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Fromea reticulata
Fromea reticulata (Davey, 1969) Stover and Evitt, 1978
Now Batiacasphaera. Originally Chytroeisphaeridia, subsequently Fromea, thirdly (and now) Batiacasphaera.
Holotype: Davey, 1969, pl.4, fig.3
Locus typicus: Northern Natal, South Africa
Stratum typicum: Campanian-Maastrichtian
Original diagnosis: Davey, 1969, p.14: Chytroeisphaeridia reticulata
An ovoidal to subspherical cyst possessing a thick wall which bears a fine reticulation, rarely granulation. Apical archaeopyle tormed by the removal of a subangular to almost circular portion of the test.
Holotype: test diameter 28 Ám by 27 Ám. Range: length (operculum removed 21(28.3)36 Ám, width 18(26.5)35 Ám. Number of specimens measured, 10.
Original description: Davey, 1969, p.14: Chytroeisphaeridia reticulata
The cyst wall is unusually thick (1-1.5Á) for the size of the test. The surface reticuation of the test wall is very delicate and may only be observed under high power. All specimens possess an archaeopyle, occasionally the operculum remaining in position, which is more or less circular to subangular in shape. Two specimens discovered have a densely granular wall and an angular archaeopyle with splits extending down between the reflected plates.
Affinities:
Davey, 1969, p.14: Chytroeisphaeridia reticulata
The thick wall and delicate reticulation differentiate C. reticulata from all previously described species of dinoflagellate cyst. The specimens possessing a granular test wall and a definitely angular archaeopyle may, at a later date, be transferred to a different species.
Now Batiacasphaera. Originally Chytroeisphaeridia, subsequently Fromea, thirdly (and now) Batiacasphaera.
Holotype: Davey, 1969, pl.4, fig.3
Locus typicus: Northern Natal, South Africa
Stratum typicum: Campanian-Maastrichtian
Original diagnosis: Davey, 1969, p.14: Chytroeisphaeridia reticulata
An ovoidal to subspherical cyst possessing a thick wall which bears a fine reticulation, rarely granulation. Apical archaeopyle tormed by the removal of a subangular to almost circular portion of the test.
Holotype: test diameter 28 Ám by 27 Ám. Range: length (operculum removed 21(28.3)36 Ám, width 18(26.5)35 Ám. Number of specimens measured, 10.
Original description: Davey, 1969, p.14: Chytroeisphaeridia reticulata
The cyst wall is unusually thick (1-1.5Á) for the size of the test. The surface reticuation of the test wall is very delicate and may only be observed under high power. All specimens possess an archaeopyle, occasionally the operculum remaining in position, which is more or less circular to subangular in shape. Two specimens discovered have a densely granular wall and an angular archaeopyle with splits extending down between the reflected plates.
Affinities:
Davey, 1969, p.14: Chytroeisphaeridia reticulata
The thick wall and delicate reticulation differentiate C. reticulata from all previously described species of dinoflagellate cyst. The specimens possessing a granular test wall and a definitely angular archaeopyle may, at a later date, be transferred to a different species.