FIGURE 1. Geological map of the Huehuetla quarry, Puebla, Mexico. In this work this map includes the surrounding area of this quarry as a Turonian outcrop deposit belonging to the Agua Nueva Formation (modified from Servicio Geológico Mexicano, 2004).

FIGURE 2. IGM 6618, Nursallia cf. N. tethysensis from Huehuetla quarry, Puebla, Mexico. Abbreviations: af, anal fin.

FIGURE 3. Specimens of the family Clupeidae recovered in the Huehuetla quarry, Puebla, Mexico. 1, IGM 6626; 2, IGM 7781. Abbreviations: absc, abdominal scute; pcl, postcleithrum; pdsc, predorsal scute; rec, recessus lateralis.

FIGURE 4. IGM 8990, Goulmimichthys roberti from the Huehuetla quarry, Puebla, Mexico. 1, complete specimen; 2, closeup of the pelvic fin coated with ammonium citrate. Abbreviations: af, anal fin; ap, anterior process of the pelvic bone; df, dorsal fin; lp, lateral process of the pelvic bone; pb, pelvic bone; pvf, pelvic fin; pvfr, pelvic fin ray.

FIGURE 5. Hastichthys sp. from the Huehuetla quarry, Puebla, Mexico. 1, IGM 7969, a complete specimen; 2, IGM 7970, a specimen showing bones of the head and some vertebrae; 3, closeup of the lower jaw (= square in 2); 4, closeup of the caudal fin (= square in 1). Abbreviations: den, dentary; df, dorsal fin; h, hypural; pmx, premaxilla; the arrows in 3 show the longitudinal ridges in dentary bone that are like those observed in the premaxilla.

FIGURE 6. IGM 8991, Enchodus sp. from the Huehuetla quarry. Abbreviations: adt, anterior dentary tooth; art, articular, br, branchiostegal ray; cha, anterior ceratohyal; den, dentary; dp, dentary prongs; ect, ectopterygoid; pap, parasphenoid; pmx, premaxilla; op, opercle; pop, preopercle; slro, strengthened longitudinal ridge of the opercle (=longitudinal straight bar of the opercle); sop, subopercle.

FIGURE 7. IGM 9524, Tselfatia formosa from the Huehuetla quarry, Puebla, Mexico. 1, complete specimen coated with ammonium citrate; 2, closeup of fulcra in the longest anal fin ray indicated by black arrows (= square in 1).

FIGURE 8. IGM 9525, tail of a mosasaur from the Huehuetla quarry, Puebla, Mexico. Abbreviations: ns; neural spine; sc, scales.

FIGURE 9. Previous global stratigraphical ranges of the taxa found in the Turonian strata of the Huehuetla quarry, Puebla, Mexico.