. Breviora. 14 BREVIORA No. 487. Figure 7. Basihyal and associated structures in adult (A) Bathypterois (MCZ 57624). (B) Chlorophthalmus (MCZ 41444). (C) Parasudis (MCZ 40561). Abbreviations: Bbl-2, basibranchials 12; Bhy, basihyal; Cbl, ceratobranchi- al 1. terms which apply equally to Bathysauropsis and the ipnopids: "Branchiostegal membranes broad and separate from one another and from the isthmus, overlapping anteriorly, and crossed near the tip of the jaw by a thick but narrow gular ; This morphology appears to be unique among aulopiforms and although a poorly developed g
. Breviora. 14 BREVIORA No. 487. Figure 7. Basihyal and associated structures in adult (A) Bathypterois (MCZ 57624). (B) Chlorophthalmus (MCZ 41444). (C) Parasudis (MCZ 40561). Abbreviations: Bbl-2, basibranchials 12; Bhy, basihyal; Cbl, ceratobranchi- al 1. terms which apply equally to Bathysauropsis and the ipnopids: "Branchiostegal membranes broad and separate from one another and from the isthmus, overlapping anteriorly, and crossed near the tip of the jaw by a thick but narrow gular ; This morphology appears to be unique among aulopiforms and although a poorly developed gular fold is present in some stomiiform fishes (, Gonostoma and Polymetme) it is not as elaborate as that found in Bathysauropsis and the ipnopids. Chlorophthalmus shares with Parasudis the pigmented scale pocket skin flap character. In Parasudis the dorsal and ventral scale rows converge rostrad, "herringbone" fashion, upon the lateral line (Mead 1966; Fig. 47), while in Chlorophthalmus, dorsal and ventral scale rows diverge from the midline resulting in a slightly "zig-zag" pattern (Mead 1966; Fig. 46). This highly distinctive feature of squamation is unique to Parasudis and Chlorophthalmus, and is here interpreted as a synapomorphy uniting the two genera. In the eyes of adult Chlorophthalmus (Theisen 1965; Fig. 3), as well as in adult Parasudis, a "keyhole" shaped aphakic space is present. Although well-developed aphakic spaces are not uncom- mon to the eyes of many benthic marine fishes (Munk 1966; Mar- shall 1971), a "keyhole" shaped space is restricted to adults of these. 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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