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Hystrichostrogylon membraniphorum
Hystrichostrogylon membraniphorum Agelopoulos, 1964
Originally (and now) Hystrichostrogylon, subsequently Achomosphaera.
Eaton, 1976, transferred this species to Achomosphaera Evitt, 1963. Stover and Evitt, 1978, retained it in Hystrichostrogylon.
Holotype: Agelopoulos, 1964, text-fig.1
Paratype: Agelopoulos, 1964
Locus typicus: Heiligenhafen, Holstein, Germany
Stratum typicum: Late Eocene
Translation Agelopoulos, 1964: Stover and Evitt, 1978, p. 164
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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.
Hystrichostrogylon membraniphorum Agelopoulos, 1964, has an ovoidal to spherical central body, apparently slightly flattened, provided with furcate spines, and enclosed by a delicate, transparent, antapically developed somewhat concentric pericyst that lies close to the inner shell ventrally and dorsally. Slender long hollow processes occur in the region of the apex which is indicated by the archeopyle, whereas wide, broad-surfaced processes are confined to the region of the antapex and therefore to the pericyst. The central body within pericyst possesses no processes. Size: central body diameter 35-57 µm, length of processes 13-29 µm.
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Original description: Agelopoulos, 1964, p. 674
Diagnosis (as for the genus): Central shell spherical to oval, apparently slightly flattened, providedd with forked spines, and enclosed by a delicate, transparent, only antapically developed, somewhat concentric outer shell that lies close to the inner shell ventrally and dorsally. Slender, long, hollow processes occur in the region of the apex which is indicated by a pylome, whereas wide, broad-surfaced processes are confined to the region of the antapex and therefore to the outer shell. The central shell within the outer shell possesses no processes.
Originally (and now) Hystrichostrogylon, subsequently Achomosphaera.
Eaton, 1976, transferred this species to Achomosphaera Evitt, 1963. Stover and Evitt, 1978, retained it in Hystrichostrogylon.
Holotype: Agelopoulos, 1964, text-fig.1
Paratype: Agelopoulos, 1964
Locus typicus: Heiligenhafen, Holstein, Germany
Stratum typicum: Late Eocene
Translation Agelopoulos, 1964: Stover and Evitt, 1978, p. 164
--------------------------------------------------
G.L. Williams short notes on species, Mesozoic-Cenozoic dinocyst course, Urbino, Italy, May 17-22, 1999 - LPP VIEWER CD-ROM 99.5.
Hystrichostrogylon membraniphorum Agelopoulos, 1964, has an ovoidal to spherical central body, apparently slightly flattened, provided with furcate spines, and enclosed by a delicate, transparent, antapically developed somewhat concentric pericyst that lies close to the inner shell ventrally and dorsally. Slender long hollow processes occur in the region of the apex which is indicated by the archeopyle, whereas wide, broad-surfaced processes are confined to the region of the antapex and therefore to the pericyst. The central body within pericyst possesses no processes. Size: central body diameter 35-57 µm, length of processes 13-29 µm.
--------------------------------------------------
Original description: Agelopoulos, 1964, p. 674
Diagnosis (as for the genus): Central shell spherical to oval, apparently slightly flattened, providedd with forked spines, and enclosed by a delicate, transparent, only antapically developed, somewhat concentric outer shell that lies close to the inner shell ventrally and dorsally. Slender, long, hollow processes occur in the region of the apex which is indicated by a pylome, whereas wide, broad-surfaced processes are confined to the region of the antapex and therefore to the outer shell. The central shell within the outer shell possesses no processes.