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Padina mexicana. Heterotypic synonym: Padina crispata Morphology and anatomy of vegetative structures from the isotype (MICH). Fig. 24. Plant morphology showing the overlapping arrangement of the thallus in a prostrate growth form. Scale bar = 1 cm. Fig. 25. Longitudinal section from the basal part showing five medullary cell layers and one cortical cell layer (arrow) in the lower portion. Scale bar = 30 µm.
Source publication
A monographic reassessment of Padina Adanson species from the Gulf of California was developed based on an exhaustive review of the character and characters states that have been used to delimit species in recent and historically valuable collections. Eight names (P. caulescens Thivy in Taylor, P. concrescens Thivy in Taylor, P. crispata Thivy in T...
Context in source publication
Context 1
... Thallus growth form erect or prostrate, height 50-150 mm and width 50-200 mm, and when pros- trate has secondary holdfast (Fig. 31). Calcification pre- sent on both sides (Figs 21, 24, 26-29). Reproductive structures arranged in sori over superficial areas on one or both sides. Anatomically, thallus composed of layers of cells reducing in number from basal to apical areas, medullary cells 4-9 layers in the basal area (Figs 22, 30), and two in the apical portion, length 30-35 µm and width 10-15; one or two layers of cortical cells along the thallus (Figs 22, 25, 30), length 30-35 µm and width 20-25 µm. Thallus dioeciously, reproductive structures borne from cortical cells and organized in sori; sporangial sori ( Figs 23, 33) width 220-230 µm, composed of rounded sporan- gia length 55-60 µm and width 40-45 µm; Oogonial sori ( Fig. 20) width 220 µm, composed of ovate oogonia, length 50-55 µm and width 40-45 µm; Male gameto- phytes not ...
Citations
... Although Riosmena-Rodríguez et al. (2009) Remarks. Dawson et al. (1964:22) suspected the type locality of P. durvillei was incorrect, noting "from the present known distribution of the species it is questionable whether the alga was taken from such cool southern waters." ...
... mexicana. It was treated as a synonym of P. mexicana by Riosmena-Rodríguez et al. (2009). Subsequently, Díaz-Martínez et al. (2016) found no genetic differences between the two varieties and recognized them as morphological varieties. ...
... Ávila-Ortiz and Pedroche (2005) found that tropical Pacific Mexico specimens identified as "Padina gymnospora" were either P. crispata or P. mexicana and noted P. gymnospora should be applied only to material from the Atlantic. Riosmena-Rodríguez et al. (2009) also concluded Gulf of California records of "P. gymnospora" and "P. ...
The present treatment constitutes an undated, annotated, systematic review of red, brown, and green benthic marine algae of the Gulf of California, Mexico, using the currently accepted taxon names, with the date and place of valid publication, type locality, and north to south distribution in the Gulf. The systematic list contains 730 species recognized in the Gulf of California, including 490 species of Rhodophyta, 112 species of Phaeophyceae, and 128 species of Chlorophyta. Among the previously recorded marine algae, 39 species are considered uncertain records or to have uncertain taxonomic status, the selection of a lectotype for Gracilaria hancockii resolves its taxonomic status, 3 combinations are made for recognized varieties of Caulerpa chemnitzia, and 15 species are excluded from the Gulf of California marine flora. The geographical distribution range of each species is given from its northernmost to southernmost locales within three regions the Gulf of California: the east coast of the Gulf (states of Sonora, Sinaloa, Nayarit, and northern Jalisco), the west coast of the Gulf (states of Baja California and Baja California Sur), the islands of the Gulf, including the Islas Grandes (=Islas de la Cintura; Midriff Islands), and islands of the states of Baja California, Baja California Sur, Sonora, Sinaloa, Nayarit, and northern Jalisco. Remarks, where appropriate, are included on taxonomy, nomenclature, ecology, and/or distribution with the taxon.
... Although Riosmena-Rodríguez et al. (2009) Remarks. Dawson et al. (1964:22) suspected the type locality of P. durvillei was incorrect, noting "from the present known distribution of the species it is questionable whether the alga was taken from such cool southern waters." ...
... mexicana. It was treated as a synonym of P. mexicana by Riosmena-Rodríguez et al. (2009). Subsequently, Díaz-Martínez et al. (2016) found no genetic differences between the two varieties and recognized them as morphological varieties. ...
