A shot in the dark: Comparative morphology of the bioluminescent tube organs in tubeshoulders (Platytroctidae)
Fig 4
Longitudinal sections of the postcleithral tube organ.
(A and B) Normichthys yahganorum (SIO 61-45), (C) Normichthys operosus (MCZ 163242), (D) Holtbyrnia melanocephala (LACM 31065-9), (E) Mentodus facilis (LACM 9706-42), (F) Platytroctes apus (SIO 77-54), and (G) Sagamichthys abei (SIO 18-4). Anterior is to the left in all figure panels, such that the posteriorly-directed terminal opening of the tube organ is to the right. Abbreviations: scale (s), dermis (d), tube organ (t), pigment layer (pl), modified scale (ms), luminescent fluid (lf), muscle (m), blood vessel (v), potential developing luminescent-fluid cells (*). Arrow in panel B points towards terminal tube opening.