Ameca Chub

24-25 transverse scales (rarely 26); 14 upperrow scales (occasionally 13 or 15); 14-19 pores in the infraorbital head sensory canal (usually 15-16). Body is divided dorsoventrally into 4 pigmentation zones as follows: a dark dorsal region; a light band equal to or greater than the width of the pupil; a prominent dark lateral stripe along body, considerably narrower at the anterior region just before the opercular opening; and a silver ventral region. Black spot at the base of caudal fi n set off from lateral stripe by a constriction of the pigment band, the spot extending out onto median caudal interradial membranes. Lateral line pigmented, edged by high concentrations of melanophores around scale pores (Ref. 82373).

Algansea amecae, the Ameca chub, is a species of freshwater fish in the family Cyprinidae. It is endemic to the upper Ameca River basin in Jalisco, western Mexico. It grows to about 10 cm (4 in) in standard length.