Back
Aprobolocysta varigranosa
From Fensome et al., 2019:
Aprobolocysta varigranosa, Duxbury, 1977, p.53–54, pl.14, figs.6–7; text-figs.20a–b.
Holotype: Duxbury, 1977, pl.14, fig.6; text-fig.20b; Pourtoy, 1988, pl.2, figs.1–2.
Originally Aprobolocysta, subsequently Batioladinium, thirdly Aprolobocysta?.
Questionable assignment: Lentin and Vozzhennikova (1990, p.82).
Taxonomic senior synonym: Batioladinium? (as Necrobroomea) gochtii, according to Below (1990, p.53).
Age: early Valanginian–early Hauterivian.
Locus typicus: Speeton Clay, Speeton, England
---------------------------------------------------------------------------------------------------
Original description: [Duxbury 1977, p. 53-54]:
Diagnosis:
An elongate ovoidal proximate cyst. Surface of body covered with irregular granular ornament which varies in coarseness. The lower third of the body bears well-developed (up to two microns) ornament which becomes gradually finer towards the apex. In the apical region the ornament is again coarse. There is no apical prominence, but there is some indication at the antapex of two poorly developed protuberances, normally only represented by local increases in ornament height.
Dimensions:
Holotype (complete) 73 x 41 µm; complete specimens overall 75-69 x 46-36 µm; archaeopyle formed 83-61 x 46-37 µm.
Affinities:
Aprobolocysta varigranosa is easily distinguished from Aprobolocysta eilema since the former has no obvious separation of endo- and periphragm, variable body ornament and usually some indication of antapical projections, whereas the latter has a distinctive, perforate periphragm, regular, granular endophragm ornament and no apical or antapical projections.
Aprobolocysta varigranosa, Duxbury, 1977, p.53–54, pl.14, figs.6–7; text-figs.20a–b.
Holotype: Duxbury, 1977, pl.14, fig.6; text-fig.20b; Pourtoy, 1988, pl.2, figs.1–2.
Originally Aprobolocysta, subsequently Batioladinium, thirdly Aprolobocysta?.
Questionable assignment: Lentin and Vozzhennikova (1990, p.82).
Taxonomic senior synonym: Batioladinium? (as Necrobroomea) gochtii, according to Below (1990, p.53).
Age: early Valanginian–early Hauterivian.
Locus typicus: Speeton Clay, Speeton, England
---------------------------------------------------------------------------------------------------
Original description: [Duxbury 1977, p. 53-54]:
Diagnosis:
An elongate ovoidal proximate cyst. Surface of body covered with irregular granular ornament which varies in coarseness. The lower third of the body bears well-developed (up to two microns) ornament which becomes gradually finer towards the apex. In the apical region the ornament is again coarse. There is no apical prominence, but there is some indication at the antapex of two poorly developed protuberances, normally only represented by local increases in ornament height.
Dimensions:
Holotype (complete) 73 x 41 µm; complete specimens overall 75-69 x 46-36 µm; archaeopyle formed 83-61 x 46-37 µm.
Affinities:
Aprobolocysta varigranosa is easily distinguished from Aprobolocysta eilema since the former has no obvious separation of endo- and periphragm, variable body ornament and usually some indication of antapical projections, whereas the latter has a distinctive, perforate periphragm, regular, granular endophragm ornament and no apical or antapical projections.