Back
Rhynchodiniopsis confusa
Rhynchidiniopsis? confusa (Vozzhennikova, 1967) Sarjeant, 1982
Now Apteodinium. Originally Gonyaulax, subsequently Gonyaulacysta, thirdly Millioudodinium?, fourthly Rhynchodiniopsis?, fifthly (and now) Apteodinium. Sarjeant, 1982 considered this to be a "provisionally accepted species" of Rhynchodiniopsis. Lentin and Williams, 1989 recommended that the name of this species be restricted to the holotype. Lentin and Vozzhennikova, 1990 retained this species in Apteodinium Eisenack, 1958.
Holotype: Vozzhennikova, 1967, pl.25, fig.5; lost, according to Lentin and Vozzhennikova, 1990
Lectotype: none available, according to Lentin and Vozzhennikova, 1990
Locus typicus: Mocow region, Russia
Stratum typicum: Late Jurassic
Translation Vozzhennikova, 1967: Lentin and Vozzhennikova, 1990
Original description: Vozzhennikova, 1967, p.80: Gonyaulax confusum
Theca with somewhat asymmetrical rhomboidal outline Epitheca equal in size to the hypotheca or somewhat larger, with a small, bluntly tipped apical horn, thickened at the base and somewhat laterally compressed. Hypotheca trapeziform, its smaller side corresponding to the antapical part of the theca. Antapical plate quadrangular Transverse furrow shallow, twisted to the left, the two ends distant from each other by the witdh of the furrow. The edges of the furrow and of the plates delinited by very low processes, which tend to obscure the outlines particularly of the plates on the ventral side of the epitheca. Thecal armour thick, its surface granular or finely tuberculate; thickness of walls 2 to 2.5 µm. Pylome present.
Size: Holotype, length 93 µm, width 62 µm, width of paracingulum about 3 µm; Range, length 78 - 100 µm, width 62 - 95 µm.
Now Apteodinium. Originally Gonyaulax, subsequently Gonyaulacysta, thirdly Millioudodinium?, fourthly Rhynchodiniopsis?, fifthly (and now) Apteodinium. Sarjeant, 1982 considered this to be a "provisionally accepted species" of Rhynchodiniopsis. Lentin and Williams, 1989 recommended that the name of this species be restricted to the holotype. Lentin and Vozzhennikova, 1990 retained this species in Apteodinium Eisenack, 1958.
Holotype: Vozzhennikova, 1967, pl.25, fig.5; lost, according to Lentin and Vozzhennikova, 1990
Lectotype: none available, according to Lentin and Vozzhennikova, 1990
Locus typicus: Mocow region, Russia
Stratum typicum: Late Jurassic
Translation Vozzhennikova, 1967: Lentin and Vozzhennikova, 1990
Original description: Vozzhennikova, 1967, p.80: Gonyaulax confusum
Theca with somewhat asymmetrical rhomboidal outline Epitheca equal in size to the hypotheca or somewhat larger, with a small, bluntly tipped apical horn, thickened at the base and somewhat laterally compressed. Hypotheca trapeziform, its smaller side corresponding to the antapical part of the theca. Antapical plate quadrangular Transverse furrow shallow, twisted to the left, the two ends distant from each other by the witdh of the furrow. The edges of the furrow and of the plates delinited by very low processes, which tend to obscure the outlines particularly of the plates on the ventral side of the epitheca. Thecal armour thick, its surface granular or finely tuberculate; thickness of walls 2 to 2.5 µm. Pylome present.
Size: Holotype, length 93 µm, width 62 µm, width of paracingulum about 3 µm; Range, length 78 - 100 µm, width 62 - 95 µm.