Mastodiscus radiatus (Bailey) Prasad and Nienow (2008: 264)

Sims, Pat A., Williams, David M. & Ashworth, Matt, 2018, Examination of type specimens for the genera Odontella and Zygoceros (Bacillariophyceae) with evidence for the new family Odontellaceae and a description of three new genera, Phytotaxa 382 (1), pp. 1-56 : 23

publication ID

https://doi.org/ 10.11646/phytotaxa.382.1.1

DOI

https://doi.org/10.5281/zenodo.13724242

persistent identifier

https://treatment.plazi.org/id/12590703-F40A-FF81-22DC-FF11FA8B243B

treatment provided by

Felipe

scientific name

Mastodiscus radiatus (Bailey) Prasad and Nienow (2008: 264)
status

 

Mastodiscus radiatus (Bailey) Prasad and Nienow (2008: 264) ( Figs 76–80 View FIGURES 76–80 )

Basionym:— Auliscus radiatus Bailey (1854: 6 , fig. 13)

Synonyms:— Auliscus baileyii Greville (1863: 49) Pseudauliscus radiatus (Bailey) A. Schmidt (1875 : pl. 32, fig. 28) Pseudauliscus radiatus (Bailey) Rattray (1888: 902)

Type:— USA, Rockaway, New York (FH-Harvard Bailey #1979, lectotype designated by Prasad and Nienow 2008: 254, specimen found at England finder K-34, http://www2.huh.harvard.edu/diatom/baileycat.htm)

Valve face circular, sub-circular or oval, diameter 40–90μm, with two large opposing ocelli at the poles in subcircular-oval specimens ( Figs 76, 77 View FIGURES 76–80 ). Ocelli with broad hyaline rims and radial rows of porelli ( Fig. 78 View FIGURES 76–80 ). Valve surface slightly concave with a central transapically aligned oval ridge enclosing a small raised central area ( Fig. 77 View FIGURES 76–80 ). Valve face bordered by a sipho ridge, a sipho marginalis occupying valve mantle. Areolae poroid arranged in primary and secondary rows radiating towards central area, c. 5 areolae in 10μm. Areolae occluded on exterior by sunken cribra ( Fig. 79 View FIGURES 76–80 ). groups of 6–9 small poroid areolae in a ring (= specialised pores?) at irregular intervals ( Fig. 79 View FIGURES 76–80 , arrow). Rimoportulae 2, positioned marginally equidistant from ocelli ( Fig. 77 View FIGURES 76–80 ), external opening through short hollow spine, internally radially aligned slit across raised lips ( Fig. 80 View FIGURES 76–80 ).

Observations:— The description above is based on material from Pensacola, Florida, USA ( BM).

BM

Bristol Museum

Kingdom

Chromista

Phylum

Ochrophyta

Class

Bacillariophyceae

Order

Triceratiales

Family

Triceratiaceae

Genus

Mastodiscus

Loc

Mastodiscus radiatus (Bailey) Prasad and Nienow (2008: 264)

Sims, Pat A., Williams, David M. & Ashworth, Matt 2018
2018
Loc

Mastodiscus radiatus (Bailey) Prasad and Nienow (2008: 264)

Prasad, A. K. S. K. & Nienow, J. 2008: )
2008
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