Synonym: Plastosciara (Spathobdella) tuberculata Tuomikoski, 1960.
Literature: Cratyna (Spathobdella) tuberculata (Tuomikoski) — Menzel & Mohrig (2000): 270. Cratyna (Spathobdella) longispina (Pettey) — Mohrig et al. (2013): 198.
Habitats. Adults have been found in high mountains, at the flowers of moss campion Silene acaulis (L.) Jacq (Caryophyllaceae) (Menzel et al. 2006).
Distribution. Known from Canada (Alberta, Nova Scotia, Ontario), Finland, Great Britain, North Korea, Norway, Sweden, USA (Maine, Montana) (Tuomikoski 1960; Mohrig et al. 1992; Menzel et al. 2006; Heller et al. 2009; Mohrig et al. 2013).
Remarks. Mohrig et al. (1992) recorded this species from North Korea under the synonym Plastosciara tuberculata Tuomikoski.