This list 2020 in paleomalacology is a list of new taxa of ammonites and other fossil cephalopods, as well as fossil gastropods, bivalves and other molluscs that were described during the year 2020, as well as other significant discoveries and events related to molluscan paleontology that occurred in 2020.
Ammonites
New taxa Name Novelty Status Authors Age Type locality Country Notes ImagesAcrimeroceras hoppeckenseSp. novValidKorn & Buchwald in Korn et al.Late DevonianAcrimeroceras ropicenseSp. novValidKorn, Bartzsch & Weyer in Korn et al.Late DevonianAcrimeroceras saalenseSp. novValidKorn, Bartzsch & Weyer in Korn et al.Late Devonian Acutimitoceras alabasense Sp. nov Valid Nikolaeva Devonian-Carboniferous boundary Acutimitoceras dzhanganense Sp. nov Valid Nikolaeva Devonian-Carboniferous boundary Almites hayasakai Sp. nov Valid Ehiro & Ozawa Permian (Asselian) Taishaku Limestone Angolaites elegans Sp. nov Valid Kennedy in Gale & Kennedy Early Cretaceous (Albian) Lower Duck Creek () A member of the family Brancoceratidae.Aspidoceras schweigertenseSp. novValidSartiLate Jurassic (Tithonian)Rosso Ammonitico Veronese FormationAulacostephanus camericensisSp. novValidCope & EtchesLate Jurassic (Kimmeridgian)Baidites obesusSp. novValidJattiot, Bucher & BrayardEarly Triassic Boesites biconcavus Sp. nov Valid Ehiro & Ozawa Permian (Asselian) Taishaku Limestone Borissjakoceras falcatumSp. novValidKennedyLate Cretaceous (Cenomanian)A member of the family Binneyitidae. ?Bouleiceras betetensis Sp. nov Valid Martínez & Joral Early Jurassic (Toarcian) A member of the family Hildoceratidae. Bouleiceras ibericum Sp. nov Valid Martínez & Joral Early Jurassic (Toarcian) A member of the family Hildoceratidae. Cagliceras baldii Sp. nov Valid Kovács, Dunai & Evanics Early Jurassic (Toarcian) A member of the family Erycitidae. Cagliceras wegeneri Sp. nov Valid Kovács, Dunai & Evanics Early Jurassic (Toarcian) A member of the family Erycitidae.Carthaginites elegansSp. novValidKennedyLate Cretaceous (Cenomanian)A member of the family Turrilitidae.Churkites wareiSp. novValidJattiot, Bucher & BrayardEarly TriassicCollignoniceras badilletiSp. novValidAmédro & Châtelier in Amédro et al.Late Cretaceous (Turonian)Collignoniceras hourqueigiSp. novValidAmédro & Châtelier in Amédro et al.Late Cretaceous (Turonian)Collignoniceras vigennumSp. novValidAmédro & Châtelier in Amédro et al.Late Cretaceous (Turonian)Conlinites evolutumSp. novValidKennedyEarly Cretaceous (Albian)A member of the family Brancoceratidae.CoquandicerasGen. et comb. novValidKennedyLate Cretaceous (Cenomanian)A member of the family Acanthoceratidae belonging to the subfamily Mantelliceratinae. The type species is "Ammonites" jubae Coquand (1880); genus also includes "Ammonites" villei Coquand (1862).CryptoturrilitesGen. et sp. novValidKennedyLate Cretaceous (Cenomanian)A member of the family Turrilitidae. The type species is C. tenuicostatus. Elobiceras (Craginites) simplex Sp. nov Valid Kennedy in Gale & Kennedy Early Cretaceous (Albian) Lower Duck Creek () A member of the family Brancoceratidae. Elobiceras (Craginites) sparcicostatum Sp. nov Valid Kennedy in Gale & Kennedy Early Cretaceous (Albian) Lower Duck Creek () A member of the family Brancoceratidae.Flemingites lidakensisSp. novValidJattiot, Bucher & BrayardEarly TriassicGoniatites abaiensisSp. novValidKorn et al.Carboniferous (Viséan)Baktysai FormationGoniatites zhankurganensisSp. novValidKorn et al.Carboniferous (Viséan)Baktysai FormationGraysonites elegansSp. novValidKennedyLate Cretaceous (Cenomanian)A member of the family Acanthoceratidae.Gregoryceras borealeSp. novValidMitta & StupachenkoLate Jurassic (Oxfordian)A member of the family Aspidoceratidae.Hoevelia megalomanicaSp. novValidKorn, Hairapetian & GholamalianLate DevonianHomeomorphitesGen. et sp. et comb. novValidBert, Bersac & CanutEarly Cretaceous (Hauterivian to Barremian)A member of the family Neocomitidae. The