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Raphidodinium apicopaucicum
Raphidodinium apicopaucicum (Habib, 1973) Below, 1987
Now Druggidum. Originally (and now) Druggidium, subsequently Raphidodinium. Lentin and Williams, 1989 retained this species in Druggidium.
Holotype: Habib, 1973, pl.1, fig.3 ; text-fig. 3
Locus typicus: DSDP-site 105, Hatteras Abyssal Plain
Stratum typicum: Berriasian- Barremian
Original diagnosis: Habib, 1973, p.51: Druggidium apicopaucicum
Small proximate dinoflagellate cysts with shape that for genus. Average C.I. is 21; range from 19 to 25. Average W. L. R. is 0.66; range from 0.64 to 0.70. Tabulation, archeopyle, and operculum as for genus. The tabulation is clearly expressed. Plate boundaries occur as crenulated septa or ridges that are smooth or radially striate and/or perforate. The crenulated septa (Pl. 3, fig. 2) are always present on the ventral tract and commonly on the dorsal. The opercular pieces are adherent at the cingulum in 90 percent of examples. Tract surface is smooth to scabrate, or microgranulate. Forty measured specimens range in maximum diameter from 31 to 44 µm.
Description: Habib, 1973, p.51: Druggidium apicopaucicum
The characteristics of cyst tabulation given for the genus are best expressed in Druggidium apicopaucicum, because of the lack of concealing tract texture. In a few examples, the plate ridges are discontinuous, especially near the sulcus, but can be traced through the alignment of discrete verrucae.
Now Druggidum. Originally (and now) Druggidium, subsequently Raphidodinium. Lentin and Williams, 1989 retained this species in Druggidium.
Holotype: Habib, 1973, pl.1, fig.3 ; text-fig. 3
Locus typicus: DSDP-site 105, Hatteras Abyssal Plain
Stratum typicum: Berriasian- Barremian
Original diagnosis: Habib, 1973, p.51: Druggidium apicopaucicum
Small proximate dinoflagellate cysts with shape that for genus. Average C.I. is 21; range from 19 to 25. Average W. L. R. is 0.66; range from 0.64 to 0.70. Tabulation, archeopyle, and operculum as for genus. The tabulation is clearly expressed. Plate boundaries occur as crenulated septa or ridges that are smooth or radially striate and/or perforate. The crenulated septa (Pl. 3, fig. 2) are always present on the ventral tract and commonly on the dorsal. The opercular pieces are adherent at the cingulum in 90 percent of examples. Tract surface is smooth to scabrate, or microgranulate. Forty measured specimens range in maximum diameter from 31 to 44 µm.
Description: Habib, 1973, p.51: Druggidium apicopaucicum
The characteristics of cyst tabulation given for the genus are best expressed in Druggidium apicopaucicum, because of the lack of concealing tract texture. In a few examples, the plate ridges are discontinuous, especially near the sulcus, but can be traced through the alignment of discrete verrucae.