On the morphological variations in a population of Cladonema radiatum (Hydrozoa: Cladonematidae): New evidence from the southern Gulf of Mexico

On the morphological variations in a population of Cladonema radiatum (Hydrozoa: Cladonematidae): New evidence from the southern Gulf of Mexico

The lack of knowledge on the morphological variability in hydrozoan populations has resulted in numerous misidentifications over history. Cladonema radiatum Dujardin, 1843 is characterized by presenting different morphologies in different localities of the world, which has caused many taxonomic conf...

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Autores principales: Ahuatzin-Hernández, José María, Canul-Cabrera, Jesús Andrés, Ordóñez-López, Uriel, León-Deniz, Lorena Violeta
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Publicado: Iniversidad Autónoma de Baja California 2022
Acceso en línea:https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/3312
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author Ahuatzin-Hernández, José María
Canul-Cabrera, Jesús Andrés
Ordóñez-López, Uriel
León-Deniz, Lorena Violeta
spellingShingle Ahuatzin-Hernández, José María
Canul-Cabrera, Jesús Andrés
Ordóñez-López, Uriel
León-Deniz, Lorena Violeta
On the morphological variations in a population of Cladonema radiatum (Hydrozoa: Cladonematidae): New evidence from the southern Gulf of Mexico
author_facet Ahuatzin-Hernández, José María
Canul-Cabrera, Jesús Andrés
Ordóñez-López, Uriel
León-Deniz, Lorena Violeta
author_sort Ahuatzin-Hernández, José María
title On the morphological variations in a population of Cladonema radiatum (Hydrozoa: Cladonematidae): New evidence from the southern Gulf of Mexico
title_short On the morphological variations in a population of Cladonema radiatum (Hydrozoa: Cladonematidae): New evidence from the southern Gulf of Mexico
title_full On the morphological variations in a population of Cladonema radiatum (Hydrozoa: Cladonematidae): New evidence from the southern Gulf of Mexico
title_fullStr On the morphological variations in a population of Cladonema radiatum (Hydrozoa: Cladonematidae): New evidence from the southern Gulf of Mexico
title_full_unstemmed On the morphological variations in a population of Cladonema radiatum (Hydrozoa: Cladonematidae): New evidence from the southern Gulf of Mexico
title_sort on the morphological variations in a population of cladonema radiatum (hydrozoa: cladonematidae): new evidence from the southern gulf of mexico
description The lack of knowledge on the morphological variability in hydrozoan populations has resulted in numerous misidentifications over history. Cladonema radiatum Dujardin, 1843 is characterized by presenting different morphologies in different localities of the world, which has caused many taxonomic confusions within the group. In this study, the morphological variability in a population of C. radiatum is analyzed. The material came from a coastal lagoon in the southern Gulf of Mexico. The samplings were carried out for 3 months in 2017. Salinity, dissolved oxygen, and temperature were recorded at each sampling site. Cladonema radiatum was more abundant and bigger when the lagoon showed the lowest levels of salinity. Six different morphologies were recognized. The presence of gelatinous papillae on the abaxial surface of marginal bulbs and an abaxial arrangement of nematocysts in the shortest branches of the tentacles are features recorded for the first time in the species. These considerations enrich the taxonomic description of C. radiatum and contribute to the knowledge on the taxonomy of Hydrozoa in Mexico. The taxonomy of Cladonema continues to be confusing, and the present work sets a basis for further integrative studies clarifying the morphological boundaries of the genus. However, only integrative works based on the morphology and molecular analyses of the species would be able to decode its cryptic nature.
publisher Iniversidad Autónoma de Baja California
publishDate 2022
url https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/3312
_version_ 1792095481212436480
spelling oai:cienciasmarinas.com.mx:article-33122023-12-20T19:18:45Z On the morphological variations in a population of Cladonema radiatum (Hydrozoa: Cladonematidae): New evidence from the southern Gulf of Mexico Sobre las variaciones morfológicas en una población de Cladonema radiatum (Hydrozoa: Cladonematidae): Nueva evidencia en el sur del golfo de México Ahuatzin-Hernández, José María Canul-Cabrera, Jesús Andrés Ordóñez-López, Uriel León-Deniz, Lorena Violeta taxonomy phenotypic plasticity coastal lagoon Anthoathecata evolution taxonomía plasticidad fenotípica laguna costera Anthoathecata evolución The lack of knowledge on the morphological variability in hydrozoan populations has resulted in numerous misidentifications over history. Cladonema radiatum Dujardin, 1843 is characterized by presenting different morphologies in different localities of the world, which has caused many taxonomic confusions within the group. In this study, the morphological variability in a population of C. radiatum is analyzed. The material came from a coastal lagoon in the southern Gulf of Mexico. The samplings were carried out for 3 months in 2017. Salinity, dissolved oxygen, and temperature were recorded at each sampling site. Cladonema radiatum was more abundant and bigger when the lagoon showed the lowest levels of salinity. Six different morphologies were recognized. The presence of gelatinous papillae on the abaxial surface of marginal bulbs and an abaxial arrangement of nematocysts in the shortest branches of the tentacles are features recorded for the first time in the species. These considerations enrich the taxonomic description of C. radiatum and contribute to the knowledge on the taxonomy of Hydrozoa in Mexico. The taxonomy of Cladonema continues to be confusing, and the present work sets a basis for further integrative studies clarifying the morphological boundaries of the genus. However, only integrative works based on the morphology and molecular analyses of the species would be able to decode its cryptic nature. La falta de conocimiento sobre la variabilidad morfológica en poblaciones de hidrozoos ha generado numerosas identificaciones erróneas a lo largo de la historia. Cladonema radiatum Dujardin, 1843 se caracteriza por presentar diferentes morfologías en diferentes localidades del mundo, lo cual ha ocasionado diversas confusiones taxonómicas dentro del grupo. En el presente estudio se analiza la variabilidad morfológica en una población de C. radiatum. El material provino de una laguna costera en el sur del golfo de México. Los muestreos se llevaron a cabo durante 3 meses del año 2017. En cada sitio de muestreo se registraron los valores de salinidad, oxígeno disuelto y temperatura. Cladonema radiatum fue más abundante y presentó tamaños más grandes cuando la laguna tuvo los valores más bajos de salinidad. Se reconocieron 6 morfologías diferentes. La presencia de papilas gelatinosas en la superficie abaxial de los bulbos marginales y un arreglo abaxial de los nematocistos en las ramificaciones más cortas de los tentáculos marginales son características documentadas por primera vez en la especie. Estas consideraciones enriquecen la descripción taxonómica de C. radiatum y contribuyen al conocimiento sobre la taxonomía de hidrozoos en México. No obstante, la taxonomía de Cladonema continúa siendo confusa. El presente trabajo establece una base para futuros estudios integradores que clarifiquen los límites morfológicos del género. Sin embargo, solo trabajos integradores basados en la morfología y el análisis molecular de las especies del género permitirán decodificar su naturaleza críptica. Iniversidad Autónoma de Baja California 2022-12-16 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article Artículo Arbitrado application/pdf text/xml text/xml https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/3312 10.7773/cm.y2022.3312 Ciencias Marinas; Vol. 48 (2022) Ciencias Marinas; Vol. 48 (2022) 2395-9053 0185-3880 eng spa https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/3312/420420704 https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/3312/420420928 https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/3312/420420929 Copyright (c) 2022 José María Ahuatzin-Hernández, Jesús Andrés Canul-Cabrera, Uriel Ordóñez-López, Lorena Violeta León-Deniz https://creativecommons.org/licenses/by/4.0

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