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Vieira C., O. Camacho, Z. Sun, S. Fredericq, F, Leliaert, C. Payri & O. De ClerckGlobal biogeography and diversification of the tropico-temperate brown algal genus Lobophora (Dictyotales, Phaeophyceae). Molecular Phylogenetics and Evolution (submitted).

Collin R., S. Fredericq, D.W. Freshwater, Edward Gilbert, Maycol Madrid, S. Maslakova, M.P. Miglietta, R. M. Rocha, E. Rodríguez & R.W. Thacker. 2016. TaxaGloss – A glossary and translation tool for biodiversity studies. Biodiversity Data Journal, (submitted).

Vieira-Pinto T., J.L. Richards, M.N. Sissini, S. Fredericq, P.A. Horta & M.C. Oliveira. 2016. Diversity of the shallow water Sporolithon (Sporolithales, Rhodophyta) from the South Atlantic coast. Phytotaxa (in revision).

Richards J.L., T. Vieira-Pinto, W.E. Schmidt, T. Sauvage, P.W. Gabrielson, M.C. Oliveira & S. Fredericq. 2016. Molecular and morphological diversity of Lithothamnion spp. rhodoliths (Hapalidiaceae, Hapalidiales) from deepwater rhodolith beds in the northwestern Gulf of Mexico. Phytotaxa 278: 81-114.

Gabriel D., S.G.A. Draisma, T. Sauvage, W.E. Schmidt, T. Schils, P.-E. Lim, D.J. Harris & S. Fredericq. 2016. Multilocus phylogeny reveals Gibsmithia hawaiiensis (Dumontiaceae, Rhodophyta), to be a species complex from the Indo-Pacific, with the proposal of G. eilatensis sp. nov. Phytotaxa 277:1-20.

Vieira C., O. Camacho, M. Wynne, L. Mattio, R. Anderson, J. Bolton, M. Sanson, S. D’hondt, F. Leliaert, S. Fredericq, C. Payri & O. De Clerk. 2016. Shedding new light on old algae: matching names and sequences in the brown algal genus Lobophora (Dictyotales, Phaeophyceae. Taxon 65: 689-707.

Fredericq S & W.E. Schmidt. 2016. Red Algae In: eLS, John Wiley & Sons Ltd, Chichester,; doi: 10.1002/9780470015902.a0000335.pub2

Leliaert F., A. Tronholm, C. Lemieux, M. Turmel, M.S. DePriest, S. Fredericq, F.W. Zechman & J. Lopez-Bautista. 2016. Chloroplast phylogenomic analyses reveal the deepest-branching lineage of the Chlorophyta, Palmophyllophyceae class. nov. Scientific Reports (Nature) 6:25367; doi:10.1038/srep25367

Jeong S.Y., B.Y. Won, S. Fredericq & T.O. Cho. 2016. Wynneophycus geminatus gen. et comb. nov. (Delesseriaceae, Rhodophyta) from Korea, based on the red alga previously known as Hypoglossum geminatum Okamura, with morphological evidence and LSU and rbcL sequences analyses. Phycologia 55: 165-177.

Sauvage T., W.E. Schmidt, S. Suda & S. Fredericq. 2016. A metabarcoding framework for facilitated survey of coral reef and rhodolith endolithic communities with tufA. BMC Ecology; doi:10.1111/jpy.12392-15-091

Krayesky-Self S., J.L. Richards, M. Rahmatian & S. Fredericq. 2016. Aragonite infill in overgrown conceptacles of coralline Lithothamnion spp. (Hapalidiaceae, Hapalidiales, Rhodophyta): new insights in biomineralization and phylomineralogy. Journal of Phycology 52: 161-173.

Yang E.C., S.M. Boo, D. Bhattacharya, G.W. Saunders, A.H. Knoll, S. Fredericq, L. Graf & H.S. Yoon. 2016. Divergence time estimates and evolution of major lineages in the florideophyte red algae. Scientific Reports (Nature) 6:21361, doi:10.1038/srep21361.

