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Ceratiopsis
From Williams et al., 2017:
[Ceratiopsis, Vozzhennikova, 1963, p. 181; Emendation: Bujak et al., 1980, p. 27
Type species: Ceratiopsis leptoderma, Vozzhennikova, 1967 (text-fig.8)]
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Original description: [Vozzhennikova, 1963]: (Translation: Lees in Sarjeant, 1971, p. 245-246):
Description:
Theca elongate oval with well developed apical and antapical horns, the size of which are variable. Transverse furrow shallow, annulate, equatorial, dividing the theca into almost equal parts. Longitudinal furrow situated on the hypotheca and extending to the antapex. Internal body large, elliptical or ovoid, coloured deep yellow or pale brown, its surface smooth or finely granular. Theca coloured, thinwalled, delicate transparent and closely adpressed to the internal body. Pylome large, rounded trapeziform and situated below the transverse furrow where it corresponds in position to the third anterior equatorial plate. More rarely the pylome is not developed.
Affinities:
This differs from other genera in having a more elongated theca, a very large pylome which is situated in the equatorial part of the theca, and a distinctive outline.
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Emended description:
Bujak et al, 1980:
Diagnosis:
Pericyst ambitus rounded, ovoidal, pentagonal or peridinioid, elongated longitudinally, and produced into one distinct apical and two distinct antapical horns. The antapical horns are of approximately equal length. Endocyst spherical to ovoidal, or occasionally weakly peridinioid. Apical and antapical pericoels always present, sometimes connected by an ambital pericoel.
Periphragm smooth, chagrinate, granulate, denticulate, rugulate, verrucate, or striate, the ornament commonly being aligned longitudinally. Endophragm smooth, chagrinate, or granulate.
Paratabulation not evident.
Pericingulum present, commonly indented and planar or slightly helicoidal.
Perisulcus, when visible, longer and broader on the hypocyst.
Endocingulum and endosulcus not observed.
Periarchaeopyle intercalary, involving the second anterior intercalary paraplate (2a), hexa, with the archaeopyle length approximately equal to the breadth.
Perioperculum typically detached.
Endoarchaeopyle intercalary, involving between one and three of the anterior intercalary paraplates (la-3a).
Endoperculum detached or remaining partially attached.
Archaeopyle formula I/I (2a/2a) to I/3I (2a/la-3a).
[Ceratiopsis, Vozzhennikova, 1963, p. 181; Emendation: Bujak et al., 1980, p. 27
Type species: Ceratiopsis leptoderma, Vozzhennikova, 1967 (text-fig.8)]
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Original description: [Vozzhennikova, 1963]: (Translation: Lees in Sarjeant, 1971, p. 245-246):
Description:
Theca elongate oval with well developed apical and antapical horns, the size of which are variable. Transverse furrow shallow, annulate, equatorial, dividing the theca into almost equal parts. Longitudinal furrow situated on the hypotheca and extending to the antapex. Internal body large, elliptical or ovoid, coloured deep yellow or pale brown, its surface smooth or finely granular. Theca coloured, thinwalled, delicate transparent and closely adpressed to the internal body. Pylome large, rounded trapeziform and situated below the transverse furrow where it corresponds in position to the third anterior equatorial plate. More rarely the pylome is not developed.
Affinities:
This differs from other genera in having a more elongated theca, a very large pylome which is situated in the equatorial part of the theca, and a distinctive outline.
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Emended description:
Bujak et al, 1980:
Diagnosis:
Pericyst ambitus rounded, ovoidal, pentagonal or peridinioid, elongated longitudinally, and produced into one distinct apical and two distinct antapical horns. The antapical horns are of approximately equal length. Endocyst spherical to ovoidal, or occasionally weakly peridinioid. Apical and antapical pericoels always present, sometimes connected by an ambital pericoel.
Periphragm smooth, chagrinate, granulate, denticulate, rugulate, verrucate, or striate, the ornament commonly being aligned longitudinally. Endophragm smooth, chagrinate, or granulate.
Paratabulation not evident.
Pericingulum present, commonly indented and planar or slightly helicoidal.
Perisulcus, when visible, longer and broader on the hypocyst.
Endocingulum and endosulcus not observed.
Periarchaeopyle intercalary, involving the second anterior intercalary paraplate (2a), hexa, with the archaeopyle length approximately equal to the breadth.
Perioperculum typically detached.
Endoarchaeopyle intercalary, involving between one and three of the anterior intercalary paraplates (la-3a).
Endoperculum detached or remaining partially attached.
Archaeopyle formula I/I (2a/2a) to I/3I (2a/la-3a).