Back
Hystrichostrogylon clausenii
Hystrichostrogylon clausenii Bujak, 1994
Holotype: Bujak, 1994, pl.3, fig.1-2
Paratypes: Bujak, 1994
Locus typicus: North Sea, UK21 /28b-7 well
Stratum typium: section at 3900ft, Lutetian, Middle Eocene
--------------------------------------------------
G.L. Williams short notes on species, Mesozoic-Cenozoic dinocyst course, Urbino, Italy, May 17-22, 1999 - LPP VIEWER CD-ROM 99.5.
Hystrichostrogylon clausenii Bujak, 1994. Bujak (1994, p.125-127) noted that this species has a periphragm forming a high membrane surrounding the ambital periphery of the cyst, except in the mid-dorsal and mid-ventral region where the endophragm and periphragm are in contact. Trifurcate and occasional bifurcate processes extend a short distance above the periphragm, except on the right lateral side of the cyst where the height of the periphragm is reduced and the length of the processes extending beyond the membrane is increased. A claustrum is typically developed on the left cingular-postcingular side of the periphragm. Plates 2" and 4" may be involved in archeopyle formation. Size: pericyst length 63-73 µm, width 63-75 µm, endocyst length 32-41 µm, width 31-40 µm.
--------------------------------------------------
Original diagnosis: Bujak, 1994, p.???
Endocyst smooth with a circular outline. Periphragm smooth to chagrinate, compressed dorso-ventrally, forming a high membrane surrounding the ambital periphery of the cyst, except in the mid-dorsal and mid-ventral regions where the periphragm and endophram are in contact. Trifurcate and occasional bifurcate processes extend a short distance above the periphragm, except on the right lateral side of the cyst where the height of the periphragm is reduced and the length of the processes extending beyond the membrane is increased. A claustrum is typically developed on the left cingularpostcingular side of the periphragm. Archeopyle precingular, formed by the loss of paraplate 3".
Dimensions. Pericyst length 63-73 µm, breadth 63-75 µm, endocyst length 32-41 µm, breadth 31-40 µm.
Affinities:
Bujak, 1994, p.???: H. clausenii is considered to be conspecific with Hystrichostrogylon sp. 1, which Heilmann-Clausen and Costa (1989) described from the Wursterheide research well, northwest Germany, within the Glinde Formation, asigned to NP14 in their Table 1.
Holotype: Bujak, 1994, pl.3, fig.1-2
Paratypes: Bujak, 1994
Locus typicus: North Sea, UK21 /28b-7 well
Stratum typium: section at 3900ft, Lutetian, Middle Eocene
--------------------------------------------------
G.L. Williams short notes on species, Mesozoic-Cenozoic dinocyst course, Urbino, Italy, May 17-22, 1999 - LPP VIEWER CD-ROM 99.5.
Hystrichostrogylon clausenii Bujak, 1994. Bujak (1994, p.125-127) noted that this species has a periphragm forming a high membrane surrounding the ambital periphery of the cyst, except in the mid-dorsal and mid-ventral region where the endophragm and periphragm are in contact. Trifurcate and occasional bifurcate processes extend a short distance above the periphragm, except on the right lateral side of the cyst where the height of the periphragm is reduced and the length of the processes extending beyond the membrane is increased. A claustrum is typically developed on the left cingular-postcingular side of the periphragm. Plates 2" and 4" may be involved in archeopyle formation. Size: pericyst length 63-73 µm, width 63-75 µm, endocyst length 32-41 µm, width 31-40 µm.
--------------------------------------------------
Original diagnosis: Bujak, 1994, p.???
Endocyst smooth with a circular outline. Periphragm smooth to chagrinate, compressed dorso-ventrally, forming a high membrane surrounding the ambital periphery of the cyst, except in the mid-dorsal and mid-ventral regions where the periphragm and endophram are in contact. Trifurcate and occasional bifurcate processes extend a short distance above the periphragm, except on the right lateral side of the cyst where the height of the periphragm is reduced and the length of the processes extending beyond the membrane is increased. A claustrum is typically developed on the left cingularpostcingular side of the periphragm. Archeopyle precingular, formed by the loss of paraplate 3".
Dimensions. Pericyst length 63-73 µm, breadth 63-75 µm, endocyst length 32-41 µm, breadth 31-40 µm.
Affinities:
Bujak, 1994, p.???: H. clausenii is considered to be conspecific with Hystrichostrogylon sp. 1, which Heilmann-Clausen and Costa (1989) described from the Wursterheide research well, northwest Germany, within the Glinde Formation, asigned to NP14 in their Table 1.