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Achilleodinium arboriforme
From Fensome et al., 2019:
Achilleodinium? arboriforme, Marheinecke, 1992, p.55–56, pl.9, figs.7–8,10–11.
Holotype: Marheinecke, 1992, pl.9, figs.7–8,10.
Questionable assignment: Marheinecke (1992, p.55). Contrary to the opinion of Lentin and Williams (1993, p.4), this name was considered validly published by Williams et al. (1998, p.21).
Age: early–late Maastrichtian.
Locus typicus: Hemmoor, Lower Saxony, Germany
Stratum typicum: Late Maastrichtian
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Original description: [Marheinecke, 1992, p. 55] (Translation: LPP)]:
Description:
Cyst habit sphaeroidal to subsphaeroidal. Wall composed of pedium and luxuria. Luxuria spongious and develops between processes a net-like, fibrous surface.
Processes: intraareate, striate and at the base slightly fibrous, hollow cylindrical to slightly compressed cylindrical. Sometimes distally multifurcate, margin arborifome. Smaller processes in the sulcal area, which are thinner and bear usually joint "arbores". Cingular processes are usually flattened.
Wall of processes thick and spongious. Accedation formula: 4', 6'', 6c, 5''', 1p, 1'''', xs.
Archaeopyle: precingular, 3''. Operculum secate.
Affinities:
This species differs from A.bianii in having aboriforme processes and the low number of sulcal processes. The shape of the processes reminds on Cordosphaeridium cantharellum, but differs in composition of the wall and processes.
Achilleodinium? arboriforme, Marheinecke, 1992, p.55–56, pl.9, figs.7–8,10–11.
Holotype: Marheinecke, 1992, pl.9, figs.7–8,10.
Questionable assignment: Marheinecke (1992, p.55). Contrary to the opinion of Lentin and Williams (1993, p.4), this name was considered validly published by Williams et al. (1998, p.21).
Age: early–late Maastrichtian.
Locus typicus: Hemmoor, Lower Saxony, Germany
Stratum typicum: Late Maastrichtian
---------------------------------------------------------------------------------------------------
Original description: [Marheinecke, 1992, p. 55] (Translation: LPP)]:
Description:
Cyst habit sphaeroidal to subsphaeroidal. Wall composed of pedium and luxuria. Luxuria spongious and develops between processes a net-like, fibrous surface.
Processes: intraareate, striate and at the base slightly fibrous, hollow cylindrical to slightly compressed cylindrical. Sometimes distally multifurcate, margin arborifome. Smaller processes in the sulcal area, which are thinner and bear usually joint "arbores". Cingular processes are usually flattened.
Wall of processes thick and spongious. Accedation formula: 4', 6'', 6c, 5''', 1p, 1'''', xs.
Archaeopyle: precingular, 3''. Operculum secate.
Affinities:
This species differs from A.bianii in having aboriforme processes and the low number of sulcal processes. The shape of the processes reminds on Cordosphaeridium cantharellum, but differs in composition of the wall and processes.