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Phallocysta eumekes
Phallocysta eumekes Dörhöfer and Davies, 1980, p.27, figs.12,24D–E,G,26H,J–K,27A–I. Emendation: Riding, 1984b, p.119.
Holotype: Dörhöfer and Davies, 1980, fig.26K (not 29K as indicated in Dörhöfer and Davies, 1980); Fensome et al., 1993, p.1155, fig.1
Locus typicus: Reindeer Peninsula, Ellef Ringnes Island, Sverdrup Basin, Arctic Canada
Stratum typicum: Toarcian-Bajocian/Bathonian
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G.L. Williams short notes on species, Mesozoic-Cenozoic dinocyst course, Urbino, Italy, May 17-22, 1999 - LPP VIEWER CD-ROM 99.5.
Phallocysta eumekes Dörhöfer and Davies, 1980, emend. Riding, 1984b.
According to Riding (1984b), Phallocysta eumekes has a prominent apical horn and may have two prominent protrusions in two of the postcingular paraplate series. It is epicavate. The archeopyle is I, 2I or 3I; the opercular pieces being detached.
Size: length 41-64 µm, width 25-42 µm. Holotype length 64 µm.
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Original diagnosis: Dörhöfer and Davies, 1980, p.27
A species of Phallocysta with a sharply pointed apical horn and two large antapical bulges flanking the sulcus. Phragma two layered; periphragm bearing evenly but sparsely distributed granules; endophragm punctate. Tabulation 4', Sa, 6", ?6c, ?6''', ?''''. Archeopyle 3I, consisting of elongated plates with an enlarged central plate.
Remark: A sharp decrease of wall thickness occurs immediately anterior to the cingulum. The thin epitract is variably stretched out, the apical horn more sharply pointed and the wall more longitudinally folded as extension increases. The cingulum is occasionally faintly expressed. Length 41(47)64 µm; breadth 25(34)42 µm.
Emended diagnosis: Riding, 1984, p.119
An elongate species of Phallocysta with a prominent apical horn. Two prominent protrusions (probably intratabular in position) in two of the postcingular paraplate series may or may not be present. The species is markedly epicavate, the surface of the periphragm is smooth to finely granulate and the endophragm is smooth and markedly thicker than the periphragm. The sole indication of paratabulation is the archaeopyle which is intercalary (Type I, 2I or 3I); the operculum is typically detached and consists of one, two or three elongate anterior intercalary paraplates.
Holotype: Dörhöfer and Davies, 1980, fig.26K (not 29K as indicated in Dörhöfer and Davies, 1980); Fensome et al., 1993, p.1155, fig.1
Locus typicus: Reindeer Peninsula, Ellef Ringnes Island, Sverdrup Basin, Arctic Canada
Stratum typicum: Toarcian-Bajocian/Bathonian
--------------------------------------------------
G.L. Williams short notes on species, Mesozoic-Cenozoic dinocyst course, Urbino, Italy, May 17-22, 1999 - LPP VIEWER CD-ROM 99.5.
Phallocysta eumekes Dörhöfer and Davies, 1980, emend. Riding, 1984b.
According to Riding (1984b), Phallocysta eumekes has a prominent apical horn and may have two prominent protrusions in two of the postcingular paraplate series. It is epicavate. The archeopyle is I, 2I or 3I; the opercular pieces being detached.
Size: length 41-64 µm, width 25-42 µm. Holotype length 64 µm.
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Original diagnosis: Dörhöfer and Davies, 1980, p.27
A species of Phallocysta with a sharply pointed apical horn and two large antapical bulges flanking the sulcus. Phragma two layered; periphragm bearing evenly but sparsely distributed granules; endophragm punctate. Tabulation 4', Sa, 6", ?6c, ?6''', ?''''. Archeopyle 3I, consisting of elongated plates with an enlarged central plate.
Remark: A sharp decrease of wall thickness occurs immediately anterior to the cingulum. The thin epitract is variably stretched out, the apical horn more sharply pointed and the wall more longitudinally folded as extension increases. The cingulum is occasionally faintly expressed. Length 41(47)64 µm; breadth 25(34)42 µm.
Emended diagnosis: Riding, 1984, p.119
An elongate species of Phallocysta with a prominent apical horn. Two prominent protrusions (probably intratabular in position) in two of the postcingular paraplate series may or may not be present. The species is markedly epicavate, the surface of the periphragm is smooth to finely granulate and the endophragm is smooth and markedly thicker than the periphragm. The sole indication of paratabulation is the archaeopyle which is intercalary (Type I, 2I or 3I); the operculum is typically detached and consists of one, two or three elongate anterior intercalary paraplates.