Acusicola rochai n. sp. (Copepoda: Ergasilidae) parasitizing Anableps anableps (Anablepidae) from the Amazon Coast, with a key for Acusicola spp.

IF 1.1 4区 生物学 Q3 MARINE & FRESHWATER BIOLOGY Journal of the Marine Biological Association of the United Kingdom Pub Date : 2024-08-01 DOI:10.1017/s0025315424000560
João Victor Couto, Jorge Luiz Silva Nunes, Fabiano Paschoal, Felipe Bisaggio Pereira
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引用次数: 0

摘要

麦角桡足类是巴西最常见的鱼类寄生虫之一。在 Ergasilidae 中,有三个属的触角上都有一个奇特的闩锁机制,可以完全环绕鳃丝,其中一个属是 Acusicola Cressey,1970 年。在对巴西亚马孙河沿岸的河口鱼类进行调查期间,在马拉尼昂州圣马科斯湾的大型胭脂鱼 Anableps anableps (Linnaeus, 1758) (Actinopterygii: Anablepidae) 的鳃上发现了一种 Acusicola 新种。Acusicola rochai n. sp.主要通过第三和第四节背板上的三个突起以及光滑的节间板与其近缘种进行区分。这是首次报道寄生于 Anablepidae 鱼类的桡足类,因此也是寄主 Anableps 的桡足类。现有的 Acusicola 属二分检索表只包括 10 个物种,不包括后来描述的 8 个物种。因此,本研究根据可靠和有据可查的特征,提供了一个新的二分检索表。
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Acusicola rochai n. sp. (Copepoda: Ergasilidae) parasitizing Anableps anableps (Anablepidae) from the Amazon Coast, with a key for Acusicola spp.

Ergasilid copepods represent one of the commonest groups of fish parasites in Brazil. Within Ergasilidae, three genera share a peculiar latching mechanism on the antenna that completely encircles the gill filament, one of which is Acusicola Cressey, 1970. During a survey of estuarine fish from the Brazilian Amazon Coast, a new species of Acusicola was found on the gills of the largescale foureyes Anableps anableps (Linnaeus, 1758) (Actinopterygii: Anablepidae) in São Marcos Bay, State of Maranhão. Acusicola rochai n. sp. can be distinguished from its closest congeners mainly by three protrusions on the dorsal surface of third and fourth pedigerous somites, and by smooth interpodal plates. This work is the first report of a parasitic copepod infesting a fish from Anablepidae and, consequently, the host An. anableps. The existing dichotomous key proposed for the genus Acusicola includes only ten species, excluding the eight species subsequently described. Therefore, in the present work, a new dichotomous key is provided based on reliable and well-documented features.

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来源期刊
CiteScore
2.30
自引率
8.30%
发文量
68
审稿时长
3-8 weeks
期刊介绍: JMBA is an international journal, publishing original research on all aspects of marine biology. It includes pioneering work taking place today on major issues concerning marine organisms and their environment. Subjects covered include: ecological surveys and population studies of marine communities; physiology and experimental biology; taxonomy, morphology and life history of marine animals and plants; and chemical and physical oceanographic work. Included with 2010 online subscriptions: Marine Biodiversity Records.
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