This list 2019 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 2019, as well as other significant discoveries and events related to molluscan paleontology that would occur in 2019.
General research Description of an assemblage of conchiferan mollusks from the Cambrian Shackleton Limestone (Antarctica) is published by Claybourn et al. (2019). A study on Early Triassic recovery of ammonites and gastropods after the Permian–Triassic extinction event is published by Pietsch et al. (2019). A study on the impact of the Cenomanian-Turonian boundary event and other Cretaceous oceanic anoxic events on generic- and species-level molluscan diversity, extinction rates and ecological turnover is published by Freymueller, Moore & Myers (2019). A juvenile ammonite specimen assigned to the genus Puzosia and four marine gastropods are reported from the Cretaceous Burmese amber of Myanmar by Yu et al. (2019). A study on the timing and nature of recovery of benthic marine ecosystems of Antarctica after the Cretaceous–Paleogene extinction event, as indicated by data from fossils of benthic molluscs, is published by Whittle et al. (2019).
Ammonites
Research
Dimorphic Indonesian ammonite Macrocephalites keeuwensis is reported from the core of Jara Dome (Kutch district, India) by Jain (2019). Description of new fossils of members of the genus Lytohoplites from the Neuquén Basin (Argentina), taxonomic revision of the Lytohoplites species occurring in this basin, and a study on the ontogeny, probable sexual dimorphism and spectrum of intraspecific variability of members of this genus, is published by Vennari & Aguirre-Urreta (2019). A study on the intraspecific variation through the ontogeny of the Late Cretaceous ammonite Scaphites whitfieldi from the Western Interior of the United States is published by Klein & Landman (2019). A lower jaw of Spathites puercoensis is described from the Turonian Carlile Member of the Mancos Shale (New Mexico, United States) by Landman et al. (2019). A study on periodic variations in carbon and oxygen stable isotope profiles from Campanian and Maastrichtian ammonites belonging to the genus Baculites, and on their implications for inferring the life histories of these ammonites, is published by Ellis & Tobin (2019). A study on the hydrostatic properties of the orthoconic morphotype of Baculites compressus and on their implications for the knowledge of the mode of life of this animal is published by Peterman et al. (2019). A study on the ecology and growth of baculitid and scaphitid ammonites from the Maastrichtian Owl Creek Formation (Mississippi, United States), evaluating whether these taxa may have migrated, is published by Ferguson et al. (2019). A study on a sutural anomaly of ammonite specimens known as sutural pseudoinversion is published by Rogov (2019). A study on the systematics of Late Cretaceous ammonites from the southeastern San Juan Basin (Sandoval County, New Mexico) and on the stratigraphic framework of their fossils is published by Sealey & Lucas (2019). A study on the ontogenetic trajectories of septal spacing between succeeding chambers in Hypophylloceras subramosum and Phyllopachyceras ezoense is published online by Iwasaki, Iwasaki & Wani (2019). A study on the intra- and interspecific variation and ontogenetic trajectories of the kossmaticeratid species Maorites densicostatus and Maorites seymourianus is published by Morón-Alfonso (2019). A pathological ammonite specimen characterized by a pronounced left-right asymmetry in both ornamentation and suture lines is described from the Toarcian of southern France by Jattiot et al. (2019). A study on the morphology and function of hook-like structures found in the body chambers of six specimens of Rhaeboceras halli is published online by Kruta et al. (2019).
