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Gochteodinia procera
From Fensome et al., 2019:
Gochteodinia procera Riding in Abbink et al., 2001, p.300–301, figs.9L–O. Holotype: Abbink et al., 2001, fig.9L. Age: late Volgian.
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Original description (Abbink et al., 2001):
Gochteodinia procera Riding sp. nov. (Figs 9L-0)
1982 Gochteodinia sp. I Davey, p. 24, pi. 6, figs. 14,15.
Diagnosis. A species of Gochteodinia, with a subspherical to ovoidal/elongate ovoidal ambitus in dorso-ventral view. The cyst is dorso-ventrally flattened. A small, distally rounded apical horn or protuberance may be developed; this feature, however, is commonly not developed. Antapical horns, protuberances etc. are consistently lacking. Autophragm relatively thick, microscabrate to scabrate, covered by about 40 to 50 long, sinuous, slender, solid processes. The processes are simple, capitate or furcate (normally bifurcate) with the branching rarely occurring up to the central part of the process. The distal parts of the processes are commonly connected by trabeculae; non-trabeculate processes are normally distally bifurcate or capitate. Lineations of processes may indicate the positions, and paratabulation, of the paracingulum and parasulcus. The archaeopyle is anterior intercalary, where two paraplates are displaced (type 21). The operculum is compound and the opercular pieces are free.
Remarks. Gochteodinia procera sp. nov. is distinguished from all other species of Gochteodinia by its characteristically long, slim processes, which are commonly distally trabeculate. It is most similar morphologically to Gochteodinia virgula Davey 1982. However, Gochteodinia virgula is more elongate longitudinally than Gochteodinia procera sp. nov. Furthermore, G. virgula consistently has an apical horn and has shorter processes, which are not distally trabeculate. The remaining validly described taxa, Gochteodinia antennata (Gitmez & Sarjeant 1972) Below 1990, G. judilentiniae Mclntyre & Brideaux 1980, G. mutabilis (Riley in Fisher & Riley 1980) Fisher & Riley 1982, G. verrucosa (Vozzhennikova 1967) Dörhöfer & Davies 1980 and G. villosa, all have relatively short, largely simple, elements of ornamentation.
Holotype. Figure 9L. Curated at NAM, Assen, The Netherlands.
Dimensions (μm).
Minimum Mean Maximum
Overall cyst length: 44 56 62
Overall cyst width: 33 41 53
Length of spines: 13 22 41
36 specimens measured.
Derivation of name. From the Latin procerus, meaning long or slender, referring to the relatively long processes of this species.
Stratigraphical and geographical distribution. Gochteodinia procera sp. nov. has been previously reported, as Gochteodinia sp. I, from the Volgian to early Ryazanian of the Haldager No. 1 Borehole, northern Denmark,by Davey (1982). In this study, Gochteodinia procera sp. nov. was recorded from the late Volgian (samples 10 to 33) of well L06-2.
Gochteodinia procera Riding in Abbink et al., 2001, p.300–301, figs.9L–O. Holotype: Abbink et al., 2001, fig.9L. Age: late Volgian.
---------------------------------------------------------------------------------------------------
Original description (Abbink et al., 2001):
Gochteodinia procera Riding sp. nov. (Figs 9L-0)
1982 Gochteodinia sp. I Davey, p. 24, pi. 6, figs. 14,15.
Diagnosis. A species of Gochteodinia, with a subspherical to ovoidal/elongate ovoidal ambitus in dorso-ventral view. The cyst is dorso-ventrally flattened. A small, distally rounded apical horn or protuberance may be developed; this feature, however, is commonly not developed. Antapical horns, protuberances etc. are consistently lacking. Autophragm relatively thick, microscabrate to scabrate, covered by about 40 to 50 long, sinuous, slender, solid processes. The processes are simple, capitate or furcate (normally bifurcate) with the branching rarely occurring up to the central part of the process. The distal parts of the processes are commonly connected by trabeculae; non-trabeculate processes are normally distally bifurcate or capitate. Lineations of processes may indicate the positions, and paratabulation, of the paracingulum and parasulcus. The archaeopyle is anterior intercalary, where two paraplates are displaced (type 21). The operculum is compound and the opercular pieces are free.
Remarks. Gochteodinia procera sp. nov. is distinguished from all other species of Gochteodinia by its characteristically long, slim processes, which are commonly distally trabeculate. It is most similar morphologically to Gochteodinia virgula Davey 1982. However, Gochteodinia virgula is more elongate longitudinally than Gochteodinia procera sp. nov. Furthermore, G. virgula consistently has an apical horn and has shorter processes, which are not distally trabeculate. The remaining validly described taxa, Gochteodinia antennata (Gitmez & Sarjeant 1972) Below 1990, G. judilentiniae Mclntyre & Brideaux 1980, G. mutabilis (Riley in Fisher & Riley 1980) Fisher & Riley 1982, G. verrucosa (Vozzhennikova 1967) Dörhöfer & Davies 1980 and G. villosa, all have relatively short, largely simple, elements of ornamentation.
Holotype. Figure 9L. Curated at NAM, Assen, The Netherlands.
Dimensions (μm).
Minimum Mean Maximum
Overall cyst length: 44 56 62
Overall cyst width: 33 41 53
Length of spines: 13 22 41
36 specimens measured.
Derivation of name. From the Latin procerus, meaning long or slender, referring to the relatively long processes of this species.
Stratigraphical and geographical distribution. Gochteodinia procera sp. nov. has been previously reported, as Gochteodinia sp. I, from the Volgian to early Ryazanian of the Haldager No. 1 Borehole, northern Denmark,by Davey (1982). In this study, Gochteodinia procera sp. nov. was recorded from the late Volgian (samples 10 to 33) of well L06-2.