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General Information
Term	embryonic/larval posterior spiracle	ID (Ontology)	FBbt:00000424 (Fly Anatomy)
Definition	The main spiracle of the larva on the dorsal side of the eight (last) abdominal segment. During the first larval instar it is the only functional spiracle of the larva. A bilateral pair of these spiracles is housed in a bilateral pair of integumentary specializations - the stigmatophores. Each consists of a plate containing the spiracular openings. These connect to a spiracular chamber which in turn connects to the posterior end of the dorsal trunk. In the second instar there are three ovoid openings on the stigmatic plate and four alternating tufts of slightly branched hairs. In the third instar, the spiracles are somewhat larger and the hairs more markedly branched.[ FlyBase:FBrf0034081 FlyBase:FBrf0064787 ]
Also Known As	"larval posterior spiracle"
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Annotations
Records annotated with this term OR any of its CHILD TERMS
Records annotated with this exact term (annotations to child terms are NOT included)
Data Class Field Records Alleles (FBal)  PHENOTYPE_MANIFEST_IN     109 Insertions (FBti)  EXPRESSION_STAGE_TISSUE_POSITION      69 Insertions (FBti)  PHENOTYPE_MANIFEST_IN      16 Constructs (FBtp)  PHENOTYPE_MANIFEST_IN      31
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Full annotation statements   Alleles  Genes  Images  Insertions  Constructs  embryonic/larval posterior spiracle (all annotations which use CV term, excluding "NOT" statements)     109     258       2      85      39      embryonic/larval posterior spiracle | ectopic       3       --       --       --       1      embryonic/larval posterior spiracle | embryonic stage      23       --       --       --       --      embryonic/larval posterior spiracle | embryonic stage | maternal effect       1       --       --       --       --      embryonic/larval posterior spiracle | first instar larval stage       2       --       --       --       --      embryonic/larval posterior spiracle | germline clone       1       --       --       1       --      embryonic/larval posterior spiracle | heat sensitive       2       --       --       --       1      embryonic/larval posterior spiracle | larval stage      26       --       --       2      23      embryonic/larval posterior spiracle | late embryonic stage       2       --       --       --       --      embryonic/larval posterior spiracle | maternal effect       3       --       --       --       --

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Is a	embryonic/larval spiracle
Develops from	posterior spiracle primordium
Part of	stigmatophore
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Synonyms
	"larval posterior spiracle" EXACT
Secondary IDs
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