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Ceratiopsis speciosa ssp. elongata
Ceratiopsis speciosa ssp. elongata, Mao Shaozhi and Norris, 1988
Now Cerodinium speciosum ssp. elongatum. Originally Ceratiopsis (an illegitimate generic name) speciosa ssp. elongata, subsequently (and now) Cerodinium speciosum ssp. elongatum. The subspecies name Ceratiopsis speciosa ssp. elongata is valid even though the generic name Ceratiopsis is illegitimate.
Holotype: Mao Shaozhi and Norris, 1988, pl.9, fig.10
Locus typicus: Qimugen Formation, Qimugen section, China
Stratum typicum: Late Paleocene
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Original description: [Mao Shaozhi and Norris, 1988, p. 42]:
Diagnosis:
Cyst proximate, circumbicavate. Ambitus elongate, length relatively longer than width, epitract distinctly bigger than hypotract. Apical horn long, protruding. Antapical horns two, typically equal, divergent, with broad bases and pointed distal ends. Periphragm ornamented with coarse granules, tubercules, and cones, giving rise to denticulate lineation of cyst. Endophragm smooth. Endoblast subspherical, its length greater than its width, filling in middle part of pericoel. Cingulum slightly levorotatory, shallow.
Archeopyle intercalary, type (I) formed by loss of 2a, broad hexa style.
Description:
Epitract shaped like an equilateral triangle plus an attenuated apical horn; apical horn long, sinuous, usually 30 to 40 µm long and 8 to 12 µm wide at the base.
Hypotract trapezoid with two divergent claw-like antapical horns wider at bases (24 to 36 µm), 20 to 38 µm long, pointed distally. Endoblast subspherical, occupying middle part of pericoel, giving rise to 0 to 6 µm wide narrow ambital pericoels and well-developed apipericoel and antapipericoels.
Periphragm covered with coarse granules, irregularly shaped, sometimes faintly intratabular, and with tubercules and cones. Tubercules and cones sometimes fused proximally, forming low ridges.
Cingulum marked laterally by ridges and dorsoventrally by aligned granules and tubercules.
Dimensions:
Length 148 to 160 µm (holotype 160 µm), width 68 to 80 µm (holotype 80 µm).
Affinities:
This new subspecies is closely comparable to Ceratiopsis speciosa subsp. glabra. The overall shape of the new subspecies is more elongate than that of the latter, and the periphragm is ornamented with features of low relief rather than being typically smooth.
Now Cerodinium speciosum ssp. elongatum. Originally Ceratiopsis (an illegitimate generic name) speciosa ssp. elongata, subsequently (and now) Cerodinium speciosum ssp. elongatum. The subspecies name Ceratiopsis speciosa ssp. elongata is valid even though the generic name Ceratiopsis is illegitimate.
Holotype: Mao Shaozhi and Norris, 1988, pl.9, fig.10
Locus typicus: Qimugen Formation, Qimugen section, China
Stratum typicum: Late Paleocene
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Original description: [Mao Shaozhi and Norris, 1988, p. 42]:
Diagnosis:
Cyst proximate, circumbicavate. Ambitus elongate, length relatively longer than width, epitract distinctly bigger than hypotract. Apical horn long, protruding. Antapical horns two, typically equal, divergent, with broad bases and pointed distal ends. Periphragm ornamented with coarse granules, tubercules, and cones, giving rise to denticulate lineation of cyst. Endophragm smooth. Endoblast subspherical, its length greater than its width, filling in middle part of pericoel. Cingulum slightly levorotatory, shallow.
Archeopyle intercalary, type (I) formed by loss of 2a, broad hexa style.
Description:
Epitract shaped like an equilateral triangle plus an attenuated apical horn; apical horn long, sinuous, usually 30 to 40 µm long and 8 to 12 µm wide at the base.
Hypotract trapezoid with two divergent claw-like antapical horns wider at bases (24 to 36 µm), 20 to 38 µm long, pointed distally. Endoblast subspherical, occupying middle part of pericoel, giving rise to 0 to 6 µm wide narrow ambital pericoels and well-developed apipericoel and antapipericoels.
Periphragm covered with coarse granules, irregularly shaped, sometimes faintly intratabular, and with tubercules and cones. Tubercules and cones sometimes fused proximally, forming low ridges.
Cingulum marked laterally by ridges and dorsoventrally by aligned granules and tubercules.
Dimensions:
Length 148 to 160 µm (holotype 160 µm), width 68 to 80 µm (holotype 80 µm).
Affinities:
This new subspecies is closely comparable to Ceratiopsis speciosa subsp. glabra. The overall shape of the new subspecies is more elongate than that of the latter, and the periphragm is ornamented with features of low relief rather than being typically smooth.