| The cephalon lacks definite genal spines, and the tail spine, insofar as it can be reconstructed, does not appear to have been very long relative to the body. |
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| Genal regions are angular but are not developed into genal spines. |
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| Its posterior margin runs at right angles to the longitudinal axis, before swinging inwards to form distinct genal angles and a genal epimeron on the left-hand side. |
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| The cephalon of A. bergstroemi is a large, semi-elliptical shield that lacks genal spines and bears a glabella. |
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| The genal spine of the very smallest specimens is about as long as the remainder of the cheek, and remains distinct until late in meraspid ontogeny. |
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| Outside this angle the cephalic margin curves backward and outward, forming a notch beneath which the antenna may have emerged, then curves backward into the genal spine. |
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| The superciliary whiskers above the eyes and the genal whiskers on the cheeks are less rigid and distinctly less mobile than the mystacials. |
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| Besides the forests, there is an abundance of water in this region that makes possible a large number of orchards. Down below, where the River Genal widens and flows tranquilly, market gardens and orange groves appear. |
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