Tannuolina

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

Tannuolina
Scientific classification
Kingdom: Animalia
Clade: Lophophorata
Order: †"Tommotiida"
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

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
  • 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
gollark: It could likely be run off SDRs or something, at great cost, or just be tunable in a few bands.
gollark: I suppose frequency-hopping GEORGEnet could probably be done.
gollark: For example, no encryption, no music and stuff too, I think the US limits you to 9600 baud (!!!) on some bands, and also you probably can't run tons of traffic over it or someone will be annoyed.
gollark: There are annoying constraints.
gollark: GEORGEnet should obviously run over arbitrary IRC networks, apian carriers, bouncing signals off GTech™ lunar stations, amplitude modulated earthquakes, or ultra-high-intensity transplanetary gamma ray transceivers.

References
  1. 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. 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


This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.