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Hapsocysta minuta
Plate 8, Figures 21, 25. Plate 15, Figures 8, 9
Holotype: Plate 8, Figure 25
Paratype: Plate 8, Figure 21
Type Locality: Vergol outcrop. Holotype: early Valanginian, Bed V88, inostranzewi ammonite Zone, inostranzewi Sub-zone, slide V88(Schulze), E.F. W49.0. Paratype: late Valanginian, Bed V101M, base verrucosum ammonite Zone, verrucosum Subzone, slide V101/1, E.F. G43.2
Derivation of Name: From the Latin minutus, little, small - in reference to the small size of this species.
Diagnosis: A small, spheroidal dinocyst species consisting of a clearly-defined, smooth, elongate endocyst with a small, distally rounded apical projection. A spheroidal, open trabecular (sutural) network supports a delicate, fine-meshed reticulum. Individual sutures are V-shaped in cross-section, composed of a thickened, linear base and two smooth, ribbon-like flanges.
Dimensions: Holotype 41 × 33 μm.
Paratype 30 × 28 μm.
Overall 41 (34) 30 μm × 33 (31) 28 μm.
Specimens measured – 4.
Remarks: This species has been placed in Hapsocysta Davey 1979a because it is essentially an open meshwork, composed of narrow strands, outlining a so-far unresolved tabulation and surrounding an endocyst. The small size, delicate fine-meshed reticulum infilling the trabecular network and elongate endocyst with a rounded apical projection set this species apart from others of this genus. The archeopyle type could not be determined. Hapsocysta minuta was restricted to the early/late Valanginian boundary section at Vergol, Samples V87 to V102M, inostranzewi Zone, inostranzewi Sub-zone to verrucosum Zone, verrucosum Sub-zone.
Holotype: Plate 8, Figure 25
Paratype: Plate 8, Figure 21
Type Locality: Vergol outcrop. Holotype: early Valanginian, Bed V88, inostranzewi ammonite Zone, inostranzewi Sub-zone, slide V88(Schulze), E.F. W49.0. Paratype: late Valanginian, Bed V101M, base verrucosum ammonite Zone, verrucosum Subzone, slide V101/1, E.F. G43.2
Derivation of Name: From the Latin minutus, little, small - in reference to the small size of this species.
Diagnosis: A small, spheroidal dinocyst species consisting of a clearly-defined, smooth, elongate endocyst with a small, distally rounded apical projection. A spheroidal, open trabecular (sutural) network supports a delicate, fine-meshed reticulum. Individual sutures are V-shaped in cross-section, composed of a thickened, linear base and two smooth, ribbon-like flanges.
Dimensions: Holotype 41 × 33 μm.
Paratype 30 × 28 μm.
Overall 41 (34) 30 μm × 33 (31) 28 μm.
Specimens measured – 4.
Remarks: This species has been placed in Hapsocysta Davey 1979a because it is essentially an open meshwork, composed of narrow strands, outlining a so-far unresolved tabulation and surrounding an endocyst. The small size, delicate fine-meshed reticulum infilling the trabecular network and elongate endocyst with a rounded apical projection set this species apart from others of this genus. The archeopyle type could not be determined. Hapsocysta minuta was restricted to the early/late Valanginian boundary section at Vergol, Samples V87 to V102M, inostranzewi Zone, inostranzewi Sub-zone to verrucosum Zone, verrucosum Sub-zone.