Diatoms of the coastal regions of Florida and Georgia
Dr. A. K. S. K. Prasad, Florida State University
Dr. J. A. Nienow, Valdosta State University

Participating students:  Emily Olsen, Jesse Trull

 

Some interesting taxa (links are to images published by us on MorphBank.net):

Climaconeis colemaniae A.K.S.K. Prasad

Climaconeis koenigii A.K.S.K. Prasad

Climaconeis riddleae A.K.S.K. Prasad

Climaconeis silvae A.K.S.K. Prasad

Cyclotella choctawhatcheeana A.K.S.K. Prasad

Cyctotella desikacharyi A.K.S.K. Prasad

Delphineis livingstonii A.K.S.K. Prasad

Desikaneis gessneri (Hustedt) Prasad (formerly Fragilaria gessneri Hustedt)

Desikaneis howellii Prasad

Eupodiscus radiatus Bailey

Fryxelliella floridana A.K.S.K. Prasad

Mastodiscus radiatus (Bailey) Prasad & Nienow (formerly Pseudauliscus radiatus (J. W. Bailey) A. Schmidt)

Neohuttonia reichardtii (Grunow) Kuntze

Pseudauliscus peruvianus (Kitton ex Ralfs in Pritchard) A. Schmidt

Reimerothrix floridensis A.K.S.K. Prasad

Synedropsis karsteteri A.K.S.K. Prasad

Thalassiosira cedarkeyensis A.K.S.K. Prasad

Tryblioptychus cocconeiformis (Grunow ex Cleve) Hendey

 

Publications:

Prasad, A. K. S. K., and J. A. Nienow. 2008. Transfer of the extant marine diatom Pseudauliscus radiatus (Eupodiscaceae) to the forgotten genus Mastodiscus Bailey and an emended generic description of Fryxelliella.  Nova Hedwigia, Beiheft  133:251-267

Prasad, A. K. S. K., J. A. Nienow, and K. A. Riddle. 2006. A light and scanning electron microscopical study of the diatom P. peruvianus living in the northern Gulf of Mexico, with comments on lectotypification and systematics.  Nova Hedwigia, Beiheft 130:225-244

Prasad, A. K. S. K., and J. A. Nienow. 2006.  The centric diatom genus Cyclotella (Stephanodiscaceae: Bacillariophyta) from Florida Bay, USA, with special reference to C. choctawhatcheeana Prasad and C. desikacharyi, a new marine species related to the C. striata complex.  Phycologia 45:127-141

Prasad, A. K. S. K., and R. J. Livingston. 2005.  Fine structure and taxonomy of Synedropsis karsteteri sp. nov. (Fragilariaceae, Bacillariophyta), a bloom-forming, brackish-water, planktonic araphid diatom from Perdido Bay, northeastern Gulf of Mexico.  Diatom Research 20:112-128

Prasad, A. K. S. K., J. A. Nienow, and R. J. Livingston. 2002. The marine diatom genus Tryblioptychus Hendey (Thalassiosiraceae, Coscinodiscophyceae): Fine structure, taxonomy, systematics, and distribution.  Diatom Research 17:291-308

Prasad, A. K. S. K., J. A. Nienow, and K. A. Riddle.  2001. Fine structure, taxonomy, and systematics of Reimerothrix (Fragilariaceae, Bacillariophyta), a new genus of synedroid diatoms from Florida Bay, USA. Phycologia 40:35-46

Prasad, A. K. S. K., K. A. Riddle, and J. A. Nienow.  2000. Marine diatom genus Climaconeis (Berkeleyaceae, Bacillariophyta): two new species, Climaconeis koenigii and C. colemaniae, from Florida Bay, USA. Phycologia 39:199-211

Prasad, A.K.S.K., K. A. Riddle and R. J.Livingston.  1997.  Fine Structure, taxonomy and systematics of  Fryxelliella, a new genus centric diatoms, having a new valve feature, circumferential marginal tube  with descriptions of F. floridana sp. nov. and F. inconspicua (Grevill) comb. nov.  Phycologia 36:305-323

Prasad, A. K. S. K. and G. A. Fryxell. 1993. The genus Thalassiosira: T. cedarkeyensis, a new marine benthic diatom from the Florida coast of the Gulf of Mexico with tangential undulated valves and occluded processes.  Phycologia 32:204-212

