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Wanneria hispida
Wanneria hispida sp. nov., Mantle et al. 2020, p. 34
Holotype: Mantle et al. 2020, Plate VI, 3
Type locality: Northern Carnarvon Basin
Local stratigraphical range: Late Triassic (latest Carian to Rhaetian)
Original description: Mantle et al. 2020:
Description:
Small, proximate to proximochorate, subspherical dinoflagellate cysts with approximately equant epicysts and hypocysts.
Wall: autophragm is scabrate to granulate, with low ridges delimiting an apparently standard suessioid tabulation. These sutural ridges are surmounted by a dense covering of short (0.5–3 μm) spines that may be strongly acuminate or have blunt or rounded tips. The densely granulate autophragm and the abundant spines obscure the full tabulation pattern. However, there are at least seven, and possibly up to nine, latitudinal series.
Archaeopyle: formed by the loss of a single opercular piece comprising all the apical plates and the adjacent latitudinal series. The latter may include both anterior intercalary and postapical plates.
Dimensions:
Overall length (excluding apical plates) 25 μm (29 μm) 33 μm; maximum width 33 μm (39 μm) 47 μm.
10 measured specimens
Affinities/Comparison:
Wanneria hispida sp. nov. is substantially smaller than most specimens of Wanneria listeri. Furthermore, the former has a denser covering of spines and a rougher, granulate autophragm than the latter. Even the smaller specimens of Wanneria listeri normally retain the regular rows of sutural spines and the well-defined suessioid tabulation, although there is some intergradation between the two species. The dense spines, strongly granulate autophragm and simple operculum also distinguish Wanneria hispida from Suessia? scabrata, which is similar in size.
Holotype: Mantle et al. 2020, Plate VI, 3
Type locality: Northern Carnarvon Basin
Local stratigraphical range: Late Triassic (latest Carian to Rhaetian)
Original description: Mantle et al. 2020:
Description:
Small, proximate to proximochorate, subspherical dinoflagellate cysts with approximately equant epicysts and hypocysts.
Wall: autophragm is scabrate to granulate, with low ridges delimiting an apparently standard suessioid tabulation. These sutural ridges are surmounted by a dense covering of short (0.5–3 μm) spines that may be strongly acuminate or have blunt or rounded tips. The densely granulate autophragm and the abundant spines obscure the full tabulation pattern. However, there are at least seven, and possibly up to nine, latitudinal series.
Archaeopyle: formed by the loss of a single opercular piece comprising all the apical plates and the adjacent latitudinal series. The latter may include both anterior intercalary and postapical plates.
Dimensions:
Overall length (excluding apical plates) 25 μm (29 μm) 33 μm; maximum width 33 μm (39 μm) 47 μm.
10 measured specimens
Affinities/Comparison:
Wanneria hispida sp. nov. is substantially smaller than most specimens of Wanneria listeri. Furthermore, the former has a denser covering of spines and a rougher, granulate autophragm than the latter. Even the smaller specimens of Wanneria listeri normally retain the regular rows of sutural spines and the well-defined suessioid tabulation, although there is some intergradation between the two species. The dense spines, strongly granulate autophragm and simple operculum also distinguish Wanneria hispida from Suessia? scabrata, which is similar in size.