Schmidt W.E., C.F.D. Gurgel & S. Fredericq. 2016. Taxonomic transfer of the red algal genus Gloiosaccion to Chrysymenia (Rhodymeniaceae, Rhodymeniales), including the description of a new species, C. pseudoventricosa, for the Gulf of Mexico. Phytotaxa 243: 54-70.

Yang E.C., K.M. Kim, S.Y. Kim, J.M. Lee, H.H. Boo, J.-H. Lee, W.A. Nelson, G. Yi, W. Schmidt, S. Fredericq, S.M. Boo, D. Bhattacharya & H.S. Yoon. 2015. High conservation of mtDNA gene content and structure among multicellular red algae of the Florideophyceae. Genome Biology and Evolution 7: 2394-2406.

Gabriel D., W.E. Schmidt, D. Krayesky, D.J. Harris & S. Fredericq. 2015. The crustose red algal genus Peyssonnelia (Peyssonneliales, Rhodophyta) in the Azores: from five to one species. Arquipelago, Life and Marine Sciences 32: 1-9.

Arakaki N., W.E. Schmidt, P. Carbajal & S. Fredericq. 2015. First occurrence of Gracilaria chilensis, and distribution of Gracilariopsis lemaneiformis (Gracilariaceae, Gracilariales) in Peru. Phytotaxa 208: 175-181.

Camacho O., L. Mattio, S. Draisma, S. Fredericq & G. Diaz-Pulido. 2015. Morphological and molecular assessment of Sargassum (Fucales, Phaeophyceae) from Caribbean Colombia, including the proposal of S. giganteum sp. nov., Sargassum schnetteri comb. nov., and Sargassum section Cladophyllum sect. nov. Systematics and Biodiversity 13: 105-130.

Richards J.L,, W. Gabrielson & S. Fredericq. 2014. New insights into the genus Lithophyllum (Lithophylloideae, Corallinaceae, Corallinales) from offshore the NW Gulf of Mexico. Phytotaxa 190: 162-175.

Felder D.L., B.P. Thoma, W.E. Schmidt, T. Sauvage, S. Self-Krayesky, A. Chistoserdov, H. Bracken-Grissom & S. Fredericq. 2014. Seaweeds and decapod crustaceans on Gulf deep banks after the Macondo Oil Spill. Bioscience 64: 808-819.

Arakaki N., M. Suzuki & S. Fredericq. 2014. Halarachnion (Furcellariaceae, Rhodophyta), a newly reported genus for the Gulf of Mexico, with the description of H. louisianensis, sp. nov. Phycological Research 62: 306-315.

Sauvage T., M.J. Wynne, V.J. Paul & S. Fredericq. 2014. Morphological and molecular clarification of the enigmatic Caulerpa floridana W.R. Taylor (Chlorophyta, Bryopsidales) from the Dry Tortugas, Florida. European Journal of Phycology 49: 370-383.

Felder D., B. Thoma, W. Schmidt, T. Sauvage, S. Self-Krayesky, A. Chistoserdov, H. Bracken-Grissom & S. Fredericq. 2014. Seaweeds and decapod crustaceans on Gulf deep banks after the Macondo Oil Spill. Bioscience 64: 808-819.   

Fredericq S., N. Arakaki, O. Camacho, D. Gabriel, D. Krayesky, S. Self-Krayesky, G. Rees, J. Richards, T. Sauvage, D. Venera-Ponton & W.E. Schmidt. 2014. A dynamic approach to the study of rhodoliths: a case study for the Northwestern Gulf of Mexico. Cryptogamie Algologie 35: 77-98.

Sauvage T., P. Payri, S.G.A Draisma, W.F. Prud’homme van Reine, H. Verbruggen H., A. Sherwood & S. Fredericq. 2013. Molecular diversity of the Caulerpa racemosa-Caulerpa peltata complex (Caulerpaceae, Bryopsidales) in New Caledonia, with new Australasian records for C. racemosa var. cylindracea. Phycologia 52: 6-13.

