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Evansia reticulopilosa
Evansia reticulopilosa (Dodekova, 1975) Jansonius, 1986
Originally Glomodinium, subsequently Pareodinia, thirdly (and now) Evansia.
Holotype: Dodekova, 1975, pl.5, figs.1-2
Locus typicus: NE Bulgaria
Stratum typicum: Late Bathonian
Original description: Dodekova, 1975, p.27: Glomodinium reticulopilosum
Spheroidal cyst with small apical horn. The periphragm is relatively thick and forms the horn and the ornamentation. lhe endophragm is thin and may be well observed at the base of the apical horn (Pl. V, fig. 2). In the remaining part of the body the two layers are in close contact and are difficult to distinguish. Traces of furrows and tabulation are not established. The ornamentation of the periphragm is a complicated combination of septa and hair-like processes. The septa form a very fine reticulum.The net-meshesare irregularly rounded or polygonal with diameter from 1.55 to 2.30 Ám. Regularity in the arrangement of the meshes were not established. The length of the septa is not constant and varies from 1.0 to 3.10 Ám. From the distal end of the septa thin hair-like processes protrude, which like hair envelope the spheroidal body.The described structural elements are very fine, transparent and may be observed by more than 1000 magnification. By small magnification thev are seen as a halo around the body. Amongst the hair-like processes small particles of organic matter are embedded, and the-mentioned halo resembles the "cloak" described by Sarjeant (1961, 1965) by the genera Netrelytron and Paranetrelytron. In the endocoel of the unbroken cysts one (or several smaller) irregularily rounded body (6 Ám) is observed. The archaeopyle is intercalary, composed of 3 plates, the central one being larger, while the peripheral are of identical dimensions (Pl. V, fig.1).
Originally Glomodinium, subsequently Pareodinia, thirdly (and now) Evansia.
Holotype: Dodekova, 1975, pl.5, figs.1-2
Locus typicus: NE Bulgaria
Stratum typicum: Late Bathonian
Original description: Dodekova, 1975, p.27: Glomodinium reticulopilosum
Spheroidal cyst with small apical horn. The periphragm is relatively thick and forms the horn and the ornamentation. lhe endophragm is thin and may be well observed at the base of the apical horn (Pl. V, fig. 2). In the remaining part of the body the two layers are in close contact and are difficult to distinguish. Traces of furrows and tabulation are not established. The ornamentation of the periphragm is a complicated combination of septa and hair-like processes. The septa form a very fine reticulum.The net-meshesare irregularly rounded or polygonal with diameter from 1.55 to 2.30 Ám. Regularity in the arrangement of the meshes were not established. The length of the septa is not constant and varies from 1.0 to 3.10 Ám. From the distal end of the septa thin hair-like processes protrude, which like hair envelope the spheroidal body.The described structural elements are very fine, transparent and may be observed by more than 1000 magnification. By small magnification thev are seen as a halo around the body. Amongst the hair-like processes small particles of organic matter are embedded, and the-mentioned halo resembles the "cloak" described by Sarjeant (1961, 1965) by the genera Netrelytron and Paranetrelytron. In the endocoel of the unbroken cysts one (or several smaller) irregularily rounded body (6 Ám) is observed. The archaeopyle is intercalary, composed of 3 plates, the central one being larger, while the peripheral are of identical dimensions (Pl. V, fig.1).