Mandibulata

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The clade Mandibulata constitutes one of the two major living subdivisions of the phylum Arthropoda,[1] alongside Chelicerata. Mandibulates include the myriapods (centipedes and millipedes, among others), and the pancrustaceans (including all true insects). The name "Mandibulata" refers to the mandibles, a modified pair of limbs used in food processing, the presence of which are characteristic of most members of the group.

Characteristics

Mandibulates are characterized by a head tagma that has antennae and three feeding appendages that make up the mandible.[2]

Taxonomy

The name "Mandibulata" was originally used for a subgroup of insects by Joseph Philippe de Clairville in 1798.[3] In the 1930s, Robert Evans Snodgrass used the name to encompass myriapods, hexapods and crustaceans, which he considered to be united by a number of morphological similarities, including but not limited to the presence of mandibles.[4] This proposal was contested by some other 20th century scholars, who considered mandibles the result of convergent evolution,[5] though the monophyly of Mandibulata is now widely accepted based on genetic evidence.[6]

Phylogeny

Some studies suggest that Artiopoda, the broader group that contains trilobites and their extinct relatives, is more closely related to Mandibulata than to Chelicerata, and that artiopods and mandibulates are united by their shared presence of antennae, which these authors propose was a shared common ancestral trait. Consequently, the proposed clade containing both Artiopoda and Mandibulata is named Antennulata.[7] This grouping may also contain other extinct arthropod groups like Marrellomorpha.[8]

The mandibulates are divided between the extant groups Myriapoda (millipedes and centipedes, among others) and Pancrustacea (including crustaceans and hexapods, the latter group containing insects). Molecular phylogenetic studies suggest that the living arthropods are related as shown in the cladogram below. Crustaceans do not form a monophyletic group as insects and other hexapods have evolved from within them.[9][10][11]

Some extinct groups have been placed in Mandibulata, including Hymenocarina,[12] Euthycarcinoidea,[13] and Fuxianhuiida.[14]


Cladogram after Liu et al, 2026:[15]Script error: No such module "Clade". 

Cladogram of Mandibulata after Laville et al. (2025):[16]

