07204 - Top Rare Association  Symphysops sp + Prionocheilus sp Upper Ordovician Trilobites
07204 - Top Rare Association  Symphysops sp + Prionocheilus sp Upper Ordovician Trilobites 07204 - Top Rare Association  Symphysops sp + Prionocheilus sp Upper Ordovician Trilobites 07204 - Top Rare Association  Symphysops sp + Prionocheilus sp Upper Ordovician Trilobites 07204 - Top Rare Association  Symphysops sp + Prionocheilus sp Upper Ordovician Trilobites 07204 - Top Rare Association  Symphysops sp + Prionocheilus sp Upper Ordovician Trilobites 07204 - Top Rare Association  Symphysops sp + Prionocheilus sp Upper Ordovician Trilobites 07204 - Top Rare Association  Symphysops sp + Prionocheilus sp Upper Ordovician Trilobites 07204 - Top Rare Association  Symphysops sp + Prionocheilus sp Upper Ordovician Trilobites 07204 - Top Rare Association  Symphysops sp + Prionocheilus sp Upper Ordovician Trilobites

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07204 - Top Rare Association Symphysops sp + Prionocheilus sp Upper Ordovician Trilobites

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Species
Symphysops sp, Raymond (1925) + Prionocheilus sp, Rouault (1847) - Trilobites
Age
Upper Ordovician, Lower Ashgill (~445 Million Years)
Location
Jbel Tizi n’Mouri, El Kaid Errami, South Morocco
Formation
Lower Ktaoua Fm
Size
46.5 mm   •    in
Weight
976 g   •    oz
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Description

Specimens of an extremely rare species .

Symphysops sp, Raymond 1925 (trilobite)
Trilobita - Asaphida - Cyclopygidae


Parent taxon: Cyclopygidae according to P. A. Jell and J. M. Adrain 2002

See also Sepkoski 2002

Sister taxa: Aspidaeglina, Circulocrania, Cyclopyge, Degamella, Ellipsotaphrus, Emmrichops, Gastropolus, Girvanopyge, Heterocyclopyge, Microparia, Novakella, Phylacops, Pricyclopyginae, Prospectatrix, Psilacella, Sagavia, Xenocyclopyge

Subtaxa: Symphysops djebaglensis

Ecology: nektonic microcarnivore

Environments: offshore, carbonate, deep subtidal, marine, submarine fan, offshore shelf.

Age range: 466.0 to 445.6 Ma

Prionocheilus sp, Rouault 1847 (trilobite)
Trilobita - Phacopida - Calymenidae


Parent taxon: Pharostomatinae according to A. W. Owen and D. L. Bruton 1980

See also Jell and Adrain 2002, Sepkoski 2002 and Siveter 1977

Sister taxa: Pharostoma, Xuanenia

Subtaxa: Prionocheilus mendax, Prionocheilus narinosum, Prionocheilus narinosus, Prionocheilus obtusus, Prionocheilus verneuili

Type: Prionocheilus verneuili

Ecology: nektobenthic carnivore

Age range: 478.6 to 445.6 Ma

Distribution:

• Ordovician of Belgium, the Czech Republic, France, Morocco, Norway, Portugal, Spain, the United Kingdom

• Llandeilo of China 

• Arenig of France, Morocco , Spain

Prionocheilus sp: Fossilworks (Paleobiology Database)

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