Back
Pareodinia diceras
Pareodinia diceras (Cookson and Eisenack, 1960b, p.256–257, pl.39, fig.1) Below, 1990, p.65. Emendation: Fisher and Riley, 1980, p.323, as Kalyptea diceras.
NOW Kalyptea. Originally (and now) Kalyptea, subsequently Komewuia, thirdly Pareodinia.
Questionable tax. jr. synonym of Pareodinia ceratophora Deflandre, 1947, according to Gocht, 1970. Lentin and Williams, 1981 retained this species in Kalyptea Cookson and Eisenack, 1960, we follow Lentin and Williams, 1981.
Taxonomic junior synonym: Kalyptea jurassica, according to Below (1990, p.65).
Holotype: Cookson and Eisenack, 1960, pl.39, fig.1
Locus typicus: Canning Basin, W Australia
Stratum typicum: ?Tithonian
Original description: Cookson and Eisenack, 1960, p. 256: Kalyptea diceras
Shell ellipsoidal with apical and antapical horns of unequal length. The apical horn is relatively long, straight or curved, and consists of a short hollow basal region and a longer, and more slender solid apex. The antapical horn is considerably shorter but like the apical horn ends in a solid tip. The membrane of the shell is thin and finely granular; the external membrane in the type specimen is clearly attached to the tip of the apical horn.
Dimensions: Holotype - shell 152 µm long, 47 µm broad; apical horn 48 µm long, antapical horn about 15 µm. Another example 168x33 µm.
Emended diagnosis: Fisher and Reiley, 1980, p. 323: Kalyptea diceras
Cyst elongate to ellipsoidal with apical and antapical horns of unequal length. Cingulum weakly indicated, dividing the cyst unequally, epitract larger than hypotract. Epitract tapering to form a strong, hollow apical horn distally bearing a longer, slender, thread-like apicular structure. No indication of reflected tabulation other than cingular trace and archaeopyle outline. Cyst wall thin, finely granular, type 2I or 3I.
Affinities:
Fisher and Riley, 1980, p. 323: Kalyptea diceras
The specimen described by Ioannides et al. 1976 as Netrelytron sp. is similar to K. diceras in size and cyst outline but differs by the possession of an inner body.
NOW Kalyptea. Originally (and now) Kalyptea, subsequently Komewuia, thirdly Pareodinia.
Questionable tax. jr. synonym of Pareodinia ceratophora Deflandre, 1947, according to Gocht, 1970. Lentin and Williams, 1981 retained this species in Kalyptea Cookson and Eisenack, 1960, we follow Lentin and Williams, 1981.
Taxonomic junior synonym: Kalyptea jurassica, according to Below (1990, p.65).
Holotype: Cookson and Eisenack, 1960, pl.39, fig.1
Locus typicus: Canning Basin, W Australia
Stratum typicum: ?Tithonian
Original description: Cookson and Eisenack, 1960, p. 256: Kalyptea diceras
Shell ellipsoidal with apical and antapical horns of unequal length. The apical horn is relatively long, straight or curved, and consists of a short hollow basal region and a longer, and more slender solid apex. The antapical horn is considerably shorter but like the apical horn ends in a solid tip. The membrane of the shell is thin and finely granular; the external membrane in the type specimen is clearly attached to the tip of the apical horn.
Dimensions: Holotype - shell 152 µm long, 47 µm broad; apical horn 48 µm long, antapical horn about 15 µm. Another example 168x33 µm.
Emended diagnosis: Fisher and Reiley, 1980, p. 323: Kalyptea diceras
Cyst elongate to ellipsoidal with apical and antapical horns of unequal length. Cingulum weakly indicated, dividing the cyst unequally, epitract larger than hypotract. Epitract tapering to form a strong, hollow apical horn distally bearing a longer, slender, thread-like apicular structure. No indication of reflected tabulation other than cingular trace and archaeopyle outline. Cyst wall thin, finely granular, type 2I or 3I.
Affinities:
Fisher and Riley, 1980, p. 323: Kalyptea diceras
The specimen described by Ioannides et al. 1976 as Netrelytron sp. is similar to K. diceras in size and cyst outline but differs by the possession of an inner body.