Lin S.M., S. Fredericq & M. H. Hommersand. 2012. Developmental, phylogenetic and systematic studies of ApoglossumParaglossum and , Apoglosseae, trib. nov.European J. Phycology (Delesseriaceae, Rhodophyta). 47: 366-383

Sherwood A., O. Necchi, A. L. Carlile, D. D. Laughinghouse, S. Fredericq & R. G. Sheath. 2012. Characterization of a novel freshwater gigartinalean red alga from Belize, with a description of Sterrocladia belizeanaPhycologia sp. nov. (Rhodophyta). 51: 627-635

Krayesky D., J.N. Norris, J. West, M. Viguerie, B. Wysor & S. Fredericq. 2012. Two new species of Caloglossa (Delesseriaceae, Ceramiales) from the Americas, Caloglossa fluviatilis sp. nov. and Caloglossa neotropica sp. nov.  Phycologia 51:513-530. 

Arakaki N., K. Alveal, M.E. Ramirez & S. Fredericq. 2011. The genus Callophylllis (Kallymeniaceae, Rhodophyta) from the central-south Chilean coast (33o to 41o S), with the description of two new species. Revista Chilena de Historia Natural  84: 481-499.

Gabriel D., T. Schils, M.I. Parente, S.G.A. Draisma, A.I. Neto & S. Fredericq. 2011.  Taxonomic studies in the Schizymeniaceae (Nemastomatales, Rhodophyta): on the identity of SchizymeniaNemastoma confusum sp. in the Azores and the generic placement of .  Phycologia 50: 109-121.

Krayesky D.M., J.N. Norris, J.A. West & S. Fredericq.  2011The Caloglossa leprieurii complex (Delesseriaceae, Rhodophyta) in the Americas: the elucidation of overlooked species based on molecular and morphological evidence.  Cryptogamie, Algologie  32:37-62..

Won B.Y., K.K. Yates, S. Fredericq & T.O. Cho. 2010. Characterization of macroalgal epiphytes on Thalassia testudinum and Syringodium filiforme seagrass in Tampa Bay, Florida. Algae 25: 141-153.

Won B.Y. S. Fredericq & T.O. Cho. 2010. Two new species of Centroceras (Ceramiaceae, Rhodophyta) from KwaZulu-Natal, South Africa. European Journal of Phycology 45: 240-246.

Gabriel D., M.I. Parente, A.I. Neto, M. Raposo, T. Schils & S. Fredericq. 2010. A phylogenetic appraisal of the genus Platoma (Nemastomatales, Rhodophyta), including life history and morphological observations on P. cyclocolpum from the Azores. Phycologia 49: 2-21.

Hommersand MH., R.L. Moe, C.D. Amsler & S. Fredericq. 2009Notes on the systematics of Antarctic and subantarctic Rhodophyta with descriptions of four new genera and five new species. Botanica Marina 52: 509-534.

Lane A., L. Mular, E.J. Drenkard, T.L. Shearer, S. Engel, S. Fredericq, C.R. Fairchild, J. Prudhomme, K. Le Roch, M.E. Hay, W. Aalbersberg & J. Kubanek. 2009.  Ecological leads for natural product discovery: novel sesquiterpene hydroquinones from the red macroalga Peyssonnelia sp. Tetrahedron 66: 455-461.

Won, B.Y., T.O. Cho & S. Fredericq. 2009. Morphological and molecular characterization of species of Centroceras Kützing, including two new species (Ceramiaceae, Ceramiales).  Journal of Phycology 45: 45: 227-50.

Fredericq S., T.O. Cho, S.A. Earle, C. F. Gurgel, D.M. Krayesky, L.E. Mateo Cid, A.C. Mendoza Gonzáles, J.N. Norris & A.M. Suárez. 2009. Seaweeds of the Gulf of Mexico. In: D. L. Felder & D. K. Camp, eds. Gulf of Mexico: Its Origins, Waters, and Biota. I.  Biodiversity, pp. 187-259. Texas A&M Univ. Press.

Krayesky D.M., E. Meave del Castillo, E. Zamudio, J. N. Norris and S. Fredericq. 2009. Diatoms (Bacillariophyta) of the Gulf of Mexico. D. L. Felder & D. K. Camp, eds. Gulf of Mexico: Its Origins, Waters, and Biota. I.  Biodiversity, pp. 155-185. Texas A&M Univ. Press.

