Harrytoombsia

{{Automatic taxobox

| fossil_range = Late Devonian: Frasnian, {{Fossil range|382.7|372.2}}

|image = Harrytoombsia (Naturhistoriska Riksmuseet).jpg

|image_caption = Model at the Naturhistoriska Riksmuseet in Stockholm

| display_parents = 4

| taxon = Harrytoombsia

| authority = Miles and Dennis, 1979{{cite web|url=https://paleobiodb.org/classic/checkTaxonInfo?taxon_no=34345|title=Fossilworks: Harrytoombsia|website=fossilworks.org|access-date=2021-12-17|archive-date=2021-12-12|archive-url=https://web.archive.org/web/20211212141624/http://www.fossilworks.org/cgi-bin/bridge.pl?a=taxonInfo&taxon_no=34345|url-status=live}}

| subdivision_ranks = Species

| subdivision =

Harrytoombsia elegans Miles and Dennis, 1979 (type)

}}

Harrytoombsia is an extinct genus of arthrodire placoderm from the Early Frasnian stage of the Late Devonian period. Fossils are found from Kimberley, Australia.{{Cite journal |last1=Zhu |first1=You-An |last2=Zhu |first2=Min |last3=Wang |first3=Jun-Qing |date=1 April 2016 |title=Redescription of Yinostius major (Arthrodira: Heterostiidae) from the Lower Devonian of China, and the interrelationships of Brachythoraci |journal=Zoological Journal of the Linnean Society |volume=176 |issue=4 |pages=806–834 |doi=10.1111/zoj.12356|issn=0024-4082 |doi-access=free }} It was a fast-swimming predator, and it had sharp blades of enamel-like material around the outer edge of the jaw for catching prey.{{cite web|url=http://utstallning.nrm.se/fossilochevolution/en/devon/animals/devon1hav/vilketdjur/visarvilketdjur1.4.4f4d16d8151338bf60331de9.html?dinoid=4.4f4d16d8151338bf60331d52|title=Visar vilket djur 1 - NyaUtställningar|website=utstallning.nrm.se}}

Phylogeny

Harrytoombsia is a member of the superfamily Incisoscutoidea, which belongs to the clade Coccosteomorphi,{{Cite journal |author1=You-An Zhu |author2=Min Zhu |title=A redescription of Kiangyousteus yohii (Arthrodira: Eubrachythoraci) from the Middle Devonian of China, with remarks on the systematics of the Eubrachythoraci | journal=Zoological Journal of the Linnean Society |volume=169 |issue=4 |pages=798–819 |year=2013 |doi=10.1111/zoj12089 |doi-access= }} one of the two major clades within Eubrachythoraci. The cladogram below shows the phylogeny of Harrytoombsia: