FIG. 2 in Machaeracanthus goujeti n. sp. (Acanthodii) from the Lower Devonian of Spain and northwest France, with special reference to spine histology

FIG. 2. — Synthetic columns of the axial depression of Nigüella (NI) (A) and of the axial depression of the Río Cámaras (ADRC) (B) with the distribution of the different types of remains attributed to Machaeracanthus goujeti n. sp. from the Lochkovian-Pragian strata of the Nogueras Fm. (modified from Valenzuela-Ríos & Botella 2000; Botella & Valenzuela-Ríos 2005).