Krayesky D.M., J.N. Norris, P.W. Gabrielson, D. Gabriel & S. Fredericq. 2009. A new order of crustose red algae based on the Peyssonneliaceae. with an evaluation of the ordinal classification of the Florideophyceae (Rhodophyta).  Proceedings Biological Society of Washington 123: 364-91.

Gabriel D., T. Schils, A.I. Neto, L. Paramio, T. Schils & S. Fredericq. 2009. Predaea feldmannii subsp. azorica (Nemastomataceae, nemastomatales), a new subspecies of red algae (Rhodophyta) from the Azores. Cryptogamie, Algologie 30: 251-70.

Lin S.-M., M.H. Hommersand, S. Fredericq & O. De Clerck. 2009. Characterization of Martensia (Delesseriaceae, Rhodophyta) based on a morphological and molecular study of the type species, M. elegans Hering and M. natalensis sp. nov. from South Africa.  Journal of Phycology 45: 678-91.

Cho T.O., M.H. Hommersand, B.Y. Won & S. Fredericq. 2008. Generic boundaries and phylogeny of Campylaephora (Ceramiaceae, Rhodophyta), including Campylaephora californica (Farlow) comb. nov.  Phycologia 47: 321-33.

Gurgel  C.F.D., S. Fredericq, J.N. Norris & Y. Yoneshigue-Valentin. 2008. Two new flat species of Gracilaria (Gracilariales, Rhodophyta) from Brazil: G. abyssalis and G. brasiliensis.  Phycologia 47: 249-64.

Cho T.O., S.M. Boo, M.H. Hommersand, C.A. Maggs, L. McIvor & S. Fredericq. 2008. Gayliella gen. nov. in the tribe Ceramieae (Ceramiaceae, Rhodophyta) based on molecular and morphological evidence. Journal of Phycology 44: 721-38.

Hommersand M.H., D.W. Freshwater, J. Lopez Bautista & S. Fredericq.2006. Proposal of the Euptiloteae Hommersand and Fredericq, Trib. Nov., and transfer of some Southern Hemisphere Ptiloteae to the Callithamnieae (Rhodophyta).  Journal of Phycology 42: 203-25.

N’Yeurt A.D.R., C.E. Payri, P.W. Gabrielson & S. Fredericq. 2006. Pinnatiphycus menouana gen et sp. nov. (Rhodophyta: Dicranemataceae) from New Caledonia and Fiji (South Pacific): vegetative and reproductive morphology and molecular phylogeny.  Phycologia 45: 422–31.

Fujii M.T., Guimarães S.M.P.B., C.F.D. Gurgel & S. Fredericq. 2006. Characterization and phylogenetic affinities of the red alga Chondrophycus flagelliferus (Rhodomelaceae, Ceramiales) from Brazil based on morphological and molecular evidence. Phycologia 45: 432-41.

Cho T.O. & S. Fredericq. 2006. Two creeping Ceramium species from the Florida Keys: C. pseudoperiaxiale sp. nov., and a recircumscription of C. codii (Richards) Mazoyer (Ceramiaceae, Rhodophyta).  Phycologia 45: 495-504.

Thomsen M.S., C.F.D. Gurgel, S. Fredericq & K. J. McGlathery. 2006. Note: Gracilaria vermiculophylla (Rhodophyta, Gracilariales) in Hog Bay, Virginia: a cryptic alien and invasive macroalga, and taxonomic correction.  Journal of Phycology 42: 139-41.

Mateo-Cid L.E., Mendoza-Gonzales A.C., B. Gavio & S. Fredericq. 2005. Grateloupia huertana sp. nov. (Halymeniaceae, Rhodophyta): a peculiar new prostrate species from tropical Pacific Mexico.  Phycologia 44: 4-16.

De Clerck O., B. Gavio, S. Fredericq, I. Barbara, E. Coppejans. 2005. Systematics of Grateloupia filicina (Halymeniaceae, Rhodophyta), based on rbcL sequence analyses and morphological evidence, including the reinstatement of G. minima and the description of G. capensis sp. nov.  Journal of Phycology 42: 391-411.

