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Scriniodinium amalthei
Scriniodinium? amalthei (Wetzel, 1966, p.318, pl.31, fig.6) Sarjeant, 1980b, p.117. Emendation: Sarjeant, 1980b, p.117, as Scriniodinium amalthei.
Originally Membranilarnacia, subsequently Membranilarnacia?, thirdly Scriniodinium, fourthly Endoscrinium, fifthly (and now) Scriniodinium?. Questionable assignment: Jan du Chêne et al. (1986a, p.317). Riding and Fensome (2003, p.13) implied effectively that the use of this name be restricted to the holotype.
Holotype: W. Wetzel, 1966, pl.31, fig.6
Age: Late Pliensbachian
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Original description: [Wetzel, 1966] (translated from German):
Membranilarnax amalthei n. sp.
Pl. 31, Fig. 6
Diagnosis: Thin-walled inner capsule with a smooth surface. Short, massive struts rise from it, which distally merge into a closed outer membrane.
The only available specimen (holotype) is in specimen Lühnde 5.
Dimensions: Diameter of the inner capsule 31 µ, of the outer shell 42 µ.
Comparison: The next youngest species of the genus have larger dimensions with a smaller distance between the outer shell and the capsule; only Membranilarnax sp. VALENSI 1953 (Pl. 9, Fig. 26) from the Dogger region matches our Liassic specimen.
Originally Membranilarnacia, subsequently Membranilarnacia?, thirdly Scriniodinium, fourthly Endoscrinium, fifthly (and now) Scriniodinium?. Questionable assignment: Jan du Chêne et al. (1986a, p.317). Riding and Fensome (2003, p.13) implied effectively that the use of this name be restricted to the holotype.
Holotype: W. Wetzel, 1966, pl.31, fig.6
Age: Late Pliensbachian
-------------------------------------------------------------------------------------------------------------------------
Original description: [Wetzel, 1966] (translated from German):
Membranilarnax amalthei n. sp.
Pl. 31, Fig. 6
Diagnosis: Thin-walled inner capsule with a smooth surface. Short, massive struts rise from it, which distally merge into a closed outer membrane.
The only available specimen (holotype) is in specimen Lühnde 5.
Dimensions: Diameter of the inner capsule 31 µ, of the outer shell 42 µ.
Comparison: The next youngest species of the genus have larger dimensions with a smaller distance between the outer shell and the capsule; only Membranilarnax sp. VALENSI 1953 (Pl. 9, Fig. 26) from the Dogger region matches our Liassic specimen.