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Senoniasphaera protrusa
Senoniasphaera protrusa Clarke and Verdier, 1967; Emendation: Prince et al., 1999, p.161.
Holotype: Clarke and Verdier, 1967, pl.14, fig.8
Locus typicus: Culver Cliff, Isle of Wight, England
Statum typicum: Senonian
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G.L. Williams short notes on species, Mesozoic-Cenozoic dinocyst course, Urbino, Italy, May 17-22, 1999 - LPP VIEWER CD-ROM 99.5.
Senoniasphaera protrusa Clarke and Verdier, 1967. Clarke and Verdier (1967, p.61-62) noted that this species has an inner body which protrudes into the apical and antapical horns. The two antapical horns are generally unequal. The outer membrane is attached to the inner body mostly on the dorsal and ventral sides by a series of perforated pillars which may be so short as to be hardly visible. Size: overall length 80-110 µm, width 55-82 µm, length of endocyst 50-69 µm, width 44-66 µm, length of apical horn 15-20 µm, length of antapical horn aa8-18 µm, width cingulum 6-7 µm.
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Original diagnosis: Clarke and Verdier, 1967, p.61
A species of Senoniasphaera in which the inner body protrudes into the apical and antapical horns.
Original description Clarke and Verdier, 1967, p.62:
Inner body round or oval, protruding into the apical and antapical horns. Outer membrane is extended to form a distinct, long apical horn and two generally unequal, antapical horns; these latter are, however, symmetrically disposed on either side of the long axis. The outer membrane is attached to the inner body mostly on the dorsal and ventral sides by a series of perforated pillars which may be so short as to be hardly visible. The transverse girdle is distinct and its edge can be seen at the margin of the outer membrane. In this species, however, the outer membrane is seldom developed into lateral horns. A longitudinal furrow is present although not clearly differentiated while the transverse girdle, although interrupted, appears to show only slight displacement. Tabulation is present but to resolve accurately the number and location of plates is difficult. In the majority of specimens the apical part has been lost leaving an indented archaeopyle with a sulcal notch. Sculpture of the inner body and outer wall is either psilate or scabrate.
Measurements: Overall length 80-110 µm, overall breadth 55-82 µm, length of inner body 50-69 µm, breadth of inner body 44-66 µm, length of apical horn 15-20 µm, length of antapical horns 8-18 µm, width of transverse furrow 6-7 µm.
Remarks: Clarke and Verdier, 1967, p.61:
The specimen named by Deflandre, 1935 Podolampas spec. is probably conspecific with S. protrusa.
Holotype: Clarke and Verdier, 1967, pl.14, fig.8
Locus typicus: Culver Cliff, Isle of Wight, England
Statum typicum: Senonian
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G.L. Williams short notes on species, Mesozoic-Cenozoic dinocyst course, Urbino, Italy, May 17-22, 1999 - LPP VIEWER CD-ROM 99.5.
Senoniasphaera protrusa Clarke and Verdier, 1967. Clarke and Verdier (1967, p.61-62) noted that this species has an inner body which protrudes into the apical and antapical horns. The two antapical horns are generally unequal. The outer membrane is attached to the inner body mostly on the dorsal and ventral sides by a series of perforated pillars which may be so short as to be hardly visible. Size: overall length 80-110 µm, width 55-82 µm, length of endocyst 50-69 µm, width 44-66 µm, length of apical horn 15-20 µm, length of antapical horn aa8-18 µm, width cingulum 6-7 µm.
--------------------------------------------------
Original diagnosis: Clarke and Verdier, 1967, p.61
A species of Senoniasphaera in which the inner body protrudes into the apical and antapical horns.
Original description Clarke and Verdier, 1967, p.62:
Inner body round or oval, protruding into the apical and antapical horns. Outer membrane is extended to form a distinct, long apical horn and two generally unequal, antapical horns; these latter are, however, symmetrically disposed on either side of the long axis. The outer membrane is attached to the inner body mostly on the dorsal and ventral sides by a series of perforated pillars which may be so short as to be hardly visible. The transverse girdle is distinct and its edge can be seen at the margin of the outer membrane. In this species, however, the outer membrane is seldom developed into lateral horns. A longitudinal furrow is present although not clearly differentiated while the transverse girdle, although interrupted, appears to show only slight displacement. Tabulation is present but to resolve accurately the number and location of plates is difficult. In the majority of specimens the apical part has been lost leaving an indented archaeopyle with a sulcal notch. Sculpture of the inner body and outer wall is either psilate or scabrate.
Measurements: Overall length 80-110 µm, overall breadth 55-82 µm, length of inner body 50-69 µm, breadth of inner body 44-66 µm, length of apical horn 15-20 µm, length of antapical horns 8-18 µm, width of transverse furrow 6-7 µm.
Remarks: Clarke and Verdier, 1967, p.61:
The specimen named by Deflandre, 1935 Podolampas spec. is probably conspecific with S. protrusa.