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Micrhystridium suemegense
Micrhystridium suemegense Góczán, 1962, p.192, pl.2, figs.12–14.
Acritarch species
NOW Chlamydophorella?. Originally Micrhystridium, subsequently (and now) Chlamydophorella?.
Holotype: Góczán, 1962, pl.2, figs.12–14.
Age: early Aptian.
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Original description: [Góczán, 1962, p. 192] (Translation from Hungarian with Google Translate):
Micrhystridium sümegense nov. sp.
(Plate II, Fig. 1 2 -1 4 .)
Derivatio nominis: from the Sümeg site.
Holotype: Plate II, Fig. 12 — 14. Catalogue number: Sp. 1/6.
Locus typicus: Sümeg 1. borehole
Stratum typicum: Upper Aptian
Diagnosis: the shell may have been originally spherical, but appears oval due to the cleavage clearly visible in the figure. The edge of the shell and the entire surface are densely covered with processes 2—3 microns apart, stubby at their base, 3 microns long and 1 - 1½ microns thick, with forked flagella at the ends. The flagella touch and surround the one-micron-thick shell parallel to it, like a veil. Color light brown. Number of specimens examined 1.
Size: 39 microns long and 35 microns wide without spines.
Locality: Sümeg 1st borehole, 248.50—249.40 m from dark gray crinoid limestone.
Note: our specimen shows the greatest similarity to the species M. ambiguum Defl. . However, it differs from it by the size of the body and the relatively shorter and more densely arranged processes. Deflandre explained in the description of the genus that the forms belonging to this genus are under 20 microns. However, in the description of M. ambiguum he mentions that the central diameter of this species can reach 27—28 microns. Otherwise, the arrangement of the morphological characters of this species is completely identical to that of our species.
After the above, I believe that even though it differs in size from all known species of the genus, we are right to classify our specimen in this genus as its largest species found so far.
Acritarch species
NOW Chlamydophorella?. Originally Micrhystridium, subsequently (and now) Chlamydophorella?.
Holotype: Góczán, 1962, pl.2, figs.12–14.
Age: early Aptian.
------------------------------------------------------------------------------------------------------------------------------------------------
Original description: [Góczán, 1962, p. 192] (Translation from Hungarian with Google Translate):
Micrhystridium sümegense nov. sp.
(Plate II, Fig. 1 2 -1 4 .)
Derivatio nominis: from the Sümeg site.
Holotype: Plate II, Fig. 12 — 14. Catalogue number: Sp. 1/6.
Locus typicus: Sümeg 1. borehole
Stratum typicum: Upper Aptian
Diagnosis: the shell may have been originally spherical, but appears oval due to the cleavage clearly visible in the figure. The edge of the shell and the entire surface are densely covered with processes 2—3 microns apart, stubby at their base, 3 microns long and 1 - 1½ microns thick, with forked flagella at the ends. The flagella touch and surround the one-micron-thick shell parallel to it, like a veil. Color light brown. Number of specimens examined 1.
Size: 39 microns long and 35 microns wide without spines.
Locality: Sümeg 1st borehole, 248.50—249.40 m from dark gray crinoid limestone.
Note: our specimen shows the greatest similarity to the species M. ambiguum Defl. . However, it differs from it by the size of the body and the relatively shorter and more densely arranged processes. Deflandre explained in the description of the genus that the forms belonging to this genus are under 20 microns. However, in the description of M. ambiguum he mentions that the central diameter of this species can reach 27—28 microns. Otherwise, the arrangement of the morphological characters of this species is completely identical to that of our species.
After the above, I believe that even though it differs in size from all known species of the genus, we are right to classify our specimen in this genus as its largest species found so far.