De Clerck O., B. Gavio B., S. Fredericq S., E. Cocquyt & E. Coppejans. 2005. Systematic reassessment of the red algal genus Phyllymenia (Halymeniaceae, Rhodophyta) .  European Journal of Phycology 44: 1-10.

Adl S.M., A. G.B. Simpson, M.A. Farmer, R.A. Andersen, R.A. Anderson, J. Barta, Samuel Bowser, G. Brugerolle, R. Fensome, S. Fredericq, T.Y. James, S. Karpov, P. Kugrens, J.Krug, C. Lane, L.A. Lewis, Jean Lodge, D.H. Lynn, D. Mann, R.M. McCourt, L. Mendoza, Ø. Moestrup, S.E. Mozeley-Standridge, T.A. Nerad, C. Shearer, F. Spiegel, M. F.J.R. Taylor. 2005. The new higher level classification of eukaryotes and taxonomy of protists.  Journal of Eukaryotic Microbiology 52: 399-432.

Gavio B., E. Hickerson & S. Fredericq. 2005. Platoma chrysymenioides sp. nov. (Schizymeniaceae), and Sebdenia integra sp. nov. (Sebdeniaceae), two new red algal species from the northwestern Gulf of Mexico, with a phylogenetic assessment of the Cryptonemiales complex (Rhodophyta).  Gulf of Mexico Science 23: 38-57.

Gavio B. & S. Fredericq. 2005. New species and new records of offshore members of the Rhodymeniales (Rhodophyta) in the northern Gulf of Mexico. Gulf of Mexico Science 23: 58-83.

Cho T.O., B.Y. Won & S. Fredericq. 2005. Antithamnion nipponicum (Ceramiaceae, Rhodophyta), incorrectly known as A. pectinatum in Western Europe, is a recent introduction along the North Carolina and Pacific coasts of North America.  European Journal of Phycology 44: 323-35.

Gurgel C.F. & S. Fredericq. 2004. Systematics of the Gracilariaceae (Gracilariales, Rhodophyta): a critical assessment based on rbcL sequence analysis.  Journal of Phycology 40: 139-59.

Lin S.M., M.H. Hommersand & S. Fredericq. 2004. Two new species of Martensia (Delesseriaceae, Rhodophyta) from Kenting National Park, southern Taiwan.  Phycologia 43: 13-25.

Gurgel C.F.D., S. Fredericq & J.N. Norris. 2004. Molecular systematics and taxonomy of flattened species of Gracilaria Greville (Gracilariaceae, Gracilariales, Rhodophyta) from the Western Atlantic, in: I.A. Abbott & K. McDermid, Eds, Taxonomy of Economic Seaweeds IX (with reference to the Pacific and other locations, pp. 159-99.

Gurgel C.F.D, S. Fredericq & J.N. Norris. 2004. Phylogeography of Gracilaria tikvahiae (Gracilariaceae, Rhodophyta): a study of genetic discontinuity in a continuously distributed species based on molecular evidence.  Journal of Phycology 40: 748-58.

Gurgel C.F., S. Fredericq & J.N. Norris. 2004. Gracilaria apiculata and G. flabelliformis (Gracilariaceae, Rhodophyta): restoring old names for common tropical western Atlantic species, including the recognition of three new subspecies, and a replacement name for “G. lacinulata”.  Cryptogamie, Algologie 25: 367-96.

Lin S.M., S. Fredericq & M.H. Hommersand. 2004. Augophyllum, a new genus of the Delesseriaceae (Rhodophyta) based on rbcL sequence analysis and cystocarp development.  Journal of Phycology 40: 962-76.

Cho T.O., S.M. Boo, J.N. Norris & S. Fredericq. 2004. Rhizoidal cortication in the genus Ceramium (Ceramiaceae, Ceramiales): two developmental patterns. Cryptogamie, Algologie 25: 397-407.

Fredericq S., R.J. Anderson & J. Lopez-Bautista. 2003. Systematic circumscription of some Phyllophoraceae (Gigartinales, Rhodophyta) from the Cape region, South Africa, based on molecular evidence.  Proceedings XVIIth International Seaweed Symposium, pp. 263-74. Oxford University Press.

