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Voodooia
From Williams et al., 2017:
[Voodooia, Riding and Helby, 2001d, p.93-95.
Type species: Voodooia tabulata, Riding and Helby, 2001d (fig.18M)]
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Original description: [Riding and Helby, 2001d]:
Diagnosis:
Proximate, acavate, longitudinally elongate ellipsoidal cysts with a single, long apical horn and two shorter antapical horns. Intermediate to large in size. Epicyst significantly longer than hypocyst.
Paratabulation indicated by low relief ornamentational features and of pareodinioid style; paratabulation formula: 3', 2a, 6", 7c, 6"', 2"", 5s. Archaeopyle anterior intercalary, probably one or two-paraplate (type I or 2I). Operculum probably compound, attached or free.
Remarks:
Voodooia gen. nov. is a pareodinioid genus with two anterior intercalary paraplates which may be lost in archaeopyle formation (Fig. 17). The precise archaeopyle style, however, has not been determined. The genotype, Voodooia tabulata sp. nov., appears to exhibit paraplate dehisence in the anterior intercalary series. However, whether one or two paraplates are lost and if these are attached or free, is not clear.
Affinities:
Voodooia is similar to some other elongate pareodinioid genera, specifically Batioladinium Brideaux 1975 and Broomea Cookson & Eisenack 1958. Batioladinium is not normally fully paratabulate (but see Below, 1990 fig. 15). Similarly, AprobolocystaDuxbury 1977 is distinguished from Voodooia by the apical archaeopyle, variable cavation and the lack of a long apical horn (Duxburry, 1977, p. 52; Blackhouse, 1987) Broomea Cookson & Eisenack 1958 is also similar to Voodooia, but is variably paratabulate and has unequivocal one- or two-paraplate anterior intercalary archaeopyle (type I or type 2I) . The genotype, Broomea ramosa Cookson & Eisenack 1958, is also characterised by two groups of bunched antapical appendages (Cookson & Eisenack, 1958, pl.6, figs 6,7). Voodooia has some similarities to Gresslyodinium Below 1990, but this has a single antapical horn or protusion. Cantulodinium Alberti 1961, differs from Voodooia in being pear-shaped, nontabulate and having a three paraplate (type 3I) anterior intercalary archeopyle. Furthermore, it may have several relatively small, thorn-like antapical horns or appendages (Van Helden, 1986). Other broomeoid and pareodinioid genera such as Gochteodinia Norris 1978, Paraevansia Below 1990 and Pareodinia Deflandre 1947 lack antapical horns and Kalyptea Cookson & Eisenack 1960 is typically kalyptrate. Protobatioladinium Nøhr-Hansen 1986 has a combination apical-intercalary, type (tA) + (2I), archaeopyle and lacks paired antapical horns (Nøhr-Hansen, 1986).
[Voodooia, Riding and Helby, 2001d, p.93-95.
Type species: Voodooia tabulata, Riding and Helby, 2001d (fig.18M)]
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Original description: [Riding and Helby, 2001d]:
Diagnosis:
Proximate, acavate, longitudinally elongate ellipsoidal cysts with a single, long apical horn and two shorter antapical horns. Intermediate to large in size. Epicyst significantly longer than hypocyst.
Paratabulation indicated by low relief ornamentational features and of pareodinioid style; paratabulation formula: 3', 2a, 6", 7c, 6"', 2"", 5s. Archaeopyle anterior intercalary, probably one or two-paraplate (type I or 2I). Operculum probably compound, attached or free.
Remarks:
Voodooia gen. nov. is a pareodinioid genus with two anterior intercalary paraplates which may be lost in archaeopyle formation (Fig. 17). The precise archaeopyle style, however, has not been determined. The genotype, Voodooia tabulata sp. nov., appears to exhibit paraplate dehisence in the anterior intercalary series. However, whether one or two paraplates are lost and if these are attached or free, is not clear.
Affinities:
Voodooia is similar to some other elongate pareodinioid genera, specifically Batioladinium Brideaux 1975 and Broomea Cookson & Eisenack 1958. Batioladinium is not normally fully paratabulate (but see Below, 1990 fig. 15). Similarly, AprobolocystaDuxbury 1977 is distinguished from Voodooia by the apical archaeopyle, variable cavation and the lack of a long apical horn (Duxburry, 1977, p. 52; Blackhouse, 1987) Broomea Cookson & Eisenack 1958 is also similar to Voodooia, but is variably paratabulate and has unequivocal one- or two-paraplate anterior intercalary archaeopyle (type I or type 2I) . The genotype, Broomea ramosa Cookson & Eisenack 1958, is also characterised by two groups of bunched antapical appendages (Cookson & Eisenack, 1958, pl.6, figs 6,7). Voodooia has some similarities to Gresslyodinium Below 1990, but this has a single antapical horn or protusion. Cantulodinium Alberti 1961, differs from Voodooia in being pear-shaped, nontabulate and having a three paraplate (type 3I) anterior intercalary archeopyle. Furthermore, it may have several relatively small, thorn-like antapical horns or appendages (Van Helden, 1986). Other broomeoid and pareodinioid genera such as Gochteodinia Norris 1978, Paraevansia Below 1990 and Pareodinia Deflandre 1947 lack antapical horns and Kalyptea Cookson & Eisenack 1960 is typically kalyptrate. Protobatioladinium Nøhr-Hansen 1986 has a combination apical-intercalary, type (tA) + (2I), archaeopyle and lacks paired antapical horns (Nøhr-Hansen, 1986).