Lanarkia

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Lanarkia
Temporal range: Upper Silurian
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Animalia
Phylum: Chordata
Infraphylum: Agnatha
Class: Thelodonti
Order: Furcacaudiformes
Family: Lanarkiidae
Genus: Lanarkia
Traquair, 1898
Type species
Lanarkia horrida
Traquair, 1898
Other species
  • Lanarkia lanceolataMarss & Ritchie, 1998
  • Lanarkia spinulosaTraquair, 1898
Synonyms
  • Lanarkia spinosaTraquair, 1898

Lanarkia is a genus of extinct thelodont agnathan which existed in what is now Scotland and Canada during the upper Silurian period. [1] [2]

Description

Lanarkia were very small fish around 30-45 cm in length that would have been possible prey to eurypterids. [3]

The scales of Lanarkia spinulosa likely served an anti-parasite role, similar to modern sharks which form large groups and cruise at slow to medium speeds. Lanarkia lanceolata preserves scales with a generalized form, similar to modern sharks which swim slowly in open deep-water environments. Lanarkia horrida has an unusual combination of small and larger pointed scales. They could have served a generalist or anti-predator role, though juvenile small-spotted catsharks (Scyliorhinus canicula) use similar scales on their tail to rasp at food. [4] [5]

References

  1. Lanarkia horrida at www.fossilmuseum.net.
  2. Märss, T.; Ritchie, A. (1997). "Articulated thelodonts (Agnatha) of Scotland". Transactions of the Royal Society of Edinburgh: Earth Sciences. 88 (3): 143–195. doi:10.1017/S026359330000691X. ISSN   0263-5933.
  3. "Lanarkia sp". www.athenapub.com. Retrieved 2024-10-05.
  4. Ferrón, Humberto G.; Botella, Héctor (2017). "Squamation and ecology of thelodonts". PLOS ONE. 12 (2): e0172781. Bibcode:2017PLoSO..1272781F. doi: 10.1371/journal.pone.0172781 . PMC   5328365 . PMID   28241029.{{cite journal}}: CS1 maint: article number as page number (link)
  5. Ferrón, Humberto G; Martínez-Pérez, Carlos; Turner, Susan; Manzanares, Esther; Botella, Héctor (2018). "Patterns of ecological diversification in thelodonts". Palaeontology. 61 (2): 303–315. doi:10.1111/pala.12347. hdl: 10550/85568 .