Leptasterias aequalis: Difference between revisions
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{{Short description|Species of starfish}} |
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{{Italic title}} |
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{{Speciesbox |
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{{Taxobox |
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| genus = Leptasterias |
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| species = aequalis |
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| phylum = [[Echinoderm]]ata |
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| classis = [[Asteroidea]] |
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| ordo = [[Forcipulatida]] |
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| familia = [[Asteriidae]] |
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| genus = ''[[Leptasterias]]'' |
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| species = '''''L. aequalis''''' |
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| binomial = ''Leptasterias aequalis'' |
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'''''Leptasterias aequalis''''', [[common name]]s '''little six-rayed seastar''' or '''six-armed star''', is a species of [[starfish]]. |
'''''Leptasterias aequalis''''', [[common name]]s '''little six-rayed seastar''' or '''six-armed star''', is a species of brooding [[starfish]].<ref name=":0" /> |
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This is a small species, with a total width of only about {{convert|5|cm}}. The coloration is extremely variable. |
This is a small species, with a total width of only about {{convert|5|cm}}. The coloration is extremely variable. |
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This seastar is found in the |
This seastar is found in the northeastern [[Pacific Ocean]],<ref>{{Cite web |date=2019-03-04 |title=The Pacific Ocean—facts and information |url=https://www.nationalgeographic.com/environment/article/pacific-ocean |archive-url=https://web.archive.org/web/20210421025443/https://www.nationalgeographic.com/environment/article/pacific-ocean |url-status=dead |archive-date=April 21, 2021 |access-date=2022-05-06 |website=Environment |language=en}}</ref> from [[Washington (U.S. state)|Washington]]<ref>{{Cite web |title=Washington {{!}} State Capital, Map, History, Cities, & Facts {{!}} Britannica |url=https://www.britannica.com/place/Washington-state |access-date=2022-05-06 |website=www.britannica.com |language=en}}</ref> to [[Southern California]]. It lives on rocky shores, in the mid-[[intertidal zone]]. |
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Many sea-stars broadcast |
Many sea-stars broadcast-spawn their embryos, where fertilization occurs in the water column; however, Leptasterias species brood their embryos locally. The stars form mating aggregations and the female sits on her brood for a period of 6–8 weeks while the embryos develop underneath. Eventually, the embryos fully metamorphose into juvenile sea-stars and walk away, and thus can only locally disperse. Larger females produce larger embryos of great quality; however, as larger broods are produced, a considerable proportion of them are lost.<ref name=":0">{{Cite journal|title=Variability in broods of the seastar Leptasterias aequalis|last=Bingham|first=Brian|journal=Canadian Journal of Zoology|date=2004|volume=82|issue=3|pages=457–463|doi=10.1139/z04-009|url=https://digitalcommons.iwu.edu/cgi/viewcontent.cgi?article=1009&context=bio_scholarship}}</ref> |
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{{Reflist}} |
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==External links== |
==External links== |
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* CalPhoto image 2: [http://calphotos.berkeley.edu/cgi/img_query?enlarge=0000+0000+0900+0098] |
* CalPhoto image 2: [http://calphotos.berkeley.edu/cgi/img_query?enlarge=0000+0000+0900+0098] |
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<references /> |
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{{Taxonbar|from=Q6527894}} |
{{Taxonbar|from=Q6527894}} |
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[[Category:Leptasterias]] |
[[Category:Leptasterias|aequalis]] |
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[[Category: |
[[Category:Echinoderms described in 1862]] |
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Latest revision as of 21:22, 1 October 2024
| Leptasterias aequalis | |
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Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Echinodermata |
| Class: | Asteroidea |
| Order: | Forcipulatida |
| Family: | Asteriidae |
| Genus: | Leptasterias |
| Species: | L. aequalis
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| Binomial name | |
| Leptasterias aequalis (Stimpson, 1862)
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Leptasterias aequalis, common names little six-rayed seastar or six-armed star, is a species of brooding starfish.[1]
This is a small species, with a total width of only about 5 centimetres (2.0 in). The coloration is extremely variable.
This seastar is found in the northeastern Pacific Ocean,[2] from Washington[3] to Southern California. It lives on rocky shores, in the mid-intertidal zone.
Many sea-stars broadcast-spawn their embryos, where fertilization occurs in the water column; however, Leptasterias species brood their embryos locally. The stars form mating aggregations and the female sits on her brood for a period of 6–8 weeks while the embryos develop underneath. Eventually, the embryos fully metamorphose into juvenile sea-stars and walk away, and thus can only locally disperse. Larger females produce larger embryos of great quality; however, as larger broods are produced, a considerable proportion of them are lost.[1]
References
[edit]- ^ a b Bingham, Brian (2004). "Variability in broods of the seastar Leptasterias aequalis". Canadian Journal of Zoology. 82 (3): 457–463. doi:10.1139/z04-009.
- ^ "The Pacific Ocean—facts and information". Environment. 2019-03-04. Archived from the original on April 21, 2021. Retrieved 2022-05-06.
- ^ "Washington | State Capital, Map, History, Cities, & Facts | Britannica". www.britannica.com. Retrieved 2022-05-06.
External links
[edit]
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