From Wikimedia Commons, the free media repository
Jump to navigation Jump to search
Galeaspida (it); Galeaspida (hu); Cá giáp mũ (vi); 盔甲魚類 (zh); Galeaspida (ast); Galeàspid (ca); Galeaspides (fr); Galeaspida (de); Galeaspida (pt); Galeaspida (sq); کلاه‌خودسپران (fa); Galeaspida (bg); Galeaspida (ru); Galeaspida (ro); ガレアスピス目 (ja); Galeaspida (ia); Galeaspida (sk); Galeaspida (war); Galeaspida (pl); Galeaspida (uk); Galeaspida (nl); 盔甲魚綱 (zh-hant); Galeaspida (es); Galeaspida (la); Galeaspida (fi); Galeaspida (en); Galeaspida (ceb); 盔甲鱼纲 (zh-hans); Galeaspida (ga) class of chordates (en); رده‌ای از مهره‌داران (fa); طائفة من الحبليات (ar); klasse uit de onderstam gewervelden (nl) Galeaspidi (it); Galeaspidae, Galeaspida (fr); Galeaspida (vi); Galeáspidos, Galeaspido, Galeáspido, Galeaspidos (es); 盔甲鱼纲 (zh); Galeaspida (ca)
class of chordates
Galeaspida 1.JPG
Upload media
Wikipedia-logo-v2.svg  Wikipedia
Wikispecies-logo.svg  Wikispecies
Instance oftaxon
Start time440th millennium BC
End time401st millennium BC
Common name
Authority control
Edit infobox data on Wikidata

Galeaspida ("Helmet shields") is an extinct taxon of jawless marine and freshwater fish. Their name is derived from a Latin word for helmet, galea, and refers to their massive bone shield on the head. Galeaspida lived in shallow, fresh water and marine environments during the Silurian and Devonian times (430 to 370 million years ago) of what is now China and Vietnam. Their morphology is superficially similar to that of the Heterostraci more than the Osteostraci, as there is currently no evidence that the galeaspids had paired fins. However, the Galeaspida are regarded as being more closely related to the Osteostraci than Heterostraci as the morphology of the braincase is more similar to that of Osteostraci than Heterostraci.


This category has only the following subcategory.


Media in category "Galeaspida"

The following 15 files are in this category, out of 15 total.