Known from Llanrhidian (Ref. 112636), South end (Ref. 112643), Morecambe Bay and Brancaster Harbour (Ref. 113926). C: Refs. 113925, 2823, 7693, 112636, 112643, 112652, 113926; O: Refs. 113925, 113926.
C = country distribution; M = map distribution; O = occurrence data; R = regional distribution