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Issue: Vol. 5722 No. 3: 20 Nov. 2025
Type: Article
Published: 2025-11-20
DOI: 10.11646/zootaxa.5722.3.5
Page range: 391-407
Abstract views: 36
PDF downloaded: 1

Endolobactis simoesii gen. et sp. nov. (Cnidaria: Actiniaria), a new species of sea anemone from the Yucatán Peninsula, Mexico

Laboratorio de Biología de Cnidarios; Facultad de Ciencias Exactas y Naturales; Instituto de Investigaciones Marinas y Costeras (IIMyC); CONICET; Universidad Nacional de Mar del Plata; Mar del Plata; Argentina.
Division of Invertebrate Zoology; American Museum of Natural History; 200 Central Park West; New York; NY 10024; USA.
Laboratory of Evolution and Aquatic Diversity (LEDALab); Faculty of Sciences; Department of Biological Sciences; São Paulo State University (UNESP); Av. Eng. Luiz Edmundo Carrijo Coube; 14-01; Bauru; São Paulo 17033-360; Brazil.
Laboratorio de Biología de Cnidarios; Facultad de Ciencias Exactas y Naturales; Instituto de Investigaciones Marinas y Costeras (IIMyC); CONICET; Universidad Nacional de Mar del Plata; Mar del Plata; Argentina.; Estación Científica Coiba (Coiba-AIP); Calle Gustavo Lara; Edificio 145B; Clayton; Panamá; República de Panamá.
Coelenterata Actiniidae sea anemone Endolobactis simoesii

Abstract

A new genus and species of sea anemone belonging to the family Actiniidae, Endolobactis simoesii gen. et sp. nov., is described. A comprehensive description is provided, including information on its external and internal anatomical features, cnidome, and size ranges and distribution of cnidae, accompanied by images of live specimens and their histological characteristics. The most distinctive feature of E. simoesii gen. et sp. nov. is the frond-like marginal projections located on exclusively endocoelic lobes. This contrasts with other genera in Actiniidae that exhibit similar marginal projections, which are commonly referred to as a “marginal ruff.” In addition, E. simoesii gen. et sp. nov. has more mesenteries proximally than distally. These and other differences between E. simoesii gen. et sp. nov. and other genera within Actiniidae with similar features are discussed in detail. With the inclusion of E. simoesii gen. et sp. nov., the number of documented sea anemone species along the Mexican Atlantic coast increases to 24.

 

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How to Cite

González-Muñoz, R., Rodríguez, E., Durán-Fuentes, J. & Acuña, F.H. (2025) Endolobactis simoesii gen. et sp. nov. (Cnidaria: Actiniaria), a new species of sea anemone from the Yucatán Peninsula, Mexico. Zootaxa, 5722 (3), 391–407. https://doi.org/10.11646/zootaxa.5722.3.5