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2024 in arthropod paleontology
Overview of the events of 2024 in arthropod paleontology From Wikipedia, the free encyclopedia
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2024 in arthropod paleontology is a list of new arthropod fossil taxa, including arachnids, crustaceans, trilobites, and other arthropods (except insects, which have their own list) that were announced or described, as well as other significant arthropod paleontological discoveries and events which occurred in 2024.
Chelicerates
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Arachnids
Araneae
Araneological research
- Córdova-Tabares et al. (2024) describe a sac spider specimen from the Mexican amber preserved with an ant belonging to the genus Azteca, providing evidence of a fossil spider showing trapping and feeding behavior seen also in its extant relatives.[9]
Ixodida
Opiliones
Opiliones research
- Gainett et al. (2024) report that extant daddy longlegs have six eyes, including four vestigial ones, and reevaluate the affinities of fossil members of Opiliones with four eyes, resulting in older estimated ages of harvestman diversification.[12]
Pseudoscorpiones
Sarcoptiformes
Schizomida
Schizomid research
- A study on changes of body size and shape diversity of male flagella in Schizomida throughout their evolutionary history is published by Belojević et al. (2024).[18]
Scorpiones
Scorpion research
- Review of the higher classification of fossil scorpions is published by Dunlop & Garwood (2024) .[26]
- Lourenço & Velten (2024) report the discovery of pro-juvenile specimens of Betaburmesebuthus kobberti trapped together in a piece of Burmese amber, and interpret this finding as possible evidence that Cretaceous palaeoburmesebuthid scorpions produced litters with reduced number of offspring but including large pro-juveniles.[27]
Trombidiformes
Trombidiform research
- Larvae of mites belonging to the group Erythraeoidea parasitising gall midges (providing evidence of an association unknown in extant fauna) are reported from the Cretaceous amber from Myanmar by Arce et al. (2024), who interpret this finding as indicative of shift of the host range of the studied mites after the Cretaceous.[30]
Uropygi
Other arachnids
Other arachnid research
- A study on the mouthparts of members of the genus Palaeocharinus from the Rhynie chert (United Kingdom), providing evidence of the presence of a sophisticated mechanism for liquid feeding comparable to the filtration mechanisms of extant arachnids, is published by Long et al. (2024).[33]
- A study on the structure of cuticles of Palaeocharinus, providing evidence of possible adaptations to terrestrial life, is published by Long et al. (2024).[34]
Eurypterids
Eurypterid research
- A study on the evolution of eurypterid body size is published by Ruebenstahl et al. (2024), who find that giant size evolved independently in different eurypterid lineages, without clear relation to habitat or environmental drivers.[36]
- Bicknell et al. (2024) describe new fossil material of Silurian and Devonian eurypterids from the Wallace Shale and Merrimerriwa Formation (Australia), extending known geographical range of Jaekelopterus into Gondwana.[37]
- A diverse assemblage of eurypterid remains, including isolated setae and cuticular sheets with attached setae, is described from the Devonian Ora Formation (Iraq) by Makled et al. (2024).[38]
- Braddy (2024) studies the life mode of carcinosomatoid eurypterids, interpreting them as slow-swimming ambush predators and mud grubbers, and interprets megalograptids as likely more basal than carcinosomatids and mixopterids.[39]
- Bicknell, Gaines & Hopkins (2024) describe a carcinosomatid specimen from the Ordovician strata from the Beecher's Trilobite Bed (New York, United States) preserving the first evidence for mesosomal musculature in eurypterids, and providing evidence that eurypterid musculature can be preserved in pyrite.[40]
- Poschmann & Tollerton (2024) describe a new specimen of Eysyslopterus patteni from the Silurian Rootsiküla/Saaremaa Lagerstätte (Estonia), providing information on the morphology of the metastoma of the studied eurypterid.[41]
- Description of genital appendages of Acutiramus macrophthalmus is published by Cheng & Briggs (2024).[42]
Xiphosurans
Xiphosuran research
- A specimen of Tachypleus syriacus preserved with intestinal contents transitioning into a coprolite is described from the Cenomanian Hjoula Lagerstätte (Lebanon) by Bicknell et al. (2024).[43]
Other chelicerates
Other chelicerate research
- Lustri et al. (2024) describe new fossil material of Bunaia woodwardi from the Silurian (Přídolí) Williamsville Formation of the Bertie Group (Ontario, Canada), and interpret B. woodwardi as a member of the family Offacolidae.[46]
- Revision of the taxonomy, morphology and stratigraphical distribution of members of the genus Limuloides is published by Howard (2024).[47]
- Sabroux et al. (2024) revise the fossil material of Devonian sea spiders from the Hunsrück Slate (Germany), providing new information on their anatomy and affinities, and find no compelling evidence of Pantopoda in the Devonian.[48]
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Crustaceans
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Malacostracans
Malacostracan research
- A study on the hydrodynamic performance of carapaces of caryocaridid archaeostracans, providing evidence that the carapace shapes facilitated the pelagic mode of life of caryocaridids, is published by Pates & Xue (2024).[79]
