This list of fossil fishes described in 2015 is a list of new taxa of jawless vertebrates, placoderms, acanthodians, fossil cartilaginous fishes, bony fishes and other fishes of every kind that have been described during the year 2015, as well as other significant discoveries and events related to paleontology of fishes that occurred in the year 2015. The list only includes taxa at the level of genus or species.

Research A study of the body sizes of Devonian and Carboniferous vertebrates (jawless vertebrates, placoderms, acanthodians, cartilaginous fishes, ray-finned fishes and sarcopterygians, including tetrapods) is published by Sallan & Galimberti (2015), who conclude that following the Hangenberg event the majority of vertebrate lineages experienced persistent reductions in body size for at least 36 million years, and that the few large-bodied survivors of the Hangenberg event failed to diversify, while small-bodied survivors gave rise to all subsequent vertebrate lineages. A study on the skull anatomy of Acanthodes and its implications for inferring the phylogenetic placement of acanthodians is published by Brazeau & de Winter (2015). A study on the fossil specimens considered to be either decomposed or immature specimens of Triazeugacanthus affinis is published by Chevrinais, Cloutier & Sire (2015), who reinterpret the variation initially thought to be caused by various degrees of decomposition as corresponding to ontogenetic changes. A study on the development of saw-teeth in the Cretaceous ray Schizorhiza stromeri is published by Smith et al. (2015). Three large mackerel shark vertebrae, interpreted as belonging to a single individual with a calculated total body length of 6.3 m, are described from the Lower Cretaceous Duck Creek Formation (Texas, United States) by Frederickson, Schaefer & Doucette-Frederickson (2015).

New taxa

Jawless vertebrates Name Novelty Status Authors Age Unit Location Notes ImagesCideriusGen. et sp. novValidVan der BrugghenSilurian (early Wenlock)Fish Bed FormationA member of Euphaneropidae. The type species is Ciderius cooperi.MitraspisGen. et sp. novValidElliott, Schultze & BlieckDevonian (Lochkovian)Drake Bay FormationA pteraspid heterostracan. The type species is Mitraspis cracens.RhegmaspisGen. et sp. novValidGai et al.Devonian (Pragian)Posongchong FormationA gantarostrataspidid huananaspidiform galeaspid. The type species is Rhegmaspis xiphoidea.Siyingia perlatuspinosaSp. novValidSi, Gai & ZhaoDevonian (Lochkovian)Xishancun FormationA polybranchiaspidid galeaspid, a species of Siyingia.Tolypelepis mielnikensisSp. novDisputedDecSilurian (Pridoli)A member of Tolypelepidida, a species of Tolypelepis. Märss (2019) considered it to be a junior synonym of T. undulata.

Placoderms Name Novelty Status Authors Age Unit Location Notes ImagesDriscollaspisGen. et sp. novValidRücklin, Long & TrinajsticLate DevonianA selenosteid arthrodire. The type species is Driscollaspis pankowskiorum.Groenlandaspis potyiSp. novValidOlive, Prestianni & DupretDevonian (late Famennian)A phlyctaeniid arthrodire, a species of Groenlandaspis.Grossilepis rikikiSp. novValidOliveDevonian (late Famennian)A member of Antiarchi, a species of Grossilepis.PauropetalichthysGen. et sp. novValidPan et al.Devonian (late Emsian)A quasipetalichthyid petalichthyid. The type species is Pauropetalichthys magnoculus.Remigolepis durnalensisSp. novValidOliveDevonian (Famennian)A member of Antiarchi, a species of Remigolepis.Turrisaspis strudensisSp. novValidOlive et al.Devonian (late Famennian)A relative of Groenlandaspis, a species of Turrisaspis.

Acanthodians Name Novelty Status Authors Age Unit Location Notes ImagesErymnacanthusGen. et sp. novValidBlais, Hermus & WilsonDevonian (Lochkovian)An ischnacanthid ischnacanthiform. The type species is Erymnacanthus clivus.EuryacanthusGen. et sp. novValidBlais, Hermus & WilsonDevonian (Lochkovian)An ischnacanthid ischnacanthiform. The type species is Euryacanthus rugosus.TricuspicanthusGen. et 2 sp. novValidBlais, Hermus & WilsonDevonian (Lochkovian)An ischnacanthid ischnacanthiform. The type species is Tricuspicanthus gannitus; genus also contains Tricuspicanthus pisciculus.

