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mx id: 501 | OBO id: HAO:0000453 | URI: http://purl.obolibrary.org/obo/HAO_0000453
labium synonyms: ectolabium, second maxillae
Defined (both definition and relationships must be met)
Definition:
The appendage that is encircled by the area that is proximally delimited by the lateral margins of the cardo and the posterior stipital sclerite laterally, and the anatomical line that is tangential to the salivary duct and traverses the salivary orifice anteriorly.
written by: Deans, A. R. 2009. HAO curator..

Relationships / properties:
The labium is a anatomical cluster.
The labium is part of the mouthparts.

Figures
Athalia rosae Linnaeus, 1758

Label usage (sensu)
labium by Deans, A. R. 2009. HAO curator..
labium by Kirby, W., and W. Spencer. 1828. An introduction to Entomology: or elements of the natural history of insects. Longman, Rees, Orme, Brown & Green, London 732 pp.
second maxillae by Nichols, S. W. (eds.). 1989. The Torre-Bueno Glossary of Entomology. New York Entomological Society and the American Museum of Natural History, New York.
ectolabium by Nichols, S. W. (eds.). 1989. The Torre-Bueno Glossary of Entomology. New York Entomological Society and the American Museum of Natural History, New York.
Comments and tags
alternative definition added almost 7 years ago by Istvan Miko
The anatomical cluster that is composed of the unpaired glossa, paraglossae, unpaired prementum, unpaired postmentum, labial palps. The labium is situated between the maxillae and continuous anterodorsally with the hypopharyngeal wall.
  Reference: Deans, A. R. 2009. HAO curator..
  Cross reference: None provided.

alternative definition added almost 10 years ago by Istvan Miko
Unpaired, ventral sclerite of the mouthparts that forms the median portion of the labiomaxillary complex.
  Reference: Gibson , G. A. P., J. D. Read , and R. Fairchild. 1998. Chalcid wasps (Chalcidoidea): illustrated glossary of positional and morphological terms ..
  Cross reference: None provided.

comment added over 9 years ago by Katja Seltmann
definition in glossary includes the submentum. Not included in the class definition.
  Reference: Goulet, H., and J. T. Huber. 1993. Hymenoptera of the World: An Identification Guide to Families. Research Branch, Agriculture Canada Publication 1894/E., Ottawa, ON 668 pp.
  Cross reference: None provided.

alternative definition added over 10 years ago by Andy Deans
The posterior median appendage of the insect head formed by the union of the second maxillae.
  Reference: Snodgrass, R. E. 1935. Principles of insect morphology. McGraw-Hill Book Co., Inc., New York & London 667 pp.
  Cross reference: None provided.


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