An unusual occurrence of Pedinopariops (Trilobita: Phacopidae) within siliciclastic facies in the Devonian of Awaynat Wanin, Libya


Authors: McKellar RC, Chatterton BDE, Meinhold G, Ben Rahuma MM

Published in: Bulletin of Geosciences, volume 87, issue 2; pages: 219 - 225; Received 14 June 2011; Accepted in revised form 7 October 2011; Online 18 November 2011

Keywords: Trilobita, Phacopidae, Devonian, Givetian, Awaynat Wanin, Ghadamis Basin, Libya,

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A new phacopid trilobite is described from the Givetian sequence of the Awaynat Wanin Group in the southern Ghadamis Basin, Libya. The specimen displays most of the eye and sculpture features necessary for a determination and can be restricted to Pedinopariops (Hypsipariops) Struve, 1982. The new specimen does not belong to any taxon known so far and hence is considered to be a new species. The specimen remains in open nomenclature and is assigned to Pedinopariops (Hypsipariops) sp. nov. A. This is the first Devonian trilobite described from Libya, and represents an unusual occurrence of Phacopidae in a relatively coarse siliciclastic facies.


Basse, M. 1998. Trilobiten aus mittelerem Devon des Rhenohercynikums III. Proetida (3), Phacopida (2), Lichida (Lichoidea, Odontopleuroidea) und ergänzende Daten. Palaeontographica, Abteilung A 249, 1–162.

Basse, M. 2006. Eifel-Trilobiten IV: Proetida (3), Phacopida (3). 305 pp. Edition Goldschneck, Quelle & Meyer Verlag, Wiebelsheim.

Basse, M. & Weddige, K. 2004. Typen-Katalog der Trilobiten-Sammlung des Naturmuseums und Forschungsinstituts Senckenberg. Senckenbergiana lethaea 84, 141–172.View article

Becq-Giraudon, J.-F. & Massa, D. 1996. Dreyfussina libyca nov. sp. (Trilobita, Phacopacea) de la Formation Melez-Chograne, Caradoc Supérieur de Libye. Geobios 20, 49–54.View article

Belhaj, F. 1996. Palaeozoic and Mesozoic Stratigraphy of Eastern Ghadamis and Western Sirt Basins, 57–96. In Salem, M.J., Mouzughi, A.J. & Hammuda, O.S. (eds) The Geology of Sirt Basin. Elsevier, Amsterdam.

Ben Rahuma, M., Proust, J.-N. & Eschard, R. 2008. The Stratigraphic Evolution of the Devonian Sequences, Awaynat Wanin area, Southern Ghadamis Basin: a Fieldguide Book. 67 pp. Libyan Petroleum Institute, Tripoli.

Chlupáč, I. 1977. The phacopid trilobites of the Silurian and Devonian of Czechoslovakia. Rozpravy Ústředního ústavu geologického 43, 1–172.

Cocks, L.R.M. & Fortey, R.A. 1988. Lower Palaeozoic facies and faunas around Gondwana, 183–200. In Audley-Charles, M.G. & Hallam, A. (eds) Gondwana and Tethys. Geological Society Special Publications 37.

Crônier, C., Bignon, A. & François, A. 2011. Morphological and ontogenetic criteria for defining a trilobite species: the example of Siluro-Devonian Phacopidae. Comptes Rendus Palevol 10, 143–153.View article

Crônier, C., Feist, R. & Auffray, J.C. 2004. Variation in the eye of Acuticryphops (Phacopina, Trilobita) and its evolutionary significance: a biometric and morphometric approach. Paleobiology 30, 471–481.View article

Crônier, C. & van Viersen, A. 2008. The ‘Mur des douaniers’, and exceptionally well-preserved Early Eifelian fossil site. Bulletin de la Société géologique de France 179, 89–95.View article

Echikh, K. 1998. Geology and hydrocarbon occurrences in the Ghadames Basin, Algeria, Tunisia, Libya, 109–129. In MacGregor, D.S., Moody, R.T.J. & Clark-Lowes, D.D. (eds) Petroleum Geology of North Africa. Geological Society Special Publication 132.

