Back
Deflandrea dubia
Deflandrea? dubia (Jain and Millepied, 1973) Herngreen, 1975, p.61. Emendation: Masure et al., 1996, p.180, as Andalusiella dubia.
Holotype: Jain and Millepied, 1973, pl.2, fig.13.
Now Andalusiella. Originally Senegalinium, subsequently Deflandrea, thirdly Deflandrea?, fourthly Andalusiella?, fifthly (and now) Andalusiella. Questionable assignment: Lentin and Williams (1976, p.40). Age: Maastrichtian.
Original diagnosis Jain and Millepied 1973, p. 25: Senegalium dubium
Shell ovoid to spherical, non-tabulate, non-cavate, zone of contact around equator large. Transverse furrow distinct; longitudinal furrow present or absent. Endophragm smooth, periphragm ornamented, baculo-verrucose. Apical horn short; antapical horns absent or represented only by slight thickenings. Archeopyle large, intercalary, below apical horn, trapezoidal.
Dimensions: Holotype: Shell 84µ in diameter; Girdle 6.5Á broad; Apical horn 6.5 X 6.5 µ in size; Wall thickness 1.5µ. Range: Shell 80-85µ in diameter; Girdle 6-6.5µ broad; Apical horn 5-7µ long and broad; Wall thickness 1-1.5µ.
Description: Epitract and hypotract almost equal in size. Large size of archeopyle gives an indication of its precingular position; beculae formed on periphragm have slightly concave tips, some times fused to form varrucae.
Comparison: Forms described under Geiselodinium miocenicum Nagy (1967) compare closely with Senegalium dubium sp. nov. in having similar shape and large zone of contact between peri- and endophragm, but readily differs in lack of an archeopyle. S. dubium is different from other species of the genus in having rudimentary antapical horns and baculoverrucose periphragm ornamentation.
--------------------------------------------------------------
Emended diagnosis: Masure, Tea and Yao 1996, p. 180:
Proximate, acrocavate dinoflagellate cyst with ovoidal to spheroidal brown or colorless central body, short apical and short left antapical horn with reduced or absent right antapical horn. Wall composed of a baculo-verrucosed periphragm and smooth brown endophragm with thickening at the base of the horns. Peridinoid paratabulation indicated by margin of the archeopyle. Paracingulum slightly descending ( Evitt, 1985), levorotatory bordered by verrucosa, parasulcus with bean-shaped flagellar scar. Intercalary archeopyle of I/I type, standard 2a hexa, eurydeltaform (Evitt, 1985, p. 134). Operculum free, monoplacoid, occasionaly adherent.
New repository: Museum National d'Histoire Naturelle de Paris.
-----------------------------------------------------------------
Holotype: Jain and Millepied, 1973, pl.2, fig.13.
Now Andalusiella. Originally Senegalinium, subsequently Deflandrea, thirdly Deflandrea?, fourthly Andalusiella?, fifthly (and now) Andalusiella. Questionable assignment: Lentin and Williams (1976, p.40). Age: Maastrichtian.
Original diagnosis Jain and Millepied 1973, p. 25: Senegalium dubium
Shell ovoid to spherical, non-tabulate, non-cavate, zone of contact around equator large. Transverse furrow distinct; longitudinal furrow present or absent. Endophragm smooth, periphragm ornamented, baculo-verrucose. Apical horn short; antapical horns absent or represented only by slight thickenings. Archeopyle large, intercalary, below apical horn, trapezoidal.
Dimensions: Holotype: Shell 84µ in diameter; Girdle 6.5Á broad; Apical horn 6.5 X 6.5 µ in size; Wall thickness 1.5µ. Range: Shell 80-85µ in diameter; Girdle 6-6.5µ broad; Apical horn 5-7µ long and broad; Wall thickness 1-1.5µ.
Description: Epitract and hypotract almost equal in size. Large size of archeopyle gives an indication of its precingular position; beculae formed on periphragm have slightly concave tips, some times fused to form varrucae.
Comparison: Forms described under Geiselodinium miocenicum Nagy (1967) compare closely with Senegalium dubium sp. nov. in having similar shape and large zone of contact between peri- and endophragm, but readily differs in lack of an archeopyle. S. dubium is different from other species of the genus in having rudimentary antapical horns and baculoverrucose periphragm ornamentation.
--------------------------------------------------------------
Emended diagnosis: Masure, Tea and Yao 1996, p. 180:
Proximate, acrocavate dinoflagellate cyst with ovoidal to spheroidal brown or colorless central body, short apical and short left antapical horn with reduced or absent right antapical horn. Wall composed of a baculo-verrucosed periphragm and smooth brown endophragm with thickening at the base of the horns. Peridinoid paratabulation indicated by margin of the archeopyle. Paracingulum slightly descending ( Evitt, 1985), levorotatory bordered by verrucosa, parasulcus with bean-shaped flagellar scar. Intercalary archeopyle of I/I type, standard 2a hexa, eurydeltaform (Evitt, 1985, p. 134). Operculum free, monoplacoid, occasionaly adherent.
New repository: Museum National d'Histoire Naturelle de Paris.
-----------------------------------------------------------------