Megadictyon

Megadictyon; Temporal range:
	Reconstruction of Megadictyon cf. haikouensis
Scientific classification
Kingdom:	Animalia
Phylum:	Lobopodia
Class:	†Xenusia
Order:	†Siberiida
Family:	†Siberiidae
Genus:	†Megadictyon; Luo & Hu, 1999
Species:	†M. haikouensis

Megadictyon is a genus of Cambrian lobopodian with similarities to Jianshanopodia and Siberion. Occasionally mis-spelt Magadictyon.[1]

Megadictyon is a large lobopodian, with body length (excluding appendages) possibly up to 20 centimeters in total.[2] The head has a pair of robust frontal appendages[3] associated with rows of spine and terminal claws.[2] Underside the head is a radiodont-like mouthpart forming by multiple layers of plates and teeth-like structures.[2] The trunk is wide and annulated, with a pair of well-developed lobopodous limbs on each body segment. Only 8 segment/limb pairs are countable in the incomplete fossil materials which lacking posterior region, so it may have had more (possibly up to 11 to 13) in nature.[2] It also has pairs of digestive glands similar to those of basal arthropods.[2][4]

References

"Corrigendum". Acta Zoologica. 89 (2): 183. 2007. doi:10.1111/j.1463-6395.2007.00307.x.
Liu, J.-N.; Shu, D.-G.; Han, J.; Zhang, Z.-F.; Zhang, X.-L. (2007). "Morpho-anatomy of the lobopod Magadictyon cf. haikouensis from the Early Cambrian Chengjiang Lagerstätte, South China". Acta Zoologica. 88: 279–288. doi:10.1111/j.1463-6395.2007.00281.x.
Liu, J.-N.; Shu, D.-G.; Han, J.; Zhang, Z.-F.; Zhang, X. (2008). "Origin, diversification, and relationships of Cambrian lobopods". Gondwana Research. 14 (1–2): 277–283. Bibcode:2008GondR..14..277L. doi:10.1016/j.gr.2007.10.001.
Vannier, Jean; Liu, Jianni; Lerosey-Aubril, Rudy; Vinther, Jakob; Daley, Allison C (2014). "Sophisticated digestive systems in early arthropods". Nature Communications. 5: 3641. Bibcode:2014NatCo...5.3641V. doi:10.1038/ncomms4641. PMID 24785191.

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[1] "Corrigendum". Acta Zoologica. 89 (2): 183. 2007. doi:10.1111/j.1463-6395.2007.00307.x.

[:0-2] Liu, J.-N.; Shu, D.-G.; Han, J.; Zhang, Z.-F.; Zhang, X.-L. (2007). "Morpho-anatomy of the lobopod Magadictyon cf. haikouensis from the Early Cambrian Chengjiang Lagerstätte, South China". Acta Zoologica. 88: 279–288. doi:10.1111/j.1463-6395.2007.00281.x.

[3] Liu, J.-N.; Shu, D.-G.; Han, J.; Zhang, Z.-F.; Zhang, X. (2008). "Origin, diversification, and relationships of Cambrian lobopods". Gondwana Research. 14 (1–2): 277–283. Bibcode:2008GondR..14..277L. doi:10.1016/j.gr.2007.10.001.

[4] Vannier, Jean; Liu, Jianni; Lerosey-Aubril, Rudy; Vinther, Jakob; Daley, Allison C (2014). "Sophisticated digestive systems in early arthropods". Nature Communications. 5: 3641. Bibcode:2014NatCo...5.3641V. doi:10.1038/ncomms4641. PMID 24785191.