- A study on carapaces of specimens of the caryocaridid species Soomicaris cedarbergensis from the Ordovician Xinertai Formation (China), providing probable evidence of adaptations to the pelagic lifestyle, is published by Liu et al. (2024).[80]
- Bicknell et al. (2024) describe fossil material of mantis shrimps belonging to the group Archaeostomatopodea and possibly to the genus Tyrannophontes fom the Carboniferous Wea Shale Member of the Cherryvale Shale (Nebraska, United States), preserving the oldest evidence of the presence of biramous gilled appendages in mantis shrimps reported to date.[81]
- Redescription of Kellnerius jamacaruensis is published by Barros, Oliveira & Saraiva (2024), who reaffirm the inclusion of this shrimp within the family Palaemonidae.[82]
- Charbonnier et al. (2024) present the first reconstruction of the internal anatomy of Eryma ventrosum, based on data from a well-preserved female and male specimens from the La Voulte-sur-Rhône Lagerstätte (France).[83]
- Purported crushing teeth of teleosts or Lepidotes from the Upper Cretaceous Allen, Los Alamitos, La Colonia, Loncoche and Chorrillo formations (Argentina) are reinterpreted as bio-gastroliths (temporary structures within the lateral walls of the stomach, serving as reservoirs of calcium carbonate before molting) of members of Astacidea by Panzeri et al. (2024).[84]
- Luque et al. (2024) provide fossil node calibration points for the studies of the phylogenetic relationships of crabs, and reassess the earliest occurrences of members of several crab groups.[85]
- Redescription of "Dromiopsis" oscari is published by LaBonte, Schweitzer & Feldmann (2024) who transfer this crab from the family Dynomenidae to the family Goniodromitidae and to the genus Sabellidromites.[86]
- A study on the diversity and distribution of crabs belonging to the group Homoloida throughout their evolutionary history is published by Shaffer & Schweitzer (2024).[87]
Ostracods
Ostracod research
- A study on pores and associated canals in extant and Triassic ornate bairdiids, providing new morphological data interpret as supporting the interpretation of the Triassic genera Mirabairdia and Nodobairdia as distinct from the extant genus Triebelina, is published by Forel et al. (2024).[102]
- Taxonomic revision of ostracods from the Lower Cretaceous Codó Formation (Brazil) is published by Coimbra & Petró (2024).[103]
- A study on changes of the diversity of ostracods from the Indo-Australian Archipelago region throughout the Cenozoic, aiming to determine factors responsible for recorded changes, is published by Tian et al. (2024), who argue that the studied region became the richest marine biodiversity hotspot mostly as a result of immunity to major extinction events during the Cenozoic, shift towards colder climate and the increase in habitat size (shelf area).[104]
Thecostracans
Other crustaceans
Other crustacean research
- Alarcón et al. (2024) report the discovery of new clam shrimp assemblages from the Upper Triassic (Norian) Bocas and Montebel formations (Colombia), providing evidence of a similar composition of Norian clamp shrimp assemblages from northwestern Gondwana and rift basins of central Pangea (but different from those from southern Gondwana).[112]
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Insects
Radiodonts
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Trilobites
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Trilobite research
- Drage (2024) finds evidence of only minor differences in morphometry between trilobites displaying different modes of moulting.[133]
- Trilobite fossil material from the Tiout section in Morocco, representing the first occurrence of trilobites in West Gondwana and some of the oldest trilobite fossils in general, is determined to be approximately 519.62-million-years-old by Sinnesael, Millard & Smith (2024).[134]
- El Albani et al. (2024) report the discovery of exceptionally preserved trilobite specimens from the Cambrian Tatelt Formation (Morocco) fossilized through rapid ash burial caused by underwater pyroclastic flow, providing new information on the trilobite anatomy.[135]
- A study on the growth and development of Sahtuia carcajouensis and Mackenzieaspis parallelispinosa from the Cambrian Mount Cap Formation (Canada) is published by Handkamer & Pratt (2024), who report evidence of decrease in the number of episodes of segment release in both taxa, possibly as a result of local environmental conditions.[136]
- Singla et al. (2024) demarcate the stratigraphic thickness of the Oryctocephalus salteri biozone in the Cambrian (Wuliuan) Parahio Member of the Kunzam La Formation in the Spiti region, preserving diverse trilobite fossils, and correlate the O. salteri biozone of the Kunzam La Formation with the Tonkinella-Hundwarella bearing level of the Nutunus Formation in the Kashmir region.[137]
- Evidence interpreted as indicative of a direct link between the spread of low-oxygen conditions in shallow-water settings and the turnover of trilobites from the North China Platform during the Steptoean positive carbon isotope excursion is presented by Yang et al. (2024).[138]
- A study on the affinities of harpetid and trinucleioid trilobites is published by Beech, Bottjer & Smith (2024), who argue that the body plan with a wide, flattened cephalic brim or fringe evolved independently in the two groups, and interpret trinucleids as likely specialized asaphids.[139]
