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Tannuolina

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Tannuolina
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Family: Tannuolinidae
Genus: Tannuolina
Fonin & Smirnova, 1967
Type species
Tannuolina multifora
Fonin & Smirnova, 1967
Species
  • T. fonini
  • T. maroccana
  • T. multifora
  • T. pavlovi
  • T. zhangwentangi

Tannuolina is a genus of tommotiid, belonging to the brachiopod stem lineage.

Its phosphatic shells exhibit a complex series of open pores/chambers/channels in outer shell layer.[1][2] It is conventionally interpreted as an essentially bivalved organism, similar to Micrina, though some use the unequal ratio of stellate to mitrate sclerites to argue for a halkieriid-like anatomy.[3]

More recently a tube-like construction inspired by Eccentrotheca has been proposed.[4]

Species

[edit]
  • T. fonini Esakova in Esakova & Zhegallo, 1996
  • T. maroccana Skovsted & Clausen in Skovsted, Clausen, Álvaro & Ponlevé, 2014[4]
  • T. multifora Fonin & Smirnova, 1967
  • T. pavlovi Kouchinsky et al., 2010[1]
  • T. zhangwentangi Qian & Bengtson, 1989

References

[edit]
  1. ^ a b Kouchinsky, A., Bengtson, S. & Murdock, D. J. E. A new tannuolinid problematic from the lower Cambrian of the Sukharikha River in northern Siberia. Acta Pal. Pol. 55, 321–331 (2010).
  2. ^ Skovsted, C. B. Small shelly fauna from the upper Lower Cambrian Bastion and Ella Island Formations, north-east Greenland. J. Paleontol. 80, 1087–1112 (2006).
  3. ^ Li, G.-X. & Xiao, S.-H. Tannuolina and Micrina (Tannuolinidae) from the Lower Cambrian of Eastern Yunnan, South China, and Their Scleritome Reconstruction. J. Paleontol. 78(5), 900–913 (2004). doi:10.1666/0022-3360(2004)078<0900:TAMTFT>2.0.CO;2 JSTOR 4094916
  4. ^ a b Skovsted, C. B., S. Clausen, J. J. Álvaro, and D. Ponlevé. 2014: Tommotiids from the early Cambrian (Series 2, Stage 3) of Morocco and the evolution of the tannuolinid scleritome and setigerous shell structures in stem group brachiopods. Palaeontology 57:171–192. doi:10.1111/pala.12060