| 11. | The suture has an angular ventral saddle, broad shallow lateral lobe, and a dorsal lobe.
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| 12. | There are low nodes on the flanks and the suture is slightly sinous but with a prominent dorsal lobe.
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| 13. | In " E . melaphareus ", an inconspicuous patch exists on the dorsal lobe of the caudal fin.
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| 14. | The ventral lobe is moderately wide, lanceolate or linguate, tongue-shaped; the dorsal lobe deep and narrow.
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| 15. | "Acrimeroceras " has a shell like that of " Paratornoceras " with biconvex growth lines and constrictions and simple dorsal lobe.
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| 16. | During maturation, the ventral bud flips to the other side of the gut tube ( arrow ) where it typically fuses with the dorsal lobe.
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| 17. | The exposed suture has four primary lobes on either side; the internal dorsal lobe is not cruciform ( i . e . shaped in a cross ).
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| 18. | The suture is simple, with a broad ventral saddle, broad lateral lobe, a dorso-lateral saddle, and a moderately deep hidden dorsal lobe.
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| 19. | The species was first specific epithet " praeustus " is Latin; meaning " burnt at the tip ", in reference to its black dorsal lobe.
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| 20. | It grows to a length of 5.9 cm and can be distinguished from its congeners by an inconspicuous patch exists on the dorsal lobe of the caudal fin.
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