The History of Herbivory on Sphenophytes: A New Calamitalean with an Insect Gall from the Upper Pennsylvanian of Portugal and a Review of Arthropod Herbivory on an Ancient LineageDOI: info:10.1086/707105v. 181No. 4UNIV CHICAGO PRESS387–418
Correia, Pedro, Bashforth, Arden R., Simunek, Zbynek, Cleal, Christopher J., Sa, Artur A., and Labandeira, Conrad C. 2020. "The History of Herbivory on Sphenophytes: A New Calamitalean with an Insect Gall from the Upper Pennsylvanian of Portugal and a Review of Arthropod Herbivory on an Ancient Lineage." International journal of plant sciences, 181, (4) 387–418. https://doi.org/10.1086/707105.