title: Metamorphosis in a Silurian barnacle.
abstract: Exceptionally preserved fossils from the Wenlock Series (Silurian) of Herefordshire, UK, provide unique evidence of metamorphosis from free-swimming cyprid larva to attached juvenile in a Palaeozoic barnacle. The larva had large brush-like anterior limbs. The juvenile shows the head transformed into a stalk and the development of the primordial condition of five mineralized plates within the carapace. The discovery of a cyprid larva indicates that crown group cirripedes had evolved by the Silurian.
authors.affiliation: Yale University, Department of Geology and Geophysics, PO Box 208109, New Haven, CT 06520-8109, USA. derek.briggs@yale.edu
authors.forename: Derek E G
authors.initials: DE
authors.lastname: Briggs
authors.forename: Mark D
authors.initials: MD
authors.lastname: Sutton
authors.forename: David J
authors.initials: DJ
authors.lastname: Siveter
authors.forename: Derek J
authors.initials: DJ
authors.lastname: Siveter
mesh_terms: D000818:Animals; D005580:Fossils; D007814:Larva / Q000033:anatomy & histology / Q000254:growth & development; D008675:Metamorphosis, Biological; D001468:Thoracica / Q000033:anatomy & histology* / Q000145:classification / Q000254:growth & development*; D006113:United Kingdom