. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. EcuADOREAx Glaxdulocaudine Fishes • Robcrts 501. lateral ethmoid supi-aoccipital epiotic parietal pterotic Figure 10. Landonia lotidens. Dorsal view of cranium ( specimen). Eigenmann (1922) reported Fhenacohnj- con henni from 46 to 53 mm and Landonia latidens from 28 to 59 mm (total length?). In tlu> material collected by SiKa, Gilbert, and nuself in 1971 PJicnacoJ)rycon are from to mm in standard length, and the Landonia significanth- larger, trom to mm in standard length. In both Vhenuc
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. EcuADOREAx Glaxdulocaudine Fishes • Robcrts 501. lateral ethmoid supi-aoccipital epiotic parietal pterotic Figure 10. Landonia lotidens. Dorsal view of cranium ( specimen). Eigenmann (1922) reported Fhenacohnj- con henni from 46 to 53 mm and Landonia latidens from 28 to 59 mm (total length?). In tlu> material collected by SiKa, Gilbert, and nuself in 1971 PJicnacoJ)rycon are from to mm in standard length, and the Landonia significanth- larger, trom to mm in standard length. In both Vhenucohnjcon and Landonia (and probably in Jotahrijcon) the largest speci- mens in a population are females. Males with sexualh' dimorphic characters full)' dexeloped are known from mm (MCZ 48660) to 50 mm (total length?) in Phenacobrycon and from mm (MCZ 48664) to 50 mm (total length?) in Landonia. It may be recalled that the largest specimen of lotahnjcon is a mm female, the males ranging from to mm. ECOLOGY Habitat. lotabnjcon was found in a single localit)': a large, isolated dry-season pool in the Rio Nuevo a few hundred yards from where it flows into the Rio Vinces. A shaded arm of this pool, about 5 meters orbitosphenoid rhinosphenoid hyomandibular antorbital premaxillary raajdllarv opercle. 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. : The Museum
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