Gonyaulacysta jurassica subsp. jurassica var. longicornuta
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var. longicornuta Sarjeant, 1982b, p.31-32, pl.5, figs.5-6. Holotype: Sarjeant, 1982b, pl.5, figs.5-6. Age: early-mid Kimmeridgian. Parent: Gonyaulacysta jurassica subsp. jurassica