Anomozamites sp.

León, María Patricia Velasco de, Martínez, Erika Lourdes Ortiz, Barragan, Miguel Angel Flores, Madrid, Diana Silvia Guzmán & Martinez, Pedro Christian Martínez, 2024, New records of Bennettitales and associated flora from the Jurassic of the Cualac Formation, Mexico, Palaeontologia Electronica (a 14) 27 (1), pp. 1-19 : 4-6

Anomozamites sp. Otozamites hespera

Cycadolepis mexicana Ptillophyllum sp

Otozamites hespera

Pterophyllum spinosum

Pterophyllum sp

Ptillophyllum cf. acutifolium

Ptillophyllum sp.

Zamites diquiyui

Z. lucerensis

Z. oaxacensis

Z. tribulosus

TABLE 1 (continued).

umn (meters 73-78) proposed for the Tezoatlan area (fig. 5A, Zepeda Martines et al., 2021), which is characterized by an alternation of coarsegrained shale and sandstone strata ( Figure 2 ).

The fossil material recovered in the studied area corresponds to well-preserved plant fragments, whose stratigraphic position, state of preservation, and type of preserved structure were recorded, their degree of fragmentation (they must retain two-thirds of their size to be considered as complete leaves), the size of the organs, and their abundance ( Greenwood, 1991; Mancuso and Marsicano, 2008) to support the degree of material transport. These made it possible to analyze the transport to which they were subjected (Fergunson, 2005). The specimens were deposited in the Paleontological Collection of the Facultad de Estudios Superiores Zaragoza of the Universidad Nacional Autónoma de México under the acronym CFZCr. For the description and subsequent taxonomic identification of the fossil material collected, observations were made under an Olympus SZ51 stereo microscope and photographs were obtained with a Nikon 5100 camera. The photographs were used to measure each specimen in ImageJ version 1.38x.

Cuticular extraction was performed using the following techniques: acetate peel, dispersed cuticles with 10% hydrofluoric acid (HF), and mechanical extraction. The extracted cuticles were treated with a 3:1 Schultze solution (HNO3 and KClO3), 40% nitric acid (HNO3), and 5% ammonium hydroxide (NH4OH), bleached with 6% sodium hypochlorite (NaClO) and 30% hydrogen peroxide (H2O2), washed with distilled water, and mounted in 5% glycerin jelly ( Kerp, 1990; Knowenberg et al., 2007; Guzmán-Madrid, 2016; Guzmán-Madrid and Velasco-de León, 2017). In the case of CFZCr68, cellulose acetate was placed in the basal part of the flower where there is a layer of carbon to try to recover organic material. The cuticular samples were observed under an Olympus BX41 optical microscope and photographed with an Olympus E-620 digital camera. Specialized literature was used for the taxonomic determination of the specimens ( Thomas, 1915; Harris, 1953; Harris and Miller, 1974; Pott and McLoughlin, 2009).

Registration

The new name is registered with a unique PFN number in the Plant Fossil Names Registry, hosted and operated by the National Museum, Prague for the International Organisation of Palaeobotany.

Figures

FIGURE 2. Stratigraphic section of the collection zone. A - Sequence of rocks that outcrop in the Rosario locality. B - Image of the outcrop. C - image of the stratigraphic section where the shale strata are observed. Symbols: 1) Clay, 2) Silt, 3) Very Fine, 4) Fine, 5) Medium, 6) Thick, 7) Very Thick, and 8) Conglomerate.