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Vesperopsis
From Fensome et al., 2019:
Vesperopsis Bint, 1986, p.156.
Emendations: Qiao Xiuyun et al., 1992, p.32–33,36–37; Wan Chuanbiao and Qiao Xiuyun, 1994, p.503; Mao Shaozhi et al., 1999, p.149–150.
Taxonomic junior synonym: Contrangularia, by implication in He Chengquan et al. (2009, p.307).
Type: Bint, 1986, pl.5, figs.9,12–13; text-fig.5, as Vesperopsis mayi.
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Original description: [Bint, 1986]:
Diagnosis:
Intermediate to large, dorso-ventrally compressed cysts with an apical two lateral, and two antapical horns. Lateral horns about equal in size, usually bearing a postcingular extension, and sometimes also bearing a precingular extension. Antapical horns subequal in size or right antapical reduced. Acavate, autophragm smooth and extremely thin.
Paratabulation not expressed. Cingulum may be indicated by indentation of the lateral horns, and occasionally by transverse lines, or may not be indicated; sulcus not indicated. Archeopyle apical, operculum usually in place and adnate, but may be broken away.
Archeopyle suture weakly angular and may be variably developed ranging from short lateral nicks between the apical and precingular series to a fully developed state in which there remains a mid-ventral attachment area between the operculum and the cyst body.
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Notes:
G.L. Williams short notes on species, Mesozoic-Cenozoic dinocyst course, Urbino, Italy, May 17-22, 1999 - LPP VIEWER CD-ROM 99.5.
Vesperopsis Bint, 1986, emend. Oiao Xiuyun et al., 1992. Diagnosis from Bint (1986, p.156), Intermediate to large, dorso-ventrally compressed cysts with an apical, two lateral and two antapical horns. Lateral horns about equal in size, usually bearing a postcingular extension and sometimes also bearing a precingular extension. Antapical horns subequal in size or right antapical reduced. Acavate, autophragm smooth and extremely thin. Paratabulation not expressed. Cingulum may be indicated by indentation of the lateral horns, and occasionally by transverse lines, or may not be indicated; sulcus not indicated. Archeopyle apical, operculum usually in place and adnate, but may be broken away. Archeopyle suture weakly angular and may be variably developed ranging from short lateral nicks between the apical and precingular series to a fully developed state in which there remains a mid-ventral attachment area between the operculum and the cyst body.
Vesperopsis Bint, 1986, p.156.
Emendations: Qiao Xiuyun et al., 1992, p.32–33,36–37; Wan Chuanbiao and Qiao Xiuyun, 1994, p.503; Mao Shaozhi et al., 1999, p.149–150.
Taxonomic junior synonym: Contrangularia, by implication in He Chengquan et al. (2009, p.307).
Type: Bint, 1986, pl.5, figs.9,12–13; text-fig.5, as Vesperopsis mayi.
---------------------------------------------------------------------------------------------------
Original description: [Bint, 1986]:
Diagnosis:
Intermediate to large, dorso-ventrally compressed cysts with an apical two lateral, and two antapical horns. Lateral horns about equal in size, usually bearing a postcingular extension, and sometimes also bearing a precingular extension. Antapical horns subequal in size or right antapical reduced. Acavate, autophragm smooth and extremely thin.
Paratabulation not expressed. Cingulum may be indicated by indentation of the lateral horns, and occasionally by transverse lines, or may not be indicated; sulcus not indicated. Archeopyle apical, operculum usually in place and adnate, but may be broken away.
Archeopyle suture weakly angular and may be variably developed ranging from short lateral nicks between the apical and precingular series to a fully developed state in which there remains a mid-ventral attachment area between the operculum and the cyst body.
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Notes:
G.L. Williams short notes on species, Mesozoic-Cenozoic dinocyst course, Urbino, Italy, May 17-22, 1999 - LPP VIEWER CD-ROM 99.5.
Vesperopsis Bint, 1986, emend. Oiao Xiuyun et al., 1992. Diagnosis from Bint (1986, p.156), Intermediate to large, dorso-ventrally compressed cysts with an apical, two lateral and two antapical horns. Lateral horns about equal in size, usually bearing a postcingular extension and sometimes also bearing a precingular extension. Antapical horns subequal in size or right antapical reduced. Acavate, autophragm smooth and extremely thin. Paratabulation not expressed. Cingulum may be indicated by indentation of the lateral horns, and occasionally by transverse lines, or may not be indicated; sulcus not indicated. Archeopyle apical, operculum usually in place and adnate, but may be broken away. Archeopyle suture weakly angular and may be variably developed ranging from short lateral nicks between the apical and precingular series to a fully developed state in which there remains a mid-ventral attachment area between the operculum and the cyst body.