Back
Fromea acambra
From Fensome et al., 2019:
Fromea acambra Sah et al., 1970, p.148, pl.2, fig.28. Holotype: Sah et al., 1970, pl.2, fig.28. Originally (and now) Fromea,
subsequently Palaeostomocystis (Appendix A). Jansonius (1989, p.65) retained this species in Fromea. Age: Late
Cretaceous
---------------------------------------------------------------------------------------------------
Original description (Sah et al., 1970):
Fromea acambra sp. nov.
PI. 2, Fig. 28
Holotype - PI. 2, Fig. 28. Size 86x54 μ
Slide no. 3650.
No. of specimens studied- 9.
Diagnosis - Cysts ± pitcher shaped; archeopyle apical; cyst membrane thin, granulose; equatorial girdle not discernible.
Description- Cysts with small or elongated neck-like opening. Size range 80-120 X 50-80 μ. Cyst membrane ± 1 μ thick, grana up to 1 μ high, densely placed, so much so that generally no intergranular space is left. Surface mostly irregularly folded. In some specimens a tubular process
seems to be adpressed in the equatorial region.
Comparison - Fromea amphora Cook. & Eisen. (1958) resembles the present species in shape and size but the latter can be distinguished
by the abscnce of an equatorial girdle, which in F. amphora is of diagnostic value and has been reported by most of the workers (Alber. 1961; Cooks. & Hugh., 1964; Man., 1964).
Remarks- None of the species described under the genus Fromea compare with the present species.
Fromea acambra Sah et al., 1970, p.148, pl.2, fig.28. Holotype: Sah et al., 1970, pl.2, fig.28. Originally (and now) Fromea,
subsequently Palaeostomocystis (Appendix A). Jansonius (1989, p.65) retained this species in Fromea. Age: Late
Cretaceous
---------------------------------------------------------------------------------------------------
Original description (Sah et al., 1970):
Fromea acambra sp. nov.
PI. 2, Fig. 28
Holotype - PI. 2, Fig. 28. Size 86x54 μ
Slide no. 3650.
No. of specimens studied- 9.
Diagnosis - Cysts ± pitcher shaped; archeopyle apical; cyst membrane thin, granulose; equatorial girdle not discernible.
Description- Cysts with small or elongated neck-like opening. Size range 80-120 X 50-80 μ. Cyst membrane ± 1 μ thick, grana up to 1 μ high, densely placed, so much so that generally no intergranular space is left. Surface mostly irregularly folded. In some specimens a tubular process
seems to be adpressed in the equatorial region.
Comparison - Fromea amphora Cook. & Eisen. (1958) resembles the present species in shape and size but the latter can be distinguished
by the abscnce of an equatorial girdle, which in F. amphora is of diagnostic value and has been reported by most of the workers (Alber. 1961; Cooks. & Hugh., 1964; Man., 1964).
Remarks- None of the species described under the genus Fromea compare with the present species.