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Deflandrea deformans
Deflandrea deformans Davey and Verdier, 1973, nom. subst. pro Deflandrea asymmetrica Davey and Verdier, 1971, non Deflandrea asymmetrica Wilson, 1967
Nomencl. sr. synonym of Deflandrea daveyi Lentin and Williams, 1973
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 the species from Deflandrea to Subtilisphaera Jain and Millepied, 1973, the original name Deflandrea asymmetrica was no longer a junior homonym; therefore the nom. subst. Deflandrea deformans became superfluous. Stover and Evitt (1978, p.239) correctly retained the species as Subtilisphaera deformans.
Holotype: Davey and Verdier, 1971, pl.2, fig.6
Age: Middle Albian
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Taxonomica note, Davey and Verdier 1973 , p. 197:
It has kindly been pointed out to the authors, by Dr. A. R. Loeblich Jr. (personal communication), that Deflandrea asymmetrica of Davey & Verdier 1971 is a junior homonym of D. asymmetrica Wilson 1967. This error is here rectified. Deflandrea deforrnans sp. nov. = Deflandrea asymmetrica of Davey & Verdier 1971, P. 39, 40, pl. 2, figs. 4,6.
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Original diagnosis: Davey and Verdier 1971, p. 39: Deflandrea asymmatrica
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.
Dimensions:Holotype - Paratype - Range
Overall length 58 µ - 71 µ - 58 (71.4) 80µ
Overall width 43 µ - 40 µ - 40 (46.2) 61µ
Original description: Davey and Verdier 1971, p. 39: Deflandrea asymmatrica
The inner body is typically attached laterally to one side of the outer Inembrane, 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 and is often distorted. In the antapical region the outer membrane is similarly detached from the inner body and forms one, asymmetrically placed, subconical horn. This species is relatively thin walled and the type material does not stain with safranin.
Remarks: D. assymmetrica sp. nov. may be conpared 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.
Nomencl. sr. synonym of Deflandrea daveyi Lentin and Williams, 1973
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 the species from Deflandrea to Subtilisphaera Jain and Millepied, 1973, the original name Deflandrea asymmetrica was no longer a junior homonym; therefore the nom. subst. Deflandrea deformans became superfluous. Stover and Evitt (1978, p.239) correctly retained the species as Subtilisphaera deformans.
Holotype: Davey and Verdier, 1971, pl.2, fig.6
Age: Middle Albian
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Taxonomica note, Davey and Verdier 1973 , p. 197:
It has kindly been pointed out to the authors, by Dr. A. R. Loeblich Jr. (personal communication), that Deflandrea asymmetrica of Davey & Verdier 1971 is a junior homonym of D. asymmetrica Wilson 1967. This error is here rectified. Deflandrea deforrnans sp. nov. = Deflandrea asymmetrica of Davey & Verdier 1971, P. 39, 40, pl. 2, figs. 4,6.
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Original diagnosis: Davey and Verdier 1971, p. 39: Deflandrea asymmatrica
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.
Dimensions:Holotype - Paratype - Range
Overall length 58 µ - 71 µ - 58 (71.4) 80µ
Overall width 43 µ - 40 µ - 40 (46.2) 61µ
Original description: Davey and Verdier 1971, p. 39: Deflandrea asymmatrica
The inner body is typically attached laterally to one side of the outer Inembrane, 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 and is often distorted. In the antapical region the outer membrane is similarly detached from the inner body and forms one, asymmetrically placed, subconical horn. This species is relatively thin walled and the type material does not stain with safranin.
Remarks: D. assymmetrica sp. nov. may be conpared 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.