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Achomosphaera delicata
From Fensome et al., 2019:
Achomosphaera? delicata, Sah et al., 1970, p.144–145, pl.1, figs.4–5.
Holotype: Sah et al., 1970, pl.1, fig.4.
Originally Achomosphaera, subsequently (and now) Achomosphaera?.
Questionable assignment: Stover and Evitt (1978, p.139).
Age: Late Cretaceous.
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Original description: [Sah et al., 1970, p. 144-145]:
Holotype - PI. 1, Fig. 4. Size 64 x 46 μ.
Slide no. 3638.
No. of specimens studied - 13.
Diagnosis - Cysts oval-subcircular, 55-70 x 40-65 μ. Archeopyle precingular, simple; processes many bacular; cyst membrane thin, laevigate.
Description - Cysts with equally broad lateral ends, sometimes irregularly folded. Archeopyle observed in some specimens. Processes up to 10 μ long, ± uniformly broad or slightly tapering, rarely bifurcating, forming a negative reticulum in surface view. Cyst membrane 1-1·5 μ thick.
Comparison - Achomosphaera cambra resembles the present species in shape and size but differs in having spinose processes which are joined together at the cingular region. A. operculata approaches near the present species in having bacular processes but can be easily distinguished by its predominantly circular shape and granulose cyst membrane. Both A. sagena Dav. & Will. (1966) and A. neptuni (Eisen.) Gocht (1959) differ in having well developed bifurcating processes.
Achomosphaera? delicata, Sah et al., 1970, p.144–145, pl.1, figs.4–5.
Holotype: Sah et al., 1970, pl.1, fig.4.
Originally Achomosphaera, subsequently (and now) Achomosphaera?.
Questionable assignment: Stover and Evitt (1978, p.139).
Age: Late Cretaceous.
---------------------------------------------------------------------------------------------------
Original description: [Sah et al., 1970, p. 144-145]:
Holotype - PI. 1, Fig. 4. Size 64 x 46 μ.
Slide no. 3638.
No. of specimens studied - 13.
Diagnosis - Cysts oval-subcircular, 55-70 x 40-65 μ. Archeopyle precingular, simple; processes many bacular; cyst membrane thin, laevigate.
Description - Cysts with equally broad lateral ends, sometimes irregularly folded. Archeopyle observed in some specimens. Processes up to 10 μ long, ± uniformly broad or slightly tapering, rarely bifurcating, forming a negative reticulum in surface view. Cyst membrane 1-1·5 μ thick.
Comparison - Achomosphaera cambra resembles the present species in shape and size but differs in having spinose processes which are joined together at the cingular region. A. operculata approaches near the present species in having bacular processes but can be easily distinguished by its predominantly circular shape and granulose cyst membrane. Both A. sagena Dav. & Will. (1966) and A. neptuni (Eisen.) Gocht (1959) differ in having well developed bifurcating processes.