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Javadinium matsuokae
From Fensome et al., 2019:
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We here consider this species to be a junior synonym of Selenopemphix quanta, as the images of the holotype do not convincingly show a precingular archeopyle
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Derivation of name: The species is named after the Japanese palynologist KAZUMI MATSUOKA.
Holotype: Pl. 8, Figs 9, 10. Sample CP-22, single grain -slide CP-22/9.
Paratypes: Single grain slides CP-20/3, CP-20/5, sample CP-20, CP-21/1, CP-21/3, CP-21/5, sample CP-21, CP-25/56, sample CP-25 and CP-40/21, sample CP-40.
Type locality: Cipamingkis River, West Java (fext-fig. 2). Cisubuh Formation, Late Miocene, Age N 17.
Diagnosis. Apically-antapically Compressed chorate cysts with a conical epicyst and pointed to rounded apex; The hypocyst is smaller than the epicyst with a rounded antapex, devoid of antapicaI horns or lobes. Surface of wall normally smooth to microgranular. Numerous long pointed, possibiy massive spines are locatted on the two folds of the cingulum, at the apex and antapex. The archeopyle is precingular (P), positioned mid-dorsal, opposite to the sulcus.
Description: The cysts show typically a polar compression. The epicyst is larger than the hypocyst, conical and has a pointed or rounded apex. At the apex several long, pointed spines arise, which seem to be massive. The height of the hypocyst is reduced; the antapex is rounded, without antapical horns or lobes. However the antapex is marked by a_ centrally located group of spines, often arranged in a semicircle, open towards the parasulcus. The surface of the cyst wall is smooth on most specimens; however, specimens with a microgranular surface occur. The cingulum is well defined by two parallel folds, from which numerous spines arise, and is interrupted on the ventral side by the parasulcus. Most specimens do not have an archeopyle. However, a few specimens show a precingular archeopyle (P) located mid-dorsally and opposite
to the parasulcus. The long pointed spines, typical for the species are normally concentrated at the apex, cingulum and antapex, while major other areas of the cysts remain free of appendages. However, a few specimens also have some spines on other areas of the epi- and hypocyst.
Dimensions: Length of cyst 44 (50) 55 μm, holotype 55 μm, maximum width of cyst (polar view) 65 (80) 95 μm, width of holotype 84 μm. Length of spines: -8 (20) 25 μm. 25 specimens measured.
---------------------------------------------------------------------------------------------------
We here consider this species to be a junior synonym of Selenopemphix quanta, as the images of the holotype do not convincingly show a precingular archeopyle
---------------------------------------------------------------------------------------------------
Derivation of name: The species is named after the Japanese palynologist KAZUMI MATSUOKA.
Holotype: Pl. 8, Figs 9, 10. Sample CP-22, single grain -slide CP-22/9.
Paratypes: Single grain slides CP-20/3, CP-20/5, sample CP-20, CP-21/1, CP-21/3, CP-21/5, sample CP-21, CP-25/56, sample CP-25 and CP-40/21, sample CP-40.
Type locality: Cipamingkis River, West Java (fext-fig. 2). Cisubuh Formation, Late Miocene, Age N 17.
Diagnosis. Apically-antapically Compressed chorate cysts with a conical epicyst and pointed to rounded apex; The hypocyst is smaller than the epicyst with a rounded antapex, devoid of antapicaI horns or lobes. Surface of wall normally smooth to microgranular. Numerous long pointed, possibiy massive spines are locatted on the two folds of the cingulum, at the apex and antapex. The archeopyle is precingular (P), positioned mid-dorsal, opposite to the sulcus.
Description: The cysts show typically a polar compression. The epicyst is larger than the hypocyst, conical and has a pointed or rounded apex. At the apex several long, pointed spines arise, which seem to be massive. The height of the hypocyst is reduced; the antapex is rounded, without antapical horns or lobes. However the antapex is marked by a_ centrally located group of spines, often arranged in a semicircle, open towards the parasulcus. The surface of the cyst wall is smooth on most specimens; however, specimens with a microgranular surface occur. The cingulum is well defined by two parallel folds, from which numerous spines arise, and is interrupted on the ventral side by the parasulcus. Most specimens do not have an archeopyle. However, a few specimens show a precingular archeopyle (P) located mid-dorsally and opposite
to the parasulcus. The long pointed spines, typical for the species are normally concentrated at the apex, cingulum and antapex, while major other areas of the cysts remain free of appendages. However, a few specimens also have some spines on other areas of the epi- and hypocyst.
Dimensions: Length of cyst 44 (50) 55 μm, holotype 55 μm, maximum width of cyst (polar view) 65 (80) 95 μm, width of holotype 84 μm. Length of spines: -8 (20) 25 μm. 25 specimens measured.