Back
Rhaetogonyaulax testacea
Rhaetogonyaulax testacea Fisher and Van Helden, 1979
Tax. jr. synonym of Rhaetogonyaulax rhaetica (Sarjeant, 1963) Loeblich Jr. and Loeblich III., 1968, according to Below, 1987.
Holotype: Fisher and Van Helden 1979, pl.1, fig.1-4
Locus typicus: Ellef Ringnes Island, Canadian Arctic Archipelago
Stratum typicum: Middle Norian-Rhaetian
Original diagnosis: Fisher and Van Helden 1979, p. 267
Same as for the genus with the following additional description: the cyst wall is dominantly reticulate, without further ornamentation. Archaeopyle formation is by the loss of A4 " + 5I (Text-Figure 3A) and with the paraplates la and/or 5a sometimes loosely attached to the precingular series. Epicystal paratabulation is 1(?2) pr, 6", 5a, 7".
Dimensions: Holotype: length 71µm, width 51µm.
Paratypes: (10 specimens measured) length 71-74µm, width 47-52µm.
Affinities:
Fisher and Van Helden, 1979, p. 267: R. testacea differs from R. rhaetica and from R. rhaetica chaloneri (Sarjeant) Lentin and Williams, in possessing an apparently different mode of archaeopyle formation of a type A4 " + 5I, whereas R. rhaetica and R. rhaetica chaloneri possess an archaeopyle with an undivided operculum (6A5I).
Tax. jr. synonym of Rhaetogonyaulax rhaetica (Sarjeant, 1963) Loeblich Jr. and Loeblich III., 1968, according to Below, 1987.
Holotype: Fisher and Van Helden 1979, pl.1, fig.1-4
Locus typicus: Ellef Ringnes Island, Canadian Arctic Archipelago
Stratum typicum: Middle Norian-Rhaetian
Original diagnosis: Fisher and Van Helden 1979, p. 267
Same as for the genus with the following additional description: the cyst wall is dominantly reticulate, without further ornamentation. Archaeopyle formation is by the loss of A4 " + 5I (Text-Figure 3A) and with the paraplates la and/or 5a sometimes loosely attached to the precingular series. Epicystal paratabulation is 1(?2) pr, 6", 5a, 7".
Dimensions: Holotype: length 71µm, width 51µm.
Paratypes: (10 specimens measured) length 71-74µm, width 47-52µm.
Affinities:
Fisher and Van Helden, 1979, p. 267: R. testacea differs from R. rhaetica and from R. rhaetica chaloneri (Sarjeant) Lentin and Williams, in possessing an apparently different mode of archaeopyle formation of a type A4 " + 5I, whereas R. rhaetica and R. rhaetica chaloneri possess an archaeopyle with an undivided operculum (6A5I).