thumb|Palaeozoic fructifications of Ferns or Pteridosperms|alt= thumb|'''Psaronius|Psaronius sp. - trunk section|alt= thumb|Pecopteris arborescens - compression foliage'''
thumb|Palaeozoic fructifications of Ferns or Pteridosperms|alt= thumb|'''Psaronius|Psaronius sp. - trunk section|alt= thumb|Pecopteris arborescens - compression foliage
Asterotheca' is a genus of extinct seedless, spore-bearing, vascularized ferns dating from the Carboniferous of the Paleozoic to the Triassic of the Mesozoic.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).