FB2025_05 , released December 11, 2025
FB2025_05 , released December 11, 2025
CV Term Report
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General Information
Term primary lobe of embryonic/larval lymph gland ID (Ontology) FBbt:00001669 (Fly Anatomy)
Definition Anterior-most and largest of the 3-6 lobe pairs of the third instar embryonic/larval lymph gland. These lobes are bulbous. Three distinct zones are identified: the medullary zone in the center, the cortical zone in the periphery and the posterior signaling center. At the late third instar the posterior signaling center functions as a stem-cell niche, the medullary zone contains quiescent prohemocytes, and the cortical zone the proliferating hemocytes (plasmatocytes) and procrystal and crystal cells.[ FlyBase:FBrf0074444 FlyBase:FBrf0187467 FlyBase:FBrf0208762 FlyBase:FBrf0228946 ]
Also Known As "anterior lymph gland pair" ; "primary lymph gland lobe"
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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      50
Insertions (FBti)  EXPRESSION_STAGE_TISSUE_POSITION      12
Insertions (FBti)  PHENOTYPE_MANIFEST_IN       4
Constructs (FBtp)  PHENOTYPE_MANIFEST_IN      31
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Relevant FlyBase reports
 Alleles Genes Insertions Constructs
 primary lobe of embryonic/larval lymph gland (all annotations which use CV term, excluding "NOT" statements)      50      2     16     35
     primary lobe of embryonic/larval lymph gland | absent | larval stage       1       --       --       --
     primary lobe of embryonic/larval lymph gland | larval stage      24       --       2     17
     primary lobe of embryonic/larval lymph gland | larval stage | somatic clone - tissue specific       1       --       --       --
     primary lobe of embryonic/larval lymph gland | somatic clone | third instar larval stage       2       --       --       2
     primary lobe of embryonic/larval lymph gland | third instar larval stage      19       --       --      13
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multi-tissue structure_____
trunk mesoderm derivative__|
                           embryonic/larval lymph gland
                            |__primary lobe of embryonic/larval lymph gland  226 rec.
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Is a embryonic/larval lymph gland
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