Aptea plera DUXBURY 1983

Pl. 1, fig(s). 8, 11
NHM registration number: FD10(1)

Transmitted light images:

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Dorsal face in high focus, showing the ornamentation of paraplate 3" partially detached
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Dorsal face in high focus
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Optical section focused to show the outline of the cyst
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Ventral face in low focus

CLSM stills:

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Maximum Projection
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Shadow Projection
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Red/Green Anaglyph

CLSM movies:

Extended focus animation

Movie through the image stack

Original diagnosis:

"A large, dorso-ventrally flattened cyst with well-developed right lateral and left antapical horns. Poorly developed left lateral and right antapical horns may be present and the antapex may vary from convex to concave. Short, solid, distally and proximally flaring rods cover paraplate areas and these are distally united by a fine reticulum. Parasutural areas are free of such ornament and a paratabulation pattern of the formula 4', 6'', 6c, 6''', 1p, 1'''', 1a.s., 2s may be inferred. The "parasulcal" notch is offset to the left and the archeopyle is apical, formed by detachment of the whole apical series." - From Duxbury (1983, p. 22).


This species has later been transferred to the genus Pseudoceratium Gocht 1957. Now: Pseudoceratium plerum (Duxbury 1983) Bint 1986.

According to Bint (1986, p. 144), the genus Aptea Eisenack 1958a is a taxonomic junior synonym of Pseudoceratium. However, Quattrocchio & Sarjeant (1992, p. 2-234) retained Aptea.

(See Williams et al., 1998).