. Breviora. 16 BREVIORA WULOPOIDEI" No. 487 CTENOSQUAMATA O^ cf <** C^ <* ^. Figure 8. Cladogram of eurpterygian relationships, incorporating the results of the present study. Characters are the presence of: 1) A small obliquely aligned basi- hyal bone; 2) A thick well-developed gular fold; 3) A "keyhole" shaped aphakic space; 4) A peculiar scale pocket morphology and pigmentation; A) See Rosen (1985) for synapomorphies uniting the Aulopoidei with the Ctenosquamata; B) See Stiassny (1986) for synapomorphies uniting Aulopus, Chlorophthalmus and Parasudis with the Ctenosquam
. Breviora. 16 BREVIORA WULOPOIDEI" No. 487 CTENOSQUAMATA O^ cf <** C^ <* ^. Figure 8. Cladogram of eurpterygian relationships, incorporating the results of the present study. Characters are the presence of: 1) A small obliquely aligned basi- hyal bone; 2) A thick well-developed gular fold; 3) A "keyhole" shaped aphakic space; 4) A peculiar scale pocket morphology and pigmentation; A) See Rosen (1985) for synapomorphies uniting the Aulopoidei with the Ctenosquamata; B) See Stiassny (1986) for synapomorphies uniting Aulopus, Chlorophthalmus and Parasudis with the Ctenosquamata; C) See Lauder and Liem (1983) for synapomorphies uniting the Ctenosquamata. Note: Following Rosen (1973), "other aulopoids" are the Bathy- sauridae and Notosudidae. "Other Ipnopidae" are Bathypterois, Bathytyphlops, Bathymicrops and Ipnops. Significance of the Rostral Cartilage Given this admittedly tentative scheme of relationships for the chlorophthalmids, it is extremely interesting to note the highly var- ied condition of the so-called "rostral cartilage" in these and in other aulopiform taxa. The "rostral cartilage" of both larval and adult Parasudis is a single median structure which is bound by a well- developed ethmo-rostroid ligament to both the ethmoid and pre- maxillae (Figs. 9 A, B). The attachment of the cartilage to the ethmoid is strong in the larval fish and becomes weaker with growth. In. 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. , Museum of Comparative Zoology, Harvard University
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