University of Yaoundé 1, Laboratory of Parasitology and Ecology, PO Box 812, Yaoundé, Cameroon - Specialized Research Center for Marine Ecosystems, IRAD, PO Box 219, Kribi, Cameroon.
University of Douala, Laboratory of Parasitology and Ecology, PO Box 24157, Douala, Cameroon.
Parasite. 2019;26:37. doi: 10.1051/parasite/2019037. Epub 2019 Jun 27.
Three new species of Synodontella Dossou & Euzet, 1993 are described from two species of Synodontis (Mochokidae) collected from the middle course of the Boumba River (East Cameroon): Synodontella angustupenis n. sp. from Synodontis nummifer, Synodontella longipenis n. sp. and Synodontella simplex n. sp. from Synodontis decorus. These new species are different from the other Synodontella species already described due to their horseshoe-shaped dorsal transverse bars. Synodontella angustupenis differs from S. longipenis and S. simplex by the morphology of its penis, a thin tube, and its accessory piece, bifid at its extremity. Synodontella longipenis differs from the other two species by the morphology and the size of its male copulatory organ, which is very long. Synodontella simplex differs from S. angustupenis and S. longipenis by the shape of its penis, which is simple, and of its accessory piece, with a developed heel. The difference between the dorsal transverse bars of Synodontella species from the Sanaga River in Cameroon (and other localities in Africa), slightly curved, and those from the Boumba River, horseshoe-shaped, makes it possible to separate Synodontella species into two different subgroups. This difference can be explained by a long isolation period of the hosts, living in different river basins, followed by the divergence of the parasite populations (vicariant speciation).
三种新的 Synodontella Dossou & Euzet, 1993 物种被描述于从 boumba 河（喀麦隆东部）中游采集的两种 Synodontis（Mochokidae）中：Synodontella angustupenis n. sp. 来自 Synodontis nummifer，Synodontella longipenis n. sp. 和 Synodontella simplex n. sp. 来自 Synodontis decorus。这些新物种与已经描述的其他 Synodontella 物种不同，因为它们具有马蹄形的背横向条纹。Synodontella angustupenis 与 S. longipenis 和 S. simplex 不同之处在于其阴茎的形态，一个薄管和其附属物，在其末端分叉。Synodontella longipenis 与其他两种物种不同之处在于其雄性交配器官的形态和大小，非常长。Synodontella simplex 与 S. angustupenis 和 S. longipenis 不同之处在于其阴茎的形状，简单，和其附属物，具有发达的后跟。喀麦隆 Sanaga 河（和非洲其他地方）的 Synodontella 物种的背横向条纹，稍微弯曲，与 boumba 河的马蹄形背横向条纹不同，这使得 Synodontella 物种可以分为两个不同的亚群。这种差异可以通过宿主的长期隔离来解释，它们生活在不同的流域中，随后寄生虫种群的分化（地理隔离导致的物种形成）。
