Back
Phthanoperidinium comatum
Phthanoperidinium comatum (Morgenroth, 1966) Eisenack and Kjellstr÷m, 1971
Originally Peridinium, subsequently (and now) Phthanoperidinium.
Taxonomic junior synonyms: Phthanoperidinium tritonium, according to Bujak in Bujak et al. (1980, p.72) — however, Fensome et al. (2009, p.54–55) considered Phthanoperidinium tritonium to be a taxonomic junior synonym of Phthanoperidinium coreoides; Hystrichogonyaulax (now Phthanoperidinium) coreoides, according to Stover and Evitt (1978, p.118) — however, Benedek and Sarjeant (1981, p.328–330) retained Phthanoperidinium coreoides. Eaton (1976, p.294) also proposed this combination.
Holotype: Morgenroth, 1966, pl.1, fig.1
Age: Early Oligocene
G.L. Williams short notes on species, Mesozoic-Cenozoic dinocyst course, Urbino, Italy, May 17-22, 1999 - LPP
Phthanoperidinium comatum (Morgenroth, 1966b) Eisenack and Kjellström, 1972. Diagnosis (in part) from Morgenroth (1966b, p.1). A small species of Peridinium with the tabulation 4', 3a, 7", 5"’, 2"”. From the plate boundaries arise numerous long, filamentous processes which distally can split into small spines. Size: length 33-47 µm, width 25-33 µm, spines 14-28. Phthanoperidinium coreoides size: capsule length 36-38 µm, width 26 µm, process length 6-8 µm. Phthanoperidinium tritonium, holotype cyst body 44 x 37 µm, length of spines up to 7 µm, observed range, 30x 26 to 56 x 46, length of spines up to 13 µm.
Originally Peridinium, subsequently (and now) Phthanoperidinium.
Taxonomic junior synonyms: Phthanoperidinium tritonium, according to Bujak in Bujak et al. (1980, p.72) — however, Fensome et al. (2009, p.54–55) considered Phthanoperidinium tritonium to be a taxonomic junior synonym of Phthanoperidinium coreoides; Hystrichogonyaulax (now Phthanoperidinium) coreoides, according to Stover and Evitt (1978, p.118) — however, Benedek and Sarjeant (1981, p.328–330) retained Phthanoperidinium coreoides. Eaton (1976, p.294) also proposed this combination.
Holotype: Morgenroth, 1966, pl.1, fig.1
Age: Early Oligocene
G.L. Williams short notes on species, Mesozoic-Cenozoic dinocyst course, Urbino, Italy, May 17-22, 1999 - LPP
Phthanoperidinium comatum (Morgenroth, 1966b) Eisenack and Kjellström, 1972. Diagnosis (in part) from Morgenroth (1966b, p.1). A small species of Peridinium with the tabulation 4', 3a, 7", 5"’, 2"”. From the plate boundaries arise numerous long, filamentous processes which distally can split into small spines. Size: length 33-47 µm, width 25-33 µm, spines 14-28. Phthanoperidinium coreoides size: capsule length 36-38 µm, width 26 µm, process length 6-8 µm. Phthanoperidinium tritonium, holotype cyst body 44 x 37 µm, length of spines up to 7 µm, observed range, 30x 26 to 56 x 46, length of spines up to 13 µm.