Mandibulata
| Mandibulata Temporal range:
| |||
|---|---|---|---|
| The mandibles of a bull ant | |||
| Life restoration of Odaraia, an early mandibulate belonging to Hymenocarina with mandibles present near the mouth | |||
| Scientific classification | |||
| Kingdom: | Animalia | ||
| Phylum: | Arthropoda | ||
| Clade: | Mandibulata de Clairville, 1798 | ||
| Subdivisions | |||
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The clade Mandibulata constitutes one of the major subdivisions of the phylum Arthropoda, 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.
Phylogeny
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.[1][2][3]
Some extinct groups have been placed in Mandibulata, including Hymenocarina,[4] Euthycarcinoidea,[5] and Fuxianhuiida.[6]
Cladogram after O'Flynn et al, 2023:[7]
| Total group |
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| Arthropoda |
Cladogram of Mandibulata after Laville et al. (2025):[8]
| Mandibulata |
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Taxonomic history
The name "Mandibulata" was originally used for a subgroup of insects by Joseph Philippe de Clairville in 1798.[9] 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.[10] This proposal was contested by some other 20th century scholars, who considered mandibles the result of convergent evolution,[11] though the existence of Mandibulata is now widely accepted based on genetic evidence.[12]
See also
- Atelocerata
- Marrellomorpha
- Myriochelata
- Pancrustacea
- Crustaceomorpha
- Antennulata
- Arachnomorpha
- Uniramia
References
- ^ 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.
- ^ 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.
- ^ 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.
- ^ 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.
- ^ 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.
- ^ 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.
- ^ O’Flynn, Robert J.; Liu, Yu; Hou, Xianguang; Mai, Huijuan; Yu, Mengxiao; Zhuang, Songling; Williams, Mark; Guo, Jin; Edgecombe, Gregory D. (August 2023). "The early Cambrian Kylinxia zhangi and evolution of the arthropod head". Current Biology. 33 (18): 4006–4013.e2. Bibcode:2023CBio...33E4006O. doi:10.1016/j.cub.2023.08.022. hdl:10141/623137. ISSN 0960-9822. PMID 37643622.
- ^ 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.
- ^ 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.
- ^ SNODGRASS, R. E. 1938. Evolution of the Annelida, Onychophora, and Arthropoda. Smithsonian Miscellaneous Collections 97: 1–159.
- ^ Edgecombe, G.D. ∙ Richter, S. ∙ Wilson, G.D.F. The mandibular gnathal edges: Homologous structures throughout Mandibulata? Afr. Invertebr. 2003; 44:115-135
- ^ 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.