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Dinopterygium tuberculatum
Dinpoterygium tuberculatum (Eisenack and Cookson 1960) Stover and Evitt 1978
Originally Oodnadattia, subsequently (and now) Dinopterygium.
Tax. jr. synonym of Dinopterygium cladoides Deflandre, 1935, according to Clarke and Verdier, 1967. Stover and Evitt, 1978, retained Dinopterygium tuberculatum as a separate species.
Tax. sr. synonym of Oodnadattia cooksoniae Kimyai, 1966, according to Below, 1981.
Tax. sr. synonym of Leptodinium? micropunctatum Jain and Millepied, 1975, according to Below, 1981. Lentin and Williams, 1981, retained Leptodinium? micropunctatum as a separate species.
Holotype: Eisenack and Cookson, 1960, pl.2, fig.10
Locus typicus: Oodnadatta bore, S Australia
Stratum typicum: Albian
Original description: Eisenack and Cookson, 1960, p. 6-7: Oodnadattia tuberculata
The epitheca is composed of 3 apical plates, plate 1" being circular and small and covering the apex, plates 2" and 3" being larger and polygonal, and 7 pre-equatorial plates, 5 of which are seperated by 4 intermediate plates, a""-d""; both the pre-equatorial and intermediate plates extend to the equatorial wing. Plates 2" and 3" and 1""-7"" are sparsely scattered with small circular tubercules, the intermediate plates are smooth. The hypotheca is composed of a relatively large antapical plate 1"""", 5 post-equatorial plates and 4 (or 5) intermediate plates, a"""-d""". Plates 1"""-5""" and 1"""" are tuberculare, the intermediate plates are smooth. The equatorial wing of the hypotheca is narrower than that of the epitheca.
Dimensions: Type: overall diameter 108 Ám. Overall range 95-112 Ám.
Supplemental description: Morgan, 1980, p. 30: Oodnadattia tuberculata
Cyst outline circular in apical view, polygonal in cingular view; endophragm subspherical, psilate; periphragm psilate, closely appressed to endophragm: periphragm bears parasutural crests and intratabular or peritabular tubercles reflecting gonyaulacean tabulation; parasutural crests ovcr most of the cyst 2-3 Ám high, sometimes slightly inflated; paracingular crests 12-18 Ám high, with two appressed crests on the apical side, and a single crest on the antapical side; paired parasulcal crests low at the paracingulum (3-4 Ám), increasing in height in a distinct double lobed manner, to 18-25 Ám high near the antapex: tubercles may be small (0.5-1 Ám) and solid or larger (1-2.5 Ám) and hollow, intratabular or slightly peritabular when there are fewer tubercles: archeopyle epicystal, between the apical pair of cingular parasutural crests operculum free, consisting of entire epicyst with one cingular parasutural crest attached.
Supplemental description: Prössl, 1992, p. 265
The cyst is normally longer than broad and double layered. Paraplates bear irregularly scattered tubercles. The height of the low crests increases to the apex and antapex. Antapically they develop a process which may extend to 23 Ám in lenght. The cingulum is narrow and bordered by high crests.
Dimensions: overall length: 66(76)81 Ám, overall breadth: 62(75)88 Ám, maximum crest height: 7(9)10 Ám, antapical process: 14(21)23 Ám. Five specimens measured.
Affinities:
Prössl, 1992, p. 265: Dinopterygium tuberculatum can be distinguished from Dinopterygium cladoides Deflandre 1935 in having much lower crests than the latter species. Dinopterygium cladoides also has a less clearly developed single antapical process than Dinopterygium tuberculatum and Dinopterygium
konradense Prössl 1990 and seems to be intermediate between both the latter species. The problematical description of Oodnattia tuheculata by Eisenack and Cookson (1960, p.7) with intermediate plates seems to depend on folding the crests and compressing them to the body. They were not reported by Morgan (1980). A similar situation applies to Morgan"s triple paracingular crests which he could not prove in lateral views. None of these features could be reported from the investigated specimens of Dinopterygium tuberculatum from Colombia.
