# Gammaridea

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{{Short description|Former suborder of crustaceans}}
{{Paraphyletic group
| auto = yes
| taxon = Gammaridea
| authority = [Latreille](/source/Pierre_Andr%C3%A9_Latreille), 1802
| includes = See text
| image =  Gammarini (Gammaridea) delle alghe e della sabbia del litorale del golfo di Napoli (C. Merculiano).jpg
| image_caption = Gammarids from the [Gulf of Naples](/source/Gulf_of_Naples){{efn|From left to right, top to bottom:{{Flatlist|
<!--When linking, please create redirects to the current scientific names-->
* ''[Gammarus locusta](/source/Gammarus_locusta)'' ([Linnaeus](/source/Linnaeus), 1758) (♂ & ♀)
* ''[Amphithoe rubricata](/source/Amphithoe_rubricata)'' (Montagu, 1808) (♂)
* ''[Hyale pontica](/source/Hyale_pontica)'' Rathke, 1836 (♂ & ♀)
* ''[Ampelisca rubella](/source/Ampelisca_rubella)'' [A. Costa](/source/A._Costa), 1864 (♂)
* ''[Deshayesorchestia deshayesii](/source/Deshayesorchestia_deshayesii)'' (Audouin, 1826) (♂)
* ''[Apohyale prevostii](/source/Apohyale_prevostii)'' ([H. Milne Edwards](/source/H._Milne_Edwards), 1830) (♂ & ♀)
* ''[Podocerus brasiliensis](/source/Podocerus_brasiliensis)'' (Dana, 1853) (♂)
* ''[Transorchestia chiliensis](/source/Transorchestia_chiliensis)'' (H. Milne Edwards, 1840) (♂)
* ''[Aora gracilis](/source/Aora_gracilis)'' ([Spence Bate](/source/Spence_Bate), 1857) (♂)
* ''[Maera grossimana](/source/Maera_grossimana)'' (Montagu, 1808) (♂)
* ''[Orchestia gammarellus](/source/Orchestia_gammarellus)'' ([Pallas](/source/Peter_Simon_Pallas), 1766) (♂)
* ''[Cymadusa crassicornis](/source/Cymadusa_crassicornis)'' (Costa, 1853) (♀)}}}}
}}

'''Gammaridea''' was one of the [suborder](/source/suborder)s of the order [Amphipoda](/source/Amphipoda), comprising small, [shrimp](/source/shrimp)-like [crustacean](/source/crustacean)s. In a traditional classification, it encompassed about 7,275 (92%) of the 7,900 species of amphipods described by then, in approximately 1,000 [genera](/source/genus), divided among around 125 [families](/source/Family_(taxonomy)).<ref name="Foster">{{cite book |author1=John M. Foster |author2=Sarah E. LeCroy |author3=Richard W. Heard |author4=Rita Vargas |year=2009|chapter=Gammaridean amphipods |pages=265–274 |editor1=Ingo S. Wehrtmann |editor2=Jorge Cortés |title=Marine Biodiversity of Costa Rica, Central America |volume=86 |series=[Monographiae Biologicae](/source/Monographiae_Biologicae)  |publisher=[Springer](/source/Springer_Science%2BBusiness_Media) |isbn=978-1-4020-8277-1 |chapter-url=https://books.google.com/books?id=m1ifNnkAhAAC&pg=PA266}}</ref> That concept of Gammaridea included almost all [freshwater](/source/fresh_water) amphipods, while most of the members still were marine.

The group is however considered [paraphyletic](/source/paraphyly), and was deconstructed in a series of papers by the amphipod taxonomists [James K. Lowry](/source/James_K._Lowry) and Alan A. Myers. In 2003 they moved several families from Gammaridea to join members of the former  [Caprellidea](/source/Caprellidea) in a new suborder [Corophiidea](/source/Corophiidea).<ref>A. A. Myers & J. K. Lowry (2003). "A phylogeny and a new classification of the Corophiidea Leach, 1814 (Amphipoda)". Journal of Crustacean Biology 23 (2): 443–485. doi:10.1651/0278-0372</ref>  Further, in 2013 another large suborder [Senticaudata](/source/Senticaudata) was established, which would encompass much of the original Gammaridea, particularly its freshwater families, and into which also the Corophiidea was merged.<ref name=LM13>Lowry, J.K. & Myers, A.A. (2013) [http://www.mapress.com/zootaxa/2013/f/zt03610p080.pdf A Phylogeny and Classification of the Senticaudata subord. nov. (Crustacea: Amphipoda)]. Zootaxa 3610 (1): 1-80.</ref><ref name = Senticaudata>[http://www.marinespecies.org/aphia.php?p=taxdetails&id=719424 Senticaudata] [WoRMS](/source/WoRMS)</ref>
The remaining 85 Gammaridea families, of superfamilies [Liljeborgioidea](/source/Liljeborgioidea), [Lysianassoidea](/source/Lysianassoidea) and [Eusiroidea](/source/Eusiridae) were rearranged to the new suborder [Amphilochoidea](/source/Amphilochoidea) in the final subordinal revision (2017), which no longer recognizes Gammaridea as a taxon.<ref name=Lowry2017>{{cite journal |url=http://www.mapress.com/j/zt/article/view/zootaxa.4265.1.1/11015 |doi=10.11646/zootaxa.4265.1.1 |title=A Phylogeny and Classification of the Amphipoda with the establishment of the new order Ingolfiellida (Crustacea: Peracarida) |first1=J.K. |last1=Lowry |first2=A.A. |last2=Myers |journal=[Zootaxa](/source/Zootaxa) |publisher=[Magnolia Press](/source/Magnolia_Press) |volume=4265 |issue=1 |year=2017 |pages=001–089 |pmid=28610392 |doi-access=free }}</ref><ref name=wad>{{BioRef|WoRMS|url=https://www.marinespecies.org/amphipoda/index.php |title=Introduction |db= World Amphipoda Database |access-date=9 January 2025}}</ref>

==References==
{{noteslist}}
{{Reflist|32em}}

==External links==
*{{Commons category-inline}}
*{{Wikispecies-inline}}

{{Taxonbar|from=Q133679}}
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Category:Amphipoda

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Adapted from the Wikipedia article [Gammaridea](https://en.wikipedia.org/wiki/Gammaridea) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Gammaridea?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.