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Tubotuberella lurida
Tubotuberella lurida (Deflandre, 1939a, p.166, pl.5, figs.4–6) Davies, 1983, p.24.
Holotype: Deflandre, 1939a, pl.5, figs.4–5; Jan du Chêne et al., 1986a, pl.109, figs.6–8.
NOW Endoscrinium. Originally Gymnodinium (Appendix B), subsequently Scriniodinium, thirdly (and now) Endoscrinium, fourthly Tubotuberella. Taxonomic junior synonym: Endoscrinium asymmetricum, according to Courtinat (2006, p.212).
Age: early Oxfordian.
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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.
Endoscrinium luridum (Deflandre, 1938a) Gocht, 1970b, is similar to E.asymmetricum in having a winglike ventral area of the hypocyst, which projects over the antapical paraplate, which is ventral in position. However, in E.asymmetricum the lobes of the winglike hypocystal feature are markedly different in size, this disparity gives the distinctive asymmetrical dorso-ventral outline. E.asymmetricum is also more angular in outline and more elongate longitudinally than E.luridum. The only opening in the periphragm of E.luridum is the archeopyle. E.asymmetricum may also have one or two opisthopyles. Size: length of 107 µm, minimum of 49 µm. The holotype is 68 x 69 µm.
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Holotype: Deflandre, 1939a, pl.5, figs.4–5; Jan du Chêne et al., 1986a, pl.109, figs.6–8.
NOW Endoscrinium. Originally Gymnodinium (Appendix B), subsequently Scriniodinium, thirdly (and now) Endoscrinium, fourthly Tubotuberella. Taxonomic junior synonym: Endoscrinium asymmetricum, according to Courtinat (2006, p.212).
Age: early Oxfordian.
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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.
Endoscrinium luridum (Deflandre, 1938a) Gocht, 1970b, is similar to E.asymmetricum in having a winglike ventral area of the hypocyst, which projects over the antapical paraplate, which is ventral in position. However, in E.asymmetricum the lobes of the winglike hypocystal feature are markedly different in size, this disparity gives the distinctive asymmetrical dorso-ventral outline. E.asymmetricum is also more angular in outline and more elongate longitudinally than E.luridum. The only opening in the periphragm of E.luridum is the archeopyle. E.asymmetricum may also have one or two opisthopyles. Size: length of 107 µm, minimum of 49 µm. The holotype is 68 x 69 µm.
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