Paraconcavus pacificus

Red-striped acorn barnacle
Scientific classification
Kingdom:	Animalia
Phylum:	Arthropoda
Subphylum:	Crustacea
Order:	Sessilia
Family:	Balanidae
Genus:	Paraconcavus
Species:	P. pacificus
Binomial name
	Paraconcavus pacificus; (Pilsbry, 1916)[1]

Paraconcavus pacificus, the red-striped acorn barnacle,[2] is a species of balanid barnacle known from subtidal sandy habitats of the outer northeastern Pacific coast, from Baja California north to Monterey Bay.[3] It grows to 35 mm in diameter, with pink longitudinal stripes over white plates, and can be distinguished from other large, pink-striped barnacles in its range (e.g. Amphibalanus amphitrite) by the longitudinal striations across the growth rings of its plates.[3] While it will attach to many different kinds of hard substrate, it shows a preference for attaching the shells of other organisms, particularly sand dollars.[3]

References

Carlton, James T. (2007). The Light and Smith manual : intertidal invertebrates from central California to Oregon (4th ed.). Berkeley: University of California Press. ISBN 978-0-520-23939-5.
Sept, J. Duane (2002). The Beachcomber's Guide to Seashore Life of California (1st ed.). Madeira Park, BC, Canada: Harbour Publishing. p. 164. ISBN 1-550172514.
Morris, Robert H.; Abbott, Donald P.; Haderlie, Eugene C. (1980). Intertidal invertebrates of California (1st ed.). Stanford, California: Stanford University Press. ISBN 0-80471045-7.

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[1] Carlton, James T. (2007). The Light and Smith manual : intertidal invertebrates from central California to Oregon (4th ed.). Berkeley: University of California Press. ISBN 978-0-520-23939-5.

[sept-2002-2] Sept, J. Duane (2002). The Beachcomber's Guide to Seashore Life of California (1st ed.). Madeira Park, BC, Canada: Harbour Publishing. p. 164. ISBN 1-550172514.

[morris-1980-3] Morris, Robert H.; Abbott, Donald P.; Haderlie, Eugene C. (1980). Intertidal invertebrates of California (1st ed.). Stanford, California: Stanford University Press. ISBN 0-80471045-7.