*hacknessense Erkmen and Sarjeant, 1978, p.404,406, figs.1–11. Holotype: Erkmen and Sarjeant, 1978, figs.1,5–6; Fensome et al., 1995, figs.1–2,5 — p.1539. Age: Callovian.