Luis Augusto Araújo Dos Santos Ruffeil, Elane Guerreiro Giese, Raul Henrique da Silva Pinheiro
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引用次数: 0
摘要
根据寄生于亚马逊河鱼proimelodus eigenmanni (Siluriformes)的标本，描述了一新种Spirocamallanus Olsen, 1952年(camallanae)。该新种唇囊有15-19条螺旋状脊，雄具尾鳍，由3对腔前乳头和6对腔后乳头支撑，尾端有2个末端尖刺，雌具数字状突起，尾端有2个小尖刺。该新种与一组新热带Spirocamallanus具有相同的特征，其特征是存在尾鳍，3对囊前乳头，不等的针状体以及雄性尾尖上存在刺。据报道，这一组的几个物种来自海洋环境，与亚马逊淡水中的Spirocamallanus delirae n. sp形成对比。在巴西的同系物中，被置于参考形态组的有S. rarus, S. freitasi, S. macaensis和S. halithophus，后两种是海洋鱼类的寄生虫。新种与S. rarus(3-4)、S. macaensis(12-15)和S. halithophus(10-15)的区别在于舌囊中的螺旋数，而与S. fretasi的区别在于前者的大针状体是两裂的，而新种的针状体是不分裂的。本文对delirae Spirocamallanus n. sp.的描述为新热带地区淡水siluriform鲶鱼寄生虫的生物多样性提供了新的数据。
Spirocamallanus delirae n. sp. (Nematoda, Camallanidae), a parasite of Propimelodus eigenmanni (Siluriformes: Pimelodidae) from the Brazilian Amazon.
A new species of Spirocamallanus Olsen, 1952 (Camallanidae), is described based on specimens found parasitizing Propimelodus eigenmanni (Siluriformes), an Amazonian fish. The new species has buccal capsule with 15-19 spiral ridges, males with caudal alae supported by 3 pairs of precloacal and 6 pairs of postcloacal papillae, and two terminal spikes on tail end, and females with a digitiform projection ending in two small spikes on tail end. The new species shares characteristics with a group of Neotropical Spirocamallanus that are characterized by the presence of caudal alae, 3 pairs of precloacal papillae, unequal spicules and the presence of spines on the tail tip of males. Several species of this group have been reported from marine environments, in contrast with Spirocamallanus delirae n. sp., which occurs in Amazon freshwaters. Among the Brazilian congeners placed in the referred morphological group are S. rarus, S. freitasi, S. macaensis, and S. halithophus, the last two being parasites of marine fishes. The new species differs from S. rarus (3-4), S. macaensis (12-15), and S. halithophus (10-15) based on the number of spirals in the buccal capsule and from S. fretasi based on the morphology of the larger spicule that is bifid in the former and undivided in the new species. The present description of Spirocamallanus delirae n. sp. adds new data to the biodiversity of parasites from freshwater siluriform catfish in the Neotropical region.
期刊介绍：
Systematic Parasitology publishes papers on the systematics, taxonomy and nomenclature of the following groups: Nematoda (including plant-parasitic), Monogenea, Digenea, Cestoda, Acanthocephala, Aspidogastrea, Cestodaria, Arthropoda (parasitic copepods, hymenopterans, mites, ticks, etc.), Protozoa (parasitic groups), and parasitic genera in other groups, such as Mollusca, Turbelleria, etc. Systematic Parasitology publishes fully illustrated research papers, brief communications, and fully illustrated major revisions. In order to maintain high standards, all contributors describing new taxa are asked to state clearly where the holotype is deposited and to make paratypes available for examination by the referees. It is recognized that, in some cases, this may cause problems for the authors, but it is hoped that by adhering to this rule authors may be protected against rapid synonymy of their taxa, and the types will be preserved for posterity.
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