. Breviora. 1970 AMAZONIAN CYPRINODONT FISH scales in the "a" position. Some specimens have a small scale an- terior to the h scale. There are a pair of scales on either side of the head over the supraorbital portion of the frontal bone. This is a simphfied pattern similar to that probably found in many unrelated. Fig. 2. Scale pattern on dorsum of head in specimen. forms in which the pattern has been secondarily reduced, including Epiplatys sexjasciatus, young Nothobranchius (or Aphyosemiorf!) sjoestedti, and perhaps young Pantanodon podoxys (Whitehead, 1962, figs. 12 and 13
. Breviora. 1970 AMAZONIAN CYPRINODONT FISH scales in the "a" position. Some specimens have a small scale an- terior to the h scale. There are a pair of scales on either side of the head over the supraorbital portion of the frontal bone. This is a simphfied pattern similar to that probably found in many unrelated. Fig. 2. Scale pattern on dorsum of head in specimen. forms in which the pattern has been secondarily reduced, including Epiplatys sexjasciatus, young Nothobranchius (or Aphyosemiorf!) sjoestedti, and perhaps young Pantanodon podoxys (Whitehead, 1962, figs. 12 and 13). Coloration. The MZUSP lots (including several not Hsted above) I have examined vary from those in which the specimens are rela- tively dark and have markings that stand out to others in which the specimens are quite pale and the markings are washed out. I am fairly confident, however, that all represent the same species. The coloration is sexually dimorphic. In females in all lots there is a more or less sharp demarcation between the relatively dark sides and the light belly, while the fins are clear or slightly dusky, but never have distinct markings. In males, on the other hand, the body is more uniformly colored, the belly about the same color as the sides; the sides usually bear a series of hazy, lozenge-shaped, vertical bars, from two or three restricted to the pectoral region to a dozen or so for the length of the body; the dorsal, anal and caudal fins bear concentrations of melanophores (see Fig. 1). Scant observations were made on coloration in live Fluviphylax during the EPA fieldwork in which I participated, since all were. 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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