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Deflandrea asymmetrica*
Deflandrea asymmetrica Davey and Verdier, 1971
Name illegitimate. Jr. homonym of Deflandrea asymmetrica Wilson, 1967.
Now Subtilisphaera deformans. Originally Deflandrea asymmetrica (an illegitimate species name), subsequently Deflandrea deformans, thirdly (and now) Subtilisphaera deformans. See also Subtilisphaera asymmetrica (combination illegitimate) and Deflandrea daveyi (name illegitimate).
Lentin and Williams, 1976, reasoned that with the transfer of this species from Deflandrea to Subtilisphaera Jain and Millepied, 1973, the original name was no longer a jr, homonym; therefore the nom. subst., Deflandrea daveyi Lentin and Williams, 1973 and Deflandrea deformans Davey and Verdier, 1973, became superfluous. Since Deflandrea asymmetrica was illegitimate when proposed, Stover and Evitt, 1978, pointed out that this was an incorrect procedure.
Holotype: Davey and Verdier, 1971, pl.2, fig.6
Age: Middle Albian
Original description (Davey and Verdier, 1971)
Thin walled cyst with spherical to ovoidal inner body and loosely fitting, smooth to lightly granular outer membrane. Inner body asymmetrically placed within the outer membrane, which is produced into a large apical horn and typically one antapical horn. Cingulum always present, represented by low ridges. Archaeopyle not visible.
Holotype: Slide 70/12, Côtes Noires de Moeslains, middle Albian, France.
Paratype: Slide 67/1 Côtes Noires de Moeslains, Middle Albian, France.
Dimensions: Overall length holotype: 58 µ; paratype 71 µ; Range 58 (71.4)80 µ
Overall width holotype: 43 µ; paratype: 40 µ; Range 40 (46.2)61 µ
Description: The inner body is typically attached laterally to one side of the outer membrane, the other side remaining free. The cyst has an asymmetrical appearance since the inner body is not located centrally. The apical horn is a broad prolongation of the outer membrane is similarly detached from the inner body and forms one, assymmetrically placed, subconical horn. This species is relatively thin walled and the type material does not stain with safranin.
Remarks: D. assymmetrica may be compared with the genus Dingodinium Cookson & Eisenack 1958. The latter, however, does not possess an antapical horn and the apical horn is typically longer. It may be distinguished from Deflandrea pirnaensis Alberti 1959 by the displaced position of the inner body and the broad apical horn.
Name illegitimate. Jr. homonym of Deflandrea asymmetrica Wilson, 1967.
Now Subtilisphaera deformans. Originally Deflandrea asymmetrica (an illegitimate species name), subsequently Deflandrea deformans, thirdly (and now) Subtilisphaera deformans. See also Subtilisphaera asymmetrica (combination illegitimate) and Deflandrea daveyi (name illegitimate).
Lentin and Williams, 1976, reasoned that with the transfer of this species from Deflandrea to Subtilisphaera Jain and Millepied, 1973, the original name was no longer a jr, homonym; therefore the nom. subst., Deflandrea daveyi Lentin and Williams, 1973 and Deflandrea deformans Davey and Verdier, 1973, became superfluous. Since Deflandrea asymmetrica was illegitimate when proposed, Stover and Evitt, 1978, pointed out that this was an incorrect procedure.
Holotype: Davey and Verdier, 1971, pl.2, fig.6
Age: Middle Albian
Original description (Davey and Verdier, 1971)
Thin walled cyst with spherical to ovoidal inner body and loosely fitting, smooth to lightly granular outer membrane. Inner body asymmetrically placed within the outer membrane, which is produced into a large apical horn and typically one antapical horn. Cingulum always present, represented by low ridges. Archaeopyle not visible.
Holotype: Slide 70/12, Côtes Noires de Moeslains, middle Albian, France.
Paratype: Slide 67/1 Côtes Noires de Moeslains, Middle Albian, France.
Dimensions: Overall length holotype: 58 µ; paratype 71 µ; Range 58 (71.4)80 µ
Overall width holotype: 43 µ; paratype: 40 µ; Range 40 (46.2)61 µ
Description: The inner body is typically attached laterally to one side of the outer membrane, the other side remaining free. The cyst has an asymmetrical appearance since the inner body is not located centrally. The apical horn is a broad prolongation of the outer membrane is similarly detached from the inner body and forms one, assymmetrically placed, subconical horn. This species is relatively thin walled and the type material does not stain with safranin.
Remarks: D. assymmetrica may be compared with the genus Dingodinium Cookson & Eisenack 1958. The latter, however, does not possess an antapical horn and the apical horn is typically longer. It may be distinguished from Deflandrea pirnaensis Alberti 1959 by the displaced position of the inner body and the broad apical horn.