... Ávila-Ortiz and Pedroche (2005) found that tropical Pacific Mexico specimens identified as "Padina gymnospora" were either P. crispata or P. mexicana and noted P. gymnospora should be applied only to material from the Atlantic. Riosmena-Rodríguez et al. (2009) also concluded Gulf of California records of "P. gymnospora" and "P. ...
The present treatment constitutes an undated, annotated, systematic review of red, brown, and green benthic marine algae of the Gulf of California, Mexico, using the currently accepted taxon names, with the date and place of valid publication, type locality, and north to south distribution in the Gulf. The systematic list contains 730 species recognized in the Gulf of California, including 490 species of Rhodophyta, 112 species of Phaeophyceae, and 128 species of Chlorophyta. Among the previously recorded marine algae, 39 species are considered uncertain records or to have uncertain taxonomic status, the selection of a lectotype for Gracilaria hancockii resolves its taxonomic status, 3 combinations are made for recognized varieties of Caulerpa chemnitzia, and 15 species are excluded from the Gulf of California marine flora. The geographical distribution range of each species is given from its northernmost to southernmost locales within three regions the Gulf of California: the east coast of the Gulf (states of Sonora, Sinaloa, Nayarit, and northern Jalisco), the west coast of the Gulf (states of Baja California and Baja California Sur), the islands of the Gulf, including the Islas Grandes (=Islas de la Cintura; Midriff Islands), and islands of the states of Baja California, Baja California Sur, Sonora, Sinaloa, Nayarit, and northern Jalisco. Remarks, where appropriate, are included on taxonomy, nomenclature, ecology, and/or distribution with the taxon.
... Although Riosmena-Rodríguez et al. (2009) Remarks. Dawson et al. (1964:22) suspected the type locality of P. durvillei was incorrect, noting "from the present known distribution of the species it is questionable whether the alga was taken from such cool southern waters." ...
... mexicana. It was treated as a synonym of P. mexicana by Riosmena-Rodríguez et al. (2009). Subsequently, Díaz-Martínez et al. (2016) found no genetic differences between the two varieties and recognized them as morphological varieties. ...
... Ávila-Ortiz and Pedroche (2005) found that tropical Pacific Mexico specimens identified as "Padina gymnospora" were either P. crispata or P. mexicana and noted P. gymnospora should be applied only to material from the Atlantic. Riosmena-Rodríguez et al. (2009) also concluded Gulf of California records of "P. gymnospora" and "P. ...
Norris, James N., Luis E. Aguilar-Rosas, and Francisco F. Pedroche. Conspectus of the Benthic Marine Algae of the Gulf of California: Rhodophyta, Phaeophyceae, and Chlorophyta. Smithsonian Contributions to Botany, number 106, vi +125 pages, 5 figures, 1 table, 1 appendix, 2017. — The present treatment constitutes an undated, annotated, systematic review of red, brown, and green benthic marine algae of the Gulf of California, Mexico, using the currently accepted taxon names, with the date and place of valid publication, type locality, and north to south distribution in the Gulf. The systematic list contains 730 species recognized in the Gulf of California, including 490 species of Rhodophyta, 112 species of Phaeophyceae, and 128 species of Chlorophyta. Among the previously recorded marine algae, 39 species are considered uncertain records or to have uncertain taxonomic status, the selection of a lectotype for Gracilaria hancockii resolves its taxonomic status, 3 combinations are made for recognized varieties of Caulerpa chemnitzia, and 15 species are excluded
from the Gulf of California marine flora. The geographical distribution range of each species is given from its northernmost to southernmost locales within three regions the Gulf of California: the east coast of the Gulf (states of Sonora, Sinaloa, Nayarit, and northern Jalisco), the west coast of the Gulf (states of Baja California and Baja California Sur), the islands of the Gulf, including the Islas Grandes (=Islas de la Cintura; Midriff Islands), and islands of the states of Baja California, Baja California Sur, Sonora, Sinaloa, Nayarit, and northern Jalisco. Remarks, where appropriate, are included on taxonomy, nomenclature, ecology, and/or distribution with the taxon .s m i t h s o n i a n c o n t r i b u t i o n s t o b o t a n y • n u m b e r 1 0 6
... It is, thus, interesting that both Padina species in this study showed N uptake rates similar to some opportunistic sheet-group macroalgae. Padina durvillaei has nine cell layers at the base of the thallus (Riosmena-Rodriguez et al. 2009), which is thicker than those of P. antillarum with two to four cell layers and P. minor with two cell layers. The thinner thalli of P. antillarum and P. minor, having larger surface area to volume, may have enhanced their N uptake rates (Hein et al. 1995). ...
