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Building Finite Element Models to Investigate Zebrafish Jaw Biomechanics
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Functional Morphology of Eunicidan (Polychaeta) Jaws.

W Cyrus Clemo, Kelly M Dorgan

    The Biological Bulletin
    |March 20, 2018
    PubMed
    Summary

    Polychaete jaw structure and function vary with diet. Comparing herbivorous Diopatra spp. and carnivorous Lumbrineris spp. reveals how jaw morphology relates to feeding behavior and ecological roles in annelid communities.

    Area of Science:

    • Marine Biology
    • Paleontology
    • Functional Morphology

    Background:

    • Polychaetes, segmented worms, display diverse feeding mechanisms, including complex jaw structures in the order Eunicida.
    • Eunicidan jaws, composed of maxillae and mandibles, show significant variation used for inferring evolutionary relationships.
    • The link between Eunicidan jaw functional morphology, feeding behavior, and diet remains underexplored.

    Purpose of the Study:

    • To investigate the relationship between jaw morphology, kinematics, and diet in two distantly related Eunicida taxa.
    • To compare the jaw functional morphology and feeding behavior of herbivorous Diopatra spp. (Onuphidae) and carnivorous Lumbrineris spp. (Lumbrineridae).

    Main Methods:

    • Filming polychaetes biting in various orientations to observe jaw kinematics.
    Keywords:
    AL, attachment lamellae; MI–MIV, maxillae I–IV

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  • Comparing jaw morphology and kinematics between Diopatra spp. and Lumbrineris spp.

    • Main Results:

    • Observed differences in jaw structure and kinematics between Diopatra spp. and Lumbrineris spp. correlate with their distinct diets.
    • The study provides insights into how jaw morphology can be linked to feeding strategies.

    Conclusions:

    • Jaw functional morphology is closely related to diet in polychaetes.
    • Understanding these relationships can enhance interpretations of fossil polychaete jaw elements (scolecodonts) and their ecological roles in ancient annelid communities.