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Issue: Vol. 5716 No. 1: 29 Oct. 2025
Type: Article
Published: 2025-10-29
DOI: 10.11646/zootaxa.5716.1.3
Page range: 66-92
Abstract views: 84
PDF downloaded: 2

Molecular and morphological discrimination of Taliepus marginatus (Bell, 1836) and T. dentatus (H. Milne Edwards, 1834) (Decapoda: Brachyura: Epialtidae): insights from their larval development

Instituto Universitario de Investigación Marina, Universidad de Cádiz, Avda. República Saharaui, 11510 Puerto Real, Cádiz, Spain
Departamento de Biología de Organismos y Sistemas, Universidad de Oviedo, C/ Catedrático Rodrigo Uría s/n 33071, Oviedo, Spain
Applied Coastal Ecology Laboratory, Department of Environmental Science and Management, Portland State University, Oregon, USA
Instituto de Ciencias Marinas de Andalucía, Avda. República Saharaui, 2, 11510 Puerto Real, Cádiz, Spain
Laboratorio de Ecofisiología y Ecología Evolutiva Marinas, Instituto de Biología, Facultad de Ciencias, Universidad de Valparaíso, Chile
Laboratorio de Ecofisiología y Ecología Evolutiva Marinas, Instituto de Biología, Facultad de Ciencias, Universidad de Valparaíso, Chile; Centro de Observación y análisis del Ambiente Costero, Universidad de Valparaíso, Chile
Majoidea zoea megalopa identification key Crustacea

Abstract

This study provides molecular and morphological evidence supporting the existence of two distinct Taliepus species along the Southeastern Pacific coast, T. dentatus (H. Milne Edwards, 1834) and T. marginatus (Bell, 1836). DNA analysis revealed a significant genetic divergence between the two species, with a 95% similarity in a partial 16S rRNA sequence. The observed genetic distance falls within the expected intrageneric range, confirming the validity of both species. In addition, the complete larval development of T. marginatus is described and illustrated for the first time and compared with that for T. dentatus (by Fagetti & Campodonico 1971). While some morphological differences were observed between the two species, these were minor and may not be sufficient for reliable identification. Identification keys for zoeal and megalopa stages of the subfamily Epialtinae Macleay, 1838 were provided, aiding in the identification of plankton-collected specimens. The limited morphological divergence between the two Taliepus species suggests that speciation may have been driven by ecological and/or environmental factors affecting the adult stage.

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How to Cite

Gonzalez-Gordillo, J.I., Weidberg, N., Tissot, A.G., Cuesta, J.A., Fernández, F.M. & Baldanzi, S. (2025) Molecular and morphological discrimination of Taliepus marginatus (Bell, 1836) and T. dentatus (H. Milne Edwards, 1834) (Decapoda: Brachyura: Epialtidae): insights from their larval development. Zootaxa, 5716 (1), 66–92. https://doi.org/10.11646/zootaxa.5716.1.3