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mx id: 1261 | OBO id: HAO:0000898 | URI: http://purl.obolibrary.org/obo/HAO_0000898
rhachis
Defined (both definition and relationships must be met)
Definition:
The ridge that extends along the ventral surface of the second valvula that is partially enclosed by the aulax.
written by: Miko, I. 2009. -2019 Curator. Hymenoptera Anatomy Ontology.

Relationships / properties:
The rhachis is a ridge.
The rhachis is part of the cuticle. The rhachis is part of the sclerite. The rhachis is part of the second valvula.

Label usage (sensu)
rhachis by Ronquist, F., and G. Nordlander. 1989. Skeletal morphology of an archaic cynipoid, Ibalia rufipes (Hymenoptera: Ibaliidae). Entomologica Scandinavica, Supplement 33:1-60.
rhachis by Miko, I. 2009. -2019 Curator. Hymenoptera Anatomy Ontology.
Comments and tags
alternative definition added about 10 years ago by Andy Deans
The paired ventral ridges of the united second valvulae on which the first valvulae glide.
  Reference: Ronquist, F., and G. Nordlander. 1989. Skeletal morphology of an archaic cynipoid, Ibalia rufipes (Hymenoptera: Ibaliidae). Entomologica Scandinavica, Supplement 33:1-60.
  Cross reference: None provided.


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