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See also

References

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  1. ^ Page Module:Citation/CS1/styles.css has no content."Mandibulata". NCBI. Retrieved 2026-03-23.
  2. ^ Page Module:Citation/CS1/styles.css has no content.Chipman, Ariel D. (2024). Arthropoda II: Mandibulata. OUP Oxford. pp. 137–146. ISBN 978-0192893598.
  3. ^ Page Module:Citation/CS1/styles.css has no content.Schellenberg, Johann Rudolf; Joseph Philippe de, Clairville (1798). Helvetische Entomologie, oder, Verzeichniss der schweizerischen Insekten nach einer neuen Methode geordnet : mit Beschreibungen und Abbildungen. Zürich: Bei Orell, Füssli und Compagnie.
  4. ^ SNODGRASS, R. E. 1938. Evolution of the Annelida, Onychophora, and Arthropoda. Smithsonian Miscellaneous Collections 97: 1–159.
  5. ^ Edgecombe, G.D. ∙ Richter, S. ∙ Wilson, G.D.F. The mandibular gnathal edges: Homologous structures throughout Mandibulata? Afr. Invertebr. 2003; 44:115-135
  6. ^ Page Module:Citation/CS1/styles.css has no content.Giribet, Gonzalo; Edgecombe, Gregory D. (June 17, 2019). "The Phylogeny and Evolutionary History of Arthropods". Current Biology. 29 (12): R592–R602. doi:10.1016/j.cub.2019.04.057. ISSN 0960-9822.
  7. ^ Page Module:Citation/CS1/styles.css has no content.Aria, Cédric (26 April 2022). "The origin and early evolution of arthropods". Biological Reviews. 97 (5): 1786–1809. doi:10.1111/brv.12864. ISSN 1464-7931.
  8. ^ Page Module:Citation/CS1/styles.css has no content.Liu, Yao; Zeng, Han; Zhao, Fangchen; Zhu, Yuyan; Li, Yimeng; Yin, Zongjun; Zhu, Maoyan (31 May 2025). "A tiny Cambrian stem-mandibulate reveals independent evolution of limb tagmatization and specialization in early euarthropods". Scientific Reports. 15 (1). doi:10.1038/s41598-025-03544-0. PMC 12126567.
  9. ^ Page Module:Citation/CS1/styles.css has no content.Jerome C. Regier; Jeffrey W. Shultz; Andreas Zwick; April Hussey; Bernard Ball; Regina Wetzer; Joel W. Martin; Clifford W. Cunningham (2010). "Arthropod relationships revealed by phylogenomic analysis of nuclear protein-coding sequences". Nature. 463 (7284): 1079–1083. Bibcode:2010Natur.463.1079R. doi:10.1038/nature08742. PMID 20147900. S2CID 4427443.
  10. ^ Page Module:Citation/CS1/styles.css has no content.Björn M. von Reumont; Ronald A. Jenner; Matthew A. Wills; Emiliano Dell'Ampio; Günther Pass; Ingo Ebersberger; Benjamin Meyer; Stefan Koenemann; Thomas M. Iliffe; Alexandros Stamatakis; Oliver Niehuis; Karen Meusemann; Bernhard Misof (2011). "Pancrustacean phylogeny in the light of new phylogenomic data: support for Remipedia as the possible sister group of Hexapoda". Molecular Biology and Evolution. 29 (3): 1031–1045. doi:10.1093/molbev/msr270. PMID 22049065.
  11. ^ Page Module:Citation/CS1/styles.css has no content.Omar Rota-Stabelli; Lahcen Campbell; Henner Brinkmann; Gregory D. Edgecombe; Stuart J. Longhorn; Kevin J. Peterson; Davide Pisani; Herve Philippe; Maximilian J. Telford (2011). "A congruent solution to arthropod phylogeny: phylogenomics, microRNAs and morphology support monophyletic Mandibulata". Proceedings of the Royal Society B. 278 (1703): 298–306. doi:10.1098/rspb.2010.0590. PMC 3013382. PMID 20702459.
  12. ^ Page Module:Citation/CS1/styles.css has no content.Izquierdo-López, Alejandro; Caron, Jean-Bernard (August 2024). "The Cambrian Odaraia alata and the colonization of nektonic suspension-feeding niches by early mandibulates". Proceedings of the Royal Society B: Biological Sciences. 291 (2027). doi:10.1098/rspb.2024.0622. ISSN 1471-2954. PMC 11463219. PMID 39043240.
  13. ^ Page Module:Citation/CS1/styles.css has no content.Edgecombe, Gregory D.; Strullu-Derrien, Christine; Góral, Tomasz; Hetherington, Alexander J.; Thompson, Christine; Koch, Marcus (2020). "Aquatic stem group myriapods close a gap between molecular divergence dates and terrestrial fossil record". Proceedings of the National Academy of Sciences. 117 (16): 8966–8972. doi:10.1073/pnas.1920733117. PMC 7183169. PMID 32253305. S2CID 215408474.
  14. ^ Page Module:Citation/CS1/styles.css has no content.Aria, Cédric; Zhao, Fangchen; Zhu, Maoyan (September 2021). "Fuxianhuiids are mandibulates and share affinities with total-group Myriapoda". Journal of the Geological Society. 178 (5). doi:10.1144/jgs2020-246. ISSN 0016-7649.
  15. ^ Page Module:Citation/CS1/styles.css has no content.Liu, Cong; Pates, Stephen; Zhang, Mingjing; Wu, Yu; Ma, Jiaxin; Fu, Dongjing; Zhang, Xingliang (2026-03-21). "3D morphology of the Cambrian bivalved arthropod Sunella informs about head segmentation, arthrodization, and arthropodization". Communications Biology. doi:10.1038/s42003-026-09909-z. ISSN 2399-3642.
  16. ^ Page Module:Citation/CS1/styles.css has no content.Laville, Thomas; Forel, Marie-Béatrice; King, Andrew; Charbonnier, Sylvain (2025-11-01). "Synchrotron X-ray tomography sheds light on the phylogenetic affinities of the enigmatic thylacocephalans within Pancrustacea". Proceedings of the Royal Society B: Biological Sciences. 292.

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