Acorn barnacle and acorn shell are vernacular names for certain types of stalkless barnacles, generally excluding stalked or gooseneck barnacles. As adults they are typically cone-shaped, symmetrical, and attached to rocks or other fixed objects in the ocean. Members of the barnacle order Balanomorpha are often called acorn barnacles.[1][2]
![](https://upload.wikimedia.org/wikipedia/commons/thumb/7/7d/Acorn_Barnacles_-_Flickr_-_brewbooks.jpg/220px-Acorn_Barnacles_-_Flickr_-_brewbooks.jpg)
![](https://upload.wikimedia.org/wikipedia/commons/thumb/4/41/Semibalanus_balanoides_2257.jpg/220px-Semibalanus_balanoides_2257.jpg)
In addition, several species of barnacles are specifically called by the common name "acorn barnacle", including:[3][4][5]
- Balanus glandula, common acorn barnacle[6]
- Balanus nubilus, giant acorn barnacle
- Chthamalus antennatus, acorn barnacle
- Megabalanus coccopoma, titan acorn barnacle
- Megabalanus tintinnabulum, titan acorn barnacle
- Paraconcavus pacificus, red-striped acorn barnacle
- Semibalanus balanoides, northern acorn barnacle[7][8]
References
- ^ Chan, Benny K. K.; Dreyer, Niklas; Gale, Andy S.; Glenner, Henrik; et al. (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. hdl:11250/2990967.
- ^ "Chthamaloidea Report". Integrated Taxonomic Information System. Retrieved 2021-08-23.
- ^ Brusca, Richard C. (1980) [1973]. "10. Introduction to the Phylum Arthropoda: Crustacea Cirripedia (Barnacles)". Common intertidal invertebrates of the Gulf of California (2 ed.). Tucson: University of Arizona Press. p. 208. ISBN 0-8165-0682-5.
- ^ Kingsley, John Sterling (1888). "Sub-class I. Cirripedia". In Kingsley, John Sterling (ed.). The Riverside natural history. Vol. II. Crustacea and insects. Cambridge, USA: Houghton, Mifflin and company; The Riverside Press. p. 14. OCLC 1040570312.
...in the Acorn Barnacle, Balanus,...
- ^ Darwin, C. R. (1854). Living Cirripedia, The Balanidæ, (or sessile cirripedes); the Verrucidæ. Vol. 2. London: The Ray Society. p. 33.
- ^ Carstensen, Richard; Armstrong, Bob; O'Clair, Rita M. (2014) [1950]. The nature of Southeast Alaska: A Guide to plants, animals, and habitats (3 ed.). Portland: Graphic Arts Books (Alaska Northwest Books). pp. PT320. ISBN 9780882409290.
Suborder Balanomorpha (acorn barnacles); Balanus glandula (common acorn barnacle)
- ^ "Semibalanus balanoides (Linnaeus, 1767) - Acorn Barnacle". UK species. Natural History Museum. Retrieved 2020-08-20.
- ^ "An acorn barnacle (Semibalanus balanoides)". Marine Life Information Network (MarLIN). The Marine Biological Association of the UK. 2008-04-17. Retrieved 2020-08-19. (says "an", implying "a kind of")