type species is H. aguirreurretae; genus also includes H. ploszkiewiczi (Riccardi and Aguirre-Urreta, 1989) and H. varicostatus (Riccardi and Aguirre-Urreta, 1989). Announced in 2019; the final version of the article naming was published in 2020.Homoceratoides wangchengiSp. novValidKorn & Wang in Korn et al.Carboniferous (Bashkirian)Jingyuan FormationA member of the family Bisatoceratidae. Announced in 2020; the final version of the article naming was published in 2021.Hoploscaphites peterseniSp. novValidLandman et al.Late CretaceousBearpaw ShalePierre Shale()HowarthicerasGen. et comb. novValidZakharov & RogovUpper Jurassic (Tithonian)()A new genus for "Groebericeras" baylei Imlay & Jones.Hybonoticeras pseudoharpephorumSp. novValidSartiLate Jurassic (Tithonian)Rosso Ammonitico Veronese FormationHypowaageniaGen. et sp. novValidSchweigert & SchlamppLate Jurassic (Kimmeridgian)Arzberg Formation?A member of the family Aspidoceratidae. The type species is H. endressi; genus might also include "Aspidoceras" acanthomphalum Zittel (1870).Kosmoclymenia ebbighauseniSp. novValidKornDevonian (Famennian) Lasswitzia Gen. et comb. nov Valid Kennedy in Gale & Kennedy Early Cretaceous (Albian) Lower Duck Creek Formation () A member of the family Brancoceratidae. The type species is "Schloenbachia austinensis" Roemer var. minima Lasswitz (1904) (raised to the rank of a separate species Lasswitzia minima).LenicostitesGen. et comb. novValidBert, Bersac & CanutEarly Cretaceous (Barremian)A member of Ancyloceratoidea belonging to the new family Lenicostitidae. The type species is "Hemihoplites" rusticus Vermeulen (1996). Announced in 2019; the final version of the article naming was published in 2020.Lithacoceras főzyiSp. novValidSartiLate Jurassic (Tithonian)Rosso Ammonitico Veronese FormationLitophragmatoceras curiosusSp. novValidKennedyLate Cretaceous (Cenomanian)A member of the family Flickiidae.Lytoceras pseudorsiniiSp. novValidSartiLate Jurassic (Tithonian)Rosso Ammonitico Veronese Formation Marcouxia chaiburiensis Sp. nov Valid Tongtherm et al. Early Triassic Chaiburi Margoceras Gen. et sp. nov Valid Borissenkov Permian (Cisuralian) () A member of the family Paragastrioceratidae. Genus includes new species M. boreale. Mittaites Gen. et comb. nov Valid Frau et al. Early Cretaceous (Berriasian) The type species is "Mazenoticeras" ceccai. Announced in 2020; the final version of the article naming it was published in 2021. Mortoniceratoides elegans Sp. nov Valid Kennedy in Gale & Kennedy Early Cretaceous (Albian) Kiamichi () A member of the family Brancoceratidae.Muessenbiaergia bockwinkeliSp. novValidKornDevonian (Famennian)A member of the family Kosmoclymeniidae.Neophlycticeras algerienseSp. novValidKennedyLate Cretaceous (Cenomanian)A member of the family Lyelliceratidae. Neophyllites lavernockensis Sp. nov Valid Hodges Early Jurassic (Hettangian) White Lias Formation Announced in 2020; the final version of the article naming it was published in 2021.NeotelodactylitesGen. et comb. novValidJattiot, Gris & TrincalEarly Jurassic (Toarcian)A new genus for "Peronoceras" eucosmum Lippi Boncambi (1947).Neouddenites echiensisSp. novValidKutyginPermian()A member of the family Medlicottiidae. Paracraginites Gen. et sp. nov Valid Kennedy in Gale & Kennedy Early Cretaceous (Albian) Lower Duck Creek () A member of the family Brancoceratidae. The type species is P. conlini.Paracrioceras giraudaeSp. novValidVermeulen et al.Early CretaceousParagastrioceras cantabrignianumSp. novValidBorissenkovPermian (Cisuralian)()A member of the family Paragastrioceratidae.Paraspidites bicarinatusSp. novValidJattiot, Bucher & BrayardEarly TriassicParatornoceras ayenseSp. novValidKorn & Buchwald in Korn et al.Late DevonianParatornoceras harounenseSp. novValidKorn & Ebbighausen in Korn et al.Late DevonianParatornoceras peterseniSp. novValidKorn & Buchwald in Korn et al.Late DevonianParatornoceras