Iotuba

Iotuba; Temporal range: Chengjiang PreꞒ Ꞓ O S D C P T J K Pg N ↓
	Type specimen of Iotuba. From [1]
Scientific classification
Kingdom:	Animalia
Phylum:	incertae sedis
Genus:	†Iotuba
Species:	†I. chengjiangensis
Binomial name
	†Iotuba chengjiangensis; Chen et Zhou 1997 [1]

Iotuba chengjiangensis (sometimes mis-spelt Lotuba[2]) is a problematic Cambrian fossil with a U-shaped gut and tentacles, known from the Chengjiang biota. Originally interpreted as a phoronid marine animal, its affinity is currently disputed.[3] It, and the possibly-synonymous taxon Eophoronis, resemble the 'priapulid' Louisella.[4]

References

Chen, J.-Y.; Zhou, G.-Q. (1997). "Biology of the Chengjiang Fauna". Bull. Natl. Museum Nat. Sci. 10: 11–105.
Ma, Xiaoya; Hou, Xianguang; Baines, David (2010). "Phylogeny and evolutionary significance of vermiform animals from the Early Cambrian Chengjiang Lagerstätte". Science China Earth Sciences. 53 (12): 1774–1783. doi:10.1007/s11430-010-4084-y.
DY Huang; J Vannier; JY Chen (2004). "Anatomy and lifestyles of Early Cambrian priapulid worms exemplified by Corynetis and Anningvermis from the Maotianshan Shale (SW China)". Lethaia. 37: 21–33. doi:10.1080/00241160410005088.
Conway Morris, S. (2006). "Darwin's dilemma: the realities of the Cambrian 'explosion'". Philosophical Transactions of the Royal Society B: Biological Sciences. 361 (1470): 1069–1083. doi:10.1098/rstb.2006.1846. PMC 1578734. PMID 16754615.

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[chen-1] Chen, J.-Y.; Zhou, G.-Q. (1997). "Biology of the Chengjiang Fauna". Bull. Natl. Museum Nat. Sci. 10: 11–105.

[2] Ma, Xiaoya; Hou, Xianguang; Baines, David (2010). "Phylogeny and evolutionary significance of vermiform animals from the Early Cambrian Chengjiang Lagerstätte". Science China Earth Sciences. 53 (12): 1774–1783. doi:10.1007/s11430-010-4084-y.

[3] DY Huang; J Vannier; JY Chen (2004). "Anatomy and lifestyles of Early Cambrian priapulid worms exemplified by Corynetis and Anningvermis from the Maotianshan Shale (SW China)". Lethaia. 37: 21–33. doi:10.1080/00241160410005088.

[4] Conway Morris, S. (2006). "Darwin's dilemma: the realities of the Cambrian 'explosion'". Philosophical Transactions of the Royal Society B: Biological Sciences. 361 (1470): 1069–1083. doi:10.1098/rstb.2006.1846. PMC 1578734. PMID 16754615.