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Acrobotrys spp. (Figure 3M, 3N; 15.171). Several poorly defined
Cannobotryidae of variable construction (e.g., Acrobotrys
sp. A, B, C in Petrushevskaya 1965; Acrobotrys cf.
disolenia in Benson 1966; Acrobotrys sp. A
and B, Cannobotryid sp. A in Boltovskoy and
Riedel 1987; etc.).
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Botryocephalina armata
Petrushevskaya (Figure 15.173). Main part of cephalis represented
by two laterally fused hemispherical chambers of almost
equal size (cephalic and antecephalic); with a long
apical spine. Thorax cylindrical, its distal section can
be poreless. Shell height: ca. 50 µm. Ref: Petrushevskaya (1965).
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Botryocyrtis scutum (Harting) (Figure 15.172) [=?Botryocyrtis caput-serpentis,
?Botryocyrtis quinaria]. Large, multilobed
cephalis. Thorax very short, cylindrical. Abdomen longer.
Sometimes one post-abdominal segment. Entire shell, and
especially its upper section, enclosed in a thick, spongy
mantle. Shell height: 80-130 µm. Ref: Nigrini and Moore
(1979).
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Botryopyle dictyocephalus Haeckel (Figure 15.174). Cephalis chiefly composed of a
large, ovoid, thin-walled antecephalic chamber, and a
much smaller, spherical, thick-walled eucephalic chamber.
Cervical constriction absent. Thorax cylindrical, with
ragged temination or distally narrowing into a short,
poreless tube. Shell height: ca. 100 µm. Ref: Petrushevskaya (1965).
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Centrobotrys thermophila
Petrushevskaya (Figure 15.175). Shell is a laterally compressed,
very thin walled, pored cone, within which the spherical,
thick-walled eucephalic chamber is enclosed. Shell
height: ca. 100 µm. Ref: Petrushevskaya (1965).
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Saccospyris antarctica Haecker (Figure 15.176). Cephalis tri-lobulated, with the
cephalic and antecephalic chambers much larger than the
postcephalic one, and approximately equal in size. Thorax
cylindrical, with a closed mouth in fully-grown
specimens. Shell thick-walled, surface rough. Shell
height: 110-160 µm. Ref. : Petrushevskaya (1965).
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