TY - JOUR T1 - Morphology and wall ultrastructure of the Devonian spore Acinosporites macrospinosus Richardson 1965 and its bearing on the origin of the megaspore apical prominence JO - International Journal of Plant Sciences UR - https://eprints.whiterose.ac.uk/id/eprint/219350 PY - 2022/05/24 AU - Wellman CH ED - DO - DOI: 10.1086/720388 PB - University of Chicago Press VL - 183 IS - 6 SP - 441 EP - 449 Y2 - 2025/12/19 ER -