 |
Anthocyrtidium ophirense (Ehrenberg) (Figure 15.152). Cephalis elongate with a large
three-bladed apical horn. Thorax campanulate, with
circular, regular pores arranged hexagonally; peristome
distinct, constricted, may bear terminal teeth. Abdomen
absent. Maximum breadth of thorax: 90-140 µm. Ref: Nigrini and Moore
(1979). |
 |
Anthocyrtidium zanguebaricum (Ehrenberg) (Figure 15.153). Similar to A. ophirense,
but apical horn is smaller, thorax less campanulate,
narrower, and terminal teeth smaller or absent. Maximum
breadth of thorax: 60-80 µm. Ref: Nigrini and Moore
(1979). |
 |
Lamprocyclas maritalis group? Haeckel (Figure 3P; 15.158). Massive shell; cephalis oval,
with a large apical horn. Thorax cupola-shaped, with
regular, circular, framed pores. Abdomen separated by a
conspicuous lumbar stricture, inflated, with larger,
regularly arranged, framed pores, usually with a
well-defined poreless perstome with teeth. L. m.
maritalis Haeckel differs from L. m. Haeckel polypora
Nigrini in having a less inflated abdomen. Maximum
breadth of abdomen: 100-140 µm. Ref: Nigrini and Moore
(1979). |
 |
Lamprocyrtis hannai Campbell and Clark (Figure 15.154) [=Lamprocyrtis hannai, Lamprocyclas
junonis]. Cephalis elongate, with a large
three-bladed apical horn. Thorax campanulate,
thick-walled, with subregular, circular pores. Abdomen
truncate-conical, with large, subregular, circular pores
and usually with terminal and/or subterminal teeth.
Maximum breadth of abdomen: 90-150 µm. Ref: Nigrini and Moore
(1979). |
 |
Lamprocyrtis nigriniae
(Caulet) (Figure 15.157) [=Conarachnium nigriniae, Lamprocyrtis
haysi]. Cephalis elongated, usually open poximally,
with a large three-bladed horn. Thorax campanulate,
thin-walled, with large, subregular, circular pores
increasing in size distally; peristome absent or weakly
developed. No abdomen. Maximum breadth of thorax: ca. 90
µm. Ref: Nigrini and Moore
(1979). |
 |
Pterocorys hertwigii (Haeckel) (Figure 15.155) [=Theoconus hertwigii, Phormocyrtis
fatuosa]. Cephalis oval, horned. Thorax campanulate.
Abdomen conical, with ragged termination. Thorax and
abdomen thin-walled, with regular circular pores in
longitudinal rows, with several continuous or interrupted
longitudinal poreless ribs. Total shell height (excluding
horn): 120-200 µm. Ref: Caulet and
Nigrini (1988). |
 |
Pterocorys minythorax (Nigrini) (Figure 15.156) [=Theoconus minythorax].
Cephalis subspherical, horned. Thorax small, campanulate.
Abdomen comparatively large, cylindrical, slightly
flared, with ragged termination. Pores on thorax and
abdomen regular, circular. Total shell height (excluding
horn): 120-200 µm. Ref: Caulet and
Nigrini (1988). |
 |
Pterocorys zancleus (Muller) (Figure 15.159) [=Theoconus zancleus, ?Pterocorys
sabae, ?Pterocorys campanula]. Cephalis
subcircular, horned. Thorax a truncated cone, with three
small wings. Abdomen cylindrical or conical, slightly
flared. Total shell height (exluding horn): 100-230 µm.
Ref: Benson (1966), Petrushevskaya
(1971a). |
 |
Pteroscenium pinnatum Haeckel (Figure 15.162) [=Verticillata hexacantha].
Campanulate one-segmented shell with delicate lattice of
small, circular pores. Top of cephalis extends into a
large, proximally perforated, three-bladed horn; base is
prolonged into three stout, perforated, slightly bent
feet. Total shell height (including horn and feet):
220-280 µm. Cephalis does not seem to be agree with the
family-level diagnosis; probably a plagoniid. Ref: Haeckel (1887), Benson (1966). |
 |
Stichopilium bicorne Haeckel (Figure 15.161). Cephalis cap-shaped, with two
stout, three-bladed horns. Thorax pyramidal (proximally)
to cylindrical (distally), with three conspicuous wings.
One or two cylindrical post-thoracic segments. Thorax and
subsequent joints with small, circular, regularly
arranged pores. Although this species has traditionally
been ascribed to the Pterocorythidae, its cephalis does
not seem to be divided into lobes, and is therefore
probably a theoperid. Ref: Haeckel (1887), Benson (1966). |
 |
Theocorythium trachelium (Ehrenberg) (Figure 15.160) [=Calocyclas amicae, Lamprocyclas
trachelius, Lamprocyclas cranoides]. Cephalis
spherical, with a prominent, three-bladed apical horn.
Thorax campanulate, inflated. Abdomen cylindrical, with a
slight medial constriction; peristome diffentiated,
toothed. Pores on post-cephalic segments circular,
regularly arranged. Total shell height (without horn):
150-200 µm. Ref: Petrushevskaya
(1971a). |