Anonyme, The Popular Science Review: a quaterly Miscellany of entertaining, Londres, vol. 1, p. 3,  1877. 

..of a kind of fly ( Phryganeae) which frequented the waters of the Miocene lake in shoals. Around the tubes of the caddis worms are attached numerous minute freshwatter shells (Paludinae, etc) which the caddis worms when livingh agglutinated to their tubes.