Search results

...[[trilobite]]s in the order [[Phacopida]] that lived from the [[Floian]] (Ordovician) to the [[Devonian]] and includes 33 genera.<ref>{{cite book |author=Robert [[Category:Early Ordovician first appearances]] ...

| fossil_range = [[Early Ordovician]]<br>{{Fossil range|480|470}} ...tion|extinct]] [[species]] of [[Agnatha|jawless fish]] that lived in the [[Ordovician]] period, about 480 to 470 million years ago. Its remains were found in the ...

| image_caption = ''[[Vinlandostrophia ponderosa]]'' (Upper Ordovician). ...ared during the [[Early Cambrian]] period and became very diverse by the [[Ordovician]], living in shallow-shelf seas. Orthids are the oldest member of the subp ...

| fossil_range = [[Ordovician]] - [[Permian]] (possibly [[Triassic]]) ...America]], [[Europe]], [[Asia]], [[Africa]], and [[Australia]] from the [[Ordovician]] through [[Triassic]] from 490—203.7 [[Annum|mya]], existing for approxima ...

| fossil_range = {{fossil range|Ordovician|Recent}} ...natlas.org/atlas/bryozoa/stenolaemata/ Stenolaemata.] The Digital Atlas of Ordovician Life.</ref> All extant (living) species are in the order [[Cyclostomatida]] ...

| fossil_range = [[Late Ordovician]], {{Fossil range|450}} ...naspis splendens, new genus, new species, a new ostracoderm from the Upper Ordovician of North America. Proceedings of the United States National Museum 108(3391 ...

...|title=First occurrence of caryocaridids (Crustacea, Phyllocarida) in the Ordovician of North China |url=https://www.sciencedirect.com/science/article/abs/pii/S [[Category:Extant Cambrian first appearances]] ...

| fossil_range = [[Early Ordovician]] – [[Late Ordovician]], {{fossil range|480|455}} ....jpg|thumb|left|''[[Sacabambaspis]]'', the best known arandaspid, from the Ordovician of Bolivia. shows the characteristic, frontally positioned eyes, like car h ...

| image_caption = Receptaculitid from the [[Ordovician]] of [[Estonia]]. ...ll continents except Antarctica.<ref>Rietschel, S. and Nitecki, M.H. 1984. Ordovician Receptaculitid algae from Burma. Palaeontology, vol. 27, p. 415-420.</ref>< ...

| fossil_range = {{fossil range|Upper Ordovician|Recent}} ...ellid brachiopod from the [[Cincinnatian (geology)|Cincinnatian]] (Upper [[Ordovician]]) of SE [[Indiana]]. ...

...range = {{fossilrange|Middle Ordovician|Permian|earliest=Middle Cambrian|[[Ordovician]] - [[Permian]]}} ...ref> They first appear, along with many other echinoderm classes, in the [[Ordovician]] period, and reached their greatest diversity in the [[Mississippian age|M ...

| fossil_range = {{fossil range|Middle Ordovician|Permian|[[Ordovician]]–[[Permian]]}} ...ry rugose coral [[Grewingkia|''Grewingkia canadensis'']] in three views; [[Ordovician]], [[Indiana]] ...

...[[Volkhov River]] region near [[Saint Petersburg]], [[Russia]]. During the Ordovician, the region that is now Eastern [[Europe]] was a shallow inland sea. This e The major extinction event marking the end of the Ordovician Period reduced the diversity of all trilobite orders with most asaphid fami ...

| fossil_range = {{fossil_range|Cambrian Stage 3|Late Ordovician}} ...half of the Lower [[Cambrian]], and the last species did not survive the [[Ordovician–Silurian extinction event]]. ...

| fossil_range = {{fossil range|Early Cambrian|Early Ordovician|ref=<ref name="Dong" />}} ...s allied to [[Ecdysozoa]] and known from strata of Lower Cambrian to Lower Ordovician age containing five [[species]]. ...

| fossil_range = {{fossil range|445|0}}[[Ordovician]] – [[Holocene|Present]] ...ostomes have two major adaptations that relate to [[aquatic respiration]]. First, the early teleostomes probably had some type of [[operculum (fish)|opercul ...

...] [[Phacopida]]. Species belonging to the Phacopina lived from the Lower [[Ordovician]] ([[Tremadocian]]) through the end of the Upper [[Devonian]] ([[Famennian] The Early Ordovician genus ''[[Gyrometopus]]'' (superfamily Dalmanitoidea, family Diaphanometopi ...

...497|359|ref=<ref name=HarperServais>{{cite book|chapter= 20. A synopsis of Ordovician trilobite distribution and diversity|author= J.M. Adrain|title= Early Palae ...net |first3=Claude |last4=Crônier |first4=Catherine |date=2022 |title=Post-Ordovician trilobite diversity and evolutionary faunas |journal=Earth-Science Reviews ...

...rcontinents|paleocontinents]].<ref name='Treatise'>{{cite book|last= Moore|first= R.C.|year= 1959|title= Arthropoda I - Arthropoda General Features, Proarth ...rinella]]''.<ref name=HarperServais>{{cite book|chapter= 20. A synopsis of Ordovician trilobite distribution and diversity|author= J.M. Adrian|title= Early Palae ...

| fossil_range = {{fossil range|480|359|[[Early Ordovician]] to [[Late Devonian]]}} Pteraspidomorphs have been first regarded as related to [[bony fish]]es, then to [[shark]]s, then ancestral ...