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Glaphyrocysta priabonensis
Glaphyrocysta priabonensis Brinkhuis, 1994, p.158-159
This name was not validly published in Brinkhuis (1992, p.98), since that author specified it to be a manuscript name.
Holotype: Brinkhuis 1994: Plate I, 1 5
Type locality: Priabona section, northeast Italy
Stratum typicum: Upper Eocene
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G.L. Williams short notes on species, Mesozoic-Cenozoic dinocyst course, Urbino, Italy, May 17-22, 1999 - LPP VIEWER CD-ROM 99.5.
Glaphyrocysta priabonensis Brinkhuis, 1994, has an irregularly perforate periphragm, causing a reticulate appearance, with typically aculeate spiny outgrowths. The periphragm is of variable shape and size and in contact with the endophragm ventrally. In most specimens, the endophragm and periphragm are widely separated dorsally. The paracingulum is formed by a ventrally located, irregularly shaped rim of the periphragm, which is in contact with the endophragm in the parasulcal region. Ventrally the periphragm is supported by solid, slender, irregularly branched processes. Size: central body length 45-61 µm, width 39-59 µm, overall length/width 69-102 µm
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Original diagnosis: Brinkhuis 1994, p. 158-159
A species of Glaphyrocysta that is characterized by its irregularly perforate periphragm, causing a reticulate appearance, with typically aculeate spiny outgrowths. The lenticular to sphaerical shaped endophragm is smooth to faintly granulate. The periphragm is of variable shape and size, and is in contact with the endophragm ventrally. Most specimens display wide separation of the periphragm and endophragm dorsally. Indications of paratabulation are lacking, except for the archaeopyle, parasulcus and paracingulum. The latter is formed by a ventrally located, irregularly shaped rim of the periphragm which is in contact with the endophragm in the parasulcal area (see Fig. 16). Ventrally, the periphragm is supported by solid, slender, irregularly branched processes. The apical archeopyle, which is invariably evident with a detached operculum, reflects the loss of all the apical paraplates.
Dimensions: Central body length: 45-61µm (holotype, 53 µm); width: 39-59 µm (holotype, 44 µm).
Overall length/width: 69-102 µm (holotype, 81-85 µm). Twenty-five specimens were measured.
Occurrence: common to rare.
Observed stratigraphic range: Upper Eocene. Someisolated specimens occur slightly above the LO of
the hantkeninids (=P17/P18 boundary).
Remarks: Glaphyrocysta priabonensis sp. nov. differs from all other species of the genus by its irregularly perforated periphragm with typical aculeate spiny outgrowths. Similar forms have not been reported on in the literature.
This name was not validly published in Brinkhuis (1992, p.98), since that author specified it to be a manuscript name.
Holotype: Brinkhuis 1994: Plate I, 1 5
Type locality: Priabona section, northeast Italy
Stratum typicum: Upper Eocene
--------------------------------------------------
G.L. Williams short notes on species, Mesozoic-Cenozoic dinocyst course, Urbino, Italy, May 17-22, 1999 - LPP VIEWER CD-ROM 99.5.
Glaphyrocysta priabonensis Brinkhuis, 1994, has an irregularly perforate periphragm, causing a reticulate appearance, with typically aculeate spiny outgrowths. The periphragm is of variable shape and size and in contact with the endophragm ventrally. In most specimens, the endophragm and periphragm are widely separated dorsally. The paracingulum is formed by a ventrally located, irregularly shaped rim of the periphragm, which is in contact with the endophragm in the parasulcal region. Ventrally the periphragm is supported by solid, slender, irregularly branched processes. Size: central body length 45-61 µm, width 39-59 µm, overall length/width 69-102 µm
--------------------------------------------------
Original diagnosis: Brinkhuis 1994, p. 158-159
A species of Glaphyrocysta that is characterized by its irregularly perforate periphragm, causing a reticulate appearance, with typically aculeate spiny outgrowths. The lenticular to sphaerical shaped endophragm is smooth to faintly granulate. The periphragm is of variable shape and size, and is in contact with the endophragm ventrally. Most specimens display wide separation of the periphragm and endophragm dorsally. Indications of paratabulation are lacking, except for the archaeopyle, parasulcus and paracingulum. The latter is formed by a ventrally located, irregularly shaped rim of the periphragm which is in contact with the endophragm in the parasulcal area (see Fig. 16). Ventrally, the periphragm is supported by solid, slender, irregularly branched processes. The apical archeopyle, which is invariably evident with a detached operculum, reflects the loss of all the apical paraplates.
Dimensions: Central body length: 45-61µm (holotype, 53 µm); width: 39-59 µm (holotype, 44 µm).
Overall length/width: 69-102 µm (holotype, 81-85 µm). Twenty-five specimens were measured.
Occurrence: common to rare.
Observed stratigraphic range: Upper Eocene. Someisolated specimens occur slightly above the LO of
the hantkeninids (=P17/P18 boundary).
Remarks: Glaphyrocysta priabonensis sp. nov. differs from all other species of the genus by its irregularly perforated periphragm with typical aculeate spiny outgrowths. Similar forms have not been reported on in the literature.