. Bulletin of the British Museum (Natural History) Geology Supplement. ->J0 MESOZOIC AND CAINOZOIC DINOFLAGELLATE CYSTS body. Reflected tabulation deduced from linear complexes of 4', 6", 5'", ip, 1"". Processes slender, solid, taeniate, united half to two-thirds along their length by membranes or trabeculae. Processes distally unconnected and unequally bifurcate. Holotype. () slide ¥.51977(2). London Clay ; Enborne, Borehole E ii, 61 ft. Dimensions. Holotype : diameter of central body 61 by 73^. Length of proces- ses up to 36^. Observed range : diameter of centr
. Bulletin of the British Museum (Natural History) Geology Supplement. ->J0 MESOZOIC AND CAINOZOIC DINOFLAGELLATE CYSTS body. Reflected tabulation deduced from linear complexes of 4', 6", 5'", ip, 1"". Processes slender, solid, taeniate, united half to two-thirds along their length by membranes or trabeculae. Processes distally unconnected and unequally bifurcate. Holotype. () slide ¥.51977(2). London Clay ; Enborne, Borehole E ii, 61 ft. Dimensions. Holotype : diameter of central body 61 by 73^. Length of proces- ses up to 36^. Observed range : diameter of central body <\i-j^\l, length of processes up to 40[x. Number of specimens measured, 4. Description. This species is unusual in that it possesses processes restricted to the ambitus yet which are grouped into linear or sometimes arcuate complexes reflecting a dinoflagellate tabulation. The apical archaeopyle is nearly always developed and had a clear sulcal notch. The precingulars possess a variable number of processes, plates 1", 2", 4" and 5" having well-developed linear complexes, 3" having a complex of varying extent, whilst 6" can be devoid of processes. The processes are not unlike those of Areoligera medusettiformis (O. Wetzel). The interconnecting membrane sometimes extends to the base of the processes and, if so developed, is often fenestrate proximally. Distally the processes are bifurcate commonly with one fork longer than the other and recurved. Occasionally the processes are acuminate. Branching can occur distally to the interconnecting membrane or trabeculae. Occurrence. Eocene, London Clay ; Whitecliff and Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original British Museum (Natural History). London : BM(NH)
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