Publicado

2025-12-09

Gonopod morphology among of seven species of eubrachyuran crabs (Crustacea: Decapoda)

Morfología de gonópodos entre siete especies de cangrejos eubraquiuros (Crustacea: Decapoda)

Palabras clave:

Copulatory structures, Cuticular specializations, Ejaculatory canal, Setae types (en)
Canal eyaculador, Especializaciones cuticulares, Estructuras copulatorias, Tipos de setas (es)

Autores/as

The first and second gonopods (G1 and G2, respectively) in Eubrachyura crabs are covered with cuticular specializations that vary in shape and size. Describing these specializations would allow a better understanding of this organ and its role in copulation, especially if associated with the internal structure of the gonopods. Therefore, this study aims to contrast the morphology of the gonopods of seven species of Eubrachyura. The specimens were analyzed macroscopically, histologically, and microscopically using SEM. The G1 and the G2 in all species are formed by two segments, with G1 presenting an ejaculatory canal that is lacking in G2. Apical projections were observed in four species. The G2 endopodvaries in size among species. Five types of setae were observed: simple, pappose, papposerrate, conical, and paddle-shaped. Histologically, G1 and G2 are very similar, differing in that G1 presents the ejaculatory canal in longitudinal and transverse sections, as well as tegumentary glands, whereas G2 lacks both. There is a trend in the morphology of Eubrachyura crab’s gonopods which corresponds to the groups Thoracotremata and Heterotremata. The observed morphological variations suggest the presence of species-specific gonopod types.

Los primeros (G1) y segundos (G2) gonópodos en los cangrejos Eubrachyura están cubiertos con especializaciones cuticulares que varían en forma y tamaño. Describir dichas especializaciones permitiría una mejor comprensión de este órgano y su papel en la copulación, especialmente si se asocia con la estructura interna de los gonópodos. Por lo tanto, este estudio tiene como objetivo contrastar la morfología de los gonópodos entre siete especies de Eubrachyura. Los especímenes fueron analizados macroscópicamente e histológicamente por medio de microscopía electrónica de barrido (SEM). En todas las especies el G1 y el G2 están formados por dos segmentos, el G1 presenta un canal eyaculador, mientras que el G2 no lo presenta. Se observaron proyecciones apicales en cuatro especies. El endopodito G2 varía en tamaño entre las especies. Se observaron cinco tipos de setas: simples, papposas, papposerradas, cónicas y en forma de paleta. Histológicamente, el G1 y el G2 son muy similares, diferenciándose en que el G1 presenta el canal eyaculador en secciones longitudinales y transversales, y glándulas tegumentarias, mientras que el G2 carece de ambos. Existe una tendencia en la morfología de los gonópodos de los cangrejos Eubrachyura que corresponde a los grupos Thoracotremata y Heterotremata. Las variaciones observadas sugieren la existencia de estructuras gonopodales específicas para cada especie.

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Cómo citar

APA

Souza, L. P. de, Ogawa, C. Y., Silva, J. R. F., Linhares, J. C. S., Faustino, L. R., Barreto, A. F. dos S. & Camargo-Mathias , M. I. (2025). Gonopod morphology among of seven species of eubrachyuran crabs (Crustacea: Decapoda). Acta Biológica Colombiana, 30(3). https://revistas.unal.edu.co/index.php/actabiol/article/view/116484

ACM

[1]
Souza, L.P. de, Ogawa, C.Y., Silva, J.R.F., Linhares, J.C.S., Faustino, L.R., Barreto, A.F. dos S. y Camargo-Mathias , M.I. 2025. Gonopod morphology among of seven species of eubrachyuran crabs (Crustacea: Decapoda). Acta Biológica Colombiana. 30, 3 (sep. 2025).

ACS

(1)
Souza, L. P. de; Ogawa, C. Y.; Silva, J. R. F.; Linhares, J. C. S.; Faustino, L. R.; Barreto, A. F. dos S.; Camargo-Mathias , M. I. Gonopod morphology among of seven species of eubrachyuran crabs (Crustacea: Decapoda). Acta biol. Colomb. 2025, 30.

ABNT

SOUZA, L. P. de; OGAWA, C. Y.; SILVA, J. R. F.; LINHARES, J. C. S.; FAUSTINO, L. R.; BARRETO, A. F. dos S.; CAMARGO-MATHIAS , M. I. Gonopod morphology among of seven species of eubrachyuran crabs (Crustacea: Decapoda). Acta Biológica Colombiana, [S. l.], v. 30, n. 3, 2025. Disponível em: https://revistas.unal.edu.co/index.php/actabiol/article/view/116484. Acesso em: 9 ene. 2026.

Chicago

Souza, Leonardo Peres de, Cynthia Yuri Ogawa, José Roberto Feitosa Silva, Jussiara Candeira Spíndola Linhares, Luciana Rocha Faustino, Andressa Freitas dos Santos Barreto, y Maria Izabel Camargo-Mathias. 2025. «Gonopod morphology among of seven species of eubrachyuran crabs (Crustacea: Decapoda)». Acta Biológica Colombiana 30 (3). https://revistas.unal.edu.co/index.php/actabiol/article/view/116484.

Harvard

Souza, L. P. de, Ogawa, C. Y., Silva, J. R. F., Linhares, J. C. S., Faustino, L. R., Barreto, A. F. dos S. y Camargo-Mathias , M. I. (2025) «Gonopod morphology among of seven species of eubrachyuran crabs (Crustacea: Decapoda)», Acta Biológica Colombiana, 30(3). Disponible en: https://revistas.unal.edu.co/index.php/actabiol/article/view/116484 (Accedido: 9 enero 2026).

IEEE

[1]
L. P. de Souza, «Gonopod morphology among of seven species of eubrachyuran crabs (Crustacea: Decapoda)», Acta biol. Colomb., vol. 30, n.º 3, sep. 2025.

MLA

Souza, L. P. de, C. Y. Ogawa, J. R. F. Silva, J. C. S. Linhares, L. R. Faustino, A. F. dos S. Barreto, y M. I. Camargo-Mathias. «Gonopod morphology among of seven species of eubrachyuran crabs (Crustacea: Decapoda)». Acta Biológica Colombiana, vol. 30, n.º 3, septiembre de 2025, https://revistas.unal.edu.co/index.php/actabiol/article/view/116484.

Turabian

Souza, Leonardo Peres de, Cynthia Yuri Ogawa, José Roberto Feitosa Silva, Jussiara Candeira Spíndola Linhares, Luciana Rocha Faustino, Andressa Freitas dos Santos Barreto, y Maria Izabel Camargo-Mathias. «Gonopod morphology among of seven species of eubrachyuran crabs (Crustacea: Decapoda)». Acta Biológica Colombiana 30, no. 3 (septiembre 12, 2025). Accedido enero 9, 2026. https://revistas.unal.edu.co/index.php/actabiol/article/view/116484.

Vancouver

1.
Souza LP de, Ogawa CY, Silva JRF, Linhares JCS, Faustino LR, Barreto AF dos S, Camargo-Mathias MI. Gonopod morphology among of seven species of eubrachyuran crabs (Crustacea: Decapoda). Acta biol. Colomb. [Internet]. 12 de septiembre de 2025 [citado 9 de enero de 2026];30(3). Disponible en: https://revistas.unal.edu.co/index.php/actabiol/article/view/116484

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