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Dapsilidinium assamicum
From Fensome et al., 2019:
Dapsilidinium assamicum (Mehrotra, 1983, p.18, pl.5, figs.4,8–9) Lentin and Williams, 1985, p.91. Holotype: Mehrotra, 1983,
pl.5, fig.4. Originally Polysphaeridium, subsequently (and now) Dapsilidinium. Age: early Tertiary.
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Original description: [Mehrotra, 1983]:
Polysphaeridium assamicum sp. nov.
PI. 5, Figs. 4, 8, 9.
HOLOTYPE: PI. 5, Fig. 4; Slide No. 6514.
HORIZON: Mikir and Garampani Limestone Formations.
TYPE LOCALITY : Garampani, North Cachar Hills, Assam.
SPECIFIC DIAGNOSIS: Central body spheroidal-subspheroidal, endophragm granular, periphragm smooth; processes numerous, alike, hollow, slender, distally open, bifurcate.
DIMENSIONS: Holotype - Diameter of central body 60 μ; length of processes 12-30 μ; Range - Diameter of central body 46-82 μ; length of processes 6-20 μ; maximum width 1.5 μ.
NUMBER OF GRAINS EXAMINED : 49
DISTRIBUTION : Very high frequencies Palmaepollenites eocenicus Cenozone of Mikir Formation. The species is also well represented in the Garampani Limestone (Mehrotra, 198la, Mehrotra and Sah, 1982).
COMPARISON : The species can be readily distinguished from Polysphaeridium subtile Davey and Williams (1966, p. 92; Pl. 2, Fig. 1 in Davey et al. 1966) in having larger size range of the central body, granular endophragm and distally bifurcate processes.
Dapsilidinium assamicum (Mehrotra, 1983, p.18, pl.5, figs.4,8–9) Lentin and Williams, 1985, p.91. Holotype: Mehrotra, 1983,
pl.5, fig.4. Originally Polysphaeridium, subsequently (and now) Dapsilidinium. Age: early Tertiary.
---------------------------------------------------------------------------------------------------
Original description: [Mehrotra, 1983]:
Polysphaeridium assamicum sp. nov.
PI. 5, Figs. 4, 8, 9.
HOLOTYPE: PI. 5, Fig. 4; Slide No. 6514.
HORIZON: Mikir and Garampani Limestone Formations.
TYPE LOCALITY : Garampani, North Cachar Hills, Assam.
SPECIFIC DIAGNOSIS: Central body spheroidal-subspheroidal, endophragm granular, periphragm smooth; processes numerous, alike, hollow, slender, distally open, bifurcate.
DIMENSIONS: Holotype - Diameter of central body 60 μ; length of processes 12-30 μ; Range - Diameter of central body 46-82 μ; length of processes 6-20 μ; maximum width 1.5 μ.
NUMBER OF GRAINS EXAMINED : 49
DISTRIBUTION : Very high frequencies Palmaepollenites eocenicus Cenozone of Mikir Formation. The species is also well represented in the Garampani Limestone (Mehrotra, 198la, Mehrotra and Sah, 1982).
COMPARISON : The species can be readily distinguished from Polysphaeridium subtile Davey and Williams (1966, p. 92; Pl. 2, Fig. 1 in Davey et al. 1966) in having larger size range of the central body, granular endophragm and distally bifurcate processes.