New taxa Name Novelty Status Authors Age Type locality Country Notes ImagesAlbanesicerasGen. et sp. novValidGaláczMiddle Jurassic (Bathonian)A member of the family Perisphinctidae. The type species is A. damianoi.Albanites americanusSp. novValidBrayard et al.Early Triassic()Allocrioceras irregulareSp. novValidKennedy & KaplanLate Cretaceous (Turonian)Anagaudryceras calabozoiSp. novValidRaffi & Olivero in Raffi, Olivero & MilaneseLate Cretaceous (Campanian)Cerro Toro Formation Rabot Formation Santa Marta FormationAntarctica(James Ross Island)Anagaudryceras sanctuariumSp. novValidRaffi & Olivero in Raffi, Olivero & MilaneseLate Cretaceous (Campanian/Maastrichtian boundary)Snow Hill Island FormationAntarctica(James Ross Island)Anagaudryceras subcompressumSp. novValidRaffi & Olivero in Raffi, Olivero & MilaneseLate Cretaceous (Maastrichtian)Snow Hill Island FormationAntarctica(James Ross Island)AraxoceltitesGen. et 3 sp. novValidKorn, Ghaderi & TabriziPermian (Changhsingian)Genus includes new species A. sanestapanus, A. laterocostatus and A. cristatus.Araxoceras insolensSp. novValidKorn & GhaderiPermian (Wuchiapingian)Araxoceras truncatumSp. novValidKorn & GhaderiPermian (Wuchiapingian)Balearites berryaeSp. novValidVermeulen et al.Early CretaceousBeckerocerasGen. et comb. novValidNaglik, De Baets & KlugDevonian (Emsian)Dzhaus BedsA member of Agoniatitida belonging to the family Mimosphinctidae. The type species is "Erbenoceras" khanakasuensis Yatskov (1990).BeuliaGen. et sp. novValidKorn & PriceDevonian (Famennian)Genus includes new species B. wunderlichi.BorealicerasGen. et comb. novValidVermeulen et al.Early CretaceousGenus includes "Crioceras" stadtlaenderi Müller (1892).CariboucerasGen. et sp. novValidBrayard et al.Early Triassic()Genus includes new species C. slugense.CarpathicerasGen. et comb. et sp. novValidMeister & SchlöglEarly Jurassic (Sinemurian)A member of Asteroceratinae. The type species is "Coroniceras (Paracoroniceras)" bordoti Guérin-Franiatte (1966); genus also includes new species C. misiki.Carthaginites multituberculatusSp. novValidKennedy in Gale, Kennedy & WalaszczykLate Cretaceous (Cenomanian)Cauvery BasinA member of the family Turrilitidae.Chieseiceras dolomiticumSp. novValidBrack & RieberMiddle Triassic (Late Anisian)ChtelnicacerasGen. et sp. novValidMeister & SchlöglEarly Jurassic (Sinemurian)An ammonite with an intermediate morphology between Arietitidae and Oxynoticeratidae. Genus includes new species C. janus.Damesites africanusSp. novValidKennedy & LobitzerLate Cretaceous (Cenomanian)Odukpani FormationA member of the family Desmoceratidae.Docidoceras higginsiSp. novValidChandlerMiddle Jurassic (Bajocian)Dzhaprakoceras brodheadenseSp. novValidWork & MasonCarboniferous (Tournaisian)Borden Formation()Eogunnarites? elegansSp. novValidKennedy in Gale, Kennedy & WalaszczykLate Cretaceous (Cenomanian)Cauvery BasinA member of the family Kossmaticeratidae.Epophioceras nodosusSp. novValidMeister & SchlöglEarly Jurassic (Sinemurian)Euomphaloceras varicostatumSp. novValidKennedy in Gale, Kennedy & WalaszczykLate Cretaceous (Cenomanian)Cauvery BasinFalciclymenia cabrierensisSp. novValidKorn & PriceLate DevonianFiniclymenia czarnockiiSp. novValidKorn & PriceDevonian (Famennian)Central EuropeA gonioclymeniid ammonite.Finiclymenia langeiSp. novValidKorn & PriceDevonian (Famennian)Central EuropeA gonioclymeniid ammonite.Flickia bullataSp. novValidKennedy & LobitzerLate