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Hystrichosphaeropsis procera
From Fensome et al., 2019:
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Original description Morgenroth et al., 2008:
Derivation of name: Latin, procerus, slim, with reference to the slightly conical periblast.
Holotype: Pl. 7, Fig. 1. Sample KJ-17, single grain slide KJ-17/2.
Paratypes: Single grain slides KJ-9/10, KJ-9/14, sample KJ-9; KJ-17/1, KJ17/4, sample KJ-17 and KJ-24/3, KJ-24/S, sample KJ-24.
Type locality: Kali Jaya, Central Java (fext-fig. 4). ?Upper Early - Lower Middle Miocene, Age ?N 6, NB - N 11.
Diagnosis: A species of Hystrichosphaeropsis with the following characteristics: endoblast ovoidal to subspherical, wall smooth to finely granular; periblast marked by septa which delineate a gonyaulacalean field pattern; wall of periblast smooth to granular; the hypo-periblast is typically subconical, its width reducing from the cingulum towards the antapex; at the antapex the periblast is often rounded, sometimes
open.
Description: Typical for the new species is the shape of the periblast, the width of which gradually decreases from the cingulum towards the antapex giving it a subconical shape. At the antapex the periblast is often rounded and, on some specimens, open. The epipericoel ends in an apical boss.. On the periblast, a gonyaulacalean field pattern is well defined by septa of various heights. The septa may be denticulate at the
cingulum. The wall of the periblast is often microgranular, sometimes smooth. The endoblast is ovoidal to subspherical, its wall smooth to microgranular. The archeopyle is precingular (3").
Dimensions: Length of periblast,7 5 (84) 100 μm,h olotype 81 μm, width of periblast,4 1 (52) 65 μm, holotype_ 43 μm. Length of endoblast 48 (53) 62 μm, width of endoblast 30 (44) 62 μm. 25 specimens measured.
Comparisons: Hystrichosphaeropsis procera sp. nov. can be distinguished from Hystrichosphaeropsisobscura HABIB 1972 (compare DE VERTEIL & NORRIS 1996: Part I, pl. 6, figs 1-16), Hystrichosphaeropsis ovum DEFLANDRE (DEFLANDRE1936: pl. XII, figs 1一3) and Hystrichosphaeropsis somphosa WARNY and WRENN (WARNY & WRENN 1997: pl. 1,f igs 1-6) mainly by the characteristically shaped periblast.
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Original description Morgenroth et al., 2008:
Derivation of name: Latin, procerus, slim, with reference to the slightly conical periblast.
Holotype: Pl. 7, Fig. 1. Sample KJ-17, single grain slide KJ-17/2.
Paratypes: Single grain slides KJ-9/10, KJ-9/14, sample KJ-9; KJ-17/1, KJ17/4, sample KJ-17 and KJ-24/3, KJ-24/S, sample KJ-24.
Type locality: Kali Jaya, Central Java (fext-fig. 4). ?Upper Early - Lower Middle Miocene, Age ?N 6, NB - N 11.
Diagnosis: A species of Hystrichosphaeropsis with the following characteristics: endoblast ovoidal to subspherical, wall smooth to finely granular; periblast marked by septa which delineate a gonyaulacalean field pattern; wall of periblast smooth to granular; the hypo-periblast is typically subconical, its width reducing from the cingulum towards the antapex; at the antapex the periblast is often rounded, sometimes
open.
Description: Typical for the new species is the shape of the periblast, the width of which gradually decreases from the cingulum towards the antapex giving it a subconical shape. At the antapex the periblast is often rounded and, on some specimens, open. The epipericoel ends in an apical boss.. On the periblast, a gonyaulacalean field pattern is well defined by septa of various heights. The septa may be denticulate at the
cingulum. The wall of the periblast is often microgranular, sometimes smooth. The endoblast is ovoidal to subspherical, its wall smooth to microgranular. The archeopyle is precingular (3").
Dimensions: Length of periblast,7 5 (84) 100 μm,h olotype 81 μm, width of periblast,4 1 (52) 65 μm, holotype_ 43 μm. Length of endoblast 48 (53) 62 μm, width of endoblast 30 (44) 62 μm. 25 specimens measured.
Comparisons: Hystrichosphaeropsis procera sp. nov. can be distinguished from Hystrichosphaeropsisobscura HABIB 1972 (compare DE VERTEIL & NORRIS 1996: Part I, pl. 6, figs 1-16), Hystrichosphaeropsis ovum DEFLANDRE (DEFLANDRE1936: pl. XII, figs 1一3) and Hystrichosphaeropsis somphosa WARNY and WRENN (WARNY & WRENN 1997: pl. 1,f igs 1-6) mainly by the characteristically shaped periblast.