2024 in paleomalacology

This list of fossil molluscs described in 2024 is a list of new taxa of fossil molluscs that were described during the year 2024, as well as other significant discoveries and events related to molluscan paleontology that occurred in 2024.

Ammonite research

 * A study on the affinities of "Tornoceras" baldisi, based on data from new specimens from the Chigua Formation (Argentina), is published by Allaire et al. (2024), who transfer this species to the genus Epitornoceras, and interpret the uppermost levels of the Chavela Member of the Chigua Formation preserving its fossils as Givetian in age.
 * Mironenko & Smurova (2024) describe ammonite specimens from the Jurassic localities in Russia preserved with the three-dimensional cameral membranes in their phragmocones which differed in their spatial arrangement and complexity from those known in other ammonites, and study the formation of all types of ammonite cameral sheets.
 * The earliest occurrence of genus Macrocephalites known to date is reported from the Bathonian Kachchh Basin (India) by Jain (2024).
 * Description of Late Jurassic ammonites from the Spiti Shale Formation of the Spiti and Zanskar regions of the Himalayas (India) is published by Bhosale et al. (2024).
 * A study on changes of conch shape and septal spacing between successive chambers in Cretaceous ammonites from India, Madagascar and Japan throughout their ontogeny, interpreted as indicative of closer phylogenetic relationships between Perisphinctina and Ancyloceratina than with Lytoceratina or Phylloceratina, is published by Nishino et al. (2024).
 * A study on the morphological variation of specimens of Placenticeras from the Upper Cretaceous strata of the eastern Gulf Coastal Plain (mostly from Alabama, United States) is published by Mohr, Tobin & Tompkins (2024), who interpret the studied sample as including either a single species or two successive species, find no support for the recognition of Placenticeras and Stantonoceras as distinct genera, and report likely evidence of sexual dimorphism.
 * A study on the diversification dynamics of Late Cretaceous ammonites is published by Flannery-Sutherland et al. (2024), who find evidence of regional differences of diversity trends, but no evidence of a progressive global decline through the Late Cretaceous.

Other cephalopod research

 * New estimates for the body size of Megateuthis, including estimates of full body length of up to 2.17 m in M. suevica and possibly up to 3.11 m in M. elliptica, are presented by Klug et al. (2024).
 * A study on calcite from Early Cretaceous belemnite rostra from the Mahajanga Basin (Madagascar), providing evidence of the Valanginian cooling event in the Southern Hemisphere, is published by Wang et al. (2024).
 * Fossil material of Paraplesioteuthis sagittata and ?Loligosepia sp. indet. from the Toarcian strata of the Causses Basin (France), providing evidence of previously unrecognized diversity of gladius-bearing coleoids in the studied basin, is described by Jattiot et al. (2024), who argue that P. sagittata might have originated in the Mediterranean domain.
 * Serafini et al. (2024) describe nautiloid jaw elements associated with marine reptile carcasses from the strata of the Rosso Ammonitico Veronese (Italy) ranging from the Bajocian to the Kimmeridgian, interpreted as the first unambiguous evidence of nautiloids scavenging Mesozoic marine reptile remains, as well as multiple belemnite specimens associated with the holotype of Neptunidraco ammoniticus, interpreted as likely evidence of mass mortality after spawning.
 * Mironenko et al. (2024) describe an assemblage of cephalopod jaws from the upper Cenomanian–middle Turonian strata in Krasnoyarsk Krai (Russia), interpreted as remains of large-bodied ammonites and octobrachian coleoids.

Bivalve research

 * Evidence indicative of different dynamics of the rates of origination and net diversification in infaunal and epifaunal bivalves throughout the Phanerozoic is presented by Foote, Edie & Jablonski (2024).
 * A study on the recovery of bivalves in the aftermath of the Permian–Triassic extinction event, providing evidence of an increase in endemicity beginning in the Middle Triassic, is published by Echevarría & Ros-Franch (2024).
 * Moneer et al. (2024) revise Campanian Tethyan oysters from the North Eastern Desert of Egypt, who interpret the studied fossils as indicative of the primary migration pattern of oysters from the Southern Tethys margin towards the East–West direction, as well as indicative of a transition towards deeper environments during the middle-late Campanian.
 * Pérez & Berezovsky (2024) study the phylogenetic affinities of Malarossia from the Eocene of Ukraine, recovering it as an early diverging genus within the carditid subfamily Scalaricarditinae.
 * A study on the evolutionary history of Mediterranean bivalves across the Zanclean-Calabrian interval, providing evidence of less intense and more gradual loss of biodiversity than previously estimated and of more severe loss of biodiversity suspension feeders compared to infaunal deposit feeders, is published by Mondanaro, Dominici & Danise (2024).

Gastropod research

 * Sun et al. (2024) describe fossils of large-bodied members of the genus Toxoconcha from the Middle Triassic Qingyan biota (Guizhou, China), estimating the largest specimen to have original height of around 350 mm.
 * Evidence of preservation of intact polyene pigments in gastropod shells from the Miocene Vienna Basin (Austria and Hungary) is presented by Wolkenstein, Schmidt & Harzhauser (2024).
 * A study on the diversity of Miocene gastropods from the Central Paratethys, providing evidence of a Middle Miocene species richness hotspot resulting from the formation of an archipelago-like landscape and the Middle Miocene Climatic Optimum, as well as evidence of subsequent decline in biodiversity related to the Middle Miocene disruption, is published by Harzhauser et al. (2024).
 * Tattersfield et al. (2024) study the ecological associations of extant terrestrial gastropods from the Laetoli-Endulen area (Tanzania) and compare them with Pliocene gastropod assemblages from Laetoli, interpreting gastropods from the Lower Laetolil beds as indicative of semi-arid environment, those from the Upper Laetolil Beds as indicative of a mosaic of forest, woodland and bushland habitats, and gastropods from the Upper Ndolanya Beds as indicative of humid environment.
 * Evidence of coordinated response of endemic Microcolpia and Theodoxus prevostianus from Lake Pețea (Romania) to Late Glacial and Holocene climate changes resulting in lake level changes, thermal water pulses and changes of availability of calcium and magnesium in shell construction is presented by Gulyás & Sümegi (2024).

General research

 * Antoine et al. (2024) report the discovery of fossil material from Kourou (French Guiana) providing evidence of the presence of diverse foraminifer, plant and animal communities near the equator in the 130,000-115,000 years ago time interval, including evidence of the presence of a diverse mollusc assemblage indicative of stronger affinities between Guianas and the Caribbean than today.