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Prolixosphaeridium basifurcatum
From Fensome et al., 2019:
Prolixosphaeridium basifurcatum Dodekova, 1969, p.21–22, pl.5, figs.1–6; text-fig.G. Holotype: Dodekova, 1969, pl.5, figs.1–2,4. Taxonomic senior synonym: Baltisphaeridium (now Prolixosphaeridium) mixtispinosum, according to Courtinat (1989, p.182) — however, Fauconnier and Monteil in Fauconnier and Masure (2004, p.461) retained Prolixosphaeridium basifurcatum. Age: Tithonian.
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Orginal description (Dodekova, 1969) Not yet translated from French.
Type. Jmp/DO - 25, Tithonian, Dolen Dabnik village, borehole R1 - 2560 m. Named for the spines with branched bases that cover the body. In Latin: "basis" - base, "furca" - fork.
Material. More than 200 specimens.
Dimensions (in µm) Holotype.
Body length (excluding appendages) 52
Body width (excluding appendages) 27
Appendage length 15
Description: Cylindrical body, rounded at one end and open at the opposite end. Covered with numerous intricately constructed appendages. They are strongly branched at the base, appearing to be formed by small spines. Distally, all the appendages are closed, pointed, and unbranched. They are most often straight or slightly flexed. Observation of numerous individuals has allowed researchers to trace the varying degrees of branching at the base of the appendages. In some forms, the branching of the appendages presents two branches, while in others it can be triple or quadruple. The extent of branching, whether it covers 1/3 to 2/3 of the appendage, is not documented in the literature. Among the appendages are small spines, warts, or granules. One end of the body is open via the archeopyle. The membrane is pale yellow.
Remarks. Since the described species encompasses very different forms in terms of density, length, and degree of branching of the appendages, it is possible that new species may be distinguished in the future.
Relationship and differences. P. basifurcatum resembles P. mixtispinosum Klement, in that it possesses two varieties of appendages, but the branching of the bases is the characteristic feature of the new species and distinguishes it from all other members of the genus.
Prolixosphaeridium basifurcatum Dodekova, 1969, p.21–22, pl.5, figs.1–6; text-fig.G. Holotype: Dodekova, 1969, pl.5, figs.1–2,4. Taxonomic senior synonym: Baltisphaeridium (now Prolixosphaeridium) mixtispinosum, according to Courtinat (1989, p.182) — however, Fauconnier and Monteil in Fauconnier and Masure (2004, p.461) retained Prolixosphaeridium basifurcatum. Age: Tithonian.
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Orginal description (Dodekova, 1969) Not yet translated from French.
Type. Jmp/DO - 25, Tithonian, Dolen Dabnik village, borehole R1 - 2560 m. Named for the spines with branched bases that cover the body. In Latin: "basis" - base, "furca" - fork.
Material. More than 200 specimens.
Dimensions (in µm) Holotype.
Body length (excluding appendages) 52
Body width (excluding appendages) 27
Appendage length 15
Description: Cylindrical body, rounded at one end and open at the opposite end. Covered with numerous intricately constructed appendages. They are strongly branched at the base, appearing to be formed by small spines. Distally, all the appendages are closed, pointed, and unbranched. They are most often straight or slightly flexed. Observation of numerous individuals has allowed researchers to trace the varying degrees of branching at the base of the appendages. In some forms, the branching of the appendages presents two branches, while in others it can be triple or quadruple. The extent of branching, whether it covers 1/3 to 2/3 of the appendage, is not documented in the literature. Among the appendages are small spines, warts, or granules. One end of the body is open via the archeopyle. The membrane is pale yellow.
Remarks. Since the described species encompasses very different forms in terms of density, length, and degree of branching of the appendages, it is possible that new species may be distinguished in the future.
Relationship and differences. P. basifurcatum resembles P. mixtispinosum Klement, in that it possesses two varieties of appendages, but the branching of the bases is the characteristic feature of the new species and distinguishes it from all other members of the genus.