Fishes from the Río Alvarado drainage, Upper Río Magdalena Basin, Colombia Albornoz-Garzón, Juan G. Conde-Saldaña, Cristhian C. López-Delgado, Edwin O. García-Melo, Jorge E. Villa-Navarro, Francisco A. Check List 2020 2020-09-18 16 5 1181 1198 X2 7991 [810,982,768,792] Actinopterygii Animalia Characiformes 12 1193 Chordata order     1 Upper lip present; premaxilla with conical or multi- cuspid teeth ...............................................................2  1′ Upper lip absent; premaxilla with spatulate teeth ..... ....... Parodontidae:  Parodon magdalenensis( Fig. 2C)   2 Pectoral-fin with one unbranched ray .......................3  2′ Pectoral-fin with two or more unbranched rays.......... Crenuchidae:  Characidium phoxocephalum( Fig. 2A)   3 Adipose fin present; caudal fin not rounded ............... .............................................................. Characidae: 4  3′ Adipose fin absent; caudal fin rounded....................... ............ Erythrinidae:  Hoplias malabaricus( Fig. 2B)   4 Mouth without external teeth on premaxilla ............5  4′ Mouth with external teeth on premaxilla ................... .............................................  Roeboides dayi( Fig. 2L)   5 Mouth with four teeth on inner premaxillary row; fins usually yellowish or dark ..........................................6  5′ Mouth with five teeth on inner premaxillary row; fins usually reddish ........................  Astyanaxsp.( Fig. 2D)   6 Mouth subterminal; anal fin with 13 or fewer branched rays ............................................................................7  6′ Mouth terminal or superior; anal fin with more than 13 branched rays...................................................... 10   7 Mouth with three irregular rows of premaxillary teeth ...........................................................................8  7′ Mouth with two rows of premaxillary teeth ............... ......................................  Microgenys minuta( Fig. 2K)   8 Eye diameter less than 26.8% of head length; third infraorbital not in contact with preopercle ................. ......................................  Creagrutus dulima( Fig. 2G)  8′ Eye diameter more than 27.2% of head length; third infraorbital in contact with preopercle .....................9   9 Middle caudal-fin rays with dark stripe; humeral blotch vertically elongated; anal fin usually with 11 to 13 branched rays.............  Creagrutus affinis( Fig. 2F)  9′ Middle caudal-fin rays without dark stripe; humeralblotch ovoid; anal fin usually with 9 to 11 branched rays .......................  Creagrutus magdalenae( Fig. 2H)    10 Mouth superior; dorsal-fin origin behind anal-fin ori- gin...................  Gephyrocharax melanocheir( Fig. 2I)  10′ Mouth terminal; dorsal-fin origin anterior to anal-fin origin ....................................................................... 11   11 Anal fin with more than 30 branched rays; caudal fin without horizontal dark stripe; males with a pouch of scales at base of caudal fin .......................................... ..........................  Argopleura magdalenensis( Fig. 2E)  11′ Anal fin with less than 30 branched rays; caudal fin with horizontal dark stripe; males without a pouch of scales at base of caudal fin ....  Hemibryconsp.( Fig. 2J)