Three fossil wood types are described from the Olmos Formation, Coahuila, Mexico. The
anatomical characters of two of them enable identification to Malvaceae and Fagaceae,
while the affiliation of the third type is uncertain (Fagaceae?). The wood of the Malvaceae
fossil plant is characterised by the presence of vessel-ray and vessel-parenchyma pits with
reduced borders, larger than the intervascular pits, scanty paratracheal parenchyma, septate
fibres and storied structure. This wood type, Javelinoxylon, has been also found in the …