Back
Senegalinium laevigatum
Senegalinium laevigatum (Malloy, 1972) Bujak and Davies, 1983
Originally Deflandrea, subsequently Andalusiella, thirdly Lejeunecysta, fourthly (and now) Senegalinium; see also Lejeunia (combination illegitimate).
Tax. sr. synonym of Senegalinium psilatum Jain and Millepied, 1973, according to Herngreen, 1975.
Holotype: Malloy, 1972, pl.1, fig.5
Locus typicus: Gabon GLA lX well, Gabon Republic, West Africa
Stratum typicum: Senonian (pre-Maastrichtian)
--------------------------------------------------
G.L. Williams short notes on species, Mesozoic-Cenozoic dinocyst course, Urbino, Italy, May 17-22, 1999 - LPP VIEWER CD-ROM 99.5.
Senegalinium laevigatum (Malloy, 1972) Bujak and Davies, 1983. Senegalinium laevigatum has a subpentagonal to globose pericyst, with thin periphragm and a thick-walled endocyst. The endocyst is usually adpressed against the pericyst except in the vicinity of the apical horn. The apical and two antapical horns are normally extremely small or may be nearly absent. Thickening of endocyst at base of horns is common. Periphragm smooth. The archeopyle is relatively large. No clear indication of cingulum or tabulation. Length 62-82 µm, breadth 52-74 µm.
--------------------------------------------------
Original diagnosis: Malloy, 1972, p.64: Deflandrea laevigata
Outer cyst globose to sub-pentagonal in outline with a thin periphragm and a thick-walled inner cyst. The latter nearly fills the outer cyst and can be almost indistinguishable from it, except at the apices. Both apical and antapical horns are normally extremely low cones, and in globose specimens may be minute to nearly absent.
Thickenings in the inner cyst wall are usually present at the bases of the horns. The surface of the periphragm is smooth, as is that of the endophragm, and both commonly display folding.
The archeopyle is hexagonal, intercalary, and relatively large. No clear indications of either a girdle or tabulation are present, although transverse median folds are nearly always present in both the periphragm and endophragm.
Dimensions: Length, normal to equatorial plane, overall 82 µm to 62 µm, equatorial width 74 um to 52 µm.
Originally Deflandrea, subsequently Andalusiella, thirdly Lejeunecysta, fourthly (and now) Senegalinium; see also Lejeunia (combination illegitimate).
Tax. sr. synonym of Senegalinium psilatum Jain and Millepied, 1973, according to Herngreen, 1975.
Holotype: Malloy, 1972, pl.1, fig.5
Locus typicus: Gabon GLA lX well, Gabon Republic, West Africa
Stratum typicum: Senonian (pre-Maastrichtian)
--------------------------------------------------
G.L. Williams short notes on species, Mesozoic-Cenozoic dinocyst course, Urbino, Italy, May 17-22, 1999 - LPP VIEWER CD-ROM 99.5.
Senegalinium laevigatum (Malloy, 1972) Bujak and Davies, 1983. Senegalinium laevigatum has a subpentagonal to globose pericyst, with thin periphragm and a thick-walled endocyst. The endocyst is usually adpressed against the pericyst except in the vicinity of the apical horn. The apical and two antapical horns are normally extremely small or may be nearly absent. Thickening of endocyst at base of horns is common. Periphragm smooth. The archeopyle is relatively large. No clear indication of cingulum or tabulation. Length 62-82 µm, breadth 52-74 µm.
--------------------------------------------------
Original diagnosis: Malloy, 1972, p.64: Deflandrea laevigata
Outer cyst globose to sub-pentagonal in outline with a thin periphragm and a thick-walled inner cyst. The latter nearly fills the outer cyst and can be almost indistinguishable from it, except at the apices. Both apical and antapical horns are normally extremely low cones, and in globose specimens may be minute to nearly absent.
Thickenings in the inner cyst wall are usually present at the bases of the horns. The surface of the periphragm is smooth, as is that of the endophragm, and both commonly display folding.
The archeopyle is hexagonal, intercalary, and relatively large. No clear indications of either a girdle or tabulation are present, although transverse median folds are nearly always present in both the periphragm and endophragm.
Dimensions: Length, normal to equatorial plane, overall 82 µm to 62 µm, equatorial width 74 um to 52 µm.