Results: 55

Expansion of the genus Massinium (Holothuroidea: Thyonidae) to the American continent and description of a new species

Rev. biol. trop; 69 (supl. 2), 2021
Introduction: The genus Massinium includes 11 species, most from the Indo Pacific Ocean, and had not previously being reported from the American continent. Objective: To present the new record of the genus Massinium and describe a new species of this genus. Methods: Material collection was done by SCUBA-...

Los ofiuroideos (Echinodermata: Ophiuroidea) de la bahía de Chamela, Jalisco, México

Rev. biol. trop; 69 (supl. 2), 2021
Introducción: La bahía de Chamela está ubicada en la parte central de la costa del estado de Jalisco, México y es un importante área natural protegida. Pese a ello, el estudio de los equinodermos en la zona es incipiente. Objetivo: Proporcionar una lista de verificación actualizada, descripciones d...

Heart urchins from the depths: Corparva lyrida gen. et sp. nov. (Palaeotropidae), and new records for the southwestern Atlantic Ocean

Rev. biol. trop; 69 (supl. 2), 2021
Introduction: Sea urchins in the order Spatangoida are the most diverse group of extant echinoids. Objective: Describe a new genus and species of Spatangoida from abyssal depths, and add new records for known species. Methods: Specimens were collected during several cruises at different areas of the sout...

¿Hacia dónde va la acuicultura de equinodermos en América Latina? Potencial, retos y oportunidades

Rev. biol. trop; 69 (supl. 2), 2021
Introducción: La acuicultura de equinodermos en América Latina es incipiente, pero representa una nueva frontera para la producción de alimentos marinos altamente nutritivos, con especies nativas de alto valor comercial que ofrecen un gran potencial en comparación con las debilitadas pesquerías bent...

Echinoderms (Echinodermata) from the Central Mexican Pacific

Rev. biol. trop; 69 (supl. 2), 2021
Introduction: The echinoderms from the Central Mexican Pacific are of high scientific interest and, prior to this present work, there was a lack of basic information that included incomplete checklists with inconsistencies in systematics and spatial distribution. Objective: To provide a historical review...

Morphological variability of recent species of the order Cassiduloida (Echinodermata: Echinoidea) of Mexico

Rev. biol. trop; 69 (supl. 2), 2021
Introduction: In Mexico, there are two recorded living species of Cassiduloida: Cassidulus caribaearum and Rhyncholampas pacifica. Most of the taxonomic studies on cassiduloids have used external morphology, pedicellariae and morphometric characters; however, the intraspecific variation of quantitative a...

Biodiversidad de ofiuroideos (Echinodermata: Ophiuroidea) del talud de la Península de Yucatán, México

Rev. biol. trop; 69 (supl. 2), 2021
Introduction: The Ophiuroidea class is the most diverse of the Phylum Echinodermata, with 2 064 described species, which can be found from intertidal zones to abyssal depths, but the fauna of Yucatan peninsula needs more study. Objective: To describe the diversity of ophiuroids in the Yucatan continental...

The influence of density on survival and larval development in the sea urchin Arbacia dufresnii (Echinodermata: Echinoidea)

Rev. biol. trop; 69 (supl. 2), 2021
Introduction: Density is one of the critical factors in echinoderm larvae for aquaculture purposes. Echinoplutei larvae are very sensitive to overcrowding. High culture density can lead to problems with bacteria or protozoa, decreasing survival and generating abnormal morphotypes. Objective: To evaluate ...

Diversity and biostratigraphy of the late Oligocene-late Miocene sand dollars (Echinoidea: Scutelliformes) of Argentina and Uruguay

Rev. biol. trop; 69 (supl. 2), 2021
Introduction: Scutelliforms were diverse and widespread in shallow marine environments during Neogene times in South America. Nevertheless, they have almost never been used as biostratigraphic tools. Objective: To provide a refined stratigraphic frame useful for calibrating temporal dimensions of scutell...

First record of Ubaghsicystis (Eocrinoidea - Echinodermata) from the Cambrian (Miaolingian, Wuliuan) of Sonora, Mexico: Biostratigraphical and paleoecological considerations

Rev. biol. trop; 69 (supl. 2), 2021
Introduction: The present work constitutes the first record of Ubaghsicystis Gil-Cid & Domínguez-Alonso (Echinodermata-Eocrinoidea) in the El Gavilán Formation, exposed in the El Sahuaral Hill, a new Cambrian locality of central Sonora, Mexico. The El Gavilán Formation is a sedimentary sequence mainly...