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The Protocephalon: A Critique of Recent Interpretations1

Published online by Cambridge University Press:  31 May 2012

E. Melville DuPorte
E. Melville DuPorte
Affiliation:
Macdonald College, McGill University
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Extract

The term “protocephalon” as used by Snodgrass (1938) applies to that portion of the head which lies anterior to the mandibular segment. As defined by him it is composed of the “prostomial acron” and a postantennal segment. The term “acron” has been used in somewhat different senses by different authors and to avoid confusion I have introduced the term “blastocephalon” instead. The blastocephalon may be defined as that portion of the head which includes the labrum, clypeus and occulo-antenna1 region. In the germ band it appears as an expanded anterior region, the cephalic lobes, which forms a sort of early embryonic head, hence the name. The posterior trunk-like region of the germ band may then be called the blastocorm.

Type
Articles
Information
The Canadian Entomologist , Volume 85 , Issue 2 , February 1953 , pp. 41 - 55
Copyright
Copyright © Entomological Society of Canada 1953

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References

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