Prasad, A. K. S. K., and R. J. Livingston. 1993. Frustule morphology of the planktonic pennate diatom Fragilaria gessneri Hustedt (Bacillariophyceae) from Florida coast of the Gulf of Mexico, with a description of Desikaneis gen. nov.   Phycologia 32:434-443

Prasad, A. K. S. K., J. A. Nienow, and R. J. Livingston. 1990.  The genus Cyclotella (Bacillariophyta) in Choctawhatchee Bay, Florida, with special reference to C. striata and C. choctawhatcheeana sp. nov. Phycologia 29:418-436

 

Recent Presentations

An interesting pennate diatom from the northeastern Gulf of Mexico – with A. K. S. K. Prasad.  Presented at the 31st Annual Southeastern Phycological Colloquy, Valdosta State University, Valdosta, Georgia, October 16 – 17, 2009.

 

On the centric diatom genus Cyclotella (Stephanodiscaceae, Bacillariophyta) in the coastal waters of the southeastern United States, including a new bloom-forming species – with A. K. S. K. Prasad.  Presented by A. K. S. K. Prasad at the 9th International Phycological Congress, Tokyo, Japan, August, 2009.

 

The attachment of diatoms to green coconut husks -- with  J. Trull. Presented by J. Trull at the 86th meeting of the Georgia Academy of Science, Spelman College, Atlanta, Georgia, April 3-4, 2009.

The centric diatom genus Cyclotella (Stephanodiscaceae, Bacillariophyta) from the coastal waters of Georgia -- A. K. S. K. Prasad. Presented by J at the 86th meeting of the Georgia Academy of Science, Spelman College, Atlanta, Georgia, April 3-4, 2009.

Observations on Phytoplankton Blooms in the northeastern Gulf of Mexico -- with A. K. S. K. Prasad and R. J.  Livingston.  Presented at the 30th Southeastern Phycological Colloquy, St. Augustine, Florida, October 24-25, 2008.

Long-term observations on phytoplankton blooms in the northeastern Gulf of Mexico -- with A. K. S. K. Prasad and R. J. Livingston .  Presented at the 1st Annual Choctawhatchee Bay Symposium, Destin, Florida, June 2, 2008.

A light and scanning electron microscopical study of the benthic diatom genus Plagiogramma Greville (Bacillariophyta) from coastal marine habitats of Florida, Georgia and Alabama -- with A. K. S. K. Prasad.  Presented at the 29th Annual Southeastern Phycological Colloquy, Dauphin Island, Alabama, October 26-27, 2007

A light and scanning electron microscope study of the marine diatom Neohuttonia reichardtii (Grunow) Kuntze (Triceratiaceae) -- with  A. K. S. K. Prasad. Presented at the 83rd Annual Meeting of the Georgia Academy of Science, at Georgia Perimeter College, Lawrenceville, Georgia, March 24-25, 2006

The marine diatom genus Pseudauliscus Schmidt: A light and electron microscopical  study of the diatoms P. peruvianus and P. radiatus from the northeastern Gulf of Mexico, with comments on  lectotypification and systematics -- with A.K.S.K. Prasad and K. A. Riddle.  Presented by A. K. S. K. Prasad at the XVII International Botanical Congress, Vienna, Austria, 2005 

New records of centric diatoms from Florida and Georgia, with special reference to the Thalassiosiraceae -- with A. K. S. K Prasad. Presented at the 17th North American Diatom Symposium, Islamorada, Florida, October 22-25, 2003

The diatom genus Cyclotella Kuetzing in the coastal waters of Florida and Georgia -- with A. K. S. K. Prasad. Presented at the 53rd Annual Meeting of the Phycological Society of America, held in conjunction with the XVIth International Botanical Congress, St. Louis, MO, 1999

The diatom genus Tryblioptychus Hendey: fine structure and systematics -- with A. K. S. K. Prasad.  Presented at the 52nd Annual Meeting of the Phycological Society of America, Flagstaff, AZ, 1998

Light and scanning electron microscope observations of an interesting synedroid diatom from  Florida Bay, USA -- with A. K. S. K. Prasad and Kim Riddle.  Presented at the 52nd Annual Meeting of the Phycological Society of America, Flagstaff, AZ, 1998