Research ArticleORGANISMAL BIOLOGY

# Suspension feeding in the enigmatic Ediacaran organism Tribrachidium demonstrates complexity of Neoproterozoic ecosystems

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Vol. 1, no. 10, e1500800

### Supplementary Materials

Fig. S1. Computational domain for CFD simulations.

Fig. S2. Results of CFD simulations with Tribrachidium oriented at 0° to the current, visualized as two-dimensional plots of flow velocity magnitude with flow vectors (gray arrows; length of arrows proportional to the natural logarithm of the flow velocity magnitude).

Fig. S3. Results of CFD simulations with Tribrachidium oriented at 120° to the current, visualized as two-dimensional plots of flow velocity magnitude with flow vectors (gray arrows; length of arrows proportional to the natural logarithm of the flow velocity magnitude).

Fig. S4. Results of CFD simulations with Tribrachidium oriented at 240° to the current, visualized as two-dimensional plots of flow velocity magnitude with flow vectors (gray arrows; length of arrows proportional to the natural logarithm of the flow velocity magnitude).

Fig. S5. Results of CFD simulations with the null model, visualized as two-dimensional plots of flow velocity magnitude with flow vectors (gray arrows; length of arrows proportional to the natural logarithm of the flow velocity magnitude).

Fig. S6. Comparison of the CFD simulations with different mesh sizes, visualized as two-dimensional plots of flow velocity magnitude with flow vectors (gray arrows; length of arrows proportional to the natural logarithm of the flow velocity magnitude).

Model S1. Digital reconstruction of Tribrachidium in IGES format.

• ## Supplementary Materials

This PDF file includes:

• Fig. S1. Computational domain for CFD simulations.
• Fig. S2. Results of CFD simulations with Tribrachidium oriented at 0° to the current, visualized as two-dimensional plots of flow velocity magnitude with flow vectors (gray arrows; length of arrows proportional to the natural logarithm of the flow velocity magnitude).
• Fig. S3. Results of CFD simulations with Tribrachidium oriented at 120° to the current, visualized as two-dimensional plots of flow velocity magnitude with flow vectors (gray arrows; length of arrows proportional to the natural logarithm of the flow velocity magnitude).
• Fig. S4. Results of CFD simulations with Tribrachidium oriented at 240° to the current, visualized as two-dimensional plots of flow velocity magnitude with flow vectors (gray arrows; length of arrows proportional to the natural logarithm of the flow velocity magnitude).
• Fig. S5. Results of CFD simulations with the null model, visualized as two-dimensional plots of flow velocity magnitude with flow vectors (gray arrows; length of arrows proportional to the natural logarithm of the flow velocity magnitude).
• Fig. S6. Comparison of the CFD simulations with different mesh sizes, visualized as two-dimensional plots of flow velocity magnitude with flow vectors (gray arrows; length of arrows proportional to the natural logarithm of the flow velocity magnitude).