''Amygdalotheca'' is an extinct genus of

cornute Cornuta is an extinct order of echinoderms. Along with the mitrate Mitrates are an extinct group of stem group echinoderms, which may be closely related to the hemichordates. Along with the cornutes, they form one half of the Stylophora. ...

stylophora The stylophorans are an extinct, possibly polyphyletic group allied to the Paleozoic Era echinoderms, comprising the prehistoric cornutes and mitrates. It is synonymous with the subphylum Calcichordata. Their unusual appearances have led to a va ...

n known from the Lower Arenig of the Saint-Chinian Formation, southern France.

References

Carboniferous echinoderms Prehistoric echinoderm genera Taxa described in 1969 {{paleo-echinoderm-stub