One of the mysteries of the English language finally explained.
- ‘Ancyloceratina, which contains all other Mesozoic heteromorphs, evolved from Perisphictidae during the Tithonian.’
- ‘Most heteromorphs form a U-shaped chamber, whereas many normally coiled ammonites inflate or enlarge the terminal body chamber and constrict the aperture.’
- ‘Most heteromorph ammonites have a hooked terminal body chamber.’
- ‘The presence of occasional preadult heteromorphs was mentioned also by Schallreuter, Jones and Meidla.’
- ‘In the stages A - 3 to AI heteromorphs can be distinguished from tecnomorphs by slightly broader velum in the anteroventral region.’
- ‘Size dimorphism, in which the heteromorphs are slightly larger than the tecnomorphs, can be recognized in late instars.’
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