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Neoeurysphaeridium glabrum
From Fensome et al., 2019:
Neoeuryshaeridium glabrum Slimani, 1994, p.78–80, pl.13, figs.1–6; text-figs.12A–B. Holotype: Slimani, 1994, pl.13, figs.1–4; textfigs.
12A–B. Taxonomic junior synonym: Eurysphaeridium glabrum (name not validly published), according to Slimani (2001a, p.193). Age: late Campanian–early Maastrichtian.
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Original description (Slimani, 1994) Not yet translated from French.
Name derivation: Latin: glaher, smooth; refers to the smooth surface of the periphragm and processes.
Locality: Beutenaken, sample 12, preparation 2, E.F. coord. V51/3.
Locality: Turnhout -933 m, preparation 7, E.F. coord. V35/1.
Type locality: Beutenaken, sample 12.
Type horizon: Lower Maastrichtian
Synonymy: 1971: Hystrichokolpoma sequanaportus DEFLANDR E and DEFLANDRE-RIGAUO, 1958 - WILSON, pl. 4, fig. 7. 1974: Eurysphaeridium glabrum in WILSON, pp. 384-385, pl. 18, fig. 1-4, text-fig. 55.
Diagnosis: Cyst, gonyaulacoid skolochorate with a subspheroidal to ellipsoidal central body. It bears intratabular precingulate and postcingulate processes (one per plate) which are prominent, 1/2 to 3/4 of the diameter of the central body, smooth, hollow, broad and bulbous. It also has small, short (1/4 to 1/3 of the diameter of the central body) very thin, simple intratabular processes, one per paraplate in the apical and antapical region and usually two per plate in the paracingulate and parasulcal region. The paratabulation is as follows: 4', 5", 6c, 4 - 5'", lp, 3 - 5s, lp. A long distinct apical protrusion allows orientation of the cyst. The archaeopyle is precingulate of type P(3") with a free operculum.
Dimensions:
Holotype. Central body, length: 46 µm, width: 40 µm.
Large processes, length: 20-28 µm, width: 20-34 µm.
Small processes, length: 18-20 µm, width: 2 µm.
Variations: Central body, length: 44-50 µm, width: 38-47 µm.
Large processes, length: 20-40 µm, width: 11-28 µm.
Small processes, length: 10-24 µm, width: 1-2 µm.
Apical horn, length: 6-12 µm, width: 3-1 µm.
Number of specimens measured: 10.
Material: 15 specimens.
Description: The smooth, thick endophragm, about 1 µm thick, and the thinner, smooth or slightly chafed periphragm are in close contact between the processes. The periphragm gives rise to two types of intratabular processes. The precingulate and postcingulate processes are broad, straight, and distally closed or communicate with the exterior by means of a foramen 3 to 6 µm in diameter; the margins of their distal ends bear numerous small spines. The apical, paracingulate, sulcal, and antapical processes are often thin, solid, or hollow, straight, flexuous, or recurved, and terminate distally in an acuminate, truncate, or slightly flared tip. The antapical and some precingulate and postcingulate processes may be less broad to very thin, solid, or hollow. The apical horn consists of a long, hollow, rounded protrusion of the autophragm.
Comparison: This species is very closely comparable to specimens of Hystrichokolpoma sequanaportus in Wilson (1971) and to Eurysphaeridium glabrum in Wilson's (1974) unpublished PhD work.
Stratigraphic distribution:
Beutenaken: scales 12 to 20, Halembaye: scale 27; Upper Campanian - Lower Maastrichtian (B. minor Zone - B. lanceolata Zone). Turnhout: -933 to -931.5 m, Upper Campanian - Lower Maastrichtian. In Wilson (1974), Upper Campanian (langei Zone), Denmark; Lower Maastrichtian (lanceolata Zone), Maastricht region.
Neoeuryshaeridium glabrum Slimani, 1994, p.78–80, pl.13, figs.1–6; text-figs.12A–B. Holotype: Slimani, 1994, pl.13, figs.1–4; textfigs.
12A–B. Taxonomic junior synonym: Eurysphaeridium glabrum (name not validly published), according to Slimani (2001a, p.193). Age: late Campanian–early Maastrichtian.
---------------------------------------------------------------------------------------------------
Original description (Slimani, 1994) Not yet translated from French.
Name derivation: Latin: glaher, smooth; refers to the smooth surface of the periphragm and processes.
Locality: Beutenaken, sample 12, preparation 2, E.F. coord. V51/3.
Locality: Turnhout -933 m, preparation 7, E.F. coord. V35/1.
Type locality: Beutenaken, sample 12.
Type horizon: Lower Maastrichtian
Synonymy: 1971: Hystrichokolpoma sequanaportus DEFLANDR E and DEFLANDRE-RIGAUO, 1958 - WILSON, pl. 4, fig. 7. 1974: Eurysphaeridium glabrum in WILSON, pp. 384-385, pl. 18, fig. 1-4, text-fig. 55.
Diagnosis: Cyst, gonyaulacoid skolochorate with a subspheroidal to ellipsoidal central body. It bears intratabular precingulate and postcingulate processes (one per plate) which are prominent, 1/2 to 3/4 of the diameter of the central body, smooth, hollow, broad and bulbous. It also has small, short (1/4 to 1/3 of the diameter of the central body) very thin, simple intratabular processes, one per paraplate in the apical and antapical region and usually two per plate in the paracingulate and parasulcal region. The paratabulation is as follows: 4', 5", 6c, 4 - 5'", lp, 3 - 5s, lp. A long distinct apical protrusion allows orientation of the cyst. The archaeopyle is precingulate of type P(3") with a free operculum.
Dimensions:
Holotype. Central body, length: 46 µm, width: 40 µm.
Large processes, length: 20-28 µm, width: 20-34 µm.
Small processes, length: 18-20 µm, width: 2 µm.
Variations: Central body, length: 44-50 µm, width: 38-47 µm.
Large processes, length: 20-40 µm, width: 11-28 µm.
Small processes, length: 10-24 µm, width: 1-2 µm.
Apical horn, length: 6-12 µm, width: 3-1 µm.
Number of specimens measured: 10.
Material: 15 specimens.
Description: The smooth, thick endophragm, about 1 µm thick, and the thinner, smooth or slightly chafed periphragm are in close contact between the processes. The periphragm gives rise to two types of intratabular processes. The precingulate and postcingulate processes are broad, straight, and distally closed or communicate with the exterior by means of a foramen 3 to 6 µm in diameter; the margins of their distal ends bear numerous small spines. The apical, paracingulate, sulcal, and antapical processes are often thin, solid, or hollow, straight, flexuous, or recurved, and terminate distally in an acuminate, truncate, or slightly flared tip. The antapical and some precingulate and postcingulate processes may be less broad to very thin, solid, or hollow. The apical horn consists of a long, hollow, rounded protrusion of the autophragm.
Comparison: This species is very closely comparable to specimens of Hystrichokolpoma sequanaportus in Wilson (1971) and to Eurysphaeridium glabrum in Wilson's (1974) unpublished PhD work.
Stratigraphic distribution:
Beutenaken: scales 12 to 20, Halembaye: scale 27; Upper Campanian - Lower Maastrichtian (B. minor Zone - B. lanceolata Zone). Turnhout: -933 to -931.5 m, Upper Campanian - Lower Maastrichtian. In Wilson (1974), Upper Campanian (langei Zone), Denmark; Lower Maastrichtian (lanceolata Zone), Maastricht region.