The genus Padina (Dictyotales: Dictyotaceae) are ubiquitous tropical macroalgae found in a wide range of environmental conditions, but the physiological mechanisms that allow them to thrive in different light and nutrient conditions remain unclear. This study identified Padina species found at two contrasting sites in Bolinao, Pangasinan - turbid, high-nutrient waters at Rungos, and clear, low-nutrient waters at Patar, and compared their physiological responses. The examined parameters were growth rates, photosynthetic responses to varying irradiances (P-E curves), and NO3- and NH4+ uptake kinetics. Different species were found at each site, i.e., Padina antillarum in Rungos and Padina minor in Patar. From the P-E curves, both species appeared to have "shade plant" characteristics with high α values, low compensation irradiances, and low saturation irradiances. Though P. antillarum had higher net productivity (Pmax=69.4 mg O2 gdw-1 h-1) than P. minor (Pmax=40.6 mg O2 gdw-1 h-1), their growth rates did not significantly differ. Their NO3- uptake rates were similar, while the NH4+ uptake rate of P. minor (Vmax=249.60 μmol gdw-1 h-1) was double that of P. antillarum (Vmax=104.50 μmol gdw-1 h-1) during the first 30 min of exposure to NH4+. These results suggest that each Padina species utilizes different strategies to survive in their respective habitats.
... Station 4 and 5 are comprised of rocky shore. The species found in both Station 4 and 5 is P. tetrastomatica which agrees with the study by Rodriguez et al. (2009) that stated Padina can be found inhabiting rocky substrates. P. minor which was found at Station 9 and 10 was in line with the study by Amornlerdpison et al. (2007) that stated this species can be found on rock fragments or pebbles in intertidal area. ...
Seaweeds are macroscopic algae that play an important role as primary producers in marine ecosystem. Information on the composition of seaweed carried out in this study will aid in providing baseline data for future research. The aim of this study was to assess the seaweed composition from intertidal zones of Satang Besar Island. Seaweeds were collected from 10 stations around the island. Nine genera namely Halimeda, Bryopsis, Avrainvillea, Padina, Sargassum, Halymenia, Acanthophora, Gracilaria and Polysiphonia were identified. Based on the total number of species, Chlorophyta showed the highest percentage during the entire period of study. Genus Padina was commonly found and was present in five out of 10 sampling stations. The highest species diversity value (H' = 10.20) was recorded at Station 10 where the habitat was both rocky and sandy. The differences in number of species and composition occurring at different stations may be due to different type of substrates.
... In the Gulf of California, this complex consists of four species; three confined to the Peninsula of Baja California, Mexico and one containing Japanese as well as Mexican samples that is the real P. arborescens. These species have been confused with P. concrescens because both species have blades that grow gregarious ( Riosmena-Rodríguez et al. 2009) and also have been confused with P. ...
... Padina concrescens Thivy: Panama (56a) Padina crispata Thivy wsPadina mexicana Dawson, Rios- mena- Rodríguez et al. 2009x: El Salvador (4, 9, 23, 45, 77, 80), Costa Rica (4, 6, 11, 19, 34, 74, 75), Panama (22, 56a), Central America (25, 60, 75) Padina durvillaei Bory: Nicaragua (24), (24 as Padina cau- lescens Thivy, Riosmena-Rodríguez et al. 2009), Costa Rica (6,11,12,19,74,75) ...
