Two new species of Dichelyne Jägerskiöld, 1902 (Nematoda: Cucullanidae) parasitising marine fishes in Iraq.

IF 1 4区医学 Q4 PARASITOLOGY

Systematic Parasitology Pub Date : 2023-12-01 Epub Date: 2023-07-13 DOI:10.1007/s11230-023-10107-2

Hassan A Fazaa, František Moravec, Atheer H Ali, Hussein A Saud

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Abstract

Recent examinations of some marine fishes from off the southern coast of Iraq revealed the presence of two new species of Dichelyne (Dichelyne) Jägerskiöld, 1902 (Nematoda: Cucullanidae), both intestinal parasites, namely: D. (D.) lethrini n. sp. from the smalltooth emperor Lethrinus microdon Valenciennes (Lethrinidae, Acanthuriformes) and D. (D.) iraqiensis n. sp. from the humphead snapper Lutjanus sanguineus (Cuvier) (Lutjanidae, Acanthuriformes). Specimens are described and illustrated based on light and scanning electron microscopical examinations. Dichelyne (D.) lethrini n. sp. is mainly characterised by the length of spicules (522 µm), presence of a dorsal caecum, location of deirids at the level of the posterior end of oesophagus and the post-oesophageal position of the excretory pore, number (10 pairs) and distribution of caudal papillae in the male, and the presence of two minute terminal spines on the female tail tip. Dichelyne (D.) iraqiensis n. sp. differs from the species of the subgenus Dichelyne mainly based on the absence of caudal spines, the presence of a dorsal caecum, the length of spicules (789-884 µm), the location of deirids and the excretory pore approximately at the same level, and the size of eggs (72-78 × 42-51 µm). These new species infecting marine fishes in Iraq represent new geographic records of cucullanids of the subgenus Dichelyne from fishes in marine waters off Iraq.

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寄生于伊拉克海洋鱼类的二新种Jägerskiöld，1902（线虫目：Cucullanidae）。

最近对伊拉克南部海岸的一些海鱼进行的检查显示，存在两种新的二氯虫（二氯虫）Jägerskiöld，1902（线虫目：Cucullanidae），这两种都是肠道寄生虫，即：D.（D.）lethrini n.sp.，来自小齿帝王Lethrinus microdon Valenciennes（Lethrinidae，Acanthuriformes）和D.（D。)产自座头笛鲷（Lutjanus sangeus（Cuvier））的iraqiensis n.sp.（笛鲷科，Acanthuriformes）。根据光镜和扫描电子显微镜检查对样品进行了描述和说明。Dichelyne（D.）lethrini n.sp.的主要特征是小刺的长度（522µm）、背盲肠的存在、食管后端水平的脱鞘位置和排泄孔的食管后位置、雄性尾乳头的数量（10对）和分布，以及雌性尾尖上存在两个微小的末端棘。Dichelyn（D.）iraqiensis n.sp.与Dichelyn亚属的物种不同，主要是因为没有尾棘，有一个背盲肠，针状物的长度（789-884µm），脱鞘和排泄孔的位置大致相同，卵的大小（72-78×42-51µm）。这些感染伊拉克海洋鱼类的新物种代表了伊拉克海域鱼类二丝亚属葫芦科的新地理记录。

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来源期刊

Systematic Parasitology 医学-寄生虫学

CiteScore

2.20

自引率

23.10%

发文量

审稿时长

6-12 weeks

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.