TABLE 3 in Early development of Brachyplatystoma juruense (Boulenger, 1898) (Siluriformes: Pimelodidae)

TABLE 3. Comparative data found during the early development of Brachyplatystoma. Roman numerals identify the spines, Arabic numerals indicate the branched fin rays, myomeres, and proportions. *Characters better observed from the postflexion stage. Data from Lundberg & Akama (2005), Leite et al. (2007) and Silva et al. (2022).
Comparison during the development of Braplyplatystoma species from Amazon basinCharactersB. juruenseB. tigrinumB. vaillantiiB. platynemaB. capapretumB. filamentosumB. rousseauxiiTotal myomeres58–59585061–684743–4446Pre-anal myomeres222518–1922–242117–1819Post-anal myomeres36–373331–3239–44262627Snout shapeRoundedRoundedRounded-Triangular and pointedTriangular and pointedTriangular and pointedInterorbital distance<40%> 40%> 40%-> 40%> 40%> 40%Barbels reach*Long. Maxillary barbels extend beyond the caudal peduncleLong. Maxillary barbels extend beyond the caudal peduncleShort. Maxillary barbels reach at most the end of the anal finShort. Maxillary barbels reach at most the end of the anal finShort. Maxillary barbels reach at most the end of the anal finShort. Maxillary barbels reach at most the end of the anal finShort. Maxillary barbels reach at most the end of the anal finReach of pectoral finEnd of the dorsal finEnd of the dorsal finEnd of the dorsal fin-End of the dorsal finEnd of the dorsal finEarly of the dorsal finAnus reachShort (<50% of SL)Short (<50% of SL)Short (<50% of SL)Long (> 50% of SL)Long (> 50% of SL)Long (> 50% of SL)Long (> 50% of SL)Reach of adipose finHigh (> 30% of SNAN)High (> 30% of SNAN)Low (<30% of SNAN)-Low (<30% of SNAN)Low (<30% of SNAN)Low (<30% of SNAN)Dorsal rays*I,6I,6I,6I,6I,6I,6II,6Anal rays*18181517161519Pectoral rays*I,11I,11I,9I,9I,9I,9I,9