Back
Senoniasphaera inornata
Senoniasphaera inornata (Drugg, 1970) Stover and Evitt, 1978
Originally Chiropteridium, subsequently (and now) Senoniasphaera.
Holotype: Drugg, 1970, fig.3c
Locus typicus: Clayton Formation, Alabama, USA
Stratum typicum: Danian
--------------------------------------------------
G.L. Williams short notes on species, Mesozoic-Cenozoic dinocyst course, Urbino, Italy, May 17-22, 1999 - LPP VIEWER CD-ROM 99.5.
Senoniasphaera inornata (Drugg, 1970b) Stover and Evitt, 1978. S. inornata is a double-walled cavate cyst, with endophragm 2-3 µm thick, and with weakly expressed antapical lobes. The endophragm may be punctate. The periphragm is thin, smooth and closely appressed to the endocyst dorso-ventrally but developing a pericoel laterally and antapically. Sparse and faint supporting processes are sometimes present in a lateral position. Overall length: 97-107 µm, breadth 87-113 µm. Endocyst: 58-84 µm
--------------------------------------------------
Original description: Drugg, 1970, p. 811-812: Chiropteridium inornatum
Double-walled cavate cyst. Endophragm 2 to 3 µm thick forming a spherical to somewhat flattened capsule which may have weakly expressed antapical lobes. The surface of this capsule often exhibits scattered punctae. The periphragm is thin, smooth and closely appressed to the capsule dorsoventrally but developing a pericoel laterally and antapically. Sparse and faint supporting processes are sometimes present in a lateral position. The periphragm at the antapex is usually weakly lobed but is sometimes rounded. The periphragm forms a low angled point at the apex. The archeopyle is apical and the operculum is six-sided in outline (see Fig. 3 F). The capsule diameter ranges from 58 to 84µm. The total length (without operculum) ranges from 97 to 101 µm, and the width from 87 to 113 µm.
Affinities:
Drugg, 1970, p. 812: Chiropteridium inornatum
This new species differs from Chiropteridium aspinatum (Gerlach) Brosius, 1963, in that the outer membrane is more clearly and widely separated from the capsule.
Originally Chiropteridium, subsequently (and now) Senoniasphaera.
Holotype: Drugg, 1970, fig.3c
Locus typicus: Clayton Formation, Alabama, USA
Stratum typicum: Danian
--------------------------------------------------
G.L. Williams short notes on species, Mesozoic-Cenozoic dinocyst course, Urbino, Italy, May 17-22, 1999 - LPP VIEWER CD-ROM 99.5.
Senoniasphaera inornata (Drugg, 1970b) Stover and Evitt, 1978. S. inornata is a double-walled cavate cyst, with endophragm 2-3 µm thick, and with weakly expressed antapical lobes. The endophragm may be punctate. The periphragm is thin, smooth and closely appressed to the endocyst dorso-ventrally but developing a pericoel laterally and antapically. Sparse and faint supporting processes are sometimes present in a lateral position. Overall length: 97-107 µm, breadth 87-113 µm. Endocyst: 58-84 µm
--------------------------------------------------
Original description: Drugg, 1970, p. 811-812: Chiropteridium inornatum
Double-walled cavate cyst. Endophragm 2 to 3 µm thick forming a spherical to somewhat flattened capsule which may have weakly expressed antapical lobes. The surface of this capsule often exhibits scattered punctae. The periphragm is thin, smooth and closely appressed to the capsule dorsoventrally but developing a pericoel laterally and antapically. Sparse and faint supporting processes are sometimes present in a lateral position. The periphragm at the antapex is usually weakly lobed but is sometimes rounded. The periphragm forms a low angled point at the apex. The archeopyle is apical and the operculum is six-sided in outline (see Fig. 3 F). The capsule diameter ranges from 58 to 84µm. The total length (without operculum) ranges from 97 to 101 µm, and the width from 87 to 113 µm.
Affinities:
Drugg, 1970, p. 812: Chiropteridium inornatum
This new species differs from Chiropteridium aspinatum (Gerlach) Brosius, 1963, in that the outer membrane is more clearly and widely separated from the capsule.