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Moorodinium quindalupense
From Fensome et al., 2019:
Moorodinium quindalupense Backhouse, 1988, p.99, pl.33, figs.6–10; pl.34, fig.1. Holotype: Backhouse, 1988, pl.33, fig.9; Fensome et al., 1996, fig.3 — p.2313. Age: early Barremian.
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Locus typicus: Perth Basin, W Australia
Stratum typicum: Early Barremian
Original description: Backhouse, 1988, p.99
Medium-sized ovoid proximochorate cysts bearing a single broad, antapical spine. Epicyst not paratabulate under a light microscope, finely granular, bearing two membranous septa passing dorso-ventrally over apex of cyst. Septa up to 3 µm high, usually lower. Paratabulation on hypocyst indicated by low features in penitabular positions, number of paraplates not determined, but paratabulation appears similar to that of M. spinatum. Parasulcus weakly indicated by low surface features. Paracingulum indicated by low transverse septa, cross septa absent. Antapical spine up to 10 µm long, broadly based, asymmetrical and pointed, positioned in centre of antapical paraplate. Archeopyle combination epicystal, type [tA, tP], operculum usually attached on ventral surface. Principal archeopyle suture positioned immediately above paracingulum.
Dimensions: Length of holotype including antapical spine 67 µm, width 48 µm. Range of length (20 specimens) 52(61)71 µm, width 37(44)57 µm.
Affinities:
Backhouse, 1988, p.99: Moorodinium quindalupense is larger, possesses a larger antapical spine and less prominent paracingular transverse septa than M. spinatum.
Moorodinium quindalupense Backhouse, 1988, p.99, pl.33, figs.6–10; pl.34, fig.1. Holotype: Backhouse, 1988, pl.33, fig.9; Fensome et al., 1996, fig.3 — p.2313. Age: early Barremian.
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Locus typicus: Perth Basin, W Australia
Stratum typicum: Early Barremian
Original description: Backhouse, 1988, p.99
Medium-sized ovoid proximochorate cysts bearing a single broad, antapical spine. Epicyst not paratabulate under a light microscope, finely granular, bearing two membranous septa passing dorso-ventrally over apex of cyst. Septa up to 3 µm high, usually lower. Paratabulation on hypocyst indicated by low features in penitabular positions, number of paraplates not determined, but paratabulation appears similar to that of M. spinatum. Parasulcus weakly indicated by low surface features. Paracingulum indicated by low transverse septa, cross septa absent. Antapical spine up to 10 µm long, broadly based, asymmetrical and pointed, positioned in centre of antapical paraplate. Archeopyle combination epicystal, type [tA, tP], operculum usually attached on ventral surface. Principal archeopyle suture positioned immediately above paracingulum.
Dimensions: Length of holotype including antapical spine 67 µm, width 48 µm. Range of length (20 specimens) 52(61)71 µm, width 37(44)57 µm.
Affinities:
Backhouse, 1988, p.99: Moorodinium quindalupense is larger, possesses a larger antapical spine and less prominent paracingular transverse septa than M. spinatum.