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Exochosphaeridium bahiaensis
Material. Specimen from well 1-BAS-143, ditch cutting sample 366 m, Camamu Basin (Figure 6H).
Original description (in Portuguese and direct translation).
cápsula central esférica, 60 a 70 μm de diâmetro, com retículo fino; processos radiais numerosos, com 20 a 30 μm de comprimento, finos, lisos e bifurcados nas extremidades [central body spherical, 60–70 μm-diameter, finely reticulated; numerous radial processes, with 20–30 μm-length, thin, smooth, and bifurcated at the end].
Reference specimen. Figure 6H (well 1-BAS-143, ditch cutting sample 366 m, England Finder J10/2, Camamu Basin).
Emended description. cyst skolochorate; micro-reticulate spherical body with numerous nontabular processes that are solid and fibrous at their bases; distal end of process branched (bifurcate); archeopyle precingular, type [P], operculum free.
Comparison. Exochosphaeridium bahiaense (Regali, Uesugui & Santos, 1974) comb. nov. differs from Exochosphaeridium giganteum (Caro, 1973) Hochuli & Masure in Fauconnier & Masure, 2004 in having smaller size and processes that branch at the end rather than their middle part.
Dimensions. Holotype: total diameter = 100 μm, including processes; central body = 60–70 μm; process length = 20–30 μm (Regali et al., 1974b, p. 290). Reference specimen (Figure 6H): central body diameter = 61 × 64 μm; total diameter including processes = 91 × 96 μm; process length = 16 to 24 μm. New lectotype: Figure 6H.
Remarks. the species was allocated to the genus Exochosphaeridium because it has fibrous processes at the base. Regali et al. (1974b) did not describe this detail, but this characteristic was observed by the first author (M. Arai) in the holotype in the 1980s, when the material was still available. Furthermore, in the sketch by Regali et al. (1973), the fibrosity at the base of the processes is clear (Figure 6I).
Original description (in Portuguese and direct translation).
cápsula central esférica, 60 a 70 μm de diâmetro, com retículo fino; processos radiais numerosos, com 20 a 30 μm de comprimento, finos, lisos e bifurcados nas extremidades [central body spherical, 60–70 μm-diameter, finely reticulated; numerous radial processes, with 20–30 μm-length, thin, smooth, and bifurcated at the end].
Reference specimen. Figure 6H (well 1-BAS-143, ditch cutting sample 366 m, England Finder J10/2, Camamu Basin).
Emended description. cyst skolochorate; micro-reticulate spherical body with numerous nontabular processes that are solid and fibrous at their bases; distal end of process branched (bifurcate); archeopyle precingular, type [P], operculum free.
Comparison. Exochosphaeridium bahiaense (Regali, Uesugui & Santos, 1974) comb. nov. differs from Exochosphaeridium giganteum (Caro, 1973) Hochuli & Masure in Fauconnier & Masure, 2004 in having smaller size and processes that branch at the end rather than their middle part.
Dimensions. Holotype: total diameter = 100 μm, including processes; central body = 60–70 μm; process length = 20–30 μm (Regali et al., 1974b, p. 290). Reference specimen (Figure 6H): central body diameter = 61 × 64 μm; total diameter including processes = 91 × 96 μm; process length = 16 to 24 μm. New lectotype: Figure 6H.
Remarks. the species was allocated to the genus Exochosphaeridium because it has fibrous processes at the base. Regali et al. (1974b) did not describe this detail, but this characteristic was observed by the first author (M. Arai) in the holotype in the 1980s, when the material was still available. Furthermore, in the sketch by Regali et al. (1973), the fibrosity at the base of the processes is clear (Figure 6I).