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Lanterna bulgarica
From Fensome et al., 2019:
Lanterna bulgarica Dodekova, 1969, p.16โ17, pl.2, figs.3โ6; pl.3, fig.1; text-figs.B,Db. Holotype: Dodekova, 1969, pl.2, figs.4โ6. Age: Tithonian.
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Original description (Dodekova, 1969) Translation PKB 2025
Material: 68 specimens
Dimensions (in ยต):
Body length. Holotype: 73, Paratype: 66
Body width. Holotype: 73, Paratype: 66
Appendage length. Holotype: 6, Paratype: 4-5
Description. Body spherical, ellipsoidal to polyhedral, with a preferably hexagonal projection, slightly flattened dorsoventrally. Divided by the left-hand transverse groove into two unequal halves. The distance between the two ends of the groove is greater than its width. The longitudinal groove is distinct, unornamented, and short. The tabular pattern of the species is 4'?, 6", 6 s.t., 6"', 1p, 1ppl, 1"", of which the 6", 1"', 2"', 1 p and 1 ppl are relatively smaller.
The characteristic feature of the species is the ornamentation of the membrane and, in connection with this, the sutures between the plates. The surface of the membrane is covered with numerous appendages, which, by their arrangement, form the plates. At the base, they are enlarged, merging with neighboring appendages, warts, or spines. Above, they thin out and widen again at the distal end, where they approach or unite with the enlargements of nearby ornaments. The process of fusion of the appendages most often occurs at the plate boundaries.
The sutures represent free, unornamented bands with appendages, only slightly punctuated or granulated. The transverse groove is formed by a row of merged appendages, divided into six parts and surrounded on both sides by unornamented fields.
The apical archaeopyle is formed by the rejection of the apical plates. All established individuals have an archaeopyle. The membrane is dark yellow in color.
Lanterna bulgarica Dodekova, 1969, p.16โ17, pl.2, figs.3โ6; pl.3, fig.1; text-figs.B,Db. Holotype: Dodekova, 1969, pl.2, figs.4โ6. Age: Tithonian.
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Original description (Dodekova, 1969) Translation PKB 2025
Material: 68 specimens
Dimensions (in ยต):
Body length. Holotype: 73, Paratype: 66
Body width. Holotype: 73, Paratype: 66
Appendage length. Holotype: 6, Paratype: 4-5
Description. Body spherical, ellipsoidal to polyhedral, with a preferably hexagonal projection, slightly flattened dorsoventrally. Divided by the left-hand transverse groove into two unequal halves. The distance between the two ends of the groove is greater than its width. The longitudinal groove is distinct, unornamented, and short. The tabular pattern of the species is 4'?, 6", 6 s.t., 6"', 1p, 1ppl, 1"", of which the 6", 1"', 2"', 1 p and 1 ppl are relatively smaller.
The characteristic feature of the species is the ornamentation of the membrane and, in connection with this, the sutures between the plates. The surface of the membrane is covered with numerous appendages, which, by their arrangement, form the plates. At the base, they are enlarged, merging with neighboring appendages, warts, or spines. Above, they thin out and widen again at the distal end, where they approach or unite with the enlargements of nearby ornaments. The process of fusion of the appendages most often occurs at the plate boundaries.
The sutures represent free, unornamented bands with appendages, only slightly punctuated or granulated. The transverse groove is formed by a row of merged appendages, divided into six parts and surrounded on both sides by unornamented fields.
The apical archaeopyle is formed by the rejection of the apical plates. All established individuals have an archaeopyle. The membrane is dark yellow in color.