Journal
JOURNAL OF FISH BIOLOGY
Volume 91, Issue 2, Pages 673-678Publisher
WILEY
DOI: 10.1111/jfb.13365
Keywords
asymmetry; Heterenchelyidae; morphology; Pythonichthys
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Morphological asymmetry is described in the heterenchelyid mud eel Pythonichthys cf. macrurus from inshore coastal waters of Guinea, West Africa. The intensity of asymmetry differs between two examined specimens, with the more extreme case exhibiting strong asymmetry in both external and internal features, including unilateral depigmentation, reductive degeneration and embedding of a blind-side eye, skewed jaws with reduced dentition and tooth loss. The extent and nature of asymmetry suggests that this individual probably lived primarily on its left lateral side, not unlike sinistral pleuronectiform flatfishes.
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