Crymostygius

{{Short description|Genus of crustaceans}} {{Speciesbox | name = ''Crymostygius thingvallensis'' | grandparent_authority=Kristjánsson & Svavarsson, 2004 | parent_authority=Kristjánsson & Svavarsson, 2004 | genus = Crymostygius | species = thingvallensis | authority = Kristjánsson & Svavarsson, 2004 }} '''''Crymostygius thingvallensis''''' is a species of subterranean amphipod crustacean, endemic to the area around Þingvallavatn, a lake in southwestern Iceland.<ref name="Kristjánsson">{{cite journal |author1=B. K. Kristjánsson |author2=J. Svavarsson |year=2004 |title=Crymostygidae, a new family of subterranean freshwater gammaridean amphipods (Crustacea) recorded from subarctic Europe |journal=Journal of Natural History |volume=38 |issue=15 |pages=1881–1894 |doi=10.1080/00222930310001597295}}</ref> The species has no close relatives, and is placed in its own family, '''Crymostygidae'''.<ref name="Kristjánsson"/> This distinctness has been confirmed by molecular phylogenetics.<ref>{{cite journal |author1=Etienne Kornobis |author2=Snæbjörn Pálsson |author3=Dmitry A. Sidorov |author4=John R. Holsinger |author5=Bjarni K. Kristjánsson |year=2011 |title=Molecular taxonomy and phylogenetic affinities of two groundwater amphipods, ''Crangonyx islandicus'' and ''Crymostygius thingvallensis'', endemic to Iceland |journal=Molecular Phylogenetics and Evolution |volume=58 |issue=3 |pages=527–539 |doi=10.1016/j.ympev.2010.12.010 |pmid=21195201}}</ref>

==References==

Category:Crangonyctoidea Category:Monotypic amphipod genera Category:Endemic fauna of Iceland