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Platycystites cristatus
Taxonomy
Platycystites cristatus was named by Bassler (1943).
It was recombined as Globulocystites cristatus by Frest et al. (1979).
It was recombined as Globulocystites cristatus by Frest et al. (1979).
Sister species lacking formal opinion data
Synonyms
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Synonymy list
| Year | Name and author |
|---|---|
| 1943 | Platycystites cristatus Bassler pp. 697-698 figs. pi. 1, fig. 11 |
| 1943 | Platycystites bromidensis Bassler p. 698 figs. pl. 1, fig. 10. |
| 1943 | Platycystites fimbriatus Bassler p. 698 figs. pl. 1, fig. 12 |
| 1975 | Platycystites cristatus Parsley and Mintz pp. 73 - 74 figs. PI. 7, figs. 6-15; PI. 8, figs. 1-13; PI. 9, figs. 1-14; Text-figs. 3-6 |
| 1979 | Globulocystites cristatus Frest et al. p. 397 figs. P1. 2 figs. 9-12; Text-fig. 7C |
| 1982 | Platycystites cristatus Parsley |
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
†Platycystites cristatus Bassler 1943
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Invalid names: Platycystites bromidensis Bassler 1943 [synonym], Platycystites fimbriatus Bassler 1943 [synonym]
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| T. J. Frest et al. 1979 | Globulocystites with moderate- ly inflated theca; profile oval, cross section elongate oval. Arms unequal, right arm fails to reach column; arm calluses narrow, not strongly protrusive. Basic thecal plates: P1- P9, A1-A7, A8a, b, A9a, b, R2-5, L1-L3, PB, AB and RB. Intercalates numerous, somewhat variable in number, average about fifteen. Ornament consists of numerous fine irregularly scattered granules | |
| R. L. Parsley 1982 | Platycystites with compressed theca, thecal plates above periproct produced into narrow ridge, posterior face of ridge (plates A5, R2) often slightly concave. Anterior right side of theca with reduced number of intercalaries. Left arm usually extending to basals, right arm shorter, rarely extending beyond R5. |