. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology; Zoology. Figure 29. Posterodorsal views of the jaw joints of (A) Eocaecilia micropodia (reconstructed primarily from MCZ 9152), (B) Ichthyophis glandulosus (MCZ 14003), and (C) Dermophis mexicanus (MCZ 12121). In each case, the articular surfaces have been separated to show the geometry of the facets. Not to scale. ogneau-Russell (2001: 267) noted most closely resembles the condition of rhina- trematids. In Recent taxa, the relatively short in- ternal process lies below the adductor chamber of the skull and is directe
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology; Zoology. Figure 29. Posterodorsal views of the jaw joints of (A) Eocaecilia micropodia (reconstructed primarily from MCZ 9152), (B) Ichthyophis glandulosus (MCZ 14003), and (C) Dermophis mexicanus (MCZ 12121). In each case, the articular surfaces have been separated to show the geometry of the facets. Not to scale. ogneau-Russell (2001: 267) noted most closely resembles the condition of rhina- trematids. In Recent taxa, the relatively short in- ternal process lies below the adductor chamber of the skull and is directed me- dially, whereas in E. micropodia, the elon- gate internal process must have projected dorsomedially into the adductor chamber, with its distal end extending above the horizontal plane of the quadrate ramus of the pterygoid. The dorsomedial inclination of the internal process is evident in several specimens (Figs. 4B, 13B, C, 251). The de- gree of vertical inclination was probably sufficient to ensure that the process did not overlie the quadrate ramus of the pter- ygoid when the mouth was closed (con- straining mouth gape) and thus could be withdrawn from the adductor fossa when the mouth opened. Nonetheless, the prox- imity of the process to the pterygoid is clearly evidenced by specimens in which the jaws are preserved in articulation with the skull. Typically the pterygoid is broken by compaction across the internal process, an artifact most clearly seen in the type (Fig. 3) and MCZ 9015 (Fig. 13B). The pseudodentary bears two rows of teeth, as in rhinatrematids, typhlonectids, uraeotyphilds, Ichthyophis, and various caeciliids. The pseudodentary teeth of Eocaecilia micropodia, all of which are pedicellate, are more numerous than those in almost any modern caecilian, with the exception of Praslinia cooperi. In most specimens, the pedicels are closely packed, with a few gaps representing an unoccu- pied tooth locus or loci. As in most spec- imens of the upper jaw, no lo
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