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Australiella victoriensis
Australiella victoriensis, (Cookson and Manum, 1964), Lentin and Williams, 1973; Emendation as Chatangiella victoriensis: Lebedeva in Ilyina et al., 1994, p.67
Now Chatangiella. Originally Deflandrea, subsequently Australiella, thirdly (and now) Chatangiella.
Holotype: Cookson and Manum, 1964, pl.76, fig.3,4
Locus typicus: Victoria, Australia
Stratum typicum: Senonian
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Original description as Deflandrea victonensis: [Cookson and Manum, 1964, p. 522]:
Description:
The theca is elongate and divided approximately equally by a slightly laevo-rotatory girdle, the borders of which are interrupted dorsally at some distance on either side of the mid-line of the theca and ventrally near the lateral margins. The middle portion of the theca is conspicuously convex when viewed dorsoventrally and is filled with a large capsule. Above the upper limit of the capsule the theca bulges to varying degrees. The apex is rounded and the apical horn broadly triangular. The hypothecal portion below the lower limit of the capsule is of almost uniform width or slightly widened towards the antapex, which is more or less obliquely truncate with the longer left-hand side usually terminating in a short, pointed horn. The wall of the theca is c. 1.0-1.7 µm thick and ornamented with fairly evenly scattered rod-like projections c. 0.5-1.5 µm long; in surface view the rods appear as dots usually between 0.5 and 1.0 µm in diameter but a few smaller and larger ones are usually present. The girdle is bordered by conspicuous ridges or by linearly arranged wart-like thickenings of varying size and shape. The wall of the capsule varies in thickness, being thinnest, less than 1 µm, where it is in contact with the theca and thicker, over 1 µm, in both anterior and posterior regions where it is also more conspicuously granular. The intercalary archeopyle is rounded to equilaterally hexagonal.
Dimensions:
Range: overall length 76-116 µm, width 49-73 µm. Average of 57 examples 98.0x 59.5 µm.
Now Chatangiella. Originally Deflandrea, subsequently Australiella, thirdly (and now) Chatangiella.
Holotype: Cookson and Manum, 1964, pl.76, fig.3,4
Locus typicus: Victoria, Australia
Stratum typicum: Senonian
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Original description as Deflandrea victonensis: [Cookson and Manum, 1964, p. 522]:
Description:
The theca is elongate and divided approximately equally by a slightly laevo-rotatory girdle, the borders of which are interrupted dorsally at some distance on either side of the mid-line of the theca and ventrally near the lateral margins. The middle portion of the theca is conspicuously convex when viewed dorsoventrally and is filled with a large capsule. Above the upper limit of the capsule the theca bulges to varying degrees. The apex is rounded and the apical horn broadly triangular. The hypothecal portion below the lower limit of the capsule is of almost uniform width or slightly widened towards the antapex, which is more or less obliquely truncate with the longer left-hand side usually terminating in a short, pointed horn. The wall of the theca is c. 1.0-1.7 µm thick and ornamented with fairly evenly scattered rod-like projections c. 0.5-1.5 µm long; in surface view the rods appear as dots usually between 0.5 and 1.0 µm in diameter but a few smaller and larger ones are usually present. The girdle is bordered by conspicuous ridges or by linearly arranged wart-like thickenings of varying size and shape. The wall of the capsule varies in thickness, being thinnest, less than 1 µm, where it is in contact with the theca and thicker, over 1 µm, in both anterior and posterior regions where it is also more conspicuously granular. The intercalary archeopyle is rounded to equilaterally hexagonal.
Dimensions:
Range: overall length 76-116 µm, width 49-73 µm. Average of 57 examples 98.0x 59.5 µm.