Laugiidae

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Laugiidae
Fossil of Coccoderma suevicum in the Jura Museum in Eichstätt

Fossil of Coccoderma suevicum in the Jura Museum in Eichstätt

Temporal occurrence
Griesbachian ( Lower Triassic ) to Tithonian ( Upper Jurassic )
251.9 to 145 million years
Locations
Systematics
Sub-stem : Vertebrates (vertebrata)
Superclass : Jaw mouths (Gnathostomata)
Class : Meat finisher (Sarcopterygii)
Subclass : Actinistia
Order : Quastenflosser (Coelacanthiformes)
Family : Laugiidae
Scientific name
Laugiidae
Stensio , 1932

The Laugiidae are a coelacanth family that occurred from the Lower Triassic to the Upper Jurassic . Fossils of the genera belonging to the Laugiidae have been found in Germany, Greenland and possibly in China.

features

The Laugiidae were small to medium-sized fish (17-25 cm) of slim to squat shape. The head was narrow, the eyes large, the muzzle pointed or rounded, the mouth moderately deep. The first dorsal fin stood in front of the middle of the body, the second in the back of the body. The pelvic fins were behind the dorsal fin. The bones of the pelvic fins were either enlarged laterally or fused together over their entire ventral midline. The caudal fin was three-lobed, the middle clearly brush-shaped. The bones of the cheeks (sides of the head) were reduced. The pores of the lateral line system on the head became larger and larger towards the end of the snout and towards the symphysis of the lower jaw.

Genera

  • Coccoderma Qyendstedt, 1858 (Tithonium, Bavaria)
  • Laugia Stensiö, 1932 (Griesbachium, Greenland)

literature

  • Peter L. Forey: History of the Coelacanth Fishes. Springer Verlag GmbH, ISBN 0-412-78480-7
  • Karl Albert Frickhinger: Fossils Atlas Fishes. Mergus-Verlag, Melle, 1999, ISBN 3-88244-018-X

Individual evidence

  1. Jinnan Tong, Xiugao Zhou, Douglas H. Erwin, Jingxun Zuo & Laishi Zhao: Fossil fishes from the Lower Triassic of Majiashan, Chaohu, Anhui Province, China . In: Journal of Paleontology 80 (1), 2006, pp. 146-161. doi : 10.1666 / 0022-3360 (2006) 080 [0146: FFFTLT] 2.0.CO; 2

Web links

Commons : Laugiidae  - collection of images, videos and audio files