Pachydiadema

Taxonavigation

Taxonavigation: Balanomorpha
Superregnum: Eukaryota Cladus: Unikonta Cladus: Opisthokonta Cladus: Holozoa Regnum: Animalia Subregnum: Eumetazoa Cladus: Bilateria Cladus: Nephrozoa Cladus: Protostomia Cladus: Ecdysozoa Cladus: Panarthropoda Phylum: Arthropoda Cladus: Pancrustacea Superclassis: Multicrustacea Classis: Thecostraca Subclassis: Cirripedia Superordo: Thoracica Ordo: Sessilia Subordo: Balanomorpha

Superfamilia: †Pachydiadematoidea
Genus: †Pachydiadematidae
Genus: †Pachydiadema
Species: †P. cretaceum

Name

• Pachydiadema Withers, 1935: 389
  • Considered by Buckeridge, 1995: 261, to not bear convincing features of balanomorphs. Likely is either brachylepadomorph or unusual scalpellomorph. Most other authors consider it as Balanomorpha? incertae sedis (Gale & Sørensen, 2014)
  • Original status: valid subgenus
  • Type species: Catophragmus (Pachydiadema) cretaceum Withers, 1935: 390, by original designation
  • ZooBank: 573B095C-71B0-439A-AA16-2EF81AE9CB22

References

• Withers, T.H. 1935: Catalog of fossil Cirripedia in the Department of Geology of the British Museum. Vol. 2, Cretaceous. London, British Museum, 433 p. Reference page.  [See p. 389, as Catophragmus (Pachydiadema), original description]

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• Buckeridge, J.S. 1995: Phylogeny and biogeography of primitive sessilia and consideration of Tethyan origin for the group. IN Schram, F.R. & Hoeg, J.T., eds., New frontiers in barnacle evolution. Crustacean Issues, 10: 255–267. Reference page.  [See p. 261, discussion of placement]
• Chan, B.K-K., Dreyer, N., Gale, A.S., Glenner, H., Ewers-Saucedo, C., Perez-Losada, M., Kolbasov, G.A., Crandall, K.A. & Høeg, J.T. 2021. The evolutionary diversity of barnacles, with an updated classification of fossil and living forms. Zoological Journal of the Linnean Society 193(3): 789–846. DOI: 10.1093/zoolinnean/zlaa160 Reference page.  [See p. 45, placement in own family]
• Gale, A.S. & Sørensen, A.M. 2014. Origin of the balanomorph barnacles (Crustacea, Cirripedia, Thoracica): new evidence from the Late Cretaceous (Campanian) of Sweden. Journal of Systematic Palaeontology 13(9): 781–824. DOI: 10.1080/14772019.2014.954824 Reference page.  [See p. 26, as Pachydiadema, placement in basal balanomorpha]
• Newman, W.A.; Ross, E. 1976: Revision of the balanomorph barnacles; including a catalog of the species. Memoirs of the San Diego Society of Natural History, (9) BHL Reference page.  [See p. 40, as Pachydiadema]