Fig. 3 in Silicified Leptodesma (Bivalvia; Pteriomorphia) from the Texas Permian

Fig. 3. Leptodesma falcata Boyd and Newell, new species, SEM views of three silicified LVs, USNM loc. 703c. Secondary electron images acquired from carbon­coated specimens. a. Duplivincular ligament area; note tiny resiliferlike pit (arrow) beneath beak; cardinal teeth broken; USNM 431330; b. Hinge area, tilted slightly to emphasize two cardinal teeth and posterior lateral tooth; USMN 431331; c. Cardinal area with few ligament grooves but full complement of teeth; USNM 431332.