From Fensome et al., 2019:
Dingodinium sanmartinoi Pöthe de Baldis and Ramos, 1983, p.437–438, pl.2, figs.1–2. Holotype: Pöthe de Baldis and Ramos,
1983, pl.2, figs.1–2. Age: early Aptian.

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Original description: [Pöthe de Baldis and Ramos, 1983] (translated from Spanish):

Dingodinium sanmartinoi n. sp.
Plate II, figs. 1, 2 (Holotype)

Diagnosis. Elongated, camocavated cyst with preferential lateral orientation.
The endocyst is ellipsoidal, attached dorsally to the pericyst, i.e., eccentrically positioned, resulting in a prominent pericelium.
The endophragm is thicker than the periphragm and densely covered with baculae up to 2 μ high. The periphragm is smooth to weakly granular.
The pericyst has a long, open apical horn. A fairly well-defined intercalary archeopyle is observed, although not very clear, due to the loss of plate 2a.
There are no indications of paratabulation except for the paracingulum, evidenced by folds in the periphragm.

Holotype coordinates. 111.8/27.0 [PLS-1 (4)].
Holotype dimensions. Endocyst: Width: 72 μ. Length: 113 μ.
Pericyst: Width: 51 μ. Length: 71 μ.
Paratypes: Coordinates.
94.2/34.35 PLS-1(1)
107.1/39.6 PLS-1(1)
112.9/35.8 PLS-1(1)

Comparisons. The strong ornamentation of the endophragm allows this species to be separated from those described, which have a less prominent sculpture.

Derivatio nominis. From Lago San Martín, Santa Cruz Province, where the samples came from.