Using lapillus otolith shape for generic and species identification of NE Pacific Ariidae

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bekateen
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Using lapillus otolith shape for generic and species identification of NE Pacific Ariidae

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Arroyo‐Zúñiga, K. I., Pacheco‐Ovando, R., Granados‐Amores, E., Granados‐Amores, J., González Ramírez, J., & Díaz‐Santana‐Iturrios, M. (2022). Lapillus otolith shape, a useful taxonomic feature for the identification of sea catfishes (Ariidae: Siluriformes) from the north eastern Pacific. Journal of Fish Biology.

https://doi.org/10.1111/jfb.15198
https://onlinelibrary.wiley.com/doi/abs ... /jfb.15198
Abstract
Otolith shape is widely used as a taxonomic feature in fish systematics. In Siluriformes, the lapillus otolith is the most relevant character for taxonomic purposes, although its discriminant potential has not been assessed quantitatively. Our study model representing Siluriformes were sea catfishes of the family Ariidae from the north eastern Pacific, a taxon with increased taxonomic complexity. The lapillus otolith shape obtained by geometric morphometrics showed high discrimination potential both at the genus and species levels with an overall classification accuracy of ≈93% (K=0.92). Due to the strong species delimitation exhibited by lapillus otolith shape, the descriptions and identification keys provided here are the most useful materials to recognize the eight sea catfish species evaluated. The shared similarities in lapillus otolith shape among species seem to be more influenced by phylogenetic relationships than other factors such as habitat. The lapillus otolith shape is the most powerful taxonomic feature for the identification of sea catfishes from the north eastern Pacific discovered so far.
Key Words: Geometric morphometrics, Marine catfish, Morphology, Species identification, Statoconium.
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bekateen
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Joined: Tue Sep 09, 2014 5:50 pm
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Re: Using lapillus otolith shape for generic and species identification of NE Pacific Ariidae

Post by bekateen »

From Arroyo‐Zúñiga, K. I., Pacheco‐Ovando, R., Granados‐Amores, E., Granados‐Amores, J., González Ramírez, J., & Díaz‐Santana‐Iturrios, M. (2022). Journal of Fish Biology. https://doi.org/10.1111/jfb.15198.

Key to the genera
  • 1a Anterior edge compressed posteriorly .…. 2
    • 1b Anterior edge extended anteriorly .…. 4
  • 2a Linea basalis compressed superiorly .…. 3
    • 2b Linea basalis slightly extended posteriorly .…. Bagre
  • 3a Superior edge compressed posteriorly; posterior edge compressed superiorly .…. Ariopsis
    • 3b Superior edge extended posteriorly; posterior edge compressed anteriorly .…. Occidentarius
  • 4a Antirostrum compressed posteriorly; rostrum compressed posteriorly; mesial inward curve compressed superiorly; mesial notch extended anteriorly .…. Cathorops
    • 4b Antirostrum extended anteriorly; rostrum slightly compressed superiorly; mesial inward curve very slightly compressed anteriorly; mesial notch extended basally .…. Notarius
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