Hommersand M.H. & S. Fredericq. 2003. Biogeography of the red seaweeds of the South African west coast: a molecular approach.  Proceedings XVIIth International Seaweed Symposium, pp. 325-36. Oxford University Press.

Gurgel C.F., L. Liao, S. Fredericq & M.H. Hommersand. 2003. Systematics of Gracilariopsis Dawson (Gracilariales, Rhodophyta) based on rbcL sequence analysis and morphological evidence.  Journal of Phycology 39: 154-71.

Cho T.O., S. Fredericq & S.M. Boo. 2003. Ceramium inkyuii, sp. nov. (Ceramiaceae, Rhodophyta) from Korea: a new species based on morphological and molecular evidence.  Journal of Phycology 39: 237-47.

Gurgel C.F., S. Fredericq & J.N. Norris. 2003. Gracilariopsis silvana, G. hommersandii and G. cata-luziana, three new species of Gracilariaceae (Gracilariales, Rhodophyta) from the Western Atlantic. Hidrobiológica 13: 53-64.

Lin S.M. & S. Fredericq. 2003. Nitophyllum hommersandii sp. nov. (Delesseriaceae, Rhodophyta) from Taiwan.  European Journal of Phycology 38: 38: 143-51.

Cho T.O., S. Fredericq, S.N. Murray & S.M. Boo. 2003. New insights in the taxonomy of the Ceramium sinicola complex: resurrection of Ceramium interruptum (Ceramiaceae, Rhodophyta).  Journal of Phycology 39: 775-88.

Gavio B. & S. Fredericq. 2003. Botryocladia caraibica (Rhodymeniaceae, Rhodymeniales), a new species from the Caribbean.  Cryptogamie Algologie 24: 93-106.

Lindstrom S.C. & S. Fredericq. 2003. Systematic relationships among northeast Pacific species of Porphyra (Bangiales, Rhodophyta) revealed by rbcL sequence data.  Phycological Research 51: 211-24.

Lin S.-M, J.E. Lewis & S. Fredericq. 2002. Drachiella liaoii sp. nov., a new member of the Schizoserideae (Delesseriaceae, Rhodophyta) from Taiwan and the Philippines.  European Journal of Phycology 37: 93-102.

Gavio B. & S. Fredericq. 2002. Grateloupia turuturu (Halymeniaceae, Rhodophyta) is the correct name of the non-native species in the Atlantic known as Grateloupia doryphoraEuropean Journal of Phycology 37: 349-60.

Fredericq S., J. &  J. Lopez-Bautista. 2002. Characterization and phylogenetic position of the red alga Besa papillaeformis Setchell: an example of progenetic heterochrony?  (Constancea 83, the online continuation of University of California Publications in Botany (1902-2002) (special Festschrift to honor P.C. Silva. 

Lin S.-M, Fredericq S. & M.H. Hommersand. 2001. Systematics of the Delesseriaceae (Ceramiales, Rhodophyta) based on LSU rDNA and rbcL sequences, including the Phycodryoideae, subfam. nov.  Journal of Phycology 37: 881-99.

Lin S.-M., S. Fredericq & L Liao. 2001. Neotypification and taxonomic status of Opephyllum martensii Schmitz in Schmitz et Hauptfleisch (Delesseriaceae, Rhodophyta) from Zamboanga, southern Philippines.  Botanica Marina 44: 589-95.

Phillips N. & S. Fredericq. 2000. Phylogenetic and biogeographic investigations of the pantropical algal genus Sargassum (Fucales, Phaeophyceae) with relevance to the Gulf of Mexico.  Gulf of Mexico Science 2000 (2): 77-87.

Fredericq S., N. Phillips & B. Gavio. 2000. Observations of the macroalgae inhabiting deep-water hard bank communities in the Northwestern Gulf of Mexico. Gulf of Mexico Science 2000(2): 88-96.         

Hommersand M.H., Fredericq S., Freshwater D.W. & J. Hughey. 1999. Recent developments in the systematics of the Gigartinaceae (Gigartinales, Rhodophyta) based on rbcL sequence analysis and morphological evidence. Phycological Research 47: 139-52.

