Setor de Carcinologia; Museu Nacional/Universidade Federal do Rio de Janeiro; Quinta da Boa Vista; So Cristvo s/n; 20940-040; Rio de Janeiro; Brazil; Programa de Ps-graduao em Cincias Biolgicas (Zoologia); Museu Nacional/Universidade Federal do Rio de Janeiro; Quinta da Boa Vista; So Cristvo s/n; 20940-040; Rio de Janeiro; Brazil.
Zootaxa. 2023 Dec 11;5383(2):101-134. doi: 10.11646/zootaxa.5383.2.1.
The family Leuconidae Sars, 1878 is one of the eight widely recognized families of Cumacea and can be found in all oceans, but often in deeper waters (> 200 m). Despite its worldwide distribution, Southwestern Atlantic records were restricted to Argentina and Uruguay, indicating a gap in the knowledge of the group along the Brazilian coast. Samples were collected in the Campos, Esprito Santo and Santos Basins with box core and/or van Veen grabs between 163000 m in depth. A total of five new species and a new genus are described herein. Leucon (Alytoleucon) rhuanae sp. nov., Leucon (Crymoleucon) pseudograndidentatus sp. nov., Leucon (Macrauloleucon) watlingi sp. nov., Eudorella helenae sp. nov. and Gyneleucon tripedium gen. et sp. nov. The lack of knowledge on cumacean leuconids along the Brazilian coast is clearly a result of taxonomic impediment. The present study is an effort towards understanding and revealing the Cumacea fauna from the Brazilian margin, bringing new data on the family Leuconidae found in the continental shelf and slope of the Esprito Santo, Campos and Santos Basins, areas with high oil and gas exploration. Promoting the characterization of these areas is essential to a wide understanding of the local species richness and consequently provides tools for preservation and monitoring activities.
Leuconidae Sars, 1878 科是八大家庭 Cumacea 之一，广泛分布于各大洋，但通常生活在深海（>200 米）中。尽管分布广泛，但南大西洋的记录仅限于阿根廷和乌拉圭，表明巴西沿海对该群体的了解存在空白。在坎波斯、圣埃斯皮里图和桑托斯盆地，从水深 163000 米处采集样本，使用箱式岩芯和/或 Van Veen 抓斗进行采集。本文共描述了五个新种和一个新属。新种 Leucon (Alytoleucon) rhuanae sp. nov.、Leucon (Crymoleucon) pseudograndidentatus sp. nov.、Leucon (Macrauloleucon) watlingi sp. nov.、Eudorella helenae sp. nov. 和 Gyneleucon tripedium gen. et sp. nov. 巴西沿海对 Cumacea 类 Leuconidae 的了解不足显然是分类障碍的结果。本研究旨在理解和揭示巴西边缘的 Cumacea 动物群，为在 Esprito Santo、坎波斯和桑托斯盆地大陆架和斜坡上发现的 Leuconidae 家族提供新数据，这些地区具有高油气勘探价值。促进这些地区的特征描述对于广泛了解当地物种丰富度至关重要，并为保护和监测活动提供工具。
