Back
Cauca velata
Cauca? velata, (W. Wetzel, 1952); Emend. Sarjeant, 1984
Originally Hystrichosphaeridium oligacanthum subsp. velatum, subsequently Baltisphaeridium oligacanthum subsp. velatum, thirdly Cleistosphaeridium? oligacanthum subsp. velatum, fourthly (and now) Cauca? velata.
At the time of the transfer, Sarjeant, 1984, emended the diagnosis and raised the taxon to the species level, and questionably included this taxon in Cauca.
Holotype: W. Wetzel, 1952, pl.A, fig.7, text-fig.24; Sarjeant, 1984, pl.3, figs.4-6
Locus typicus: Kiel district, Germany
Stratum typicum: Danian flint from North German drift (Jungdiluvium)
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Original diagnosis as Hystrichodinium oligocanthum ssp. velatum: [W. Wetzel, 1952, p. 403-404]: (Translation: Sarjeant, 1984):
Diagnosis:
In one specimen from Danian flint "C" otherwise in agreement with the typical forms, it is noticeable that, between each of the processes lying in the same plane, a very delicate membrane is extending, which has not been embedded [in the flint] without damage. The curving of the processes obviously is caused in this case by the formation of the veil and not first developed postmortally, as otherwise might be supposed.
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Emended description:
Sarjeant, 1984, p. 133-134:
Diagnosis:
Proximochorate, holotabulate cyst, spheroidal to broadly ovoidal. The cingular paraplates each give rise to a single, curving process, acuminate, evexate or bifid distally. Hypotractal paraplates marked by low ridges, with tiny spinelets at paraplate nodes; paratabulation gonyaulacacean (6c, 6""", 1p, 1pv, 1""""). Epitractal structure unknown.
Phragma two-layered, moderately thick, its surface minutely and irregularly granular or punctate. Isolated verrucae dot some of the paraplates.
Archaeopyle epitractal (type tAtP).
Dimensions:
Holotype (in polar view): equatorial diameter 60 µm, length of processes c. 15 µm.
Originally Hystrichosphaeridium oligacanthum subsp. velatum, subsequently Baltisphaeridium oligacanthum subsp. velatum, thirdly Cleistosphaeridium? oligacanthum subsp. velatum, fourthly (and now) Cauca? velata.
At the time of the transfer, Sarjeant, 1984, emended the diagnosis and raised the taxon to the species level, and questionably included this taxon in Cauca.
Holotype: W. Wetzel, 1952, pl.A, fig.7, text-fig.24; Sarjeant, 1984, pl.3, figs.4-6
Locus typicus: Kiel district, Germany
Stratum typicum: Danian flint from North German drift (Jungdiluvium)
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Original diagnosis as Hystrichodinium oligocanthum ssp. velatum: [W. Wetzel, 1952, p. 403-404]: (Translation: Sarjeant, 1984):
Diagnosis:
In one specimen from Danian flint "C" otherwise in agreement with the typical forms, it is noticeable that, between each of the processes lying in the same plane, a very delicate membrane is extending, which has not been embedded [in the flint] without damage. The curving of the processes obviously is caused in this case by the formation of the veil and not first developed postmortally, as otherwise might be supposed.
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Emended description:
Sarjeant, 1984, p. 133-134:
Diagnosis:
Proximochorate, holotabulate cyst, spheroidal to broadly ovoidal. The cingular paraplates each give rise to a single, curving process, acuminate, evexate or bifid distally. Hypotractal paraplates marked by low ridges, with tiny spinelets at paraplate nodes; paratabulation gonyaulacacean (6c, 6""", 1p, 1pv, 1""""). Epitractal structure unknown.
Phragma two-layered, moderately thick, its surface minutely and irregularly granular or punctate. Isolated verrucae dot some of the paraplates.
Archaeopyle epitractal (type tAtP).
Dimensions:
Holotype (in polar view): equatorial diameter 60 µm, length of processes c. 15 µm.