Feist, R., McNamara, K.J., Crônier, C. & Lerosey-Aubril, R. 2009. Patterns of extinction and recovery of phacopid trilobites during the Frasnian–Fammenian (Late Devonian) mass extinction event, Canning Basin, Western Australia. Geological Magazine 146(1), 12–33.View article

Fortey, R.A. & Owens, R.M. 1999. Feeding habits in trilobites. Palaeontology 42(3), 429–465.View article

Fortey, R.A.&Wilmot, N.V. 1991. Trilobite cuticle thickness in relation to palaeoenvironment. Paläontologische Zeitschrift 65(1/2), 141–151.View article

Gundobin, V.M. 1985. Geological map of Libya 1:250,000: Qararat Al Marar NH33-13. Industrial Research Centre, Tripoli.

Hecht, F., Fürst, M. & Klitzsch, E. 1964. Zur Geologie von Libyen. Geologische Rundschau 53, 413–470.View article

Königshof, P., Ben Rahuma, M. & Proust, J.-N. 2008. IGCP 499: Devonian land-sea transitional settings. Episodes 31, 438–439.

McKellar, R.C. & Chatterton, B.D.E. 2008. Biostratigraphy and systematics of select Lower and Middle Devonian Phacopidae (Trilobita) from Southern Morocco, 259–264. In Rábano, I., Gozalo, R. & García-Bellido, D. (eds) Advances in trilobite research. Del Museo Geominero, Instituto Geológico y Minero de Espana, Madrid 9.

McKellar, R.C. & Chatterton, B.D.E. 2009. Early and Middle Devonian Phacopidae (Trilobita) of southern Morocco. Palaeontographica Canadiana 28, 1–110.

McRoberts, C.A. & Newell, N.D. 2005. Marine Myalinidae (Bivalvia: Pterioida) from the Permian of West Texas. American Museum Novitates 3469, 1–15.View article

Mergl, M. & Massa, D. 1992. Devonian and Lower Devonian brachiopods and bivalves from Western Libya. Biostratigraphie du Paleozoique 12, 1–115.

Mergl, M. & Massa, D. 2000. A palaeontological review of the Devonian and Carboniferous succession of the Murzuq Basin and the Djado Sub-Basin, 41–88. In Sola, M.A. & Worsley, D. (eds) Geological Exploration in Murzuq Basin. Elsevier, Amsterdam.

Münster, G.G. 1840. Die Versteinerungen des Uebergangskalkes mit Clymenien und Orthoceratiten von Oberfranken. Beiträge zur Petrefacten-Kunde 3, 33–121.

Seilacher, A. 1969. Sedimentary rhythms and trace fossils in Paleozoic sandstone of Libya, 117–123. In Kannes, W.H. (ed.) Geology, archeology and prehistory of southwestern Fezzan, Libya. 11th Annual Conference. Tripoli.

Seilacher, A., Lüning, S., Martin, M.A., Klitzsch, E., Khoja, A. & Craig, J. 2002. Ichnostratigraphic correlation of Lower Palaeozoic clastics in the Kufra Basin (SE Libya). Lethaia 35, 257–262.View article

Struve, W. 1972. Phacops-Arten aus dem Rheinischen Devon. 2. Untergattungs-Zuweisung. Senckenbergiana lethaea 53, 383–403.

Struve, W. 1982. Beiträge zur Kenntnis der Phacopina (Trilobita), 10: Neue Untersuchungen über Geesops (Phacopinae; Unter- und Mittel-Devon. Senckenbergiana lethaea 63, 473–495.

Struve, W. 1992. Neues zur Stratigraphie und Fauna des rhenotypen Mittel-Devon. Senckenbergiana lethaea 71, 503–624.

Struve, W. 1995. Die Riesen-Phacopiden aus dem Maider, SE-marokkanische Prä-Sahara. Senckenbergiana lethaea 75, 77–129.

Vos, R.G. 1981. Deltaic sedimentation in the Devonian of western Libya. Sedimentary Geology 29, 67–88.View article