Our present knowledge of marine macroalgal diversity for the Central American Pacific coast is limited by the short history of investigations (ca. 100 years) and few algal spe-cialists through a large geographical area. While recent checklists have emerged for other regions of the eastern Pacific, there have been virtually no attempts to inventory macroalgal diversity for the Pacific of Central America. This checklist of the marine macroalgae was developed based on published scientific literature and unpublished records in stu-dent theses. A total of 379 species records are regarded as current valid names of marine macroalgae. The red algae (Rhodophyta) had the highest species number (252 species), followed by green algae (Chlorophyta: 81 species) and brown algae (Phaeophyceae: 46 species). The country with the greatest diversity of marine macroalgae is Costa Rica with 216 species, followed by Panama with 174, El Salvador with 146, Nicaragua with 24, and Guatemala with 16. At present, there are no published records for the Pacific coast of Honduras. Variation in number of species throughout the Pacific coast of Central America is likely due to differen-ces in geomorphology, habitat heterogeneity among national coastal-marine zones, and unbalanced research efforts.
... Así mismo, mediciones de células y/o estructuras se realizaron usando un ocular micrométrico. La literatura consultada para llevar a cabo la determinación fue Dawson (1941), Dawson (1944), Taylor (1945), Dawson (1949), Dawson (1950), Dawson (1952), Dawson (1954), Dawson (1960), Dawson & Hollenberg (1961), Dawson (1962), Dawson (1963), Hollenberg & Norris (1977, Norris & Johansen (1981), Ávila-Ortiz (2003), Kraft (2009), Riosmena-Rodríguez et al. (2009) y Norris (2010. ...
The number of seaweed species cited for the Oaxacan coast is 242. The sampling efforts were focused on both spatial and temporal differences; resulting in 37 studied localities, with the distinction in particular cases between the rainy and dry seasons. The specimens used in the previous studies are housed in foreign and national herbarium collections. The seaweed collection of the University of the Sea contains 690 number of samples. The determination and cataloging of specimens in the present study allows for determine the actual art status of the collection. The specimens were recorded on a notebook and electronically, in order to date and site. Each specimen was associated with a catalog number. The determination was obtained using specialized literature in taxonomy. The morphological characteristics were observed through a stereoscope, while the anatomic structures, in semi-permanent preparations, using an optic microscope. We found that the flora belonging to Oaxaca represented 76% of the total of housed specimens. We determined 20 genera and 33 species belonging to the Chlorophyta, Rhodophyta and Heterokontophyta divisions. The most represented species according to the number of exemplars were for green algae, Ulva lactuca, for red algae, Hypnea pannosa and for brown seaweeds Padina durvillaei. The recorded spatial representation was 12 localities, five of them without previous records in literature. According to the percentage of exemplars in relation to the total and the number of species two localities are the best represented, Agua Blanca with 64 % of specimens and 23 species, and Santa Elena with 20 % of specimens and 19 identified species. Finally, about the temporality representation, was the dry season the best represented.
Periodo de reporte: Marzo del 2013 a Junio del 2014. Resumen: Se presenta el reporte 2013-2014 sobre la flora marina de la Laguna de San Ignacio, en donde se han realizado el 50% de las visitas previstas y se ha logrado determinar 19 especies de macroalgas para la zona además de las 2 de Pastos Marinos tradicionalmente citadas. Como arte de la evaluación histórica propuesto se está desarrollando el análisis del número de especies/distribución de macroalgas y pastos marinos con base en una revisión intensa de la literatura. Para poder concluir esto desarrollaremos una salida adicional en Mayo-Junio 2014. Durante los dos últimos años no se han observado grandes abundancias de especies de macroalgas como se tiene registrado desde el 2006 y las listas florísticas desarrolladas en los 90´s. Esto adicionado con la presencia al incremento tanto de cobertura como de biomasa de especies invasoras lo que las hace un problema a considerar. Se presenta información sobre nuevas especies y extensiones de rango encontradas en la zona. .
En este ensayo resaltamos la trascendencia del desarrollo de las investigaciones enfocadas en la sistemática en Oaxaca, un estado con alta diversidad. Para discutir la importancia y trascendencia de estos estudios, utilizamos como ejemplos estudios de caso con taxones poco estudiados: moluscos dulceacuícolas y terrestres, artrópodos ectosimbiontes de murciélagos y hongos macroscópicos, así como el registro fósil. A pesar de la falta de recursos humanos e infraestructura, es necesario impulsar el desarrollo de estudios sistemáticos con el fin de mejorar la conservación, manejo y aprovechamiento de los recursos naturales oaxaqueños.
