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Gonyaulacysta aculeata
Gonyaulacysta aculeata (Klement, 1960, p.42, pl.5, figs.6–9; text-fig.21) Sarjeant, 1969, p.8.
Now Tehamadinium. Originally Gonyaulax, subsequently Gonyaulacysta, thirdly Acanthaulax, fourthly Occisucysta, fifthly (and now) Tehamadinium.
This combination was not validly published in Sarjeant, 1966, since that author did not fully reference the basionym.
Holotype: Klement, 1960, pl.5, figs.6-7
Locus typicus: Scherstetten, Germany
Stratum typicum: Early Kimmeridgian
Original diagnosis: Klement, 1960, p.42: Gonyaualx aculeata
Supplemental description: Gitmez, 1970, p.249
Specimens of G. aculeata from the base of Kimmeridgian possess an ovate shell, with the tabulation: 4", 6"", 6c, 6""", 1p and 1"""". The epitract and hypotract are more or less equal in size and separated by the laevorotatory cingulum. The sulcus is broader on the hypotract. Longer spines, which are longer than the sutural spines, occupy the apex; one of them is particularly prominent and forms the so-called " apical protuberance " mentioned by Klement. The sutures are marked by rows of spines. The spines are mostly simple and acuminate, but they become complicated near the apex and the antapex. The surface of the shell is coarsely tuberculate. A precingular archaeopyle is formed by loss of plate 3"".
Dimesions: Figured specimen: overall length 68 µm, breadth 50 µm; apical processes 6 µm long; length of the spines on the sutures 3-5 µm. Range of the other specimens: English specimen (1 specimen measured): length 63 µm, breadth 55 µm; spine length 3 µm. French specimens (3 specimens measured): length 68-74 µm, breadth 63-65 µm; length of apical processes 5 µm; length of the spines 3-4 µm. Range of German specimens, as quoted by Klement: length 66-72 µm, breadth 61-63 µm; length of the apical processes 6 µm, sutural spines length 4 µm.
Now Tehamadinium. Originally Gonyaulax, subsequently Gonyaulacysta, thirdly Acanthaulax, fourthly Occisucysta, fifthly (and now) Tehamadinium.
This combination was not validly published in Sarjeant, 1966, since that author did not fully reference the basionym.
Holotype: Klement, 1960, pl.5, figs.6-7
Locus typicus: Scherstetten, Germany
Stratum typicum: Early Kimmeridgian
Original diagnosis: Klement, 1960, p.42: Gonyaualx aculeata
Supplemental description: Gitmez, 1970, p.249
Specimens of G. aculeata from the base of Kimmeridgian possess an ovate shell, with the tabulation: 4", 6"", 6c, 6""", 1p and 1"""". The epitract and hypotract are more or less equal in size and separated by the laevorotatory cingulum. The sulcus is broader on the hypotract. Longer spines, which are longer than the sutural spines, occupy the apex; one of them is particularly prominent and forms the so-called " apical protuberance " mentioned by Klement. The sutures are marked by rows of spines. The spines are mostly simple and acuminate, but they become complicated near the apex and the antapex. The surface of the shell is coarsely tuberculate. A precingular archaeopyle is formed by loss of plate 3"".
Dimesions: Figured specimen: overall length 68 µm, breadth 50 µm; apical processes 6 µm long; length of the spines on the sutures 3-5 µm. Range of the other specimens: English specimen (1 specimen measured): length 63 µm, breadth 55 µm; spine length 3 µm. French specimens (3 specimens measured): length 68-74 µm, breadth 63-65 µm; length of apical processes 5 µm; length of the spines 3-4 µm. Range of German specimens, as quoted by Klement: length 66-72 µm, breadth 61-63 µm; length of the apical processes 6 µm, sutural spines length 4 µm.