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mx id: 1442 | OBO id: HAO:0001547 | URI: http://purl.obolibrary.org/obo/HAO_0001547
chorion
Defined (both definition and relationships must be met)
Definition:
A hard shell external to the vitelline membrane of the egg.
written by: Tweedie, S., M. Ashburner, K. Falls, P. Leyland, P. McQuilton, S. Marygold, G. Millburn, D. Osumi-Sutherland, A. Schroeder, R. Seal, H. Zhang, and The FlyBase Consortium. 2009. FlyBase: enhancing Drosophila Gene Ontology annotations. Nucleic Acids Research 37:D555-D559.

Relationships / properties:
The chorion is a acellular anatomical structure.
The chorion is part of the egg.

Label usage (sensu)
chorion by Tweedie, S., M. Ashburner, K. Falls, P. Leyland, P. McQuilton, S. Marygold, G. Millburn, D. Osumi-Sutherland, A. Schroeder, R. Seal, H. Zhang, and The FlyBase Consortium. 2009. FlyBase: enhancing Drosophila Gene Ontology annotations. Nucleic Acids Research 37:D555-D559.
Comments and tags
alternative definition added about 10 years ago by Andy Deans
The egg shell secreted by the follicle cells of the ovarial egg chamber.
  Reference: Snodgrass, R. E. 1935. Principles of insect morphology. McGraw-Hill Book Co., Inc., New York & London 667 pp.
  Cross reference: None provided.

xref added about 10 years ago by Andy Deans
  Reference: Tweedie, S., M. Ashburner, K. Falls, P. Leyland, P. McQuilton, S. Marygold, G. Millburn, D. Osumi-Sutherland, A. Schroeder, R. Seal, H. Zhang, and The FlyBase Consortium. 2009. FlyBase: enhancing Drosophila Gene Ontology annotations. Nucleic Acids Research 37:D555-D559.
  Cross reference: FBbt:00000038


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