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Corradinisphaeridium personatum
From Fensome et al., 2019:
Lanternosphaeridium personatum (Corradini, 1973, p.157, pl.23, figs.5–6) Masure, 1986, p.110–112. Emendation: Masure, 1986, p.110–111, as Corradinisphaeridium personatum. Holotype: Corradini, 1973, pl.23, fig.6; Eisenack and Kjellström, 1981b, p.770f; Masure, 1986, pl.1, figs.1–3; text-figs.1a–b; Fensome et al., 1995, figs.1–3,5–7 — p.1663. Originally Lanternosphaeridium, subsequently Operculodinium?, thirdly (and now) Corradinisphaeridium. Age: Senonian.
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Original diagnosis: Corradini, 1973, p. 157: Lanternosphaeridium personatum
Test with ovoidal central body. Smooth, thin endophragm; periphragm smooth to lightly granular. Processes different in shape, some being typically short and stocky. Distinctive polarity expressed by the apical and antapical processes and by the horns of the inner body.
Archeopyle formed by the loss of two precingular plates.
Dimensions--Holotype: diameter of the central body 66x80Á, length of the processes 14-33 Ám. Range: diameter of the central body 62-66x70-80 Ám, length of the processes 12-33 Ám.
Original description: Corradini, 1973, p. 157: Lanternosphaeridium personatum
The number of the processes normally varies between 30 and 40. The solid processes, arising from the periphragm are typically heterogeneous in shape. The longest are simple, tapering gradually to the apex, distally blunted; some processes have broad taeniate bases, which are more or less digitate distally. Some others are branched medially and have a characteristic Y-shape.
All the processes have normally fairly broad bases, well marked on the surface of the central body. Apical process strong, medially branched in two or more simple, bifurcate or digitate appendages, distally blunted or acuminate. Antapical process broad and digitate.
The small polar outbulges of the inner body protrude into the broad bases of the apical and antapical processes.
The precingular archeopyle is formed by the removal of two dorsal plates.
Affinities:
Corradini, 1973, p. 157: Lanternosphaeridium personatum
L. personatum is distinguished from all previously described species of Lanternosphaeridium by the characteristic heterogeneous form of the processes.
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Emendation by Masure, 1986 (translated from French):
Emended diagnosis: Skolochorate dinoflagellate cyst with an ellipsoidal body, extended by apical and antapical protrusions, surmounted by a process. Wall composed of a closely attached endophragm and periphragm. Non-fibrous, solid, cylindrical to lamelliform processes, simple or branched, at different levels. Internal length equal to half the equatorial diameter of the central body. Intratabular distribution of processes, with one or two processes at the center of each paraplate.
Paratabulation formula of processes: 1-2? pr, 4', 6", 5-6c, 5-6'", 0-1p, 1"", xs.
Deduced paratabulation: gonyaulacoid.
Precingulate archaeopyle 2P formed by the loss of the 2" and 3" paraplates in the Kofoid system. Taylor-Evitt formula of the archaeopyle: 2 P 3-4.
Free opercular parts.
Emended description: Skolochorate dinoflagellate cyst with an ellipsoidal to fusiform central body, elongated vertically, extended by apical and antapical protrusions surmounted by a process. Epicyst and hypocyst of comparable size. Wall composed of a closely adjacent endophragm and periphragm. Non-fibrous wall, compact or with microcavities. The cyst surface can be smooth or microperforated. The processes, non-fibrous and solid, are intrabular, one or two adorning the center of each paraplate. They are generally cylindrical, simple or branched, and taper towards their distal end, which is capitate. Their length is less than or equal to half the equatorial diameter of the central body. The preapical process is branched. Apical processes B and C join its base. Processes A and 1u are isolated. There are one or two precingulate processes per paraplate. When there is only one, its base of insertion is oblong and vertically elongated. When there are two, their base of insertion is circular. The cingulate processes are simple or branched. Process au is frequently very developed and lamelliform. Postcingulate paraplates III, IV, and V generally bear only one process, and these processes are offset towards the antapex. Antapical process Y is branched.
