Instituto de Investigaciones de la Amazonía Peruana (IIAP), Laboratorio de Parasitologia y Sanidad Acuicola, Carretera Iquitos-Nauta, Km 4.5, San Juan Bautista, Iquitos, 0784, Loreto, Peru.
Universidade Estadual do Maranhão (UEMA), Programa de Pós-graduação em Ciência Animal (PPGCA). Cidade Universitária Paulo IV, São Luís, São Luís, Maranhão, 65055-310, Brazil.
Syst Parasitol. 2024 Nov 7;102(1):1. doi: 10.1007/s11230-024-10200-0.
Three new species of Jainus Mizelle, Kritzky & Crane, 1968, are described parasitizing the gill filaments of Triportheus angulatus (Spix & Agassiz) (Characiformes: Triportheidae), an omnivorous fish endemic to the Amazon River basin. Jainus iquitensis n. sp. is characterized by the morphology of the vagina, which is bell-shaped, with a canal as a sclerotized tube and the morphology of hook pair VII, which in the new species presents an inflated base, a characteristic not observed in other congeners. Jainus loretoensis n. sp. is unique among Jainus species due to the morphology of its Y-shaped ventral anchors, with an arrow-shaped superficial root and a finger-shaped deep root. Jainus sardinae n. sp. is characterized by presenting a slender, small J-shaped tube with a sigmoid accessory piece and a ventral anchor that is Y-shaped, with inconspicuous finger-shaped deep root and superficial root with rounded ending with a chin-shaped projection. These findings add three new species to the previously reported two Jainus species from Peru.
三种新的 Jainus 米泽尔、克里茨基和克兰，1968 年，寄生在 Triportheus angulatus（Spix 和 Agassiz）（Characiformes：Triportheidae）的鳃丝上，Triportheus angulatus 是一种以亚马逊河流域为栖息地的杂食性鱼类。Jainus iquitensis n. sp. 的特征是阴道的形态，呈钟形，有一个作为硬化管的通道，以及第七对钩的形态，在新种中，钩的基部膨胀，这一特征在其他同属种中没有观察到。Jainus loretoensis n. sp. 是 Jainus 种中独一无二的，因为它的 Y 形腹锚的形态，具有箭头形的浅根和指形的深根。Jainus sardinae n. sp. 的特征是呈现出细长的 J 形小管，带有一个 S 形附属件和一个 Y 形的腹锚，其不明显的指形深根和浅根末端有一个圆形的下巴状突起。这些发现为之前报道的秘鲁的两种 Jainus 物种增加了三个新物种。