Originally Oodnadattia, subsequently (and now) Dinopterygium.
Tax. jr. synonym of Dinopterygium cladoides Deflandre, 1935, according to Clarke and Verdier, 1967. Stover and Evitt, 1978, retained Dinopterygium tuberculatum as a separate species.
Tax. sr. synonym of Oodnadattia cooksoniae Kimyai, 1966, according to Below, 1981.
Tax. sr. synonym of Leptodinium? micropunctatum Jain and Millepied, 1975, according to Below, 1981. Lentin and Williams, 1981, retained Leptodinium? micropunctatum as a separate species.
Holotype: Eisenack and Cookson, 1960, pl.2, fig.10
Locus typicus: Oodnadatta bore, S Australia
Stratum typicum: Albian
Original description: Eisenack and Cookson, 1960, p. 6-7: Oodnadattia tuberculata
The epitheca is composed of 3 apical plates, plate 1" being circular and small and covering the apex, plates 2" and 3" being larger and polygonal, and 7 pre-equatorial plates, 5 of which are seperated by 4 intermediate plates, a""-d""; both the pre-equatorial and intermediate plates extend to the equatorial wing. Plates 2" and 3" and 1""-7"" are sparsely scattered with small circular tubercules, the intermediate plates are smooth. The hypotheca is composed of a relatively large antapical plate 1"""", 5 post-equatorial plates and 4 (or 5) intermediate plates, a"""-d""". Plates 1"""-5""" and 1"""" are tuberculare, the intermediate plates are smooth. The equatorial wing of the hypotheca is narrower than that of the epitheca.
Dimensions: Type: overall diameter 108 Ám. Overall range 95-112 Ám.
Supplemental description: Morgan, 1980, p. 30: Oodnadattia tuberculata
Cyst outline circular in apical view, polygonal in cingular view; endophragm subspherical, psilate; periphragm psilate, closely appressed to endophragm: periphragm bears parasutural crests and intratabular or peritabular tubercles reflecting gonyaulacean tabulation; parasutural crests ovcr most of the cyst 2-3 Ám high, sometimes slightly inflated; paracingular crests 12-18 Ám high, with two appressed crests on the apical side, and a single crest on the antapical side; paired parasulcal crests low at the paracingulum (3-4 Ám), increasing in height in a distinct double lobed manner, to 18-25 Ám high near the antapex: tubercles may be small (0.5-1 Ám) and solid or larger (1-2.5 Ám) and hollow, intratabular or slightly peritabular when there are fewer tubercles: archeopyle epicystal, between the apical pair of cingular parasutural crests operculum free, consisting of entire epicyst with one cingular parasutural crest attached.
Supplemental description: Prössl, 1992, p. 265
The cyst is normally longer than broad and double layered. Paraplates bear irregularly scattered tubercles. The height of the low crests increases to the apex and antapex. Antapically they develop a process which may extend to 23 Ám in lenght. The cingulum is narrow and bordered by high crests.
Dimensions: overall length: 66(76)81 Ám, overall breadth: 62(75)88 Ám, maximum crest height: 7(9)10 Ám, antapical process: 14(21)23 Ám. Five specimens measured.
Affinities:
Prössl, 1992, p. 265: Dinopterygium tuberculatum can be distinguished from Dinopterygium cladoides Deflandre 1935 in having much lower crests than the latter species. Dinopterygium cladoides also has a less clearly developed single antapical process than Dinopterygium tuberculatum and Dinopterygium
konradense Prössl 1990 and seems to be intermediate between both the latter species. The problematical description of Oodnattia tuheculata by Eisenack and Cookson (1960, p.7) with intermediate plates seems to depend on folding the crests and compressing them to the body. They were not reported by Morgan (1980). A similar situation applies to Morgan"s triple paracingular crests which he could not prove in lateral views. None of these features could be reported from the investigated specimens of Dinopterygium tuberculatum from Colombia.