Fig. 4 in The earliest known Kinnella, an orthide brachiopod from the Upper Ordovician of Manitoulin Island, Ontario, Canada

Fig. 4. Plot of measurements of 50 conjoined shells of Kinnella laurentiana sp. nov.; Kagawong Submember, upper Georgian Bay Formation, Richmondian (mid−Ashgill), Manitoulin Island. Note the largely isometric shell outline (consistent length/width ratio) and convexity (thickness/width ratio) with ontogeny.