Back
Surculosphaeridium convocatum
From Fensome et al., 2019:
Surculosphaeridium convocatum Fensome et al., 2016b, p.70, pl.14, figs.6–8. Holotype: Fensome et al., 2016b, pl.14, fig.7. Age: last occurrence, early Campanian.
---------------------------------------------------------------------------------------------------
Original description Fensome et al., 2016b:
Holotype. Plate 14, fig. 7, from a cuttings sample at 3510–3520 m in South Labrador N-19, GSC type collection no. 138128, sample P39834, slide 01, coordinates 7.8 × 99.1, England Finder G29/3‒H28/2. Central body length (without apical operculum) 30 μm, central body width 38 μm, processes up to about 12 μm. The sample from which the holotype derives is dated as Barremian‒Aptian, indicating that the specimen represents caving.
Etymology. The epithet is from the Latin convocatum, to call together or assemble, in reference to the grouping of several processes per plate common in this species.
Diagnosis. A species of Surculosphaeridium in which at least the larger plates have more than one and up to four processes per plate. Processes may branch along their length and are always furcate distally.
Size. Central body length (without apical operculum) 29‒34 μm, central body width 30‒38 μm, processes up to about 15 μm; three specimens measured.
Age. LO: early Campanian. Not plotted.
Remarks. Some plates, especially smaller ones such as cingulars, sulcals and apicals, may have only one process per plate, but others have two to four. Processes are characteristically furcate distally. Surculosphaeridium longifurcatum has one process per plate.
Surculosphaeridium convocatum Fensome et al., 2016b, p.70, pl.14, figs.6–8. Holotype: Fensome et al., 2016b, pl.14, fig.7. Age: last occurrence, early Campanian.
---------------------------------------------------------------------------------------------------
Original description Fensome et al., 2016b:
Holotype. Plate 14, fig. 7, from a cuttings sample at 3510–3520 m in South Labrador N-19, GSC type collection no. 138128, sample P39834, slide 01, coordinates 7.8 × 99.1, England Finder G29/3‒H28/2. Central body length (without apical operculum) 30 μm, central body width 38 μm, processes up to about 12 μm. The sample from which the holotype derives is dated as Barremian‒Aptian, indicating that the specimen represents caving.
Etymology. The epithet is from the Latin convocatum, to call together or assemble, in reference to the grouping of several processes per plate common in this species.
Diagnosis. A species of Surculosphaeridium in which at least the larger plates have more than one and up to four processes per plate. Processes may branch along their length and are always furcate distally.
Size. Central body length (without apical operculum) 29‒34 μm, central body width 30‒38 μm, processes up to about 15 μm; three specimens measured.
Age. LO: early Campanian. Not plotted.
Remarks. Some plates, especially smaller ones such as cingulars, sulcals and apicals, may have only one process per plate, but others have two to four. Processes are characteristically furcate distally. Surculosphaeridium longifurcatum has one process per plate.