Cartilaginous fishes Name Novelty Status Authors Age Unit Location Notes ImagesAntarctilamna ultimaSp. novValidGess & CoatesDevonian (Famennian)Witpoort FormationA species of Antarctilamna.Argoubia arnoldmülleriSp. novValidLederOligoceneA mobuline eagle ray, a species of Argoubia.ArnomobulaGen. et sp. novValidLederOligoceneA mobuline eagle ray. The type species is Arnomobula eythrai.Callorhinchus alfordiSp. novValidCicimurri & EbersolePaleocene (Thanetian)Aquia FormationA plough-nose chimaera, a species of Callorhinchus.Callorhinchus phillipsiSp. novValidCicimurri & EbersolePaleocene (Danian)Clayton FormationA plough-nose chimaera, a species of Callorhinchus.Carcharhinus caquetiusSp. novValidCarrillo-Briceño et al.MioceneUrumaco FormationA requiem shark, a species of Carcharhinus.CarcharomodusGen. et comb. novDisputedKriwet, Mewis & HempeMiocene to PlioceneEuropeA member of Lamnidae; a new genus for "Carcharodon" escheri Agassiz, 1843. De Schutter, van der Vliet & Bor (2021) did not consider it to be a genus distinct from Isurus.Cetorhinus piersoniSp. novValidWeltonEarly MioceneAstoria FormationA relative of the basking shark.Cooleyella duffiniSp. novValidIvanov in Ivanov, Nestell & NestellPermian (early Capitanian)Bell Canyon FormationA member of Neoselachii belonging to the family Anachronistidae.Cretalamna catoxodonSp. novValidSiverson et al.Late Cretaceous (middle Cenomanian)An otodontid, a species of Cretalamna.Cretalamna deschutteriSp. novValidSiverson et al.Late Cretaceous (early Turonian)An otodontid, a species of Cretalamna.Cretalamna ewelliSp. novValidSiverson et al.Late Cretaceous (late Coniacian)An otodontid, a species of Cretalamna.Cretalamna gertericorumSp. novValidSiverson et al.Late Cretaceous (early Turonian)An otodontid, a species of Cretalamna.Cretalamna hattini Sp. novValidSiverson et al.Late Cretaceous (early Campanian)An otodontid, a species of Cretalamna.Cretalamna sarcoporthetaSp. novValidSiverson et al.Late Cretaceous (early Campanian)An otodontid, a species of Cretalamna.Diademodus dominicusSp. novValidRoelofs et al.Late DevonianVirgin Hills FormationA phoebodontid elasmobranch, a species of Diademodus.Edaphodon snowhillensisSp. novValidGouiric-Cavalli et al.Late Cretaceous (late Campanian)Snow Hill Island FormationAntarctica (James Ross Island)A chimaera, a species of Edaphodon.GogoselachusGen. et sp. novValidLong et al.Devonian (early Frasnian)Gogo FormationA member of Chondrichthyes of uncertain phylogenetic placement. The type species is Gogoselachus lynbeazelyae.Keasius rhenanusSp. novValidReinecke, von der Hocht & DufraingMiocene (late Burdigalian)Lower Mica Finesand FormationA relative of the basking shark, a species of Keasius.Keasius septemtrionalisSp. novValidReinecke, von der Hocht & DufraingOligocene (early / middle Chattian)Sülstorf BedsA relative of the basking shark, a species of Keasius.KenolamnaGen. et comb. novValidSiverson et al.Late Cretaceous (middle Cenomanian)An otodontid, a new genus for "Cretolamna" gunsoni Siverson (1996).OligorajaGen. et sp. novValidReineckeOligocene (Chattian)Sülstorf BedsA skate. The type species is Oligoraja pristina.ParaptychodusGen. et sp. novValidHammEarly Cretaceous (middle Albian)Duck Creek FormationA member of Ptychodontidae. The type species is Paraptychodus washitaensis.Portalodus mannoliniaeSp. novValidPotvin-Leduc et al.Devonian (Givetian)Plattekill FormationA member of Elasmobranchii, an omalodontid omalodontiform; a species of Portalodus.Pseudaetobatus belliSp. novValidCicimurri & EbersoleEarly Eocene (Ypresian)Hatchetigbee Formation Tallahatta FormationAn eagle ray, a species of Pseudaetobatus.Pseudaetobatus undulatusSp. novValidCicimurri & EbersoleLate Eocene (Priabonian)Dry Branch FormationAn eagle ray, a species of Pseudaetobatus.PseudomegachasmaNom. nov et comb. novValidShimada et al.Late Cretaceous (Cenomanian)Greenhorn Limestone Polpino FormationA putative planktivorous shark, possibly a sand shark; a replacement name for Eorhincodon Nessov (1999) (preoccupied). The type species is "Eorhincodon" casei Nessov (1999); genus also contains "Megachasma" comanchensis Shimada (2007).Raja thiedeiSp. novValidReineckeOligocene (Chattian)Sülstorf BedsA skate, a species of Raja.Scyliorhinus kannenbergiSp. novValidLederOligoceneA catshark, a species of Scyliorhinus.SqualiomicrusGen. et sp. novValidSuzukiMioceneIseyama FormationA member of Dalatiidae. The type species is Squaliomicrus sanadaensis.Thrinacodus dzikiSp. novValidGinter et al.Carboniferous (late Viséan)Holy Cross Mountains Eyam LimestoneA phoebodontid elasmobranch, a species of Thrinacodus.Torpedo chatticaSp. novValidReineckeOligocene (Chattian)Sülstorf BedsA member of Torpedinidae, a species of Torpedo.

Bony fishes