16. Radiolaria - Deep Sea Drilling Project

M. G. PETRUSHEVSKAYA, G. E. KOZLOVA
Genus LIPMANELLA Loeblich and Tappan,
emend. Petruskevskaya
Lipmanella Loeblich and Tappan, 1961, p. 119. = Dictyoceras
Haeckel, 1860, p. 333; 1887, p. 1324; Campbell, 1954, p. 130;
Petrushevskaya, 1971b, pp. 198, 220. Type species Lithornithium
dictyoceras Haeckel (Haeckel, 1862, pi. 8, figs. 1-5).
The cephalis thick-walled, divided (as a rule) into upper and
lower parts by means of the arches ap, as in Squinabollum and in
Dicolocapsa. The thorax is larger than the cephalis. The abdomen
may be separated distinctly from the thorax or it may be united
with the thorax in a single segment. The spines D, LI and Lr form
external feet, which are rather weak. They go laterally from the
thorax. In the upper walls of the thorax are three ribs formed by
these spines. The spine A forms the apical horn. The mouth of the
shell is very often open.
Cretaceous?-Quaternary.
Remark: The taxonomical position of the genus is doubtful-maybe
it is really pterocoryid.
Lipmanella (?) sp. aff. Lithomelissa? amazon Foreman
(Plate 37, Figure 1)
^.Lithomelissa amazon Foreman, 1968, p. 26, pi. 4, fig. 1.
The division of the cephalis into lower and upper parts is not
developed. In typical Lithomelissa amazon, the cephalis is smoother.
Paleogene.
Lipmanella (?) sp. M
(Plate 37, Figure 2)
The thorax, the spines and the pores are very much the same as
in Lipmanella (?) sp. aff. Lithomelissa amazon. The difference is in
the smaller dimensions and in the cephalis being constricted at its
base, with pronounced subdivision into upper and lower parts.
Miocene.
Lipmanella sp. O
(Plate 37, Figures 4,5)
Differs from Lipmanella (?) sp. M by the distinct subdivision of
the skeleton into thorax and abdomen.
This species is somewhat similar to Dictyoceras insectum
Haeckel (1887, pi. 71, fig. 6), and there is no doubt in the generic
identification of this species (Dictyoceras = Lipmanella). It is also
somewhat similar to Pterocorys columbo Haeckel (1887, pi. 71, fig.
2), but differs in the construction of the cephalis. Some specimens
are similar to Pterocyrtidius barbadense (Ehrenberg) (see Plate 27,
Figure 18, 19) in the proportions of the test.
Miocene.
Lipmanella (?) dogieli (Petrushevskaya)
(Plate 37, Figure 10)
Sethoconus (?) dogieli Petrushevskaya, 1967, p. 95, pi. 53, figs. 1,2;
1971b, pi. 110, fig. 2.
The number of pores is less than in Lipmanella sp. C-only about
7 pores on a half equator. Pores are irregular and of different sizes.
There is no subdivision into thorax and abdomen.
Pliocene-Quaternary.
Remark: This species is very similar also to the Miocene species
described as Lithomelissa campanulaeformis by Campbell and
Clark (1945, p. 44, pi. 6, fig. 1), see Plate 37, Figure 11 in the
present report. Lipmanella (?) dogieli differs from L. campanulaeformis
by smaller dimensions. Perhaps it represents by itself only
Quaternary subgenus of the Miocene species L. campanulaeformis.
Subfamily Group E
To include genera without a wide velum (characteristic for
Neosciadiocapsidae). In place of the velum there is a long, nearly
cylindrical abdomen. Abdominal pores are much larger than
thoracic pores, and therefore the thorax and abdomen seem to be
built of different kinds of skeletal meshwork. Cephalis of the same
kind as in Neosciadiocapsidae, with the arches ap going in the upper
walls. Cephalis conical, wide at the base. The apex gradually turns
into a conical apical horn. Lampterium is the most typical genus of
the group. Whether this group should be placed among Pterocoryidae
or among Neosciadiocapsidae is questionable.
542
Genus THYRSOCYRTIS Ehrenberg
Thyrsocyrtis Ehrenberg, 1847b, p. 54; Haeckel, 1887, p. 1350;
Campbell, 1954, p. 130; Riedel and Sanfilippo, 1970, p. 525.