Cretaceous (Cenomanian)Odukpani FormationFollotites bighillensisSp. novValidWork & MasonCarboniferous (Tournaisian)Borden Formation()Gaudryceras submurdochiSp. novValidRaffi & Olivero in Raffi, Olivero & MilaneseLate Cretaceous (Campanian)Rabot Formation Santa Marta FormationAntarctica(James Ross Island)Glaphyrites taimyricusSp. novValidKonovalova & Borissenkov in Borissenkov, Konovalova & KutyginCarboniferousMakarovskaya Formation()GlaucocerasGen. et comb. novValidMatamales-Andreu et al.Early Cretaceous (Hauterivian)A new genus for "Baculites" renevieri Ooster (1860).Glyptoxoceras (?) tenuicostatumSp. novValidKennedy & KaplanLate Cretaceous (Turonian)A member of the family Diplomoceratidae.HoeveliaGen. et sp. novValidKorn & PriceDevonian (Famennian)Genus includes new species H. schindewolfi.Homoeoplanulites todaginensisSp. novValidPoulton & HallMiddle Jurassic (Callovian)()Hoploscaphites macerSp. novValidLandman et al.Late Cretaceous (Maastrichtian)Bearpaw Shale Pierre Shale()Ivoites meshchankinaeSp. novValidNaglik, De Baets & KlugDevonian (Emsian)A member of Agoniatitida belonging to the family Mimosphinctidae.Kamerunoceras multinodosumSp. novValidKennedy in Gale, Kennedy & WalaszczykLate Cretaceous (Turonian)Karai FormationKayutoceras pogrebitskyiSp. novValidBorissenkov & Kutygin in Borissenkov, Konovalova & KutyginCarboniferousOlen'ynskaya Formation()Kirsoceras arteseptatumSp. novValidBockwinkel, Korn & HerdDevonian (Famennian)Kirsoceras gelamenumSp. novValidBockwinkel, Korn & HerdDevonian (Famennian)KitabobactritesGen. et sp. novValidNaglik, De Baets & KlugDevonian (Emsian)A member of Bactritida belonging to the family Bactritidae. The type species is K. salimovae.KumetacerasGen. et sp. novValidGaláczMiddle Jurassic (Bathonian)A possible member of the family Spiroceratidae. The type species is K. enigmaticum.KunnamicerasGen. et comb. novValidKennedy in Gale, Kennedy & WalaszczykLate Cretaceous (Cenomanian)Cauvery BasinA member of the subfamily Acanthoceratinae. The type species is "Ammonites" tropicus Stoliczka (1865); genus also includes "Protacanthoceras" imperatoris Wright & Kennedy (1980).Latiwitchellia atacamensisSp. novValidDietze & von HillebrandtMiddle Triassic (Bajocian)Lissoceras maerteniSp. novValidPavia & Fernandez-LopezMiddle Jurassic (Bajocian)A member of Haploceratoidea belonging to the family Lissoceratidae.Lissoceras maizetenseSp. novValidPavia & Fernandez-LopezMiddle Jurassic (Bajocian)A member of Haploceratoidea belonging to the family Lissoceratidae.Lissoceras ovaleSp. novValidPavia & Fernandez-LopezMiddle Jurassic (Bajocian)El Pedregal FormationA member of Haploceratoidea belonging to the family Lissoceratidae.Lissoceras sturaniiSp. novValidPavia & Fernandez-LopezMiddle Jurassic (Bajocian)()A member of Haploceratoidea belonging to the family Lissoceratidae.Lissoceras submediterraneumSp. novValidPavia & Fernandez-LopezMiddle Jurassic (Bajocian)El Pedregal FormationA member of Haploceratoidea belonging to the family Lissoceratidae.Loyezia robertiSp. novValidVermeulen et al.Early Cretaceous (Hauterivian)A member of the family Crioceratitidae.Maeneceras tabasenseSp. novValidKorn et al.Probably late early FamennianA member of the family Sporadoceratidae.Medioclymenia mediaSp. novValidKorn & PriceDevonian (Famennian)Central EuropeA gonioclymeniid ammonite.MegatirolitesGen. et comb. novValidBalini et al.Early Triassic (Olenekian)Sefid-Kuh Limestone