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Mendicodinium microreticulatum
Mendicodinium microreticulatum Kumar, 1986
Holotype: Kumar, 1986, pl.5, fig.5
Locus typicus: Kachchh, India
Stratum typicum: Kimmeridgian-Tithonian
Original diagnosis: Kumar, 1986, p.395
Proximate, subsphaerical, biconical cysts with rounded poles. No paratabulation features are evident except for the presence of an epicystal archaeopyle. Wall single or double layered, if double layered both are in close contact. Microreticulate sculpture developed either on autophragm or on endophragm.
Original description: Kumar, 1986, p.395-396
These are proximate, biconical to subsphaerical cysts with flattened or rounded poles. They are devoid of any paratabulation features, except for the presence of an epicystal archaeopyle. The epicyst and hypocyst are connected as the opening is never complete. The archaeopyle opening may be present only on one side or on both sides. Generally the archaeopyle divides the cyst into two almost equal halves. In such cases it is not possible to determine which half is the epicyst or the hypocyst. The wall may be single- or double-layered. If double-layered, the periphragm is thin and psilate and the endophragm shows microreticulate ornamentation; both are in close contact. If it is a single-walled cyst, the microreticulate ornamentation is developed on the autophragm. The lumina of the reticulation are very small and the muri are thin.
Dimension: Based on eight specimens. Maximum diameter of cyst = 80--90 Ám.
Affinities:
Kumar, 1986, p.396: M. microreticulatum differs from M. reticulatum Morgenroth (1970) in being single or double-walled rather than being only single walled, having microreticulate sculpture rather than coarsely reticulate sculpture, and in being much larger in size.
Holotype: Kumar, 1986, pl.5, fig.5
Locus typicus: Kachchh, India
Stratum typicum: Kimmeridgian-Tithonian
Original diagnosis: Kumar, 1986, p.395
Proximate, subsphaerical, biconical cysts with rounded poles. No paratabulation features are evident except for the presence of an epicystal archaeopyle. Wall single or double layered, if double layered both are in close contact. Microreticulate sculpture developed either on autophragm or on endophragm.
Original description: Kumar, 1986, p.395-396
These are proximate, biconical to subsphaerical cysts with flattened or rounded poles. They are devoid of any paratabulation features, except for the presence of an epicystal archaeopyle. The epicyst and hypocyst are connected as the opening is never complete. The archaeopyle opening may be present only on one side or on both sides. Generally the archaeopyle divides the cyst into two almost equal halves. In such cases it is not possible to determine which half is the epicyst or the hypocyst. The wall may be single- or double-layered. If double-layered, the periphragm is thin and psilate and the endophragm shows microreticulate ornamentation; both are in close contact. If it is a single-walled cyst, the microreticulate ornamentation is developed on the autophragm. The lumina of the reticulation are very small and the muri are thin.
Dimension: Based on eight specimens. Maximum diameter of cyst = 80--90 Ám.
Affinities:
Kumar, 1986, p.396: M. microreticulatum differs from M. reticulatum Morgenroth (1970) in being single or double-walled rather than being only single walled, having microreticulate sculpture rather than coarsely reticulate sculpture, and in being much larger in size.