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Chiropteridium dispersum
Chiropteridium dispersum, Gocht, 1960
Tax. jr. synonym of Chiropteridium galea (Maier, 1959) Sarjeant, 1983, according to Sarjeant, 1983.
Holotype: Gocht, 1960, pl.18, fig.1
Locus typicus: Meckelfeld 87 Borehole, near Hamburg, Germany
Stratum typicum: Middle Oligocene
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Original description: [Gocht, 1960, p. 227]: (Translation: LPP):
Diagnosis:
Main body roundish to oval; antapex mostly vaulted, rarely flattened. Two rows of processes run on the right and left side between the poles along the margin, in different levels and not always clearly developed. They are are divided into numerous, mostly narrow distal ends by indentations of varying depth. Between them, irregularly spread on the body, are narrow to subtle processes, standing isolated or in short rows. Inner membrane of varying strength.
Dimensions:
holotype: main body 80:80 µm, total length 126 µm, total breadth 112 µm.
Other specimens: total length 95-136 µm, total breadth 85-142 µm (176 specimens).
Affinities: (p. 228):
Chiropteridium dispersum differs from C. lobospinosum in the smaller size, in irregular, subdivided planar processes and small, narrow to,pointed appendages, which also extend to the middle areas. The polar processes are less well distinguished.
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Gocht, 1969, p. 63,64: (Translation: GSC, courtesy R. Fensome):
Supplemental description/Remarks:
Some of the Meckelfeld material served as a basis for the original description (Gocht, 1960). As explained in that publication, the shape and arrangement of the processes in this species are extremely variable. The processes which unite to form fimbriae can be traced to the four meridional series between the poles only on some of these specimens. Frequently the fimbriae divide into individual processes. The smaller appendages scattered over the body are not disposed in any visible arrangement. Only occasionally, they form a series around the archeopyle margin; normally, however, the edge of the archeopyle is free of processes. The internal membrane is sometimes lightly granulate. The dispersum group, with its broad definition, perhaps includes different species. A special form with processes only on one of the two body faces was already differentiated by Gerlach, 1961 with the species name partispinatum and identified by Brosius, 1963 in the Kasseler Meeressand. In Meckelfeld it appears to be absent.
Tax. jr. synonym of Chiropteridium galea (Maier, 1959) Sarjeant, 1983, according to Sarjeant, 1983.
Holotype: Gocht, 1960, pl.18, fig.1
Locus typicus: Meckelfeld 87 Borehole, near Hamburg, Germany
Stratum typicum: Middle Oligocene
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Original description: [Gocht, 1960, p. 227]: (Translation: LPP):
Diagnosis:
Main body roundish to oval; antapex mostly vaulted, rarely flattened. Two rows of processes run on the right and left side between the poles along the margin, in different levels and not always clearly developed. They are are divided into numerous, mostly narrow distal ends by indentations of varying depth. Between them, irregularly spread on the body, are narrow to subtle processes, standing isolated or in short rows. Inner membrane of varying strength.
Dimensions:
holotype: main body 80:80 µm, total length 126 µm, total breadth 112 µm.
Other specimens: total length 95-136 µm, total breadth 85-142 µm (176 specimens).
Affinities: (p. 228):
Chiropteridium dispersum differs from C. lobospinosum in the smaller size, in irregular, subdivided planar processes and small, narrow to,pointed appendages, which also extend to the middle areas. The polar processes are less well distinguished.
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Gocht, 1969, p. 63,64: (Translation: GSC, courtesy R. Fensome):
Supplemental description/Remarks:
Some of the Meckelfeld material served as a basis for the original description (Gocht, 1960). As explained in that publication, the shape and arrangement of the processes in this species are extremely variable. The processes which unite to form fimbriae can be traced to the four meridional series between the poles only on some of these specimens. Frequently the fimbriae divide into individual processes. The smaller appendages scattered over the body are not disposed in any visible arrangement. Only occasionally, they form a series around the archeopyle margin; normally, however, the edge of the archeopyle is free of processes. The internal membrane is sometimes lightly granulate. The dispersum group, with its broad definition, perhaps includes different species. A special form with processes only on one of the two body faces was already differentiated by Gerlach, 1961 with the species name partispinatum and identified by Brosius, 1963 in the Kasseler Meeressand. In Meckelfeld it appears to be absent.