thuringenseSp. novValidKorn, Bartzsch & Weyer in Korn et al.Late DevonianPernaceras leroyiSp. novValidVermeulen et al.Early Cretaceous Pervinquieria (Deiradoceras) serpentiforme Sp. nov Valid Kennedy in Gale & Kennedy Early Cretaceous (Albian) Lower Duck Creek () A member of the family Brancoceratidae. Pervinquieria (Pervinquieria) asper Sp. nov Valid Kennedy in Gale & Kennedy Early Cretaceous (Albian) Lower Duck Creek () A member of the family Brancoceratidae.ProcrioceratitesGen. et sp. et comb. novValidVermeulen et al.Early CretaceousA member of the family Crioceratitidae. The type species is P. etiennei; genus also includes P. primitivus (Reboulet, 1996) and P. barrabei (Sarkar, 1955).Protacanthoceras sottaraenseSp. novValidKennedyLate Cretaceous (Cenomanian)A member of the family Acanthoceratidae.Protacanthodiscus guerraiSp. novValidSartiLate Jurassic (Tithonian)Rosso Ammonitico Veronese FormationProuddenites evolutusSp. novValidKutyginPermian()A member of the family Medlicottiidae.Pseudodiscosphinctes pseudorhodanicusSp. novValidCaracuel & Sarti in SartiLate Jurassic (Tithonian)Rosso Ammonitico Veronese FormationPseudolissoceras atesinumSp. novValidSartiLate Jurassic (Tithonian)Rosso Ammonitico Veronese FormationPseudolongaevicerasGen. et sp. novValidAlifirov & KnyazevMiddle Jurassic (Callovian)A member of the family Cardioceratidae. Genus includes new species P. densicostatum.Pseudoxybeloceras simplexSp. novValidKennedyLate CretaceousPtychites embreeiSp. novValidBischof & LehmannMiddle Triassic (Anisian)Favret Formation()Reymenticoceras ornatumSp. novValidKennedyLate Cretaceous (Turonian)A member of the family Acanthoceratidae belonging to the subfamily Mammitinae. Announced in 2020; the final version of the article naming it was published in 2021.Romaniceras (Romaniceras) marigniacumSp. novValidAmédro & Châtelier in Amédro et al.Late Cretaceous (Turonian)RoopnarinitesGen. et comb. novValidJattiot, Bucher & BrayardEarly TriassicGenus includes "Meekoceras" paucesculptatum Welter (1922).Scaphites occlususSp. novValidKennedyLate Cretaceous (Cenomanian)A member of the family Scaphitidae.Schaireria (Schaireria) veteraSp. novValidSartiLate Jurassic (Tithonian)Rosso Ammonitico Veronese Formation Shumardites umbilicatus Sp. nov Valid Ehiro & Ozawa Permian (Asselian) Taishaku Limestone Sormaites Gen. et sp. nov Valid Muramiya & Shigeta Late Cretaceous (Turonian) A member of the family Diplomoceratidae. Genus includes new species S. teshioensis.Stoliczkaia (Stoliczkaia) djerissaensisSp. novValidKennedyEarly Cretaceous (Albian)A member of the family Lyelliceratidae.Subflemingites bihatienseSp. novValidJattiot, Bucher & BrayardEarly TriassicTeschenicerasGen. et comb. novValidVašíčekEarly Cretaceous (Valanginian to Hauterivian)A member of the family Neocomitidae. The type species is "Neocomites (Teschenites)" flucticulus Thieuloy (1977); genus also includes "Neocomites (Teschenites)" callidiscus Thieuloy (1971), "Teschenites" subflucticulus Reboulet (1996), "Neocomites (Teschenites)" pachydicranus Thieuloy (1977) and "Teschenites" subpachydicranus Reboulet (1996).Tumaroceras paveliSp. novValidBorissenkovPermian (Cisuralian)()A member of the family Paragastrioceratidae. Vidrioceras ellipticum Sp. nov Valid Ehiro & Ozawa Permian (Asselian) Taishaku Limestone Virgatosimoceras propecostatumSp. novValidSartiLate Jurassic (Tithonian)Rosso Ammonitico Veronese Formation Yezoceras elegans Sp. nov Valid Aiba, Karasawa & Iwasaki Late Cretaceous (Coniacian) A member of the family Nostoceratidae.
General research A study aiming to determine the drag force experienced by a wide range of ammonite shell shapes is published by Hebdon, Ritterbush & Choi (2020). A study evaluating how different parameters affected the ammonite shell's response to water pressure, aiming to determine whether the ammonite septa strengthened the shell against pressure at increasing water depths, is published by Lemanis (2020).