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Andalusiella dubia
Andalusiella? dubia, (Jain and Millepied, 1973), Lentin and Williams, 1980; Emendation as as Andalusiella dubia. : Masure et al., 1996, p.180
Originally Senegalinium, subsequently Deflandrea, thirdly Deflandrea?, fourthly Andalusiella?, fifthly (and now) Andalusiella. Questionable assignment: Lentin and Williams (1980, p.41) - however, Masure et al. (1996, p.180) included the species in Andalusiella without question.
Basionym: Senegalinium dubium Jain and Millepied, 1973, Palaeobotanist, 20: 25, plate 2, 12, 13;
Age: Maastrichtian.
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Original description as Senegalium dubium: [Jain and Millepied 1973, p. 25]:
Diagnosis:
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.
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 verrucae.
Affinities/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.
Dimensions:
Holotype: Shell 84 µm in diameter; Girdle 6.5 µm broad; Apical horn 6.5 X 6.5 µm in size; Wall thickness 1.5 µm.
Range: Shell 80-85 µm in diameter; Girdle 6-6.5 µm broad; Apical horn 5-7 µm long and broad; Wall thickness 1-1.5 µm.
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Emended diagnosis:
Masure, Tea and Yao 1996, p. 180:
Diagnosis:
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.
Originally Senegalinium, subsequently Deflandrea, thirdly Deflandrea?, fourthly Andalusiella?, fifthly (and now) Andalusiella. Questionable assignment: Lentin and Williams (1980, p.41) - however, Masure et al. (1996, p.180) included the species in Andalusiella without question.
Basionym: Senegalinium dubium Jain and Millepied, 1973, Palaeobotanist, 20: 25, plate 2, 12, 13;
Age: Maastrichtian.
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Original description as Senegalium dubium: [Jain and Millepied 1973, p. 25]:
Diagnosis:
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.
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 verrucae.
Affinities/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.
Dimensions:
Holotype: Shell 84 µm in diameter; Girdle 6.5 µm broad; Apical horn 6.5 X 6.5 µm in size; Wall thickness 1.5 µm.
Range: Shell 80-85 µm in diameter; Girdle 6-6.5 µm broad; Apical horn 5-7 µm long and broad; Wall thickness 1-1.5 µm.
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Emended diagnosis:
Masure, Tea and Yao 1996, p. 180:
Diagnosis:
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.