Back
Achomosphaera membraniphora
From Williams, Lentin and Fensome 1998 - Lentin and Williams Index of Fossil Dinoflagellates:
"Achomosphaera membraniphora, (Agelopoulos, 1964, p. 674, text-figs.1–2), Eaton, 1976, p. 237
NOW Hystrichostrogylon. Originally (and now) Hystrichostrogylon, subsequently Achomosphaera. Stover and Evitt (1978, p.165) retained this species in Hystrichostrogylon.
Holotype: Agelopoulos, 1964, text-fig.1"
Paratype: Agelopoulos, 1964
Locus typicus: Heiligenhafen, Holstein, Germany
Age: Late Eocene
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Original description as Hystrichostrogylon membraniphorum : [Agelopoulos, 1964, p. 674]: (Translation: Stover and Evitt, 1978, p. 164):
Diagnosis (as for the genus):
Central shell spherical to oval, apparently slightly flattened, provided 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.
"Achomosphaera membraniphora, (Agelopoulos, 1964, p. 674, text-figs.1–2), Eaton, 1976, p. 237
NOW Hystrichostrogylon. Originally (and now) Hystrichostrogylon, subsequently Achomosphaera. Stover and Evitt (1978, p.165) retained this species in Hystrichostrogylon.
Holotype: Agelopoulos, 1964, text-fig.1"
Paratype: Agelopoulos, 1964
Locus typicus: Heiligenhafen, Holstein, Germany
Age: Late Eocene
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Original description as Hystrichostrogylon membraniphorum : [Agelopoulos, 1964, p. 674]: (Translation: Stover and Evitt, 1978, p. 164):
Diagnosis (as for the genus):
Central shell spherical to oval, apparently slightly flattened, provided 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.