First record of Oligobregma Kudenov & Blake, 1975 (Annelida: Polychaeta: Scalibregmatidae Malmgren, 1867) from Brazil with the description of three new species.

IF 0.8 4区生物学 Q3 ZOOLOGY Zootaxa Pub Date : 2024-03-12 DOI:10.11646/zootaxa.5424.1.4

Samuel Lucas DA Silva Delgado Mendes, Paulo Cesar DE Paiva, Alexandra E Rizzo

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Abstract

Oligobregma represents the most speciose genus of Scalibregmatidae with 17 valid species. Most of them occur at great depths and are found living on soft bottoms. Here, we present the descriptions of O. nonatoi sp. nov., O. cruzae sp. nov., and O. bakkeni sp. nov., sampled from the Brazilian continental shelf and slope, and a key to all species of Oligobregma. O. nonatoi sp. nov. differs from its congeners by the presence of a triangular prostomium with short rounded horns, acicular spines on notopodia of chaetigers 14 and on neuropodia of chaetigers 13. Oligobregma cruzae sp. nov. can be distinguished by the presence of a quadrangular prostomium with two short, rounded horns, acicular spines on chaetigers 14, and lyrate chaetae from chaetiger 5. Finally, O. bakkeni sp. nov. is unique among its congeners by the presence of acicular spines with rounded tips. This is the first record of this genus along the Brazilian coast and the specimens were collected on Esprito Santo, Campos and Santos sedimentary basins, both located in Brazilian southeast region. The sampling campaigns were carried out in scientific expeditions related to two research projects: Santos Project Santos Basin Environmental Characterization and Ambes Project Esprito Santo Basin Assessment Project, both coordinated by CENPES/PETROBRAS.

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首次记录巴西的 Oligobregma Kudenov & Blake, 1975 (Annelida: Polychaeta: Scalibregmatidae Malmgren, 1867) 并描述了三个新种。

Oligobregma 是 Scalibregmatidae 中物种最多的属，有 17 个有效物种。它们大多生活在水深很深的软海底。在此，我们介绍了取样于巴西大陆架和斜坡的 O. nonatoi 新种、O. cruzae 新种和 O. bakkeni 新种，以及 Oligobregma 所有物种的检索表。O. nonatoi sp. nov.与其同属种的不同之处在于：它的前体呈三角形，有短的圆形角，栉水母 14 的喙上有针状刺，栉水母 13 的神经喙上也有针状刺。Oligobregma cruzae sp. nov.可以通过带有两个短圆角的四角形前体、触角 14 上的针状刺以及触角 5 上的里氏触角来区分。最后，O. bakkeni sp.这是该属在巴西沿海地区的首次记录，标本采集于圣埃斯皮里图、坎波斯和桑托斯沉积盆地，均位于巴西东南部地区。采样活动是在与两个研究项目有关的科学考察中进行的：这两个项目均由 CENPES/PETROBRAS 负责协调。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Zootaxa 生物-动物学

CiteScore

1.90

自引率

33.30%

发文量

1895

审稿时长

2.7 months

期刊介绍： Zootaxa is a peer-reviewed international journal for rapid publication of high quality papers on any aspect of systematic zoology, with a preference for large taxonomic works such as monographs and revisions. Zootaxa considers papers on all animal taxa, both living and fossil, and especially encourages descriptions of new taxa. All types of taxonomic papers are considered, including theories and methods of systematics and phylogeny, taxonomic monographs, revisions and reviews, catalogues/checklists, biographies and bibliographies, identification guides, analysis of characters, phylogenetic relationships and zoogeographical patterns of distribution, descriptions of taxa, and nomenclature. Open access publishing option is strongly encouraged for authors with research grants and other funds. For those without grants/funds, all accepted manuscripts will be published but access is secured for subscribers only.