Dimensions (according to Corradini):
Holotype:
-- Central body, height: 80 μm
width: 66 μm
-- Process length: 14-33 μm
-- Processes included, height: 113 μm
width: 95 μm
Extremes (measurements on 22 individuals):
-- Central body, height: 70-80 μm
width: 62-66 μm
-- Process length: 12-33 μm
Lanternosphaeridium personatum (Corradini, 1973, p.157, pl.23, figs.5–6) Masure, 1986, p.110–112. Emendation: Masure, 1986, p.110–111, as Corradinisphaeridium personatum. Holotype: Corradini, 1973, pl.23, fig.6; Eisenack and Kjellström, 1981b, p.770f; Masure, 1986, pl.1, figs.1–3; text-figs.1a–b; Fensome et al., 1995, figs.1–3,5–7 — p.1663. Originally Lanternosphaeridium, subsequently Operculodinium?, thirdly (and now) Corradinisphaeridium. Age: Senonian.
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Original diagnosis: Corradini, 1973, p. 157: Lanternosphaeridium personatum
Test with ovoidal central body. Smooth, thin endophragm; periphragm smooth to lightly granular. Processes different in shape, some being typically short and stocky. Distinctive polarity expressed by the apical and antapical processes and by the horns of the inner body.
Archeopyle formed by the loss of two precingular plates.
Dimensions--Holotype: diameter of the central body 66x80Á, length of the processes 14-33 Ám. Range: diameter of the central body 62-66x70-80 Ám, length of the processes 12-33 Ám.
Original description: Corradini, 1973, p. 157: Lanternosphaeridium personatum
The number of the processes normally varies between 30 and 40. The solid processes, arising from the periphragm are typically heterogeneous in shape. The longest are simple, tapering gradually to the apex, distally blunted; some processes have broad taeniate bases, which are more or less digitate distally. Some others are branched medially and have a characteristic Y-shape.
All the processes have normally fairly broad bases, well marked on the surface of the central body. Apical process strong, medially branched in two or more simple, bifurcate or digitate appendages, distally blunted or acuminate. Antapical process broad and digitate.
The small polar outbulges of the inner body protrude into the broad bases of the apical and antapical processes.
The precingular archeopyle is formed by the removal of two dorsal plates.
Affinities:
Corradini, 1973, p. 157: Lanternosphaeridium personatum
L. personatum is distinguished from all previously described species of Lanternosphaeridium by the characteristic heterogeneous form of the processes.
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Emendation by Masure, 1986 (translated from French):
Emended diagnosis: Skolochorate dinoflagellate cyst with an ellipsoidal body, extended by apical and antapical protrusions, surmounted by a process. Wall composed of a closely attached endophragm and periphragm. Non-fibrous, solid, cylindrical to lamelliform processes, simple or branched, at different levels. Internal length equal to half the equatorial diameter of the central body. Intratabular distribution of processes, with one or two processes at the center of each paraplate.
Paratabulation formula of processes: 1-2? pr, 4', 6", 5-6c, 5-6'", 0-1p, 1"", xs.
Deduced paratabulation: gonyaulacoid.
Precingulate archaeopyle 2P formed by the loss of the 2" and 3" paraplates in the Kofoid system. Taylor-Evitt formula of the archaeopyle: 2 P 3-4.
Free opercular parts.
Emended description: Skolochorate dinoflagellate cyst with an ellipsoidal to fusiform central body, elongated vertically, extended by apical and antapical protrusions surmounted by a process. Epicyst and hypocyst of comparable size. Wall composed of a closely adjacent endophragm and periphragm. Non-fibrous wall, compact or with microcavities. The cyst surface can be smooth or microperforated. The processes, non-fibrous and solid, are intrabular, one or two adorning the center of each paraplate. They are generally cylindrical, simple or branched, and taper towards their distal end, which is capitate. Their length is less than or equal to half the equatorial diameter of the central body. The preapical process is branched. Apical processes B and C join its base. Processes A and 1u are isolated. There are one or two precingulate processes per paraplate. When there is only one, its base of insertion is oblong and vertically elongated. When there are two, their base of insertion is circular. The cingulate processes are simple or branched. Process au is frequently very developed and lamelliform. Postcingulate paraplates III, IV, and V generally bear only one process, and these processes are offset towards the antapex. Antapical process Y is branched.
Dimensions (according to Corradini):
Holotype:
-- Central body, height: 80 μm
width: 66 μm
-- Process length: 14-33 μm
-- Processes included, height: 113 μm
width: 95 μm
Extremes (measurements on 22 individuals):
-- Central body, height: 70-80 μm
width: 62-66 μm
-- Process length: 12-33 μm