Calamostoma

Calamostoma is an extinct relative of the ghost pipefish that lived during the early Eocene. It contains a single species, C. lesiniforme (sometimes erroneously referred to as C. breviculum) from the famous Monte Bolca site of Italy. It is one of the few known fossil ghost pipefishes. Calamostoma and the other Bolca solenostomid, Solenorhynchus, are both placed in the extinct subfamily Solenorhynchinae.