Balanomorpha (Suborder) > Balanoidea (Superfamily) > Archaeobalanidae (Family) > Acastinae (Subfamily)
Acasta
    Acasta spongites (Poli, 1791) - Sponge barnacle
Balanomorpha (Suborder) > Balanoidea (Superfamily) > Archaeobalanidae (Family) > Archaeobalaninae (Subfamily)
Hesperibalanus
      Hesperibalanus fallax (Broch, 1927) 
      - Warm-water barnacle (non-native species)
Balanomorpha (Suborder) > Balanoidea (Superfamily) > Archaeobalanidae (Family) > Semibalaninae (Subfamily)
Semibalanus
      Semibalanus balanoides (Linnaeus, 1758) 
        - An Acorn barnacle
Balanomorpha (Suborder) > Balanoidea (Superfamily) > Balanidae (Family) > Balaninae (Subfamily)
Amphibalanus
    Amphibalanus improvisus (Darwin, 1854)    - Bay barnacle
Balanus
      Balanus crenatus Bruguiére, 1789 - An Acorn  barnacle
      Balanus trigonus Darwin, 1854 
      - An Acorn barnacle (non-native species)
Balanomorpha (Suborder) > Balanoidea (Superfamily) > Balanidae (Family) > Concavinae (Subfamily)
Perforatus
      Perforatus perforatus (Bruguière, 1789) 
        - Perforate barnacle
Balanomorpha (Suborder) > Balanoidea (Superfamily) > Balanidae (Family) > Megabalaninae (Subfamily)
Megabalanus
      Megabalanus tintinnabulum (Linnaeus, 1758) 
    - Giant purple or Titan acorn barnacle (non-native species)
    Megabalanus tulipiformis (Ellis, 1758) 
    - An Acorn barnacle (non-native species)
Balanomorpha (Suborder) > Balanoidea (Superfamily) > Pyrgomatidae (Family) > Megatrematinae (Subfamily) > Pyrgominini (Tribe)
Balanomorpha (Suborder) > Chthamaloidea (Superfamily) > Chthamalidae (Family) > Chthamalinae (Subfamily)
    
Chthamalus
      Chthamalus montagui Southward, 1976 
      - Montagu's stellate barnacle
    Chthamalus stellatus (Poli, 1795) 
    - Poli's stellate barnacle
Balanomorpha (Suborder) > Coronuloidea (Superfamily) > Platylepadidae (Family) > Stomatolepadinae (Subfamily)
Stomatolepas
    Stomatolepas dermochelys Monroe & Limpus, 1979 
  
    - A Turtle barnacle (parasitic / pelagic)
Balanomorpha (Suborder) > Tetraclitoidea (Superfamily) > Austrobalanidae (Family) > Elminiinae (Subfamily)
Austrominius
      Austrominius modestus (Darwin, 1854)  - Australasian or Darwin's barnacle (invasive non-native species)
Balanomorpha (Suborder) > Tetraclitoidea (Superfamily) > Tetraclitidae (Family) > Tetraclitinae (Subfamily)
Verrucomorpha (Suborder) > Verrucidae (Family)
Verruca
    Verruca stroemia O.F. Müller, 1776  - Wart barnacle
Other barnacle images
        Barnacle cyprid larvae
    Exuvia of adult barnacle
Stalked barnacles (Order Scalpelliformes)
Pollicipedidae (Family)
Pollicipes
      Pollicipes pollicipes (Gmelin, 1790) 
    - A Gooseneck or Pollicipedid barnacle
Scalpellidae (Family) > Scalpellinae (Subfamily)
Scalpellum
      Scalpellum scalpellum (Linnaeus, 1767) 
    - A Scalpellid barnacle
Stalked or Goose barnacles (Order Lepadiformes)
Lepadomorpha (Suborder) > Lepadidae (Family)
    (All species below are pelagic, non-native species)
Dosima
      Dosima fascicularis Ellis & Solander, 1786 
      - Buoy barnacle (pelagic species)
Lepas
      Lepas (Anatifa) anatifera Linnaeus, 1758 
    - Common goose, Smooth goose-neck or Ship barnacle 
    (pelagic species)
    Lepas (Anatifa) anserifera Linnaeus, 1767 
      - A Goose, Goose-neck or Stalked barnacle 
(pelagic species)
      Lepas (Anatifa) hillii Leach, 1818 
      - A Goose, Goose-neck or Stalked barnacle 
      (pelagic species)
      Lepas (Anatifa) pectinata Spengler, 1793
    - A Goose-neck or Duck barnacle (pelagic species)
Various images of Lepas species, 
      commonly called Goose or Stalked barnacles
Parasitic Barnacles
Rhizocephala (Superorder) > Kentrogonida (Order) > Sacculinidae (Family)
Drepanorchis
      Drepanorchis neglecta (Fraisse, 1878) 
    - A parasitic barnacle on Spider crab, Macropodia sp..
Sacculina
      Sacculina carcini Thompson, 1836 
    - Crab hacker barnacle
Sacculina inflata Leuckart, 1859 - A parasitic barnacle on the Common edible crab, Cancer pagurus.
