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Deflandrea galeata
Deflandrea galeata (Lejeune-Carpentier, 1942) Lentin and Williams, 1973; emend. Lejeune-Carpentier and Sarjeant, 1981
Originally Peridinium, subsequently (and now) Deflandrea.
Holotype: Lejeune-Carpentier, 1942, pl.B186-188, fig.15-20
Locus typicus:
Stratum typicum: Senonian
Emended description: Lejeune-Carpentier and Sarjeant, 1981, p.18
Circumcavate cysts of relatively large size. Apical horn large, symmetrically tapering from a very broad base to a slightly blunt tip: the horn base is about three-quarters as wide as the horn length, which in turn is between one-third and one-half the length of the endoblast. The two antapical horns are only slightly smaller and almost equally broad-based, with lateral margins straight to slightly convex and inner margins concave. Epitract of periblast in the form of a truncated cone from which the apical horn arises: hypotract trapezoidal, its profile altered by the two horns. Endoblast spheroidal to broadly ovoidal. Cingulum well marked on the periblast by strong ridges but only slightly hollowed; sulcal region quite deeply indented. Paraplate boundaries elsewhere indicated only by folds or low ridges on the periphragm; paratabulation ?4", ?3a, 7", ?c, 5""", Op, 2"""". Surface of periphragm very irregularly papillate to echinate, the papillae and short spines corresponding in position to nodes on a fine polygonal network (not otherwise expressed).
Archaeopyle single-plate intercalary (type I/l), of broad-hexa type formed by the loss of paraplate 2a.
Originally Peridinium, subsequently (and now) Deflandrea.
Holotype: Lejeune-Carpentier, 1942, pl.B186-188, fig.15-20
Locus typicus:
Stratum typicum: Senonian
Emended description: Lejeune-Carpentier and Sarjeant, 1981, p.18
Circumcavate cysts of relatively large size. Apical horn large, symmetrically tapering from a very broad base to a slightly blunt tip: the horn base is about three-quarters as wide as the horn length, which in turn is between one-third and one-half the length of the endoblast. The two antapical horns are only slightly smaller and almost equally broad-based, with lateral margins straight to slightly convex and inner margins concave. Epitract of periblast in the form of a truncated cone from which the apical horn arises: hypotract trapezoidal, its profile altered by the two horns. Endoblast spheroidal to broadly ovoidal. Cingulum well marked on the periblast by strong ridges but only slightly hollowed; sulcal region quite deeply indented. Paraplate boundaries elsewhere indicated only by folds or low ridges on the periphragm; paratabulation ?4", ?3a, 7", ?c, 5""", Op, 2"""". Surface of periphragm very irregularly papillate to echinate, the papillae and short spines corresponding in position to nodes on a fine polygonal network (not otherwise expressed).
Archaeopyle single-plate intercalary (type I/l), of broad-hexa type formed by the loss of paraplate 2a.