Product Code Database
Semionotiformes is an order of ray-finned fish known from the Middle Triassic (Anisian) to the Late Cretaceous (Maastrichtian). Their closest living relatives are (Lepisosteidae), with both groups belonging to the clade Ginglymodi within the Holostei. The group includes both freshwater (Semionotidae) and marine (Callipurbeckiidae, Macrosemiidae) adapted forms. Many members of the family Macrosemiidae (which are usually included in Semionotiformes but sometimes placed in their order), had elongated dorsal fins, often associated with an adjacent area of skin which was free of scales. These fins were likely undulated for use in precision swimming. The body morphology of macrosemiids suggests that they were slow swimmers who were capable of maneuvering around complex topography, such as reef environments.
Period = from:-299 till:15 TimeAxis = orientation:horizontal ScaleMajor = unit:year increment:25 start:-299 ScaleMinor = unit:year increment:5 start:-299 TimeAxis = orientation:hor AlignBars = justify
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from: -299 till: -251 color:permian text:[[Permian]]
from: -251 till: -199.6 color:triassic text:[[Triassic]]
from: -199.6 till: -145.5 color:jurassic text:[[Jurassic]]
from: -145.5 till: -65.5 color:cretaceous text:[[Cretaceous]]
from: -65.5 till: -23.03 color:paleogene text:[[Paleogene]]
from: -23.03 till: -2.588 color:neogene text:[[Neog.|Neogene]]
from: -2.588 till: 0 color:quaternary text:[[Q.|Quaternary]]
bar:eratop
from: -299 till: -251 color:paleozoic text:[[Paleozoic Era]]
from: -251 till: -65.5 color:mesozoic text:[[Mesozoic Era]]
from: -65.5 till: 0 color:cenozoic text:[[Cenozoic]]
PlotData=
align:left fontsize:M mark:(line,white) width:5 anchor:till align:left
color:permian bar:NAM1 from:-260 till:-253.8 text:[[Acentrophorus]]
color:permian bar:NAM2 from:-260 till:-199.8 text:[[Paralepidotus]]
color:triassic bar:NAM3 from:-251 till:-245 text:[[Archaeolepidotus]]
color:triassic bar:NAM4 from:-251 till:-245 text:[[Pericentrophus]]
color:triassic bar:NAM5 from:-249.7 till:-237 text:[[Eosemionotus]]
color:triassic bar:NAM6 from:-245 till:-175.6 text:[[Semionotus]]
color:triassic bar:NAM7 from:-245 till:-228 text:[[Alleiolepis]]
color:triassic bar:NAM8 from:-245 till:-228 text:[[Allelepidotus]]
color:triassic bar:NAM9 from:-245 till:-228 text:[[Asialepidotus]]
color:triassic bar:NAM10 from:-245 till:-228 text:[[Enigmatichthys]]
color:triassic bar:NAM11 from:-245 till:-228 text:[[Sinosemionotus]]
color:triassic bar:NAM12 from:-245 till:-199.6 text:[[Serrolepis]]
color:triassic bar:NAM13 from:-228.7 till:-216.5 text:[[Aphelolepis]]
color:triassic bar:NAM14 from:-228.7 till:-216.5 text:[[Orthurus]]
color:triassic bar:NAM15 from:-228.7 till:-65.5 text:[[Lepidotus]]
color:triassic bar:NAM16 from:-228.7 till:-203.6 text:[[Plesiolepidotus]]
color:triassic bar:NAM17 from:-228 till:-199.6 text:[[Corunegenys]]
color:triassic bar:NAM18 from:-228 till:-199.6 text:[[Hemicalypterus]]
color:triassic bar:NAM19 from:-228 till:-199.6 text:[[Pristiosomus]]
color:triassic bar:NAM20 from:-216.5 till:-203.6 text:[[Dandya]]
color:triassic bar:NAM21 from:-216.5 till:-199.6 text:[[Sargodon]]
color:triassic bar:NAM22 from:-216.5 till:-171.6 text:[[Dapedium]]
color:triassic bar:NAM23 from:-203.6 till:-199.6 text:[[Prolepidotus]]
color:jurassic bar:NAM24 from:-199.6 till:-145.5 text:[[Prionopleurus]]
color:jurassic bar:NAM25 from:-183 till:-175.6 text:[[Austrolepidotus]]
color:jurassic bar:NAM26 from:-183 till:-145.5 text:[[Tetragonolepis]]
color:jurassic bar:NAM27 from:-164.7 till:-149.03 text:[[Heterostrophus]]
color:jurassic bar:NAM28 from:-155.7 till:-150.8 text:[[Callopteus]]
color:jurassic bar:NAM29 from:-155.7 till:-150.8 text:[[Oligopleurus]]
color:cretaceous bar:NAM30 from:-112 till:-70.6 text:[[Paralepidosteus]]
color:cretaceous bar:NAM31 from:-99.6 till:-93.5 text:[[Oshunia]]
color:cretaceous bar:NAM32 from:-99.6 till:-93.5 text:[[Sphathiurus]]
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from: -199.6 till: -145.5 color:jurassic text:[[Jurassic]]
from: -145.5 till: -65.5 color:cretaceous text:[[Cretaceous]]
from: -65.5 till: -23.03 color:paleogene text:[[Paleogene]]
from: -23.03 till: -2.588 color:neogene text:[[Neog.|Neogene]]
from: -2.588 till: 0 color:quaternary text:[[Q.|Quaternary]]
bar:era
from: -299 till: -251 color:paleozoic text:[[Paleozoic Era]]
from: -251 till: -65.5 color:mesozoic text:[[Mesozoic Era]]
from: -65.5 till: 0 color:cenozoic text:[[Cenozoic]]
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