FB2025_05 , released December 11, 2025
FB2025_05 , released December 11, 2025
CV Term Report
Help Close All Open All
General Information
Term medulla layer M1 ID (Ontology) FBbt:00003750 (Fly Anatomy)
Definition Distal-most layer of the medulla. It is defined by the distal extent of the distal lamina monopolar neuron L1 arborization (Fischbach and Dittrich, 1989).[ FlyBase:FBrf0049410 FlyBase:FBrf0205531 FlyBase:FBrf0224194 ]
Also Known As "stratum M1"
Comment In the literature there are two methods for describing spatial location of neurons in the visual system: distal-proximal (e.g. Fischbach and Dittrich, 1989), and medial-lateral (e.g. Ito et al., 2014), both meaning outer and inner, and refer to the distance of a structure along the visual pathway relative to the center of the brain. Currently we will adopt the classical 'distal-proximal'.
Links to External Ontologies
VFB:FBbt_00003750
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       9
Insertions (FBti)  PHENOTYPE_MANIFEST_IN       1
Constructs (FBtp)  PHENOTYPE_MANIFEST_IN       7
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
 medulla layer M1 (all annotations which use CV term, excluding "NOT" statements)       9      2      1     12
     medulla layer M1 | adult stage | somatic clone       4       --       1       --
Spanning Tree (Parents/Children)
Only view relationship:
  synaptic neuropil layer
   |__medulla layer
       |__medulla layer M1  24 rec.
Spanning Tree View Settings
Parents/Children
View Depth
Show hierarchy levels: for parents, for children
hide Relationships
Is a medulla layer
Part of outer medulla
hide Synonyms & Secondary IDs
Synonyms
Secondary IDs
hide External Crossreferences & Linkouts
VFB:FBbt_00003750