Cover photo of Spesbona by Gregg Darling. Find the Ceres Streamjack in the FBIS database (Freshwater Biodiversity Information System) here. Family Platycnemididae Identification Very Small Size Length up to 30mm; Wingspan reaches 38mm. Spesbona angusta is the only member of its genus. The Spesbona is unique in that both sexes are photochromatic. This means that … Continue reading Spesbona (Spesbona angusta)