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LOST AND FOUND MACHAERACANTHUS SPINES FROM THE LOWER DEVONIAN OF WESTERN FRANCE

Abstract : Despite Machaeracanthus spines being first recorded and described from western France in the mid-nineteenth century, since then they have only rarely been documented from this region. Here we describe specimens from several localities of Pragian age, in particular those from Saint-Germain-le-Fouilloux which were first figured by Bézier in the early twentieth century. Although the spines are relatively rare, we have recognized two morphotypes, one with a characteristic feature of robust ribbing on the convex edged keel and the other with the same type of ribbing on the concave edged wing. As this feature distinguishes them from other Machaeracanthus species, we erect a new species Machaeracanthus bezieri nov. sp., which we have also identified in the Pragian of the Czech Republic and Germany.
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Submitted on : Monday, February 19, 2018 - 2:55:04 PM
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Carole Burrow, Damien Gendry. LOST AND FOUND MACHAERACANTHUS SPINES FROM THE LOWER DEVONIAN OF WESTERN FRANCE. Annales de la Société Géologique du Nord, 2017, 2ème série, Vol.24, pp.71-78. ⟨insu-01712436⟩

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