- Evidence from the study of soft-bodied specimens of Olenoides serratus and Triarthrus eatoni, interpreted as indicating that trilobites had five pairs of cephalic appendages, is presented by Hou & Hopkins (2024).[140]
- Hopkins, Gutiérrez-Marco & Di Silvestro (2024) describe fossil material of Leptoplastides salteri from the Fezouata Formation (Morocco), extending known range of this species from Avalonia into Gondwana.[141]
- Losso & Ortega-Hernández (2024) describe the appendages of Ceraurus pleurexanthemus and Flexicalymene senaria from the Walcott–Rust quarry (New York, United States) and report close morphological similarity of the exopodite structure in C. pleurexanthemus and Anacheirurus adserai in spite of the two species living in different environments and being separated by 20 million years.[142]
- Specimens of Dalmanitina socialis preserved with remains of the alimentary tract are described from the Ordovician Letná Formation (Czech Republic) by Fatka, Budil & Mikuláš (2024).[143]
- Bicknell et al. (2024) describe a specimen of Toxochasmops vormsiensis from the Katian Kõrgessaare Formation (Estonia) preserved molted within the body chamber of a nautiloid cephalopod Gorbyoceras textumaraneum, representing the first known record of cryptic molting of pterygometopid trilobites.[144]
- Evidence indicating that two peaks of in trilobite cephalic shape diversity in the Ordovician and the Devonian were caused by different underlying mechanisms is presented by Drage & Pates (2024).[145]
- A study on the biogeography of Cheirurina during the Ordovician is published by Pérez-Peris, Adrain & Daley (2024).[146]
- Bicknell, Smith & Miller-Camp (2024) and Bicknell, Smith & Hopkins (2024) revise the record of trilobite specimens with malformations from the collections of the Indiana University[147] and the American Museum of Natural History.[148]
- A study on the phylogenetic relationships of cheirurine, deiphonine and "cyrtometopine" cheirurids is published by Pérez-Peris, Adrain & Daley (2024).[149]
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Other arthropods
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- A study on the morphological diversity of carapaces of bradoriids is published by Cox & Pates (2024).[161]
- O'Flynn et al. (2024) describe new fossil material of Bushizheia yangi from the Cambrian Chengjiang Lagerstätte (China), providing new information on its head morphology, and interpret the studied specimens as supporting the interpretation of a six-segmented head as an ancestral state for Deuteropoda.[162]
- Redescription and a study on the affinities of Urokodia aequalis is published by Liu et al. (2024), who interpret this arthropod as a basal member of Artiopoda, and interpret its body plan as likely similar to the ancestral body plan for Artiopoda.[163]
- Lin et al. (2024) describe new fossil material of Retifacies abnormalis from the Cambrian Helinpu Formation (Yunnan, China) including large specimens with a carapace ornamentation different from what was previously known, and interpret the reported differences as developing during ontogeny, but don't consider them to indicate sexual dimorphs.[164]
- Li et al. (2024) report evidence of repeated decline of morphological diversity of eodiscids and agnostoids associated with Cambrian extinction events and with the Great Ordovician Biodiversification Event.[165]
- Izquierdo-López & Caron (2024) describe new fossil material of Odaraia alata from the Burgess Shale (Canada), including well-preserved mandibles that can be homologized with those of Cambrian fuxianhuiids and extant mandibulates.[166]
- Braddy (2024) reviews diversity, ichnology, ecology and evolution of euthycarcinoids, and names a new family Apankuridae.[167]
- A study on the anatomy of heads of juvenile specimens of Arthropleura from the Carboniferous Montceau-les-Mines Lagerstätte (France) is published by Lhéritier et al. (2024), who report evidence of the presence of millipede-like trunk tagmosis and centipede-like head characters in Arthropleura, and argue that Arthropleura might be a member of Pectinopoda more closely related to millipedes than to centipedes.[168]
- Le Cadre et al. (2024) describe new centipede specimens from the Cretaceous amber from Myanmar, including a henicopid representing the oldest unambiguous member of [[]] in the fossil record reported to date.[169]
- Review of the fossil record of millipedes is published by Álvarez-Rodríguez et al. (2024).[170]
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General research
- Turner, McLoughlin & Mays (2024) review the known record of plant–arthropod interactions on Early and Middle Triassic fossil leaves from Gondwana, reevaluate known record of the studied interactions in the Australian Middle Triassic Benolong Flora, and argue that concerted investigations can greatly increase the number of plant–arthropod interactions in the studied fossil assemblages.[171]
- Loewen et al. (2024) describe a diverse amber deposit from the Maastrichtian strata from the Big Muddy Badlands (Canada), preserving fossils of representatives of seven arthropod orders and at least 11 insect families, and interpret the studied assemblage as providing evidence of a faunal turnover among insects prior to the Cretaceous–Paleogene extinction event.[172]
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References
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