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Hystrichosphaera mirabilis
Hystrichosphaera mirabilis Rossignol, 1964
Now Spiniferites. Originally Hystrichosphaera, subsequently (and now) Spiniferites.
Hystrichosphaera mirabilis was described but not figured by Rossignol, 1962, and figured with description or reference to the holotype by Rossignol, 1963. Therefore the name was not validly published until 1964 when all requirements of the I.C.B.N. were met.
The new combination Spiniferites mirabilis made by Sarjeant, 1970, is valid even though the citation for the species is incorrect because according to the I.C.B.N. Article 33.2 a new combination cannot be invalidated due to a bibliographic error.
This is a cyst equivalent of Gonyaulax spinifera (Claparede and Lachmann, 1859) Diesing, 1866,
Holotype: Rossignol, 1964, pl.2, figs.1-2
Age: Pleistocene and Recent
Locus typicus: Ashdod Yam, Israel
Translation Rossignol 1964: LPP
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Rossignol 1964, p.86-87, pl. 2, fig.1-3, pl.3, fig.4-5
Diagnosis: Large ovoid Hystrichosphaera with weakly apparent tabulation. Processes trifurcate at the junctions of three plates, and intercalary processes bifurcate along the sutures, each branch finely bifurcate. At the antapical pole, the processes of the antapical plate lose themselves in a large joint veil just up to their bi- or trifurcations; the whole looks like a fan.
Description: The wall is thin, double-walled. The plate "sutures" are weakly visible due to a large number of processes that rise there. At the antapical pole, there where in Hystrichosphaera furcata the two large dorsal processes rise, the series of 5-7 processes located on the on the dorsal and lateral faces of the antapical plate is lost into a joint veil which inflates just upto the furrow; like the processes themselves, it consists of the outer test layer, detached from the inner layer; seen frontally, they form a sort of fan; in profile, their mutual base looks like the lined-up fingers of a glove; in antapial view, this fan forms a horse-shoe openen on the ventral side of the hystrichosphere.
The dorsal precingular archaeopyle is triangular.
The multiplication of the processes is like that in Hystrichosphaera hyperacantha Deflandre and Cookson 1955; however, the antapical aspect of the Australian specimens, immobilized in glycerine jelly, has not been precisely dscribed by the authors: if the pole shows the large specific veil, this species should be close to ours, and if not, to Hystrichosphaera furcata var. multiplicata, of which the antaical pole is indicated by the two large dorsal processes.
Dimensions: test 52 x 44 µm (70-40 x 60-35 µm); processes 15-22 µm.
Several stages of development have been observed. Fairly frequent species in the Pleistocene and especially Recent, generally associated with Hystrichosphaera furcata, Hystrichosphaera bentori and Baltisphaeridium machaerophorum; over 100 specimens.
Now Spiniferites. Originally Hystrichosphaera, subsequently (and now) Spiniferites.
Hystrichosphaera mirabilis was described but not figured by Rossignol, 1962, and figured with description or reference to the holotype by Rossignol, 1963. Therefore the name was not validly published until 1964 when all requirements of the I.C.B.N. were met.
The new combination Spiniferites mirabilis made by Sarjeant, 1970, is valid even though the citation for the species is incorrect because according to the I.C.B.N. Article 33.2 a new combination cannot be invalidated due to a bibliographic error.
This is a cyst equivalent of Gonyaulax spinifera (Claparede and Lachmann, 1859) Diesing, 1866,
Holotype: Rossignol, 1964, pl.2, figs.1-2
Age: Pleistocene and Recent
Locus typicus: Ashdod Yam, Israel
Translation Rossignol 1964: LPP
--------------------------------------------------------------------------------------------------------------------------------------------------
Rossignol 1964, p.86-87, pl. 2, fig.1-3, pl.3, fig.4-5
Diagnosis: Large ovoid Hystrichosphaera with weakly apparent tabulation. Processes trifurcate at the junctions of three plates, and intercalary processes bifurcate along the sutures, each branch finely bifurcate. At the antapical pole, the processes of the antapical plate lose themselves in a large joint veil just up to their bi- or trifurcations; the whole looks like a fan.
Description: The wall is thin, double-walled. The plate "sutures" are weakly visible due to a large number of processes that rise there. At the antapical pole, there where in Hystrichosphaera furcata the two large dorsal processes rise, the series of 5-7 processes located on the on the dorsal and lateral faces of the antapical plate is lost into a joint veil which inflates just upto the furrow; like the processes themselves, it consists of the outer test layer, detached from the inner layer; seen frontally, they form a sort of fan; in profile, their mutual base looks like the lined-up fingers of a glove; in antapial view, this fan forms a horse-shoe openen on the ventral side of the hystrichosphere.
The dorsal precingular archaeopyle is triangular.
The multiplication of the processes is like that in Hystrichosphaera hyperacantha Deflandre and Cookson 1955; however, the antapical aspect of the Australian specimens, immobilized in glycerine jelly, has not been precisely dscribed by the authors: if the pole shows the large specific veil, this species should be close to ours, and if not, to Hystrichosphaera furcata var. multiplicata, of which the antaical pole is indicated by the two large dorsal processes.
Dimensions: test 52 x 44 µm (70-40 x 60-35 µm); processes 15-22 µm.
Several stages of development have been observed. Fairly frequent species in the Pleistocene and especially Recent, generally associated with Hystrichosphaera furcata, Hystrichosphaera bentori and Baltisphaeridium machaerophorum; over 100 specimens.