Freshwater, D.W., Fredericq S. & C.J. Bailey. 1999. Characteristics and utility of nuclear-encoded large-ribosomal subunit gene sequences in phylogenetic studies of red algae.  Phycological Research 47:33-8. 

 Fredericq S., D.W. Freshwater & M.H. Hommersand. 1999. Observations on the   phylogenetic systematics and biogeography of the Solieriaceae (Rhodophyta, Gigartinales) inferred from rbcL sequences and morphological evidence. Hydrobiologia 398-399: 25-38.

Hommersand M.H. & S. Fredericq. 1997. Characterization of Myriogramme livida, Myriogrammeae trib. nov. (Delesseriaceae, Rhodophyta).  Journal of Phycology 33: 106-21.

Hommersand M.H. & S. Fredericq. 1997. Characterization of Schizoseris condensata, Schizoserideae trib. nov. (Delesseriaceae, Rhodophyta).  Journal of Phycology 33: 475-90.

Hommersand M.H. & S. Fredericq. 1996. Vegetative and reproductive development in Pterocladia capillacea  (Gelidiales, Rhodophyta) from La Jolla, California. Nova Hedwigia 112: 145-58.

 Fredericq S., M.H. Hommersand & D.W. Freshwater. 1996. The molecular systematics of some agar-and carrageenan-containing marine red algae based on rbcL sequence analysis.  Proceedings XVth int. Seaweed Symp.  Hydrobiologia 326/327: 125-235.

Fredericq S. & M.E. Ramírez. 1996. Systematic studies of the antarctic species of the Phyllophoraceae (Gigartinales, Rhodophyta) based on rbcL sequence analysis. Proceedings XVth int. Seaweed Symp.  Hydrobiologia 326/327: 137-43.

 Freshwater D.W., Fredericq S. & M.H. Hommersand. 1995. A molecular phylogeny of the Gelidiales (Rhodophyta) based on analysis of plastid rbcL nucleotide sequences.  Journal of Phycology 31: 616-32.

 Fredericq S. & J.N. Norris. 1995. A new order (Rhodogorgonales) and family (Rhodogorgonaceae)  of red algae, which includes two calciferous tropical genera, Renouxia gen nov. and RhodogorgonCryptogamic Botany 5: 316-31.

Hommersand M.H., Fredericq S. & Freshwater D.W. 1994. Phylogenetic systematics and biogeography of the Gigartinaceae (Gigartinales, Rhodo-phyta) based on sequence analysis of rbcL.  Botanica Marina 37: 193-203.

Freshwater D.W., Fredericq S., Butler B.S., Hommersand M.H. & Chase M.W.  1994.  A gene phylogeny of the Red Algae (Rhodophyta) based on plastid rbcL sequences. Proceedings National Academy of Sciences 91: 7281-5.

Hommersand M.H., Guiry M.D., Fredericq S. & Leister G.L. 1993. New perspectives in the taxonomy of the Gigartinaceae (Gigartinales). Hydrobiologia 260/261: 105-20.

Fredericq S., M.H. Hommersand & G.L. Leister. 1992. Morphology and systematics of Acanthococcus antarcticus Hooker et Harvey (Cystocloniaceae, Rhodophyta).  Phycologia 31: 101-18.

Fredericq S. & J.N. Norris. 1992. Studies on cylindrical species of Western Atlantic Gracilaria (Gracilariales, Rhodophyta): G. cylindrica BØrgesen and G. blodgettii Harvey. In: "Taxonomy of Economic Seaweeds III", I.A. Abbott [Ed.], pp. 211-31.

Hommersand M.H., Fredericq S. & Cabioch J. 1992. Developmental morphology of Gigartina pistillata (Gigartinaceae, Gigartinales).  Phycologia 31: 300-25.

Fredericq S., Brodie J. & Hommersand M.H. 1992. Developmental morphology of Chondrus crispus (Gigartinaceae, Rhodophyta).  Phycologia 31: 542-63.

Fredericq S., E. Serrão E. & J.N. Norris. 1992. New records of marine red algae from the Azores.  Arquipelago, Life and Earth Sciences 10: 1-5.