Type species Thyrsocyrtis rhizodon Ehrenberg, 1873 (1875, pi.
12, fig. 1).
Podocyrtarium Haeckel, 1887, p. 1337; Campbell, 1954, p. 130.
Type species Podocyrtis tripodiscus Haeckel, (1887, pi. 72,
fig. 4).
Podocyrtonium Haeckel, 1887, p. 1347, Campbell, 1954, p. 130.
Podocyrtis pedicellaria Haeckel (1887, pi. 72, fig. 8).
Differs from Lampterium by distinct longitudinal rows of pores
not only on the thorax, but also on the abdomen. Differs from
Podocyrtis 1) by the abdomen being larger than the thorax, and
2) by the difference in the size between thoracic and abdominal
pores.
Tertiary.
Thyrsocyrtis rhizodon Ehrenberg
Thyrsocyrtis rhizodon Ehrenberg, 1873, p. 262; 1875, pi. 12, fig. 1;
Riedel and Sanfilippo, in press, pi. 3C, fig. 6.
Eocene.
Thyrsocyrtis tetracantha (Ehrenberg)
Podocyrtis tetracantha Ehrenberg, 1873, p. 254; 1875, pi. 13, fig. 2.
Thyrsocyrtis tetracantha (Ehrenberg) Riedel and Sanfilippo, 1970,
p.527.
Eocene.
Thyrsocyrtis triacantha (Ehrenberg)
(Plate 32, Figure 9; Plate 34, Figure 6)
Podocyrtis triacantha Ehrenberg, 1873, p. 254; 1875, pi. 13, fig. 4.
Thyrsocyrtis triacantha (Ehrenberg) Riedel and Sanfilippo, 1970, p.
526, pi. 8, figs. 2, 3; Moore, pi. 4, fig. 2.
Eo cene-Oligocene ?
Thyrsocyrtis argulus (Ehrenberg)
(Plate 32, Figure 8)
Podocyrtis argulus Ehrenberg, 1873, p. 248; 1875, pi. 16, fig. 2.
Thyrsocyrtis hirsuta hirsuta (Krasheninnikov) Riedel and Sanfilippo,
1970, p. 7, figs. 8,9.
Eocene.
Thyrsocyrtis sp. E
(Plate 32, Figure 11)
IPodocyrtis pedicellaria Haeckel, 1887, p. 1347, pi. 72, fig. 8.
Wodocyrtis sinuosa (?) in Riedel and Sanfilippo, 1970, p. 534, pi.
11, figs. 3,4.
Eocene.
Podocyrtis (?) or Thyrsocyrtis (?) mitra (Ehrenberg)
Podocyrtis mitra Ehrenberg, 1854, pi. 36, fig. B 20; 1873, p. 251;
non Ehrenberg, 1875, pi. 15, fig. 4.
Podocyrtis (Lampterium) mitra (Ehrenberg) Riedel and Sanfilippo,
1970, p. 534, pi. 11, figs. 5, 6; Moore, in press, pi. 3, fig. 4.
Eocene.
Thyrsocyrtis ? bromia Ehrenberg
Thyrsocyrtis bromia Ehrenberg, 1873, p. 260; 1875, pi. 12, fig. 2;
Riedel and Sanfilippo, 1970, p. 526; Riedel and Sanfilippo, in
press, pi. 8, fig. 6, Moore, in press, pi. 5, figs. 1-3.
Cephalis and thorax very similar to Cyclamp terium species, but
abdomen is smaller.
Eocene.
Genus LOPHOCYRTIS Haeckel
Lophocyrtis Haeckel, 1887, p. 1410; Campbell, 1954, p. 134;
Riedel and Sanfilippo, 1970, p. 529. Type species Eucyrtidium
stephanophorum Ehrenberg (1873, p. 223; 1875, pi. 8,fig. 14).
Differs from Thyrsocyrtis mainly by the abdomen being
narrower.
Lophocyrtis? jacchia (Ehrenberg) group
(Plate 28, Figure 21)
Thyrsocyrtis jacchia Ehrenberg, 1873, p. 261; 1875, pi. 12, fig. 7.
Thyrsocyrtis dionisia Ehrenberg, 1873, p. 260; 1875, pi. 12, fig. 5.