Schneider, C. W. et al., A new species of Digenea (Rhodomelaceae, Ceramiales) based upon a molecular assessment and morphological observations of plants historically known as D. simplex in Bermuda, Phytotaxa, 338(1): 090-098, 2018. (BAMZ #3176/BBP #263)
Museum Collections book...
Kemp, Christopher, The Lost Species: Great Expeditions in the Collections of Natural History Museums, The University of Chicago Press, 2017. (QH45.5.K4). Kindly donated by Lisa Greene.