Back
Glaphyrocysta xinjiangensis
Glaphyrocysta xinjiangensis He Chengquan, 1991, p.139-140, pl.15, figs.8-9; pl.60, figs.1-2; text-figs.24a-f.
Originally Glaphyrocysta, subsequently Glaphyrocysta? Questionable assignment: Michoux and Soncini in Fauconnier and Masure (2004, p.250) as a problematic species.
Holotype: He Chengquan, 1991, pl.15, figs.8-9.
Age: Late Eocene.
Description from He Chengquan, 1991, translated by Suning Hou, 07-01-2019
Description: Body dorsal-ventral flattened, ellipse outline, the polar view is nearly circular, surface dense granular-short wrinkle or smooth. There are many nearly equal length processes around the body, mostly stripe like, solid, smooth, distal end is simple, or a small number of the ends have short branches with variable length and width, occasionally there are window holes at the branch base of the processes; There are very few wide/big processes, only a few, picker-shaped, surface slightly granular or nearly smooth, the terminal significantly bifurcated; Branches extend straight or slightly bent backwards, its length and width can be variable, branched ends narrowed or enlarged into an axe- trumpet shape; The distal edge of the processes is mostly smooth, no dentate decoration, but there is a row of coarse particles on the distal edge of large axe like branches; There are 2 picker-shaped processes at the antapex, deviating from the body central line, they most likely represent a combination of 1-2 antapical processes, with a stem width of 2.5μm and a terminal width of 25μm; There are also 1-2 big processes at the apex, distal ends fused to each other. Lack of such large processes in the precingular and postcingular regions. Process combination exists, intratabular type, the separation between each other is not so clear (due to the overlap of the proceses); Except at the apex and antapex, every combination consists of several processes with various shapes, processes are fine solid in general; The ends of the combinations are connected by the trabeculae or the extension of the process branches; The trabeculae is simple, fine strip or ring-shaped, smooth; and the combined cross-member is roughly rounded rectangle '25 μm × 15μm or larger. The processes are obviously absent at the middle of dorsal venral sides. Archeopyle apical, (tA) type, indicated by the "Z" -shaped main crack. Operculum preserved in situ.
Total length 122.7-125μm, width 87.9-115μm, body length 72.8-85μm, width 45.5-75μm, the length of the proceses22.4-27.3μm (measured 3); the total length of the holotype 125μm, width 115μm, body length 85μm, width 75μm, process Length about 25μm.
Comparison: This new species differs from Glaphryrorysta intricata in that the individual was larger, has more thin strip processes (mostly not bifurcated) and the distal margin of the apical and antapical processes was not dentate, It differs from G. retiintexta in lacking apical horn and possessing picker shape process at the antapex, etc; It differs from other species in this genus in that the trabeculae is not membrane or the end of the processes is not expanded.
Location and stratigraphy: Basebulak fm, member two, three.
Originally Glaphyrocysta, subsequently Glaphyrocysta? Questionable assignment: Michoux and Soncini in Fauconnier and Masure (2004, p.250) as a problematic species.
Holotype: He Chengquan, 1991, pl.15, figs.8-9.
Age: Late Eocene.
Description from He Chengquan, 1991, translated by Suning Hou, 07-01-2019
Description: Body dorsal-ventral flattened, ellipse outline, the polar view is nearly circular, surface dense granular-short wrinkle or smooth. There are many nearly equal length processes around the body, mostly stripe like, solid, smooth, distal end is simple, or a small number of the ends have short branches with variable length and width, occasionally there are window holes at the branch base of the processes; There are very few wide/big processes, only a few, picker-shaped, surface slightly granular or nearly smooth, the terminal significantly bifurcated; Branches extend straight or slightly bent backwards, its length and width can be variable, branched ends narrowed or enlarged into an axe- trumpet shape; The distal edge of the processes is mostly smooth, no dentate decoration, but there is a row of coarse particles on the distal edge of large axe like branches; There are 2 picker-shaped processes at the antapex, deviating from the body central line, they most likely represent a combination of 1-2 antapical processes, with a stem width of 2.5μm and a terminal width of 25μm; There are also 1-2 big processes at the apex, distal ends fused to each other. Lack of such large processes in the precingular and postcingular regions. Process combination exists, intratabular type, the separation between each other is not so clear (due to the overlap of the proceses); Except at the apex and antapex, every combination consists of several processes with various shapes, processes are fine solid in general; The ends of the combinations are connected by the trabeculae or the extension of the process branches; The trabeculae is simple, fine strip or ring-shaped, smooth; and the combined cross-member is roughly rounded rectangle '25 μm × 15μm or larger. The processes are obviously absent at the middle of dorsal venral sides. Archeopyle apical, (tA) type, indicated by the "Z" -shaped main crack. Operculum preserved in situ.
Total length 122.7-125μm, width 87.9-115μm, body length 72.8-85μm, width 45.5-75μm, the length of the proceses22.4-27.3μm (measured 3); the total length of the holotype 125μm, width 115μm, body length 85μm, width 75μm, process Length about 25μm.
Comparison: This new species differs from Glaphryrorysta intricata in that the individual was larger, has more thin strip processes (mostly not bifurcated) and the distal margin of the apical and antapical processes was not dentate, It differs from G. retiintexta in lacking apical horn and possessing picker shape process at the antapex, etc; It differs from other species in this genus in that the trabeculae is not membrane or the end of the processes is not expanded.
Location and stratigraphy: Basebulak fm, member two, three.