pectoral fin fold

Term ID

ZFA:0005317

Synonyms

• pectoral fin membrane

Definition

The functional webs of the paired fins. They arise as a consequence of apical fold (AER) expansion and of migration of the distal mesenchyme. The fin folds are delimited by a dorsal and a ventral striated epidermis. The cells of the epidermal basal stratum are positioned on a basement membrane. Directly beneath the basement membrane of each side there is an array of actinotrichs, fibers of the extracellular matrix which act as supportive elements of the larval fin folds. (1)

Appears at

Hatching:Pec-fin (60.0h-72.0h)

Evident until

Adult (90d-730d, breeding adult)

References

• TAO:0005317

Ontology

Anatomy Ontology