Description and distribution of Nemacystus howei (W.R. Taylor) Kylin (Chordariaceae) from the northern coast of the Yucatán peninsula

keywords: Cladosiphon, Gulf of Mexico, morphology, Phaeophyceae

Abstract

Background: There are few studies about Nemacystus on the Atlantic coast, and N. howei has been reported only once for Mexico; that record, however, did not provide a description of this species.

Question: What are the morphological characteristics of Nemacystus howei and its distribution on the Yucatan coast?

Species study: Macroalgae, Phaeophyceae, Nemacystus howei.

Study site and year of study: North coast of Yucatán Peninsula of Mexico. Dry and rainy seasons from 2017 to 2019.

Methods: Sampling was carried out at five localities, at 5 and 10 m depths, with scuba equipment. Specimens were preserved in diluted formalin in sea water; silica gel and dried-pressed vouchers are housed at the UADY

Results: Six samples were collected at the five localities. Each one contains a small mass of filamentous of specimens of Nemacystus howei, that were found only during dry season, at both depths sampled. This alga has a thallus of an entangled filamentous mass of cylindrical, mucilaginous axes, of a light brown color. Younger branches have a solid central axis. Branching is abundant. The main, older axes are hollow. The assimilatory filaments are branched a few times, producing uniseriate colorless hairs and with plurilocular sporangia arising from the base. Nemacystus howei is easily confused with Cladosiphon occidentalis Kylin due to their similar morphology, branching pattern, and size.

Conclusion: The significant morphological similarities between these species as well as the paucity of specific works on the Phaeophyceae of the Yucatan Peninsula may explain why Nemacystus howei had not been previously reported.

Downloads

Download data is not yet available.

Author Biographies

Ileana Ortegón-Aznar, Universidad Autonoma de Yucatan

Profesor de Carrera Titular "C". T.C.  Departamento de Biología Marina, Universidad Autónoma de Yucatan. Km 15.5 Carretera Merida-Xmatkuil A.P 4-116 Itzimna Mérida, Yucatán. México.

Ana M. Suárez, Universidad de la Habana. La Habana, Cuba

Centro de Investigaciones Marinas,  Profesor Emerito

María del Carmen Galindo-de Santiago , Universidad Nacional Autónoma de México, Yucatán, México

Escuela Nacional de Estudios Superiores-Unidad Mérida-UNAM, Ucú, Yucatán, México  

, Yucatán, México . Profesor. 

Michael J. Wynne, University of Michigan, Ann Arbor, MI, USA.

Department of Ecology and Evolutionary Biology and Herbarium,

Emeritus Professor
Description and distribution of Nemacystus howei (W.R. Taylor) Kylin (Chordariaceae) from the northern coast of the Yucatán peninsula

References

Cassano V, de G. Pedrini A. 1993. Nemacystus howei (Taylor) Kylin (Phaeophyta, Spermatochnaceae): nova referéncia para a flora marinha Atlántica Sul-Americana. Hoehnea 20: 93-100.
Dawes CJ, Mathieson AC. 2008. The seaweeds of Florida. University Press of Florida Gainesville, Florida. pp 591. ISBN: 978-0-8130-3148-4
Earle SA. 1969. Phaeophyta of the eastern Gulf of Mexico. Phycologia, 7(2): 71–254.
Fredericq S, Cho TO, Earle SA, Gurgel CF Krayesky DM Mateo-Cid LE, Mendoza-González AC, Norris JN, Suárez AM. 2009. Seaweeds of the Gulf of Mexico, In Felder, D.L. and D.K. Camp, eds. Gulf of Mexico–Origins, Waters, and Biota. I. Biodiversity, pp. 187-259. Texas A&M Press, College Station, Texas. ISBN-13: 978-1603440943
Guiry MD, Guiry, GM. 2020. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org (accesed April 14, 2020).
Jong YSDM de, Prud'homme van Reine WF. 1997. A review of the genus Nemacystus (Spermatochnaceae, Chordariales, Phaeophyceae), including phylogenetic and biogeographical hypothesis. Nova Hedwigia 64: 1-40.
Kylin H. 1940. Die Phaeophyceenordnung Chordariales. Acta Universitatis Lundensis 36(9): 1-67.
Mateo-Cid LE., Mendoza-González C, Fredericq S. 2013. Lista de algas marinas submareales de los bancos de Campeche, México. Acta Bot. Venez. 36 (2): 95-108. DOI: https://doi.org/10.21829/abm104.2013.57
Menezes Széchy MT, Paula JC. 2010. Phaeophyceae. In: Forzza RC, ed. Catálogo de plantas e fungos do Brasil. Vol. 1. pp. 404-408. Rio de Janeiro: Andrea Jakobsson Estúdio; Instituto de Pesquisas Jardim Botânico do Rio de Janeiro. ISBN: 978-85-88742-42-0.
Norris JN. 2010. Marine algae of the Northern Gulf of California: Chlorophyta and Phaeophyceae. Smithsonian Contributions to Botany 94: 1-276. ISSN: (print) 0081-024X.
Pedroche PF, Silva PC, Aguilar Rosas LE, Dreckmann KM, Aguilar Rosas R. 2008. Catálogo de las algas benthónicas del Pacífico de México II. Phaeophycota. pp. 15-146. Universidad Autónoma Metropolitana. ISBN: 978-970-31-0909-8 (v.2).
Phillips RC, Springer VG. 1960. Observations on the offshore benthic flora in the Gulf of Mexico off Pinellas County, Florida. American Midland Naturalist 64: 362–381.
Schneider CW. 2003. An annotated checklist and bibliography of the marine macroalgae of the Bermuda Islands. Nova Hedwigia 76: 275-361. DOI: 10.1127/0029-5035/2003/0076-0275
Schneider CW, Searles RB. 1975. North Carolina marine algae, IV. Further contribution from the continental shelf, including two new species of Rhodophyta. Nova Hedwigia 26:83-103.
Schneider CW, Searles RB. 1991. Seaweeds of the southeastern United States. Cape Hatteras to Cape Canaveral. pp. 563. Durham & London: Duke University Press.ISBN: 0-8223-1101-1.
Taylor WR. 1928. The marine algae of Florida with special reference to the Dry Tortugas. Pp 1- 379.Publications of the Carnegie Institution of Washington.
Taylor WR. 1960. Marine algae of the eastern tropical and subtropical coasts of the Americas. pp. 1-870. Ann Arbor: The University of Michigan Press.
Vroman M, and H. Stegenga. 1988. An annotated checklist of the marine algae of the Caribbean islands of Aruba and Bonaire. Nova Hedwigia 46:433-480.
Published
2020-10-27
How to Cite
Ortegón-AznarI., SuárezA. M., Galindo-de Santiago M. del C., & WynneM. J. (2020). Description and distribution of Nemacystus howei (W.R. Taylor) Kylin (Chordariaceae) from the northern coast of the Yucatán peninsula. Botanical Sciences, 99(1), 161-168. https://doi.org/10.17129/botsci.2667
Section
TAXONOMY AND FLORISTICS / TAXONOMÍA Y FLORÍSTICA