16. Radiolaria - Deep Sea Drilling Project

M. G. PETRUSHEVSKAYA, G. E. KOZLOVA
Theocampe mongolfieri (Ehrenberg) group
(Plate 23, Figures 3-5)
Eucyrtidium mongolfieri Ehrenberg, 1854, pi. 36, fig. 18B; 1873, p.
230; 1875, pi. 10, fig. 3.
Theocampe mongolfieri (Ehrenberg), Burma 1959, p. 239; Riedel
and Sanfilippo, p. 536; Riedel and Sanfilippo, in press, pi. 3E,
fig. 13.
ISethamphora costata Haeckel, 1887, p. 1251, pi. 62, fig. 3.
IDictyocephalus pulcherrimus typ. Clark and Campbell, 1942, p.
78, pi. 8, fig. 2.
Eocene.
Theocampe excellens (Ehrenberg)
(Plate 23, Figure 7)
Eucyrtidium exellens Ehrenberg, 1873, p. 228; 1875, pi. 10, fig. 12.
Differs from T. mongolfieri by its smaller pores on the abdomen.
These pores are not disposed in distinct longitudinal rows.
Oligocene.
Subgenus TRICOLOCAMPE Haeckel
Tricolocampe Haeckel, 1881, p. 434; 1887, p. 1411 ;ROH Campbell,
1954, p. 134; Petrushevskaya, 1971b, p. 198. = Tricolocampium
Haeckel, p. 1412. Type species Tricolocampe cylindrica Haeckel
(1887, pi. 66, fig. 21).
The shelf between thorax and abdomen may be more or less
pronounced. Abdomen is slender, ovate. It is somewhat broader
than the thorax in its upper part. In fully developed specimens the
mouth is constricted and even elongated into a short tube, but very
often the skeleton is incomplete. Abdomen is flattened laterally.
The pores on the abdomen are disposed in horizontal (transverse)
rows-as in typical artostrobiids.
Cretaceous-Recent.
The species T. vanderhoofi Campbell and Clark, Theocampe lispa
Foreman, T. altamonensis (Campbell and Clark) and T. dactylica
Foreman (described by H. Foreman (1968) seem to belong in this
group.
This group is more closely related to Theocampe subgenus I than
to typical Theocampe.
Theocampe sp. aff. T. gemmata (Ehrenberg)
(Plate 23 Figure 10)
lEucyrtidium gemmatum Ehrenberg, 1873, p. 229; 1875, pi. 10,
fig. 6.
This species differs from T. gemmata by the outline of the test.
It is somewhat similar to the species described as Theocorys ovata
Haeckel, 1887, pi. 69, fig. 16, but differs from it by the smaller
number of the pores in a horizontal row and by the deeper
constriction between thorax and abdomen.
Eocene.
Theocampe callimorphos (Clark and Campbell)
(Plate 23, Figure 8)
Dictyocephalis callimorphos Clark and Campbell, 1945, p. 42, pi. 6,
fig. 7.
Lithomitra sp. aff. Lithomitra lineata (Ehr.) Riedel and Sanfilippo,
in press, pi. 3E, figs. 17, 18, part.
This form has longitudinal furrows between the pores of a
horizontal row.
Eocene.
Theocampe eos (Clark and Campbell)
(Plate 23, Figure 9)
Dictyocephalus eos Clark and Campbell, 1945, p. 42, pi. 6, fig. 8.
Very much the same as T. callimorphos, but without longitudinal
furrows.
Eocene.
Subfamüy ARTOSTROBIINAE Riedel
Artostrobiidae Riedel, 1967a, p. 149; 1967b, p. 296; Petrushevskaya,
1971a, p. 985;1971b,p.235.
Four- or multi-segmented Artostrobiidae. Pores are disposed on
the abdomen in distinct transverse (horizontal) rows.
538
Genus THEOCAMPTRA Haeckel, emend, Petrushevskaya
Theocamptra Haeckel, 1887, p. 1424; Campbell, 1954, p. 134. Type
species Theocampe collaris Haeckel, 1887, pi. 66, fig. 18.
After the cephalis, which is united with thorax, the third
segment (distinctly separated from the other part of the skeleton) is
distinguished. The third segment is rather short, nearly of the same
length as the thorax. The lower part of the test is very much like the
abdomen of Theocampe species, and the third segment seems to be
inserted between thorax and abdomen. This is the only difference
between Theocamptra and Theocampe {Tricolocampe).
Paleogene-Neogene.
Theocamptra marylandica (Martin)
(Plate 23, Figures 20, 21)
Lithocampe marylandica Martin, 1904, p. 450, pi. 130, fig. 4.
Three transverse rows of pores on the third segment. The fourth
segment up to 90-100µ broad.
Miocene.
Theocamptra sp. aff. T. marylandica
(Plate 23, Figures 22, 23)
ILithocampe marylandica Martin, 1904, p. 450.
Artostrobium sp. aff. A. doliolum Riedel and Sanfilippo, in press,
pi. 21, fig. 4.
Differs from the typical T. marylandica by its smaller
dimensions; the fourth segment up to 60-70µ broad.
Miocene.
Remark: Both species are very similar to Theocampe callimorphos
(Clark and Campbell) (PL 23, fig. 8). The difference lies in the
segmentation of the test.
Theocamptra ovata (Haeckel)
(Plate 23, Figures 17-19)
Lithocampe ovata Haeckel, 1887, p. 1504, p. 77, fig. 1.
Two transverse rows of pores on the third segment. No furrows
near the pores on the fourth segment.
Miocene.
Theocamptra sp. aff. Theocamptra ovata (Haeckel)
(Plate 23, Figures 15, 16; Plate 24, Figure 6)
Very much the same as typical T. ovata, but has longitudinal
furrows between the pores. This feature makes this species similar to
Theocamptra aff. marylandica and to Theocampe callimorphus.
Oligocene.
Theocamptra collaris (Haeckel)
Theocampe collaris Haeckel, 1887, p. 1425, pi. 66, fig. 18.
Artostrobium sp. aff. A. doliolum Riedel and Sanfilippo, in press,
pi. 21, figs. 1, 3, 5, part.
One transverse row of pores on the third segment. The fourth
segment is 1.5 times broader than the third (the same as in T.
marylandica group and in T. ovata group).
Miocene.
Theocamptra corona (Haeckel) group
(Plate 23, Figures 24, 25)
Cyrtophormis corona Haeckel, 1887, p. 1462, pi. 77, fig. 15.
Phormostichoartus corona (Haeckel) Riedel and Sanfilippo, in press,
pi. 2J, figs. 1-5.
Four transverse rows of pores on the third segment. It is
distinguished from T. collaris, T. marylandica and T. ovata also by
the comparative breadth of the fourth segment. In T. corona the
fourth segment is 2 to 2.5 times broader than the third segment.
Miocene.
Theocamptra spirocyrtis Petrushevskaya sp. nov.
(Plate 23, Figures 28-30)
The description is based on 21 specimens from 139-5-CC;
140-2-1, 5-7 cm and 80-82 cm; 140-2-3, 80-84 cm and 140-2-4, 5-7
cm and 80-82 cm.
Seven to nine transverse rows of pores on the third segment,
which is about 60µ long. It is broader in its lower part (about
60-80µ) than in its upper part. The fourth segment 2 to 2.5 times as
broad as the third. Very often the large and thin-walled fourth
segment is damaged.
Miocene.