It is only known from Devon in Great Britain, having been discovered in 2004 at the National Trust's Hembury Woods by amateur naturalist Bob Heckford, for whom it is named.
Nó là loài duy nhất được tìm thấy ở Devon in Đảo Anh, having been discovered năm 2004 at the National Trust's Hembury Woods by amateur naturalist Bob Heckford, for whom it is named.