Basionym Name:Pilophorus acicularis f. hallii Tuck., Proc. Amer. Acad. Arts & Sci. 12: 127 (1877)
Homotypic synonyms:Pilophorus cereolus b hallii (Tuck.) Tuck., Syn. N. Amer. Lich. (Boston) 1: 235 (1882)Pilophorus cereolus f. hallii (Tuck.) Tuck., Syn. N. Amer. Lich. (Boston) 1: 235 (1882)Pilophorus hallii (Tuck.) Vain., Bot. Mag., Tokyo 35: 59 (1921)