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Mikrocysta
From Williams et al., 2017:
[Mikrocysta, Bjaerke, 1980, p. 71; Emendation: Below, 1987b, p. 13-14
Type species: Mikrocysta erugata, Bjaerke, 1980 (pl.5, fig.10)] ; emend. Below, 1987
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Original description: [Bjaerke, 1980]: (Translation: Fensome et al., 1991, p. 353-354):
Diagnosis:
Proximate dinoflagellate cyst. Cyst wall formed by autophragm only.
Archaeopyle complex, formed by apical and intercalary paraplates. Tabulation otherwise not reflected. Epicyst and hypocyst semispherical separated by a relatively wide equatorial constriction.
Affinities:
This genus resembles Biorbifea Habib, 1972 and Horologinella Cookson and Eisenack, 1962. It differs from Biorbifera in archaeopyle formation and from Horologinella by lacking distinctive paratabulation.
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Emended description:
Below, 1987:
Diagnosis:
Arrangement of vesicles/plates on the dinoflagellate amphiesma PR, 5`, 3a-4a, 7``, 7c, 6```, 2````, as, FM subdivided into periflagellar platelets, ls, rs, ps; pentagonal 1```` and hexagonal 2```` partiform, omegaform ps very large.
Cyst habit proximate, proximochorate, acavate-cavate, spheroidal, ovaloidal, ovoidal, elongate, cruciform, polyhedral, equatorial section circular to lenticular; size usually small; wall composed of pedium or also of luxuria, surface glabrous or ornamented, nonareate or subdivided into areas by finate, limbate, or intraareate ornament; areation formula NR PR/XPR, NR`/5`, NRa/3a-5a, NR``/7``, NRc/7c, NR```/6```, NR````/2````, NRs/as, ls, FM seldom subdivided into very small areas, ps; porichnion on finis 5`/1`; 1```` and hexagonal 2```` partiform, omegaform ps very large; archaeopyle apical, 3`+4`, also amplificate, operculum solvate, secate, opercular formula 3`(s)+4`(s).
[Mikrocysta, Bjaerke, 1980, p. 71; Emendation: Below, 1987b, p. 13-14
Type species: Mikrocysta erugata, Bjaerke, 1980 (pl.5, fig.10)] ; emend. Below, 1987
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Original description: [Bjaerke, 1980]: (Translation: Fensome et al., 1991, p. 353-354):
Diagnosis:
Proximate dinoflagellate cyst. Cyst wall formed by autophragm only.
Archaeopyle complex, formed by apical and intercalary paraplates. Tabulation otherwise not reflected. Epicyst and hypocyst semispherical separated by a relatively wide equatorial constriction.
Affinities:
This genus resembles Biorbifea Habib, 1972 and Horologinella Cookson and Eisenack, 1962. It differs from Biorbifera in archaeopyle formation and from Horologinella by lacking distinctive paratabulation.
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Emended description:
Below, 1987:
Diagnosis:
Arrangement of vesicles/plates on the dinoflagellate amphiesma PR, 5`, 3a-4a, 7``, 7c, 6```, 2````, as, FM subdivided into periflagellar platelets, ls, rs, ps; pentagonal 1```` and hexagonal 2```` partiform, omegaform ps very large.
Cyst habit proximate, proximochorate, acavate-cavate, spheroidal, ovaloidal, ovoidal, elongate, cruciform, polyhedral, equatorial section circular to lenticular; size usually small; wall composed of pedium or also of luxuria, surface glabrous or ornamented, nonareate or subdivided into areas by finate, limbate, or intraareate ornament; areation formula NR PR/XPR, NR`/5`, NRa/3a-5a, NR``/7``, NRc/7c, NR```/6```, NR````/2````, NRs/as, ls, FM seldom subdivided into very small areas, ps; porichnion on finis 5`/1`; 1```` and hexagonal 2```` partiform, omegaform ps very large; archaeopyle apical, 3`+4`, also amplificate, operculum solvate, secate, opercular formula 3`(s)+4`(s).