FB2025_05 , released December 11, 2025
FB2025_05 , released December 11, 2025
CV Term Report
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General Information
Term embryonic/larval fat body ID (Ontology) FBbt:00001704 (Fly Anatomy)
Definition Fully developed fat body of the late embryo (from stage 17 onward) or the larva. It is a bilateral, multilobed organ that extends the length of the insect (Butterworth et al., 1965). It is one cell thick and between one and ten cells wide (Butterworth et al., 1965). Large holes and clefts form during stage 17, giving the fat body its definitive larval form (Campos-Ortega and Hartenstein, 1997).[ FlyBase:FBrf0017184 FlyBase:FBrf0089570 FlyBase:FBrf0238315 ]
Also Known As "larval fat body" ; "larval fatbody"
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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     644
Insertions (FBti)  EXPRESSION_STAGE_TISSUE_POSITION     176
Insertions (FBti)  PHENOTYPE_MANIFEST_IN      52
Constructs (FBtp)  PHENOTYPE_MANIFEST_IN     481
show Full annotation statements including this term (annotations to child terms are NOT included), and relevant FlyBase records
 Full annotation statements 
Relevant FlyBase reports
 Alleles Genes Insertions Constructs
 embryonic/larval fat body (all annotations which use CV term, excluding "NOT" statements)     647    425    227    516
     embryonic/larval fat body | adult stage       2       --       1       --
     embryonic/larval fat body | cell autonomous | larval stage | somatic clone       2       --       --       2
     embryonic/larval fat body | conditional | somatic clone       1       --       --       --
     embryonic/larval fat body | early third instar larval stage      15       --       --      13
     embryonic/larval fat body | early third instar larval stage | calorie restriction conditional       1       --       --       --
     embryonic/larval fat body | embryonic stage       2       --       --       --
     embryonic/larval fat body | larval stage     118       --      16     81
     embryonic/larval fat body | larval stage | nutrition conditional       1       --       --       --
     embryonic/larval fat body | larval stage | somatic clone      26       --       1     23
     embryonic/larval fat body | larval stage | somatic clone | calorie restriction conditional       1       --       --       1
     embryonic/larval fat body | larval stage | somatic clone | conditional      24       --       --      22
     embryonic/larval fat body | larval stage | somatic clone | nutrition conditional       2       --       --       2
     embryonic/larval fat body | late third instar larval stage       3       --       --       3
     embryonic/larval fat body | nutrition conditional       3       --       2       --
     embryonic/larval fat body | prepupal stage       2       --       --       1
     embryonic/larval fat body | pupal stage       2       --       --       2
     embryonic/larval fat body | second instar larval stage       4       --       2      1
     embryonic/larval fat body | second instar larval stage | somatic clone       1       --       --       --
     embryonic/larval fat body | somatic clone      23       --       3     14
     embryonic/larval fat body | somatic clone | calorie restriction conditional       4       --       --       3
     embryonic/larval fat body | somatic clone | third instar larval stage      30       --       1     22
     embryonic/larval fat body | somatic clone | wandering third instar larval stage | nutrition conditional       7       --       --       7
     embryonic/larval fat body | temperature conditional       2       --       --       2
     embryonic/larval fat body | third instar larval stage     268       --       9    238
     embryonic/larval fat body | third instar larval stage | nutrition conditional       2       --       --       2
     embryonic/larval fat body | ventral       1       --       --       --
     embryonic/larval fat body | wandering third instar larval stage      37       --       2     30
     embryonic/larval fat body | wandering third instar larval stage | nutrition conditional       7       --       2       --
Spanning Tree (Parents/Children)
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portion of tissue
 |__fat body___________________________
trunk mesoderm derivative              |
 |__somatic trunk mesoderm derivative__|
                                       embryonic/larval fat body  1863 rec.
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Is a fat body
somatic trunk mesoderm derivative
Develops from fat body primordium
Part of larval adipose system
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