WoRMS source details
Scoble, J. M.; Cavalier-Smith, T. (2014). Scale evolution, sequence phylogeny, and taxonomy of thaumatomonad Cercozoa: 11 new species and new genera Scutellomonas, Cowlomonas, Thaumatospina and Ovaloplaca. European Journal of Protistology. 50(3): 270-313.
225469
10.1016/j.ejop.2013.12.005 [view]
Scoble, J. M.; Cavalier-Smith, T.
2014
Scale evolution, sequence phylogeny, and taxonomy of thaumatomonad Cercozoa: 11 new species and new genera Scutellomonas, Cowlomonas, Thaumatospina and Ovaloplaca
European Journal of Protistology
50(3): 270-313
Publication
We describe 11 new species of Thaumatomonadida using light and electron microscopy and rDNA gene sequences (18S, ITS1, 5.8S, ITS2). We found clear distinctions between major clades in molecular and morphological traits that support now splitting Thaumatomastix into three genera: new marine genera Ovaloplaca (oval plate-scales) and Thaumatospina (triangular plate-scales), both with distinctive radially-symmetric bobbin-based spine-scales, restricting Thaumatomastix to freshwater species with putatively non-homologous eccentric-spine scales and thicker triangular plate-scales. New genus Scutellomonas lacks spine-scales, having oval plate-scales with deeply-dished upper tier as in Ovaloplaca, with which it forms a clade having short/absent anterior cilium. Cowlomonas gen. n. is possibly naked. We describe two new Allas species, two new Thaumatomonas, and one new Reckertia species, and transfer R. hindoni to Thaumatomonas. Triangular-scaled Reckertia has varied plate-scales and ciliary scales. Thaumatomonas rDNA trees reveal two clades: zhukovi/seravini (predominantly triangular scales); coloniensis/oxoniensis/lauterborni/constricta/solis (scales mostly oval). We hypothesise that the ancestor of Thaumatomonadidae had radially-symmetric bobbin-based spine-scales and triangular plate-scales, bobbin-based spine-scales being lost in one lineage and eccentric-spine scales evolving in Thaumatomastix. Bobbin-based spine-scales arguably evolved from triangular plate-scales and single-tier ciliary scales (Ovaloplaca and Reckertia only) from plate-scale rudiments. We present a unified scheme for scale evolution and development in Imbricatea.
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Ovaloplaca Scoble & Cavalier-Smith, 2014 (original description)
Ovaloplaca asymmetrica (Nicholls, 2012) Scoble & Cavalier-Smith, 2014 (basis of record)
Ovaloplaca bipartita (Beech & Moestrup, 1986) Scoble & Cavalier-Smith, 2014 (basis of record)
Ovaloplaca multipora (Nicholls, 2012) Scoble & Cavalier-Smith, 2014 (basis of record)
Ovaloplaca yabukii Scoble & Cavalier-Smith, 2014 (original description)
Reckertia gemma Scoble & Cavalier-Smith, 2014 (original description)
Scutellomonas Scoble & Cavalier-Smith, 2014 (original description)
Scutellomonas patella Scoble & Cavalier-Smith, 2014 (original description)
Scutellomonas thomseni (Tong, 1997) Scoble & Cavalier-Smith, 2014 (basis of record)
Thaumatospina Scoble & Cavalier-Smith, 2014 (original description)
Thaumatospina arabica Scoble & Cavalier-Smith, 2014 (original description)
Thaumatospina mexica Scoble & Cavalier-Smith, 2014 (original description)
Thaumatospina vancouveri Scoble & Cavalier-Smith, 2014 (original description)
Ovaloplaca asymmetrica (Nicholls, 2012) Scoble & Cavalier-Smith, 2014 (basis of record)
Ovaloplaca bipartita (Beech & Moestrup, 1986) Scoble & Cavalier-Smith, 2014 (basis of record)
Ovaloplaca multipora (Nicholls, 2012) Scoble & Cavalier-Smith, 2014 (basis of record)
Ovaloplaca yabukii Scoble & Cavalier-Smith, 2014 (original description)
Reckertia gemma Scoble & Cavalier-Smith, 2014 (original description)
Scutellomonas Scoble & Cavalier-Smith, 2014 (original description)
Scutellomonas patella Scoble & Cavalier-Smith, 2014 (original description)
Scutellomonas thomseni (Tong, 1997) Scoble & Cavalier-Smith, 2014 (basis of record)
Thaumatospina Scoble & Cavalier-Smith, 2014 (original description)
Thaumatospina arabica Scoble & Cavalier-Smith, 2014 (original description)
Thaumatospina mexica Scoble & Cavalier-Smith, 2014 (original description)
Thaumatospina vancouveri Scoble & Cavalier-Smith, 2014 (original description)