Photographed images of the posterior adductor muscles of Atrina pectina (A, B, C), Atrina inflata (D, E, F), and Atrina vexillum (G, H, I) collected from northern Iloilo, Philippines.

 
 
  Part of: Jela C, Monteclaro HM, AƱasco NC, Quinitio GF, Babaran RP (2024) Identification of pen shells (Bivalvia: Ostreida: Pinnidae) collected off northern Iloilo, Philippines using their morphological characters. Acta Ichthyologica et Piscatoria 54: 49-61. https://doi.org/10.3897/aiep.54.112465