Subfamily Gonyaulacoideae

Subfamily Gonyaulacoideae

Citation: Gonyaulacoideae (Autonym). Diagnosis:Gonyaulacaceans with an S-type ventral organization, typically neutral torsion and three or four climactal plates excluding small dorsal anterior intercalary plates (so-called "incidental plates"), where present. Of these climactal plates, the first apical homologue (*1\') is reduced or absent. There are six Kofoid precingular plates. Type genus: Gonyaulax Diesing, 1866. Extant genera: Acanthogonyaulax ( Kofoid, 1911) Graham, 1942. Amylax Meunier, 1910. Gonyaulax Diesing, 1866. (=Roulea Gourret, 1883; taxonomic junior synonym according to Schiller, 1935b, p.275) (=Steiniella Schütt, 1895; taxonomic junior synonym by general consensus) Spiraulax Kofoid, 1911b. (=Spiraulaxina Loeblich III, 1970; taxonomic junior synonym according to Taylor, 1976a, p.111) Fossil genera: Achomosphaera Evitt, 1963; Late Cretaceous. Ataxiodinium Reid, 1974; Holocene. ?Avellodinium Duxbury, 1977; Cretaceous (Berriasian-Barremian). Bitectatodinium Wilson, 1973; Mid Pleistocene. (=Caledonidinium Reid, 1974; taxonomic junior synonym according to Harland, 1977b, p.93) ?Cannosphaeropsis O. Wetzel, 1933b; Cretaceous (Senonian). ?Catastomocystis C. Singh, 1983; Cretaceous (Cenomanian). Chaenosphaerula Damassa, 1997; Late Oligocene. Corrudinium Stover and Evitt, 1978; Oligocene. Dalella McMinn and Sun Xuekun, 1994; Holocene. Daveya Monteil, 1996; Cretaceous (Ryazanian). ?Ectosphaeropsis Londeix and Jan du Chêne, 1988; Miocene (Burdigalean). Edwardsiella Versteegh and Zevenboom in Versteegh, 1995; Oligocene-Pliocene (Chattian-Piacenzian). Evittosphaerula Manum, 1979; Mid Oligocene-Early Miocene. Exiguisphaera Duxbury, 1979a; Cretaceous (Hauterivian). Flandrecysta Slimani, 1994; Cretaceous (Campanian-Maastrichtian). Hafniasphaera Hansen, 1977; Paleocene (Danian). (=Rivernookia Cookson and Eisenack, 1982; taxonomic junior synonym according to Lentin and Williams, 1985, p.311) Hystrichosphaeropsis Deflandre, 1935; Cretaceous (Senonian). ?Hystrichostrogylon Agelopoulos, 1964; Late Eocene. Impagidinium Stover and Evitt, 1978; Late Eocene. Nematosphaeropsis Deflandre and Cookson, 1955; Holocene. (=Coccopterum Silva, 1970; taxonomic junior synonym - type is now inNematosphaeropsis ) (=Pterococcus Lohmann, 1904; homonym -Coccopterum is substitute) ?Okerisphaeridium Kunz, 1990; Jurassic (Oxfordian) Pentadinium Gerlach, 1961; Mid Oligocene-Mid Miocene. (=Planinosphaeridium Eisenack, 1965b; taxonomic junior synonym according to Stover and Evitt, 1978, p.179-180) (=Toenisbergia Benedek et al., 1982; taxonomic junior synonym according to Lentin and Williams, 1985, p.356) Piccoladinium Versteegh and Zevenboom in Versteegh, 1995; Oligocene-Pliocene (Chattian-Piacenzian). Prionodinium Leffingwell and Morgan, 1977; Cretaceous (Neocomian). Psaligonyaulax Sarjeant, 1966b; Cretaceous (Cenomanian). Pterodinium Eisenack, 1958a; Cretaceous (Aptian). Rottnestia Cookson and Eisenack, 1961b; Early Oligocene. Seriliodinium Eaton, 1996; Pliocene-Pleistocene. Spiniferites Mantell, 1850; Late Cretaceous. (=Hystrichokibotium Klumpp, 1953; taxonomic junior synonym implied in Gocht, 1969, p.32) (=Hystrichosphaera O. Wetzel, 1933b; taxonomic junior synonym according to Sarjeant, 1970, p.75) Tectatodinium Wall, 1967; Miocene-Holocene. Trabeculidium Duxbury, 1980; Cretaceous (Barremian). ?Triblastula O. Wetzel, 1933b; Late Cretaceous. Tubotuberella Vozzhennikova, 1967; Late Jurassic. (=Dimidiadinium Brideaux, 1977; taxonomic junior synonym - see Lentin and Williams, 1989, p.106 (=Glabridinium Brideaux, 1977; taxonomic junior synonym according to Sarjeant, 1982b, p.41) Turnhosphaera Slimani, 1994; Cretaceous (Santonian). Unipontidinium Wrenn, 1988; Mid Miocene. Wilsonisphaera Slimani, 1994; Cretaceous (Senonian). (=Glaphyrosphaera Schiøler and Wilson, 1994; taxonomic junior synonym according to Schiøler and Wilson, 1995, p.511) Wrevittia Helenes and Lucas-Clark, 1997; Cretaceous (Neocomian-Aptian). Other names: (Imperfectodinium Zevenboom and Santarelli in Zevenboom, 1995; name not validly published)

Parent: Family Gonyaulacaceae