Siphonostomites

Siphonostomites hesionoides is a species of polychaete annelid known only from subtidal lagoon deposits from the Early Eocene of Monte Bolca, Verona, Italy.
It has a fusiform body with chaetae along its length, decreasing in length towards front and rear.

History of classification

Originally described as an alga, 19th century palaeontologists lumped Siphonostomites into wastebasket 'worm' taxa such as Nereites or Eunicites. Roverto formally established the separate genus, without illustration; a full description was not provided until Alessandrello's 1990 work.
It was considered in the 1962 Treatise to belong to the Flabelligeridae, though this designation is treated with some scepticism by modern experts.