. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology; Zoology. 316 Bulletin Museum of Comparative Zoology, Vol. 158, No. 6. Figure 21. Reconstruction of the right stapes-quadrate of Eocaecilia micropodia based on MCZ 9169 and MNA V8066, V9346. (A) dorsal, (B) ventral, (C) lateral, (D) medial, (E) anterior views (E drawn from MNA V8059). frequency vibrations (Wever, 1975; Wever and Gans, 1976). Operculum. An ossicle is preserved with several specimens, either in proximity to the fenestra ovalis or stapes-quadrate, or in isolation. In MCZ 9242 (op, Fig. 12) and MNA V8054 (
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology; Zoology. 316 Bulletin Museum of Comparative Zoology, Vol. 158, No. 6. Figure 21. Reconstruction of the right stapes-quadrate of Eocaecilia micropodia based on MCZ 9169 and MNA V8066, V9346. (A) dorsal, (B) ventral, (C) lateral, (D) medial, (E) anterior views (E drawn from MNA V8059). frequency vibrations (Wever, 1975; Wever and Gans, 1976). Operculum. An ossicle is preserved with several specimens, either in proximity to the fenestra ovalis or stapes-quadrate, or in isolation. In MCZ 9242 (op, Fig. 12) and MNA V8054 (Fig. 25G) the ossicle is a thin, oval plate resting against the stapes- quadrate. The medial surface facing the fenestra ovalis is concave. In both MCZ 9242 (Fig. 12) and the holotype, the edges are thickened, as in the case of gymno- phionan stapedial footplates that articulate with the margins of a fenestra ovalis (Fig. 22). In MCZ 9156 (Fig. 9), the ossicle lies against the retroarticular process, close to the jaw articulation. In the holotype (Fig. 3), the ossicle appears to have been turned outward and lies immediately adjacent to the fenestra ovalis. The variable positions in which the ossicle is preserved are evi- dence that this element was not rigidly at- tached but presumably was anchored by soft tissue. In MCZ 9169 (Fig. 15C), how- ever, the ossicle was exposed by removal of the stapes and, although fragmented, was found to be closely associated with the fenestra ovalis; the reconstructed shape of the ossicle is an elongate oval that would have occupied most or all of the fenestra ovalis, the margins of which are well pre- Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Harvard University. Museum of Comparative Zoology. Cambridge, Mass. : The Museum
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