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Bipolaribucina
From Williams et al., 2017:
[Bipolaribucina, Jiabo, 1978, p. 57
Although the "type species" was not validly transferred by Jiabo (1978), the generic name Bipolaribucina was validly published by these authors, since it is based on a previously validly published species name (I.C.N. Article 40.3).
Type species: originally as Hystrichosphaeridium paradoxum, Brosius, 1963 (pl.4, fig.6)] ; Bipolaribucina paradoxa, Lentin and Williams, 1981
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Original description: [Jiabo, 1978]: (Translation: Chen et al.,1988, p. 6):
Description:
Cysts chorate, ellipsoidal or ovoidal in shape, wall thin; surface smooth or scabrate. Processes, which are distributed mainly in the polar region and are sparse or absent in the equatorial area, are tubular and open, or closed distally, or nontabular and furcate. Number of processes varies, usually 10-15. Paratabulation uncertain; archeopyle possibly apical.
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Chen et al., 1988, p. 7:
Remarks:
When Sung Zhi-chen et al., 1978, (al. Jiabo, 1978) proposed Bipolaribucina, they obviously intended to establish Hystrichosphaeridium paradoxum Brosius, 1963, as its type species. However, they failed to give a complete citation and make reference to the basionym. These omissions were rectified when Lentin and Williams, 1981, provided a full and direct reference for the type species.
The generic description of Bipolaribucina accords unfavorably with the morphology of its type species and the other species of Bipolaribucina show little resemblance to Hystrichosphaeridium paradoxum. Moreover, uncertainties remain about the archeopyle and the exact nature of the processes on the species of Bipolaribucina proposed by Sung Zhi-chen et al., 1978. Pending re-examination of all these species, we prefer to: (1) reject the transfer of Hystrichosphaeridium paradoxum to Bipolaribucina and retain the species in Distatodinium Eaton, 1976 (its last previous assignment), thereby making Bipolaribucina a junior synonym of Distatodinium; and (2) transfer the remaining species of Bipolaribucina to Impletosphaeridium Morgenroth 1966.
[Bipolaribucina, Jiabo, 1978, p. 57
Although the "type species" was not validly transferred by Jiabo (1978), the generic name Bipolaribucina was validly published by these authors, since it is based on a previously validly published species name (I.C.N. Article 40.3).
Type species: originally as Hystrichosphaeridium paradoxum, Brosius, 1963 (pl.4, fig.6)] ; Bipolaribucina paradoxa, Lentin and Williams, 1981
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Original description: [Jiabo, 1978]: (Translation: Chen et al.,1988, p. 6):
Description:
Cysts chorate, ellipsoidal or ovoidal in shape, wall thin; surface smooth or scabrate. Processes, which are distributed mainly in the polar region and are sparse or absent in the equatorial area, are tubular and open, or closed distally, or nontabular and furcate. Number of processes varies, usually 10-15. Paratabulation uncertain; archeopyle possibly apical.
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Chen et al., 1988, p. 7:
Remarks:
When Sung Zhi-chen et al., 1978, (al. Jiabo, 1978) proposed Bipolaribucina, they obviously intended to establish Hystrichosphaeridium paradoxum Brosius, 1963, as its type species. However, they failed to give a complete citation and make reference to the basionym. These omissions were rectified when Lentin and Williams, 1981, provided a full and direct reference for the type species.
The generic description of Bipolaribucina accords unfavorably with the morphology of its type species and the other species of Bipolaribucina show little resemblance to Hystrichosphaeridium paradoxum. Moreover, uncertainties remain about the archeopyle and the exact nature of the processes on the species of Bipolaribucina proposed by Sung Zhi-chen et al., 1978. Pending re-examination of all these species, we prefer to: (1) reject the transfer of Hystrichosphaeridium paradoxum to Bipolaribucina and retain the species in Distatodinium Eaton, 1976 (its last previous assignment), thereby making Bipolaribucina a junior synonym of Distatodinium; and (2) transfer the remaining species of Bipolaribucina to Impletosphaeridium Morgenroth 1966.