FB2025_05 , released December 11, 2025
FB2025_05 , released December 11, 2025
CV Term Report
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General Information
Term embryonic/larval crystal cell ID (Ontology) FBbt:00001690 (Fly Anatomy)
Definition Hemocyte of the embryo and larva. A cell that is slightly larger than the plasmatocytes and is distinguished by containing large crystalline inclusions of prophenol oxidase that are not membrane bound (Brehelin, 1982). Crystal cells represent less than 5% of all mature larval hemocytes. They are non-phagocytic cells that facilitate innate immune and wound-healing responses by mediating the process of melanization.[ FlyBase:FBrf0031012 FlyBase:FBrf0035582 FlyBase:FBrf0037631 FlyBase:FBrf0074444 FlyBase:FBrf0085863 FlyBase:FBrf0134542 FlyBase:FBrf0228946 ]
Also Known As "Oe" ; "oenocytoid"
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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     263
Insertions (FBti)  EXPRESSION_STAGE_TISSUE_POSITION       1
Insertions (FBti)  PHENOTYPE_MANIFEST_IN      67
Constructs (FBtp)  PHENOTYPE_MANIFEST_IN     124
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 crystal cell (all annotations which use CV term, excluding "NOT" statements)     266    117      8     67    132
     embryonic/larval crystal cell | cell non-autonomous | larval stage | somatic clone       1       --       --       --       1
     embryonic/larval crystal cell | decreased number | embryonic stage       2       --       --       2       --
     embryonic/larval crystal cell | decreased number | larval stage      19       --       --       4     11
     embryonic/larval crystal cell | decreased number | third instar larval stage       2       --       --       --       1
     embryonic/larval crystal cell | ectopic      10       --       --       1      8
     embryonic/larval crystal cell | ectopic | somatic clone | third instar larval stage       2       --       --       --       2
     embryonic/larval crystal cell | embryonic stage       5       --       --       --       3
     embryonic/larval crystal cell | embryonic stage 14       1       --       --       1       --
     embryonic/larval crystal cell | embryonic stage 15       2       --       --       --       --
     embryonic/larval crystal cell | embryonic stage | increased number       2       --       --       1      1
     embryonic/larval crystal cell | increased number       5       --       --       --       2
     embryonic/larval crystal cell | increased number | larval stage      54       --       --       4     44
     embryonic/larval crystal cell | increased number | larval stage | conditional       2       --       --       --       2
     embryonic/larval crystal cell | increased number | third instar larval stage       7       --       --       --       4
     embryonic/larval crystal cell | increased number | wandering third instar larval stage       7       --       --       --       4
     embryonic/larval crystal cell | larval stage      14       --       --       1      5
     embryonic/larval crystal cell | larval stage | conditional       2       --       --       --       1
     embryonic/larval crystal cell | larval stage | heat sensitive       5       --       --       --       5
     embryonic/larval crystal cell | larval stage | increased number       1       --       --       --       --
     embryonic/larval crystal cell | third instar larval stage      38       --       --       8     19
     embryonic/larval crystal cell | wandering third instar larval stage       7       --       --       1      3
Spanning Tree (Parents/Children)
Only view relationship:
germ layer derivative
 |__mesodermal derivative______
hemocyte                       |
 |__embryonic/larval hemocyte__|
 |__crystal cell_______________|
                               embryonic/larval crystal cell  590 rec.
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Is a embryonic/larval hemocyte
mesodermal derivative
crystal cell
Develops from procrystal cell
Part of
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Synonyms
Secondary IDs
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CL:0000715