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Vesperopsis granulata
From Fensome et al., 2019:
Vesperopsis granulata (Wan Chuanbiao and Zhang Ying, 1990, p.12, pl.3, figs.7–9) He Chengquan et al., 2009, p.307. Emendation: Mao Shaozhi et al., 1999, p.155.
Holotype: Wan Chuanbiao and Zhang Ying, 1990, pl.3, fig.8.
Originally Contrangularia, subsequently (and now) Vesperopsis. He Chengquan et al., (2009, p.307) incorrectly considered the new combination to be a "stat. nov." as well as a "comb nov".
Age: Early Cretaceous.
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Description by Qiao Xiuyun et al., 1992:
Vesperopsis granulata Qiao, He and Gao
(Plate 6. Figures 1-4) Berriasian.
1992 Vesperopsis granulata Qiao, He et Gao, Qiao Xiuyun et al., pp. 33, 37, plate 1. Figures 10-12.
Description: The cyst is appressed, flattened dorsally and ventrally, with a nearly circular body, bearing one apical, lateral, and two caudal horns, all of which, except the apical horn, are conical. The apical horn is oblate and conical, larger than the other horns, with a broad, rounded tip. The left horn is quite prominent, extending obliquely upward from the left anterior lumbar region. Its size varies; in larger individuals, the two caudal horns are nearly equal in size, with blunt apex. The right horn is absent. The two caudal horns are nearly equal in size, strongly diverging, abutting each other at the base, and pointed at the apex. The prototheca is extremely thin and pale, with a surface that is sparsely finely grained to weakly wrinkled, with irregular folds, reflecting the absence of a girdle.
The reflected plate type is represented only by the ancient mouth. The ancient mouth top type is formed by the cracking of the top area. The main ancient mouth seam is slightly angular on the back, and the mouth cover is in place and connected on the ventral side.
The length of the cyst is 58.1-75.0µm, the width (excluding the lateral angles) is 40.0-41.4µm, the apical angle is 20.0-26.0µm, the lateral angles are 11.2-25.0µm, and the caudal angle is 13.5-25.0µm.
This species is distinguished from Vesperopsis glabra by its nearly round body and sparsely granular, short, wrinkled wall surface. Qiao, He et Gao.
The origin is Shahezi Formation, Taikang County, Heilongjiang Province.
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Emended description (Mao Shaozhi et al., 1999):
Contranularia granulate (Wan & Zhang 1990) emend. Nov. (Pl. IV, Fig. 4; Pl. V, Fig. 5)
Contrangularia granulate Wan & Zhang 1990, p. 12, Pl. III, Fig. 8.
Emended description: A species of Contranularia that has usually a longer and narrow left precingular horn upwards, a short and broad right precingular horn downwards and granulate ornamentation on wall surface.
Comparison. The species differs from Contrangularia reticulate in having granulate ornamentation on wall surface and in being slightly smaller than the latter species.
Location and horizon: Xin-Balhu Zhouqi of the Hailaer Basin, the second Member of the Damoguehe Formation, Hauterivian.
Vesperopsis granulata (Wan Chuanbiao and Zhang Ying, 1990, p.12, pl.3, figs.7–9) He Chengquan et al., 2009, p.307. Emendation: Mao Shaozhi et al., 1999, p.155.
Holotype: Wan Chuanbiao and Zhang Ying, 1990, pl.3, fig.8.
Originally Contrangularia, subsequently (and now) Vesperopsis. He Chengquan et al., (2009, p.307) incorrectly considered the new combination to be a "stat. nov." as well as a "comb nov".
Age: Early Cretaceous.
---------------------------------------------------------------------------------------------------
Description by Qiao Xiuyun et al., 1992:
Vesperopsis granulata Qiao, He and Gao
(Plate 6. Figures 1-4) Berriasian.
1992 Vesperopsis granulata Qiao, He et Gao, Qiao Xiuyun et al., pp. 33, 37, plate 1. Figures 10-12.
Description: The cyst is appressed, flattened dorsally and ventrally, with a nearly circular body, bearing one apical, lateral, and two caudal horns, all of which, except the apical horn, are conical. The apical horn is oblate and conical, larger than the other horns, with a broad, rounded tip. The left horn is quite prominent, extending obliquely upward from the left anterior lumbar region. Its size varies; in larger individuals, the two caudal horns are nearly equal in size, with blunt apex. The right horn is absent. The two caudal horns are nearly equal in size, strongly diverging, abutting each other at the base, and pointed at the apex. The prototheca is extremely thin and pale, with a surface that is sparsely finely grained to weakly wrinkled, with irregular folds, reflecting the absence of a girdle.
The reflected plate type is represented only by the ancient mouth. The ancient mouth top type is formed by the cracking of the top area. The main ancient mouth seam is slightly angular on the back, and the mouth cover is in place and connected on the ventral side.
The length of the cyst is 58.1-75.0µm, the width (excluding the lateral angles) is 40.0-41.4µm, the apical angle is 20.0-26.0µm, the lateral angles are 11.2-25.0µm, and the caudal angle is 13.5-25.0µm.
This species is distinguished from Vesperopsis glabra by its nearly round body and sparsely granular, short, wrinkled wall surface. Qiao, He et Gao.
The origin is Shahezi Formation, Taikang County, Heilongjiang Province.
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Emended description (Mao Shaozhi et al., 1999):
Contranularia granulate (Wan & Zhang 1990) emend. Nov. (Pl. IV, Fig. 4; Pl. V, Fig. 5)
Contrangularia granulate Wan & Zhang 1990, p. 12, Pl. III, Fig. 8.
Emended description: A species of Contranularia that has usually a longer and narrow left precingular horn upwards, a short and broad right precingular horn downwards and granulate ornamentation on wall surface.
Comparison. The species differs from Contrangularia reticulate in having granulate ornamentation on wall surface and in being slightly smaller than the latter species.
Location and horizon: Xin-Balhu Zhouqi of the Hailaer Basin, the second Member of the Damoguehe Formation, Hauterivian.