Hostname: page-component-84b7d79bbc-tsvsl Total loading time: 0 Render date: 2024-07-26T21:56:08.954Z Has data issue: false hasContentIssue false
  • English
  • Français

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
Get access Rights & Permissions [Opens in a new window]

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

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

DuPorte, E. Melville. 1946. Observations on the morphology of the face in insects. J. Morph. 79: 371–418.Google Scholar
DuPorte, E. Melville and Bigelow, R. S.. 1953. The clypeus and the epistomal suture in Hymenoptera. Can. Journ. Zool. 31(1): 20–29.CrossRefGoogle Scholar
Ferris, G. F. 1942. Some observations on the head of insects. Microentomology 7: 10–27.Google Scholar
Ferris, G. F. 1943. The basic materials of the insect cranium. Microentomology 8: 8–24.Google Scholar
Ferris, G. F. 1947. Contradictions of the insect head. Microentomology 12: 59–64.Google Scholar
Henderson, K. F., Henderson, W. D. and Kenneth, John K.. 1949. A dictionary of scientific terms. 4th edit.Edinburgh and London, Oliver and Boyd.Google Scholar
Henry, Laura M. 1947. The nervous system and segmentation of the head in the Annulata; sections I, II and III. Microentomology 12: 61–110.Google Scholar
Henry, Laura M. 1948. The nervous system and segmentation of the head in the Annulata; sections IV–VIII. Microentomology 13: 1–48.Google Scholar
Henry, Laura M. 1949. The nervous system and segmentation of the head in a scorpion (Arachnida). Microentomology 14: 120–125.Google Scholar
Lee, Helen Tsui-Ying. 1948. A comparative morphological study of the prothoracic glandular bands of some lepidopterous larvae with special reference to their innervation. Ann. Entom. Soc. Amer. 41: 200–205.Google Scholar
Snodgrass, R. E. 1935. Principles of insect morphology. New York, McGraw-Hill.Google Scholar
Snodgrass, R. E. 1938. Evolution of Annelida, Onychophora and Arthropoda. Smithson. Misc. Coll. 97(6): 1–159.Google Scholar
Tiegs, W. with assistance by Murray, Florence V.. 1938. The embryonic development of Calandra oryzae. Quart. J. Micr. Sc. 80: 159–284.Google Scholar
Wiesmann, R. 1926. In Leuzinger, H., Wiesmann, R. and Lehman, F. E.. Zur Kenntnis der Anatomie und Entwicklungsgeschichte der Stabheuschrecke, Carausius morosus Br. Jena, Emil Fischer.Google Scholar