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21 Cards in this Set

  • Front
  • Back
Pectoral fin muscles-extensor or abductor
Origin: Scapular process and adjacent fascia
Insertion: Basal and radial pterygiophores
Action: Extends or abducts (elevates) the pectoral fin
Pectoral fin muscles-flexor or adductor
Origin: Coracoid portion of the scapulocoracoid bar
Insertion: Basal and radial pterygiophores
Action: Flexes or adducts (depresses) the pectoral fin
Pelvic fin muscles-extensor or abductor
Origin: From the trunk myomeres, iliac process of puboischiadic bar and metapterygium
Insertion: Pterygiophores; in males, slips of the muscles extend onto the surface of the clasper and insert there
Action: Extends or abducts (elevates) the pelvic fin; in males, the slips inserted on the clasper move that organ during copulation
Pelvic fin muscles-flexor or adductor
Origin: Proximal portion: linea alba and puboischiadic bar. Distal portion: metapterygium
Insertion: Proximal portion: metapterygium. Distal portion: pterygiophores
Action: Flexes or adducts (depresses) the pelvic fin
Levator palatoquadrati
Origin: Otic capsule
Insertion: Palatoquadrate
Action: Elevates the palatoquadrate (upper jaw)
Spiracularis
Origin: Otic capusule
Insertion: Palatoquadrate cartilage
Action: Elevates the palatoquadrate
Adductor mandibulae
Origin: Posterior portion of palatoquadrate
Inserton: Meckel's cartilage
Action: Elevates Meckel's cartilage (closes jaw)
Preorbitalis
Origin: Ventral surface of the chondrocranium
Insertion: Joins the adductor mandibulae muscle and with it inserts on Meckel's cartilage
Action: Elevates Meckel's cartilage
Intermandibularis
Origin: Meckel's cartilage
Insertion: Midventral connective tissue raphe
Action: Elevates the floor of the mouth, thereby reducing the volume of the oral cavity
Interhyoideus
Origin: Ceratohyal
Insertion: Midventral raphe
Action: Compresses gill pouches
Cucullaris
Origin: Fascia of the epaxial muscles
Insertion: Scapular process of the scapulocoracoid bar
Action: Elevates the scapular process
Levator hyomandibulae
Origin: Otic capsule
Insertion: Hyomandibular cartilage
Action: Compresses gill pouches
Dorsal interarcual
Origin: Pharyngobranchial cartilage
Insertion: Adjacent posterior pharyngobranchial cartilage
Action: Pulls gill arches anteriorly
Lateral interarcual
Origin: Pharyngobranchial cartilage
Insertion: Epibranchial cartilage of the same arch
Action: Adducts the cartilages, reducing the angle between them
Branchial adductor
Origin: Epibranchial cartilage
Insertion: Ceratobranchial cartilage of the same arch
Action: Adducts the cartilages reducing the angle between them
Interbranchial
Origin: Gill ray
Insertion: Gill ray
Action: Adducts the cartilages of the gill arch
Superficial dorsal and ventral constrictors
Origin: Raphe
Insertion: Raphe
Action: Compression of the gill pouches
Coracomandibularis
Origin: Fascia of coracoarcual muscle
Insertion: Meckel's cartilage
Action: Depresses lower jaw (opens mouth)
Coracoarcual
Origin: Coracoid portion of the scapulocoracoid bar
Insertion: Coracohyoid muscle
Action: Assists in depressing lower jaw (opens mouth)
Coracohyoid
Origin: Coracoarcual muscle
Insertion: Basihyal cartilage
Action: Assists in depressing the lower jaw (opens mouth)
Coracobranchial
Origin: Coracoid portion of the scapulocoracoid bar and fascia of the dorsal surface of the coracoarcual muscle
Insertion: Hypobranchial cartilages
Action: Depresses the lower jaw (opens mouth) and stabilizes the pericardial cavity