. Breviora. Zoology; Paleontology. 2011 SMALLER EMBOLOMERES FROM OHIO A. Figure 3. Archeriid. Photographs of latex peals. A, original surface of main block (MCZ 2161) showing ventral surface of gastralia. B, anterior end of lower jaw, medial aspect (MCZ 2293). C, anterior end of lower jaw, lateral aspect, after acid etching (MCZ 2293). Scale bars are divided into 1-cm sections. zontal, as in Archeria. The articular bears a boss posterior to the glenoid, as in Proter- ogyrinus (Holmes, 1984) and Archeria (Holmes, 1989). The posterior portion of a large posterior Meckelian fenestra is clearly vi
. Breviora. Zoology; Paleontology. 2011 SMALLER EMBOLOMERES FROM OHIO A. Figure 3. Archeriid. Photographs of latex peals. A, original surface of main block (MCZ 2161) showing ventral surface of gastralia. B, anterior end of lower jaw, medial aspect (MCZ 2293). C, anterior end of lower jaw, lateral aspect, after acid etching (MCZ 2293). Scale bars are divided into 1-cm sections. zontal, as in Archeria. The articular bears a boss posterior to the glenoid, as in Proter- ogyrinus (Holmes, 1984) and Archeria (Holmes, 1989). The posterior portion of a large posterior Meckelian fenestra is clearly visible (Figs. IB, 2A). The anterior end of a left lower jaw ramus (MCZ 2293) is preserved in both lateral and medial view (Figs. 2B, C, 3B, C). Although not collected with the main block, its small size and association with embolomerous centra suggest that it pertains to the same taxon. It appears to have been from an individual of about the same size as MCZ 2161; the complete jaws would have been no more than 100 mm long. This indicates that the complete skull would have had a midsagittal length (the postparietal length— see Panchen, 1970) of between 85 and 100 mm if skull proportions of embolomeres such as Proterogyrinus (Holmes, 1984) or Archeria (Holmes, 1989) are assumed. The dermal ornamentation, seen on the lateral surface of the anterior jaw portion (MCZ 2293; Figs. 2C, 3C), is muted as in other embolomeres. The preserved dentary bears 13 small teeth of equal size. As in Archeria, the anterior and posterior margins of the teeth are parallel (, the tooth is not tapered), and the blunt terminations appear to be chisel-shaped, although poor preserva- tion precludes more detailed comparisons. This morphology is distinct from that seen in Leptophractus (Cope, 1875; Romer, 1963), also found at Linton, in which the teeth show marked variation in size and shape and are. Please note that these images are extracted from scanned page images that may have been digitally enhanc
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