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Stanfordella granulosa
Stanfordella *granulosa Helenes and Lucas-Clark, 1997, p.182, pl.2, figs.1–8; text-figs.4A–D.
Taxonomic junior synonyms: Dampierodinium ovum and Farragodinium curiosum (both names not validly published), both according to Riding and Helby (2001g, p.212).
Holotype: Helenes and Lucas-Clark, 1997, pl.2, figs.1–2.
Age: late Tithonian–Valanginian.
Original description Helenes and Lucas-Clark, 1997
Holotype. Plate 2, figs. 1-2.
Comments. Type species of the genus. This species was first described by Dr. John S. Warren (1967) in an unpublished Ph.D. dissertation presented at Stanford University. The holotype is located at the Laboratory of Micropaleontology at CICESE, Baja California, Mexico, slide Num. BP 17, coordinates 117.2-6.0; corrected to conform to the vernier scales of the stage of Zeiss Photoscope (PL-2) at the same laboratory. The type specimen is surrounded by ablue circle on the coverslip and a brown circle under the slide. It is located at 12 millimeters to the right of the angle formed by a 7 engraved with diamond on the left side of the slide, and at 7 millimeters from the nearest long side of the slide.
Diagnosis. Proximate cysts with subspherical body and
a short apical horn (Text-Figure 4). Precingular archeopyle Type P4. Peri-and endophragm appressed except under the apical horn and occasionally under the parasutural features. Parasutural features low, continuous, smooth to slightly denticulate ridges that define a paratabulation conforming to that of Stanfordella (described above). Intratabular features numerous, evenly spaced low granules. Equatorial diameter approximately 60 µm, body length approximately 60 µn, height of the apical horn approximately 6 µm.
Remarks. Warren (1967, Ph.D. dissertation, p. 129) described this species (as Gonyaulacysta granulosa) from the Late Jurassic (late Tithonian) to Early Cretaceous (Valanginian) sediments in the McCarty Creek section of the Great Valley Sequence, two miles north of Paskenta, southern Tehama County, California, U.S.A. In Warren's (1967, p. 131) biostratigraphic zonation, 5. granulosa occurs in the upper 3/4 of the Belodinium dysculum zone, in the lower 1/4 of the Canningia adnata zone, and in the Pyxidiella vermiculata subzone of the Dingodinium conocornutum zone.
Taxonomic junior synonyms: Dampierodinium ovum and Farragodinium curiosum (both names not validly published), both according to Riding and Helby (2001g, p.212).
Holotype: Helenes and Lucas-Clark, 1997, pl.2, figs.1–2.
Age: late Tithonian–Valanginian.
Original description Helenes and Lucas-Clark, 1997
Holotype. Plate 2, figs. 1-2.
Comments. Type species of the genus. This species was first described by Dr. John S. Warren (1967) in an unpublished Ph.D. dissertation presented at Stanford University. The holotype is located at the Laboratory of Micropaleontology at CICESE, Baja California, Mexico, slide Num. BP 17, coordinates 117.2-6.0; corrected to conform to the vernier scales of the stage of Zeiss Photoscope (PL-2) at the same laboratory. The type specimen is surrounded by ablue circle on the coverslip and a brown circle under the slide. It is located at 12 millimeters to the right of the angle formed by a 7 engraved with diamond on the left side of the slide, and at 7 millimeters from the nearest long side of the slide.
Diagnosis. Proximate cysts with subspherical body and
a short apical horn (Text-Figure 4). Precingular archeopyle Type P4. Peri-and endophragm appressed except under the apical horn and occasionally under the parasutural features. Parasutural features low, continuous, smooth to slightly denticulate ridges that define a paratabulation conforming to that of Stanfordella (described above). Intratabular features numerous, evenly spaced low granules. Equatorial diameter approximately 60 µm, body length approximately 60 µn, height of the apical horn approximately 6 µm.
Remarks. Warren (1967, Ph.D. dissertation, p. 129) described this species (as Gonyaulacysta granulosa) from the Late Jurassic (late Tithonian) to Early Cretaceous (Valanginian) sediments in the McCarty Creek section of the Great Valley Sequence, two miles north of Paskenta, southern Tehama County, California, U.S.A. In Warren's (1967, p. 131) biostratigraphic zonation, 5. granulosa occurs in the upper 3/4 of the Belodinium dysculum zone, in the lower 1/4 of the Canningia adnata zone, and in the Pyxidiella vermiculata subzone of the Dingodinium conocornutum zone.