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Palleodinium digitatum
Plate 14, Figures 9, 10. Plate 17, Figure 13
Rhombodella spp. TORRICELLI 2001, pl. 8, fig. 20.
Holotype: Plate 14, Figure 10
Paratype: Plate 17, Figure 13
Type Locality: Vergol outcrop, early Valanginian, inostranzewi Zone. Holotype: Bed V91M, inostranzewi Sub-zone, Slide V91M(schulze), E.F. R48.2. Paratype: Bed V97M, platycostatus
Sub-zone, Slide V97M(A), E.F. C47.3.
Derivation of Name: From the Latin digitatus, having fingers – in reference to the distal complexity of the spines. Diagnosis: As for the genus.
Dimensions: Holotype 46 × 46 μm. Paratype 35 × 35 μm.
Overall 46 (38) 33 μm × 46 (41) 30 μm.
Specimens measured – 9.
Remarks: The number of primary spines observed in this species varies with up to six at each circum-polar area and these are presumed to reflect the precingular and postcingular series. The finely- ramifying spine terminations are similar to those of Cauca perplexa Duxbury 2023, another small species, although the latter is significantly younger, the primary spines are flattened (those in P. digitatum are not) and the archeopyle is epicystal. Palleodinium digitatum n. gen. n. sp. was observed from the base of Bed V87 (sample included in Appendix 3), immediately below Barrande layer B1 to Bed V124M at Vergol, early Valanginian, inostranzewi Zone, inostranzewi Sub-zone to late Valanginian, peregrinus Zone, peregrinus Sub-zone. A slightly longer Tethyan range is suggested however, as this species has also been recorded towards the base of the Valanginian, pertransiens Zone, premolicus Sub-zone in Spain (pers. obs.) and a single specimen was illustrated in Torricelli 2001 (pl. 8, fig. 20 as Rhombodella spp.), from the lower Hauterivian of the Vallone Rosmarino section, Sicily. The specimen illustrated by Helby et al. (1988, fig. 18, A, B) and referred to Oligosphaeridium? sp. nov. A appears to be very similar to P. digitatum but Helby et al. provided no description. Also, their Australian species is restricted to the "lower Tithonian" Puti Siltstone.
Rhombodella spp. TORRICELLI 2001, pl. 8, fig. 20.
Holotype: Plate 14, Figure 10
Paratype: Plate 17, Figure 13
Type Locality: Vergol outcrop, early Valanginian, inostranzewi Zone. Holotype: Bed V91M, inostranzewi Sub-zone, Slide V91M(schulze), E.F. R48.2. Paratype: Bed V97M, platycostatus
Sub-zone, Slide V97M(A), E.F. C47.3.
Derivation of Name: From the Latin digitatus, having fingers – in reference to the distal complexity of the spines. Diagnosis: As for the genus.
Dimensions: Holotype 46 × 46 μm. Paratype 35 × 35 μm.
Overall 46 (38) 33 μm × 46 (41) 30 μm.
Specimens measured – 9.
Remarks: The number of primary spines observed in this species varies with up to six at each circum-polar area and these are presumed to reflect the precingular and postcingular series. The finely- ramifying spine terminations are similar to those of Cauca perplexa Duxbury 2023, another small species, although the latter is significantly younger, the primary spines are flattened (those in P. digitatum are not) and the archeopyle is epicystal. Palleodinium digitatum n. gen. n. sp. was observed from the base of Bed V87 (sample included in Appendix 3), immediately below Barrande layer B1 to Bed V124M at Vergol, early Valanginian, inostranzewi Zone, inostranzewi Sub-zone to late Valanginian, peregrinus Zone, peregrinus Sub-zone. A slightly longer Tethyan range is suggested however, as this species has also been recorded towards the base of the Valanginian, pertransiens Zone, premolicus Sub-zone in Spain (pers. obs.) and a single specimen was illustrated in Torricelli 2001 (pl. 8, fig. 20 as Rhombodella spp.), from the lower Hauterivian of the Vallone Rosmarino section, Sicily. The specimen illustrated by Helby et al. (1988, fig. 18, A, B) and referred to Oligosphaeridium? sp. nov. A appears to be very similar to P. digitatum but Helby et al. provided no description. Also, their Australian species is restricted to the "lower Tithonian" Puti Siltstone.