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Spiculodinium inordinatum
Plate 18, Figures 2, 3, 6, 12, 13
Holotype: Plate 18, Figure 3
Type Locality: Vergol outcrop, early Valanginian, Bed V26M, pertransiens Zone, salinarium Sub-zone. Holotype: Slide V26M/1, E.F. O38.0.
Derivation of Name: From the Latin inordinatus, disorderly, irregular- in reference to the irregular nature of this species.
Diagnosis: A moderately large, fairly thick-walled species with an ovoidal main body and a single-plate precingular archeopyle (3''). The test surface is produced into irregular, fibro-perforate extensions, ranging from simple spines to broad structures with or without distal spines. A broad, arcuate structure is at the antapex and ridges or surface folds can connect individual extensions, possibly marking sutures.
Dimensions: Holotype 89 × 76 μm.
Overall - 119 (94) 73 μm × 101 (80) 63 μm.
Specimens measured - 7.
Remarks: Spiculodinium? inordinatum n. sp. is only tentatively assigned to this genus because it does not possess clear gonal and sutural processes with terminal spikes typical of Spiculodinium neptuni (Eisenack 1958) Duxbury 2018, Spiculodinium alatum (Duxbury 1977) Duxbury 2018 and Spiculodinium verdieri (Below 1982c) Duxbury 2018. The fibro-perforate nature of this species and the single-plate precingular archeopyle are characteristic, however, suggesting that this species could be a particularly "degenerate" Spiculodinium.
This species has a very restricted stratigraphic range at Vergol, entirely within the early Valanginian, between Beds V26M and V59M, pertransiens Zone, salinarium Sub-zone to neocomiensiformis Zone, neocomiensiformis Sub-zone.
Holotype: Plate 18, Figure 3
Type Locality: Vergol outcrop, early Valanginian, Bed V26M, pertransiens Zone, salinarium Sub-zone. Holotype: Slide V26M/1, E.F. O38.0.
Derivation of Name: From the Latin inordinatus, disorderly, irregular- in reference to the irregular nature of this species.
Diagnosis: A moderately large, fairly thick-walled species with an ovoidal main body and a single-plate precingular archeopyle (3''). The test surface is produced into irregular, fibro-perforate extensions, ranging from simple spines to broad structures with or without distal spines. A broad, arcuate structure is at the antapex and ridges or surface folds can connect individual extensions, possibly marking sutures.
Dimensions: Holotype 89 × 76 μm.
Overall - 119 (94) 73 μm × 101 (80) 63 μm.
Specimens measured - 7.
Remarks: Spiculodinium? inordinatum n. sp. is only tentatively assigned to this genus because it does not possess clear gonal and sutural processes with terminal spikes typical of Spiculodinium neptuni (Eisenack 1958) Duxbury 2018, Spiculodinium alatum (Duxbury 1977) Duxbury 2018 and Spiculodinium verdieri (Below 1982c) Duxbury 2018. The fibro-perforate nature of this species and the single-plate precingular archeopyle are characteristic, however, suggesting that this species could be a particularly "degenerate" Spiculodinium.
This species has a very restricted stratigraphic range at Vergol, entirely within the early Valanginian, between Beds V26M and V59M, pertransiens Zone, salinarium Sub-zone to neocomiensiformis Zone, neocomiensiformis Sub-zone.