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Eatonicysta ursulae ssp. furensis
Eatonicysta ursulae ssp. furensis Heilmann-Clausen and Costa, 1989
NOW Eatonicysta furensis. Originally Eatonicysta ursulae subsp. furensis, subsequently (and now) Eatonicysta furensis.
Holotype: Heilmann-Clausen, 1982, fig.3A; Heilmann-Clausen and Costa, 1989, pl.11, fig.7.
Locus typicus: Knuden Cliff, Fur Island, Denmark
Stratum typicum: Early Eocene (Ypresian)
Original diagnosis: Heilmann-Clausen and Costa, 1989, p. 466
This subspecies differs from E. ursulae ssp. ursulae in the morphology of processes and ectophragrn. The processes in ssp. furensis are shorter and funnel-shaped. Process stems and ectophragmal network grade imperceptibly into each other.
The ectophragmal network is divided into separate areas with tightly interwoven trabeculae, each area corresponding to a process and representing an ectophragmal paraplate. A small number of trabeculae connect individual ectophragmal paraplates.
Dimensions of holotype: Ectocyst length: 62 Ám; Ectocyst width: 60 Ám; Central body length: 40 Ám; Central body width: 43 Ám.
Remarks: Subspecies furensis is the earliest representative of E. ursulae. Intermediate forms between ssp. furensis and typical ssp. ursulae occur in Denmark at the top of the Knudshoved member. These forms have long and massive processes, like in ssp. ursulae. The ectophragmal network is more homogeneous than in typical ssp. furensis, but pandasutural areas of the network may still be discriminated.
NOW Eatonicysta furensis. Originally Eatonicysta ursulae subsp. furensis, subsequently (and now) Eatonicysta furensis.
Holotype: Heilmann-Clausen, 1982, fig.3A; Heilmann-Clausen and Costa, 1989, pl.11, fig.7.
Locus typicus: Knuden Cliff, Fur Island, Denmark
Stratum typicum: Early Eocene (Ypresian)
Original diagnosis: Heilmann-Clausen and Costa, 1989, p. 466
This subspecies differs from E. ursulae ssp. ursulae in the morphology of processes and ectophragrn. The processes in ssp. furensis are shorter and funnel-shaped. Process stems and ectophragmal network grade imperceptibly into each other.
The ectophragmal network is divided into separate areas with tightly interwoven trabeculae, each area corresponding to a process and representing an ectophragmal paraplate. A small number of trabeculae connect individual ectophragmal paraplates.
Dimensions of holotype: Ectocyst length: 62 Ám; Ectocyst width: 60 Ám; Central body length: 40 Ám; Central body width: 43 Ám.
Remarks: Subspecies furensis is the earliest representative of E. ursulae. Intermediate forms between ssp. furensis and typical ssp. ursulae occur in Denmark at the top of the Knudshoved member. These forms have long and massive processes, like in ssp. ursulae. The ectophragmal network is more homogeneous than in typical ssp. furensis, but pandasutural areas of the network may still be discriminated.