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Corradinisphaeridium personatum
Lanternosphaeridium personatum (Corradini, 1973) emend. Masure, 1986
Originally Lanternosphaeridium, subsequently Operculodinium?, thirdly (and now) Corradinisphaeridium.
Holotype: Corradini, 1973, pl.23, fig.6; Masure, 1986, pl.1, figs.1-3, text-figs.1a-b
Locus typicus: Viano, Reggio Emilia, Italy
Stratum typicum: Senonian
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.
Originally Lanternosphaeridium, subsequently Operculodinium?, thirdly (and now) Corradinisphaeridium.
Holotype: Corradini, 1973, pl.23, fig.6; Masure, 1986, pl.1, figs.1-3, text-figs.1a-b
Locus typicus: Viano, Reggio Emilia, Italy
Stratum typicum: Senonian
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.