. Bonner zoologische Beiträge : Herausgeber: Zoologisches Forschungsinstitut und Museum Alexander Koenig, Bonn. Biology; Zoology. 280 I. J. H. Isbriicker Bonn, zool. Beitr. pelvic spine. Dorsal fin , last ray split to its base. Anal fin , last ray split to its base. Pectoral fin Pelvic fin Principal caudal spines and rays Two long rictal barbels with (left) eighteen and (right) twenty subbarbels of various lengths, long barbel partly uniting upper and lower lips. Nine- teen short barbels on upper lip and on inner edge of mouth. Twenty-two barbels on posterior border of
. Bonner zoologische Beiträge : Herausgeber: Zoologisches Forschungsinstitut und Museum Alexander Koenig, Bonn. Biology; Zoology. 280 I. J. H. Isbriicker Bonn, zool. Beitr. pelvic spine. Dorsal fin , last ray split to its base. Anal fin , last ray split to its base. Pectoral fin Pelvic fin Principal caudal spines and rays Two long rictal barbels with (left) eighteen and (right) twenty subbarbels of various lengths, long barbel partly uniting upper and lower lips. Nine- teen short barbels on upper lip and on inner edge of mouth. Twenty-two barbels on posterior border of strongly papillated lower lip, each barbel. 6 7 8 Fig. 6. Pseudohemiodon (Planiloricaria) cryptodon new species, ventral region of holotype. Fig. 7. Pseudohemiodon (PlanHoricaria) cryptodon new species, structure of denticles along lateral body scutes of holotype. Fig. 8. Pseudohemiodon (Planiloricaria) cryptodon new species, close-up of inter- orbital area of holotype. with numerous small subbarbels and papillae. No teeth in upper jaws; three^) small, simple, spoonshaped teeth in each lower jaw; teeth hidden in "gums" (hence the specific name). Teeth in the left jaw removed for examination. Eye oval of shape, pupil without a flap. No orbital notch. A row of small, lanceolate denticles laterally along body scutes, where these curve ventrally. A second row of denticles dorsal to first row on same series of scutes, parallel with first row from nineteenth scute on right side and from eighteenth scute on left side, to caudal fin. Similar, though shorter denticles -) Kner (1854, —80), under his description of Loricaria macrodon, sug- gested the presence of replacement teeth in that species. It is guite possible that this phenomenon occurs freguently with loricariid 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 re
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