Cruziana acacensis Seilacher - New interpretation of origin

Cruziana acacensis Seilacher - Nova interpretacija nastanka

Authors

  • Aleksandar Grubić University of Belgrade, Faculty of Mining and Geology, Institute of Regional Geology and Paleontology, Kamenička 6, 11000 Belgrade, Serbia.

Keywords:

Cruziana, Rusophycus, trace fossils, gills, Agnatha, Chordata, Paleozoic

Abstract

An external cast from the Silurian Acacus Formation of Jabal Acacaus in Fazzan (locality of the Desio's collection, 1940; Libya) shows herringbone-shaped bands on bilobate base. This is typical Cruziana acacensis Seilacher. Fossil shows, however, new surprising details: mouth cast on the ventral surface, seven nodes on each side where external banded gills end, eye casts, nasal capsule apertures and posterior apertures of the general gill canals. This fossil was formed as an external cast from the external mould of an unknown and extinct Agnatha group with the presence of characteristic external banded gills. New fact of the Cruziana acacensis origin lead to the news and important inferences.

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Published

1995-12-20

Issue

Vol. 59 No. 1 (1995): Geološki anali Balkanskoga poluostrva

Section

Original Scientific Paper

How to Cite

“Cruziana acacensis Seilacher - New interpretation of origin: Cruziana acacensis Seilacher - Nova interpretacija nastanka” (1995) Geološki anali Balkanskoga poluostrva, 59(1), pp. 111–129. Available at: https://gabp.rgf.bg.ac.rs/index.php/gabp/article/view/508 (Accessed: 4 November 2026).