Lea, I. (1857). [On
Triquetra lanceolata Lea, with change of name to
Triquetra contorta].
Proceedings of the Academy of Natural Sciences of Philadelphia. 8(6): 300-301 [dated as 1856 by Scudder (1885: 71), but earliest acknowledged receipt documented by Fox (1913: xi) for number 8(5) was 25 April 1857].