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Cyclonephelium hystrix
Tenua hystrix (Eisenack, 1958) Davey, 1978
Now Tenua Eisenack, 1958a. Originally (and now) Tenua Eisenack, 1958, subsequently Cyclonephelium.
Tax. sr. synonym of Tenua hystricella Eisenack, 1958, according to Eisenack and Kjellstrom, 1971, and Brideaux and McIntyre, 1975.
Tax. sr. synonym of Cerbia tabulata (Davey and Verdier, 1974) Below, 1981, according to Sarjeant, 1985, 1992.
Stover and Williams, 1987, and Lentin and Williams, 1989, retained Cerbia tabulata as a separate species.
Possible tax. sr. synonym of Circulodinium hirtellum Alberti, 1961, according to Backhouse, 1988.
Sarjeant and Stover, 1978, also transferred this species to Cyclonephelium.
Holotype: Eisenack, 1958, pl.23, fig.1; Sarjeant, 1985, pl.10, fig.5; Sarjeant, 1992, fig.1
Locus typicus: N Germany
Stratum typicum: Aptian
Translation Eisenack, 1958: Sarjeant, 1985
Original diagnosis: Eisenack, 1958, p.410: Tenua hystrix
A species of Tenua of 75-105 Ám length and about 65-97 Ám breadth. The spinelets are, on the sarne individual, mostly rather constant in length, varying however-from 2-10 Ám length; they are at their tips either thickened in knoblike fashion or briefly branched; only rarely do the short, clublike branch-prongs show secondary division.
Supplemental description: Mao Shaozhi and Norris, 1988, p. 33
Cyst dorsoventrally flattened, truncated-circular to semicircular in shape with no apical plates, usually more or less asymmetrical. Wall surface covered with stout, rigid, and densely and uniformly distributed nontabular processes; expanded proximally and slightly expanded or capitate distally; usually 1-2 Ám (rarely up to 5 Ám) long, 0.5-2 Ám wide. Archeopyle apical, type (tA).
Operculum usually detached; archeopyle suture zigzag with accessory sutures indicating six precingular plates.
Now Tenua Eisenack, 1958a. Originally (and now) Tenua Eisenack, 1958, subsequently Cyclonephelium.
Tax. sr. synonym of Tenua hystricella Eisenack, 1958, according to Eisenack and Kjellstrom, 1971, and Brideaux and McIntyre, 1975.
Tax. sr. synonym of Cerbia tabulata (Davey and Verdier, 1974) Below, 1981, according to Sarjeant, 1985, 1992.
Stover and Williams, 1987, and Lentin and Williams, 1989, retained Cerbia tabulata as a separate species.
Possible tax. sr. synonym of Circulodinium hirtellum Alberti, 1961, according to Backhouse, 1988.
Sarjeant and Stover, 1978, also transferred this species to Cyclonephelium.
Holotype: Eisenack, 1958, pl.23, fig.1; Sarjeant, 1985, pl.10, fig.5; Sarjeant, 1992, fig.1
Locus typicus: N Germany
Stratum typicum: Aptian
Translation Eisenack, 1958: Sarjeant, 1985
Original diagnosis: Eisenack, 1958, p.410: Tenua hystrix
A species of Tenua of 75-105 Ám length and about 65-97 Ám breadth. The spinelets are, on the sarne individual, mostly rather constant in length, varying however-from 2-10 Ám length; they are at their tips either thickened in knoblike fashion or briefly branched; only rarely do the short, clublike branch-prongs show secondary division.
Supplemental description: Mao Shaozhi and Norris, 1988, p. 33
Cyst dorsoventrally flattened, truncated-circular to semicircular in shape with no apical plates, usually more or less asymmetrical. Wall surface covered with stout, rigid, and densely and uniformly distributed nontabular processes; expanded proximally and slightly expanded or capitate distally; usually 1-2 Ám (rarely up to 5 Ám) long, 0.5-2 Ám wide. Archeopyle apical, type (tA).
Operculum usually detached; archeopyle suture zigzag with accessory sutures indicating six precingular plates.