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Homotryblium bifurcatum
From Fensome et al., 2019:
Homotryblium bifurcatum Caro, 1973, p.354,357, pl.2, fig.6. Holotype: Caro, 1973, pl.2, fig.6. Originally Homotryblium, subsequently (and now) Homotryblium?. Questionable assignment: Stover and Evitt (1978, p.210) as a problematic species. Age: Middle Paleocene.
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Original description: [Caro, 1973] (translated from French):
Homotryblium bifurcatum, sp. nov.
Pl. 2, fig. 6
Origin of name: Bifurcation (bifurcated appendages).
Diagnosis: Hemispherical to ovoid central body, with the endophragm and periphragm not separated. Relatively short appendages (1/4 of the central body diameter), all of the same size. Some appendages are bifurcated at the base. The archaeopyle is epitractal.
Holotype: Slide 615 (2), Campo Section (Pl. 2, fig. 6).
Dimensions: overall diameter of the holotype: 60 μ
overall diameter: 51 μ (60 μ) 69 μ
central body diameter: 40 μ
appendages: 10 μ long, 3 μ wide at the apex.
Distribution in the Campo section: Specimen SP-615 only, but in great abundance.
Description: The central body is ovoid to spherical, slightly granular. The appendages are enlarged at the base and apex. A slightly open corolla with curved edges terminates them distally. Some appendages, the rarest, are bifurcated at the base or in the lower third of their length. Some suture lines are faintly visible, suggesting that the appendages are grouped in groups of three or four on a plate (intratabular) and that the archaeopyle would be formed of the apical plates (1 to 3') and the precingulate plates (1" to 6"). On the rest of the body, it is difficult to number the plates.
Homotryblium bifurcatum Caro, 1973, p.354,357, pl.2, fig.6. Holotype: Caro, 1973, pl.2, fig.6. Originally Homotryblium, subsequently (and now) Homotryblium?. Questionable assignment: Stover and Evitt (1978, p.210) as a problematic species. Age: Middle Paleocene.
---------------------------------------------------------------------------------------------------
Original description: [Caro, 1973] (translated from French):
Homotryblium bifurcatum, sp. nov.
Pl. 2, fig. 6
Origin of name: Bifurcation (bifurcated appendages).
Diagnosis: Hemispherical to ovoid central body, with the endophragm and periphragm not separated. Relatively short appendages (1/4 of the central body diameter), all of the same size. Some appendages are bifurcated at the base. The archaeopyle is epitractal.
Holotype: Slide 615 (2), Campo Section (Pl. 2, fig. 6).
Dimensions: overall diameter of the holotype: 60 μ
overall diameter: 51 μ (60 μ) 69 μ
central body diameter: 40 μ
appendages: 10 μ long, 3 μ wide at the apex.
Distribution in the Campo section: Specimen SP-615 only, but in great abundance.
Description: The central body is ovoid to spherical, slightly granular. The appendages are enlarged at the base and apex. A slightly open corolla with curved edges terminates them distally. Some appendages, the rarest, are bifurcated at the base or in the lower third of their length. Some suture lines are faintly visible, suggesting that the appendages are grouped in groups of three or four on a plate (intratabular) and that the archaeopyle would be formed of the apical plates (1 to 3') and the precingulate plates (1" to 6"). On the rest of the body, it is difficult to number the plates.