Occurs in rivers, apparently not yet recorded in brackish water. A filter feeder. More data needed .
Dorsal spines (total): 0; Anal spines: 0; Anal soft rays: 17 - 38. Body moderately deep; belly with 18 + 10 or 11 scutes. Mouth small, inferior; lower jaw short. Last dorsal fin ray long, about equal to distance snout tip to about mid-pectoral fin; anal fin long. Scales small, somewhat irregular. A dark spot behind gill opening. Gill rakers fine and numerous.: fusiform / normal; Cross section: compressed.
Behavioural data for Mexican river gizzard shad is currently being reviewed.
Diet information for Mexican river gizzard shad is currently being compiled.
Reproduction data for Mexican river gizzard shad is currently being compiled.
Freshwater; pelagic. Tropical; 21°N - 14°N North America: Mexico (Río Papaloapan in southern Veracruz and Oaxaca) southward to northern Guatemala (Río Ucumacinta basin).
Occurrence records from the Global Biodiversity Information Facility (GBIF) — 23 records indexed .
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