Fossil san Bothriolepis panderi nagpapakita han iya pectoral na parikpik

Placodermi, usa na extinct na class han mga prehistoric na isda na nabuhi sadton Silurian tubtob sa katapusan san Devonian Period.

An una na masusugad na placoderm ginuwa sa fossil record sadton kaurhian san Llandovery epoch sa Silurian.[1] An magkadurudilain na mga grupo san placoderm nagdaramo sadton Devonian, pero nagin extinct sa katapusan san Devonian Hangenberg event 360 milyones katuig an nakalabay[2]


Mga biolohikal na order han PlacodermiIgliwat

Antiarchi
Arthrodira
Brindabellaspida
Petalichthyida
Phyllolepida
Ptyctodontida
Rhenanida
Acanthothoraci
?Pseudopetalichthyida
?Stensioellida


Mga kasariganIgliwat

  1. Burrow, Carol & Turner, Susan (September 1998). "A review of placoderm scales, and their significance in placoderm phylogeny". Journal of Vertebrate Paleontology. 19 (2): 204–219. doi:10.1080/02724634.1999.10011135.CS1 maint: multiple names: authors list (link)
  2. Sallan, Lauren & Coates, Michael (June 2010). "End-Devonian extinction and a bottleneck in the early evolution of modern jawed vertebrates". Proceedings of the National Academy of Sciences. 107 (22): 10131–10125. doi:10.1073/pnas.0914000107. PMC 2890420. PMID 20479258.CS1 maint: multiple names: authors list (link)