Fredericq S. & M.H. Hommersand. 1990. Morphology and systematics of Holmsella pachyderma (Pterocladiophilaceae, Gracilariales).  British Phycological Journal 25: 39-51.

Fredericq S. & M.H. Hommersand. 1990. Taxonomy of Melanthalia  obtusata var. abscissa and its placement in the Gracilariales (Rhodophyta).  Cryptogamic Botany 2: 39-51.

Fredericq S. & M.H. Hommersand. 1990. Diagnoses and key to the genera of the Gracilariaceae (Gracilariales, Rhodophyta).  Hydrobiologia 204/205: 173-8.

Hommersand M.H. &  S. Fredericq. 1990. Sexual Reproduction and Cystocarp Development. Pp. 305-45.  In: Biology of the Red Algae. Cole K.M. & R.G. Sheath [Eds].  Cambridge University Press.     

Fredericq S. & M.H. Hommersand. 1989. Proposal of the Gracilariales, ord. nov. (Rhodophyta) based on an analysis of the reproductive development of Gracilaria verrucosa.  Journal of Phycology 25: 213-27.

Fredericq S. & M.H. Hommersand. 1989. The comparative morphology and taxonomic status of Gracilariopsis (Gracilariales, Rhodophyta).  Journal of  Phycology 25: 228-43.

Fredericq S., M.H. Hommersand & J.N. Norris. 1989. Morphological observations on the adelphoparasite Gracilariophila oryzoides (Gracilariales, Rhodophya).  Japanese Journal of Phycology 37: 167-79.

Fredericq S. & M.H. Hommersand. 1989. Reproductive morphology and development of the cystocarp in Curdiea flabellata Chapman (Gracilariales, Rhodophyta).  New Zealand Journal of Botany 27: 21-530.

Hommersand M.H. & Fredericq S. 1988. An investigation of cystocarp development in Gelidium pteridifolium with a revised description of the Gelidiales (Rhodophyta).  Phycologia 27: 254-72.

Norris R.E., Hommersand M.H. & S. Fredericq. 1987. Gelidium pteridifolium (Rhodophyceae), a new species from Natal and the eastern Cape.  South African Journal of Botany 53: 375-80.  

Fredericq S. & J.N. Norris. 1986. The structure and reproduction of Dasya haitiana, sp. nov. (Dasyaceae, Rhodophyta) from the Caribbean Sea.  Phycologia 25: 185-96.         

Fredericq S. & J.N. Norris. 1985. Morphological  studies on some tropical species of Gracilaria Grev. (Gracilariaceae, Rhodophyta): Taxonomic concepts based on reproductive morphology. Pp. 137-55, in Abbott I.A. & Norris J.N. [eds.], Taxonomy of Economic Seaweeds (with reference to some Pacific and Caribbean species). California Sea Grant Program, University of California, La Jolla. xvi+167 pp.

Abbott I.A., Chiang Y.M., Fredericq S., Norris J.N., Tsuda R.T., Xia B. & N. Yamamoto.  1985.  The red alga Gracilaria Greville (Gracilariaceae, Gigartinales): Introduction. Pp. 67-8 in Abbott I.A. & Norris J.N. [Eds.], Taxonomy of Economic Seaweeds (with reference to some Pacific and Caribbean species).  California Sea Grant Program, University of California, La Jolla. xvi+167 pp.


Fredericq et al. 2008 and 2009. Co-producer of “Field guide to the common marine algae of the Bocas del Toro Area” by class participants (STRI, Panama).

Fredericq S. 2003. Book Review of “Antarctic Seaweeds” by C. Wiencke & M.N. Clayton for Antarctic Science 15:315-6.

Fredericq S. 2001. Elegance, a “brief, perfectly balanced instant of complete possession of forms, pp. 14-19.  In: Elegance: Beauty and Truth, edited by Lewis Pyenson (Lafayette: Center for Louisiana Studies, 2001) [Publications of the Graduate School, New Series, vol. 2].

Fredericq S.  2000. Tyge Christensen Prize for 2000.  Phycologia 6: p. 56



dept. biology, university of louisiana at Lafayette, Lafayette LA 70504-3601;  tel: 337/482-1291 & 482-5057