Homostiidae

Homostiidae
Temporal range: Early Devonian–Middle Devonian
Homosteus milleri
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: †Placodermi
Order: †Arthrodira
Suborder: †Brachythoraci
Family: †Homostiidae
Jaekel, 1903
Type species
Homosteus formosissimus
Asmuss, 1856
Genera
Synonyms
  • Chelonichthyidae Dean, 1901
  • Euleptaspididae Obruchev, 1964[1]: 70 
  • (order) Temnothoraci Dean, 1901
  • (suborder) Homostei Jaekel, 1911

Homostiidae (alternatively spelled Homosteidae) is a family of flattened arthrodire placoderms from the Early to Middle Devonian. Fossils appear in various strata in Europe, Russia, Morocco, Australia, Canada and Greenland.

Homostiids have flattened and elongated skulls, "toothless" jaws and large sizes, suggesting that many were probably filter feeders, similar to the noticeably flattened whale shark.[2][3][4][5] According to Denison 1978, primitive homostiids have moderately long median dorsal plates, whereas in "advanced" homostiids, the median dorsal tends to be short and broad.[1]: 69 

  1. ^ a b Denison R (1978). Handbook of Paleoichthyology. Vol. 2: Placodermi. Stuttgart New York: Gustav Fischer Verlag. ISBN 978-0-89574-027-4.
  2. ^ "Před 400 milióny lety u nás žili gigantičtí obratlovci" [400 million years ago, gigantic vertebrates lived here]. National Museum News (in Czech). 4 December 2014.
  3. ^ Vaškaninová V, Kraft P (2014). "The largest Lower Devonian placoderm-Antineosteus rufus sp. nov. from the Barrandian area (Czech Republic)" (PDF). Bulletin of Geosciences. 89 (3): 635–644.
  4. ^ "Fish from the Emsian of Aragón". 2006. S2CID 218464633. {{cite web}}: Missing or empty |url= (help)
  5. ^ Coatham SJ, Vinther J, Rayfield EJ, Klug C (May 2020). "Was the Devonian placoderm Titanichthys a suspension feeder?". Royal Society Open Science. 7 (5): 200272. Bibcode:2020RSOS....700272C. doi:10.1098/rsos.200272. PMC 7277245. PMID 32537223.