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Macrosemiidae

Macrosemiidae is an extinct family of ginglymodian fish. The family first appeared during the Middle Triassic and disappeared during the Late Cretaceous. The group has been found in rock formations in Africa, Australia, Eurasia and North America. As ginglymodians, their closest living relatives are gars, with them being typically placed as nested within the Semionotiformes. Many members of the family have elongated dorsal fins, often associated with adjacent area of skin which was free of scales. These fins were likely undulated for use in precision swimming. Their body morphology suggests that they were slow swimmers that were capable of maneuvering around complex topography, such as reef environments.

Taxonomy
• †Order Macrosemiiformes • †Family Macrosemiidae, Thiollière, 1858 • Genus †Eosemionotus • Genus †Aphanepygus • Genus †Disticholepis • Genus †Enchelyolepis • Genus †Orthurus • Genus †Petalopteryx • Genus †Neonotagogus • Genus †Histionotus • Genus †Legnonotus • Genus †Macrosemius • Genus †PropterusIncetae sedis • Genus †Uarbryichthys • Genus †Voelklichthys ==Timeline of genera==
Timeline of genera
ImageSize = width:1000px height:auto barincrement:15px PlotArea = left:10px bottom:50px top:10px right:10px Period = from:-251 till:-50 TimeAxis = orientation:horizontal ScaleMajor = unit:year increment:10 start:-251 ScaleMinor = unit:year increment:1 start:-251 TimeAxis = orientation:hor AlignBars = justify Colors = #legends id:CAR value:claret id:ANK value:rgb(0.4,0.3,0.196) id:HER value:teal id:HAD value:green id:OMN value:blue id:black value:black id:white value:white id:mesozoic value:rgb(0.54,0.54,0.258) id:triassic value:rgb(0.51,0.17,0.57) id:earlytriassic value:rgb(0.6,0.22,0.61) id:middletriassic value:rgb(0.73,0.53,0.71) id:latetriassic value:rgb(0.78,0.65,0.8) id:jurassic value:rgb(0.2,0.7,0.79) id:earlyjurassic value:rgb(0,0.69,0.89) id:middlejurassic value:rgb(0.52,0.81,0.91) id:latejurassic value:rgb(0.74,0.89,0.97) id:cretaceous value:rgb(0.5,0.78,0.31) id:earlycretaceous value:rgb(0.63,0.78,0.65) id:latecretaceous value:rgb(0.74,0.82,0.37) BarData= bar:eratop bar:space bar:periodtop bar:space bar:NAM1 bar:NAM2 bar:NAM3 bar:NAM4 bar:NAM5 bar:NAM6 bar:NAM7 bar:NAM8 bar:space bar:period bar:space bar:era PlotData= align:center textcolor:black fontsize:M mark:(line,black) width:25 shift:(7,-4) bar:periodtop from: -251 till: -245 color:earlytriassic text:Early from: -245 till: -228 color:middletriassic text:Middle from: -228 till: -199.6 color:latetriassic text:Late from: -199.6 till: -175.6 color:earlyjurassic text:Early from: -175.6 till: -161.2 color:middlejurassic text:Middle from: -161.2 till: -145.5 color:latejurassic text:Late from: -145.5 till: -99.6 color:earlycretaceous text:Early from: -99.6 till: -65.5 color:latecretaceous text:Late bar:eratop 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 PlotData= align:left fontsize:M mark:(line,white) width:5 anchor:till align:left color:middletriassic bar:NAM1 from: -237 till: -149.03 text: Ophiopsis color:latetriassic bar:NAM2 from: -228.7 till: -199.6 text: Legnonotus color:latejurassic bar:NAM3 from: -155.7 till: -149.03 text: Macrosemius color:latejurassic bar:NAM4 from: -155.7 till: -99.6 text: Histionotus color:latejurassic bar:NAM5 from: -150.8 till: -65.5 text: Propterus color:latejurassic bar:NAM6 from: -150.8 till: -65.5 text: Notagogus color:latejurassic bar:NAM7 from: -147.3 till: -130 text: Enchelyolepis color:earlycretaceous bar:NAM8 from: -145.5 till: -93.5 text: Petalopteryx PlotData= align:center textcolor:black fontsize:M mark:(line,black) width:25 bar:period from: -251 till: -245 color:earlytriassic text:Early from: -245 till: -228 color:middletriassic text:Middle from: -228 till: -199.6 color:latetriassic text:Late from: -199.6 till: -175.6 color:earlyjurassic text:Early from: -175.6 till: -161.2 color:middlejurassic text:Middle from: -161.2 till: -145.5 color:latejurassic text:Late from: -145.5 till: -99.6 color:earlycretaceous text:Early from: -99.6 till: -65.5 color:latecretaceous text:Late bar:era 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 ==References==
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