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Key to the speciesKey to the species of Apistoloricaria based on description of A. laani, A. listrorhinos and A. ommation NJISSEN & ISBRÜCKER, 1988. | ||
| 1a. | Rostrum relative short, 1.9-2.2 of head length |
> 2 < |
| 1b. | Rostrum relative long, around 1.6 of head length | |
| 2a. | Eyes relative large, 5.3-7.0 of head length in diameter |
> 3 < |
| 2b. | Eyes relative small, around 9.4 of head length in diameter | |
| 3a. |
Spines of dorsal and pectoral fins without filamentous elongation; length of dorsal fin spine 4.3-4.7 of SL; length of pectoral fin spine 4.3-4.7 of SL |
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| 3b. | Spines of dorsal and pectoral fins with filamentous elongations; length of dorsal fin spine 2.2-2.8 of SL; length of pectoral fin spine 2.9-3.7 of SL | |
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