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Más allá de la individualidad: desviaciones del desarrollo y evolutivas en los planes corporales de los animales

Toru Miura¹, Kohei Oguchi²

¹Misaki Marine Biological Station, School of Science, The University of Tokyo, Miura, Kanagawa 238-0225, Japan, miu@mmbs.s.u-tokyo.ac.jp.

Zoological science

|February 25, 2026

Resumen

La evolución animal muestra una notable plasticidad del desarrollo, lo que permite diversos planes corporales y desafía las definiciones tradicionales de individualidad. Esta flexibilidad permite la adaptación y resalta diversas estrategias organizativas en el reino animal.

Área de la Ciencia:

Biología evolutiva
Biología del desarrollo
Morfología animal

Sus antecedentes:

La multicelularidad es una innovación clave en la evolución de los metazoos, lo que lleva a individuos integrados.
La individualidad animal se define típicamente por sistemas de órganos desarrollados durante la embriogénesis, regulados por genes como los genes Hox.
Algunos linajes animales se desvían de este modelo canónico.

Objetivo del estudio:

Explorar la plasticidad del desarrollo y la flexibilidad evolutiva en linajes animales.
Examinar cómo las vías de desarrollo alternativas desafían las definiciones convencionales de la individualidad animal.
Destacar la diversidad de estrategias organizativas en el reino animal.

Principales métodos:

Análisis comparativo de diversos linajes animales con estrategias de desarrollo únicas.
Revisión de los mecanismos genéticos y de desarrollo que subyacen a la plasticidad postembrionaria.
Examen de las adaptaciones morfológicas y del ciclo de vida en varios taxones.

Principales resultados:

Las especies eusociales exhiben especialización de tareas y división reproductiva del trabajo a través de la plasticidad del desarrollo.
Los anélidos silídidos y otros linajes muestran estrategias reproductivas y arquitecturas corporales únicas.
La simetría pentarradial en los equinodermos y las formas bentónicas en los ctenóforos representan desviaciones significativas de los planes corporales ancestrales.
Muchos linajes conservan una flexibilidad de desarrollo y evolutiva significativa.

Conclusiones:

La individualidad animal es más diversa de lo que se define típicamente por sistemas de órganos integrados.
La plasticidad del desarrollo permite transiciones que desafían la individualidad convencional.
La flexibilidad evolutiva permite la adaptación a nichos ecológicos a través de estrategias organizativas variadas.

Palabras clave:

bilateriano plan corporal colonialidad eusocialidad individualidad superorganismo

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