# Discurria insessa

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Species of gastropod

Discurria insessa Discurria insessa living on a stipe of the feather boa kelp, in California Scientific classification Kingdom: Animalia Phylum: Mollusca Class: Gastropoda Subclass: Patellogastropoda Family: Lottiidae Genus: Discurria Species: D. insessa Binomial name Discurria insessa (Hinds, 1842) Synonyms Lottia insessa

***Discurria insessa***, commonly named the **seaweed limpet**, is a [species](/source/Species) of [sea snail](/source/Sea_snail), a true [limpet](/source/Limpet), a [marine](/source/Marine_(ocean)) [gastropod](/source/Gastropod) [mollusc](/source/Mollusc) in the family [Lottiidae](/source/Lottiidae).

## Description

The size of the shell varies between 10 mm and 38 mm. The apex of the shell is located at the highest point of the shell and slightly forward at the center. The shape of the *Discurria insessa* are nearly oval or can be elongated with the right and left margins of the shell nearly parallel to the distance. The height of the limpet is about 3/4 width. The exterior of the shell is dark brown and usually smooth. [1]

This section needs expansion. You can help by adding missing information. (March 2016)

## Distribution

This marine species occurs from South [Alaska](/source/Alaska) to the [Baja California Peninsula](/source/Baja_California_Peninsula). The geograpichal range of *Disccuria inessa* is Wranglell Island, Alaska, to [Bahía Magdalena](/source/Bah%C3%ADa_Magdalena), [Baja California Sur](/source/Baja_California_Sur). *Disccuria inessa* was abundant in North California but rare north in Oregon.[2][3]

## Ecology

*Discurria insessa* is believed to live only on *[Egregia menziesii](/source/Egregia_menziesii)* (feather boa kelp). Young limpets seem to orient randomly on the [stipe](/source/Stipe_(botany)) but adults are almost always oriented longitudinally along the stipe. *D. insessa* feed both on [epiphytes](/source/Epiphyte) and on the *Egregia* itself. *D. insessa* spawns mainly in spring and summer. There is high mortality during the winter—the largest individuals are usually not more than 1 year old. Larvae settle preferentially on large, crowded, post-reproductive *Egregia* and on fronds which already have adults. They grow fastest if they settle on scars made by older limpets. This species runs away quickly if it contacts a [seastar](/source/Seastar) such as *[Pisaster ochraceus](/source/Pisaster_ochraceus)*.[4]

## References

1. **[^](#cite_ref-1)** ["Discurria insessa"](https://inverts.wallawalla.edu/Mollusca/Gastropoda/Prosobranchia/Order_Patellogastropoda/Family_Lottiidae/DiscurriaInsessa.html). *inverts.wallawalla.edu*. Retrieved 2023-07-26.

1. **[^](#cite_ref-2)** Allen, Richard K. (1976). *Common Intertidal Invertebrates of Southern California*. Palo, Alto, California: Peek Publications. p. 316. [ISBN](/source/ISBN_(identifier)) [0-917962-10-9](https://en.wikipedia.org/wiki/Special:BookSources/0-917962-10-9).

1. **[^](#cite_ref-3)** Carlton, James T. (2007). *The Light and Smith Manual: Intertidal Vertibrates in Central California to Oregon* (4th ed.). California: Hardback, University of California Press. p. 1001. [ISBN](/source/ISBN_(identifier)) [978-0-520-23939-5](https://en.wikipedia.org/wiki/Special:BookSources/978-0-520-23939-5).

1. **[^](#cite_ref-4)** [Discurria insessa](http://www.wallawalla.edu/academics/departments/biology/rosario/inverts/Mollusca/Gastropoda/Prosobranchia/Order_Patellogastropoda/Family_Lottiidae/DiscurriaInsessa.html) [Archived](https://web.archive.org/web/20150122042139/http://www.wallawalla.edu/academics/departments/biology/rosario/inverts/Mollusca/Gastropoda/Prosobranchia/Order_Patellogastropoda/Family_Lottiidae/DiscurriaInsessa.html) 2015-01-22 at the [Wayback Machine](/source/Wayback_Machine) at [Walla Walla University](/source/Walla_Walla_University)

- Nakano T. & Ozawa T. (2007). *Worldwide phylogeography of limpets of the order Patellogastropoda: molecular, morphological and paleontological evidence*. Journal of Molluscan Studies 73(1): 79–99

## External links

- ["*Discurria insessa*"](http://www.gastropods.com/7/Shell_28137.shtml). *Gastropods.com*. Retrieved 16 January 2019.

*Discurria insessa* grazing on the feather boa kelp *[Egregia menziesii](/source/Egregia_menziesii)*.

Taxon identifiers Discurria insessa Wikidata: Q375802 BOLD: 495429 CoL: 6CZHH EoL: 464682 GBIF: 2297815 IRMNG: 10979876 ITIS: 567501 NCBI: 351111 OBIS: 456584 Open Tree of Life: 706110 SeaLifeBase: 1930 WoRMS: 456584 Patella insessa Wikidata: Q109556902 GBIF: 8868110 WoRMS: 888524

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