Introduction

Members of the onchoproteocephalidean genus Phoreiobothrium Linton, 1889 infect carcharhinid and sphyrnid sharks. Although the Persian Gulf harbors a rich fauna of sharks, the taxonomic diversity of Phoreiobothrium in this region has been explored little. A new species of Phoreiobothrium is herein described from Carcharhinus sorrah (Müller et Henle) off southern Iran.

Methods

Cestodes were isolated from the spiral intestine of Carcharhinus sorrah, fixed in 10% seawater-buffered formalin, and stored in 70% ethanol. For morphological examinations, worms were stained using acetic carmine; a subset was prepared for SEM.

Results

Phoreiobothrium sorrahcola n. sp. is the first record of the genus from C. sorrah and most closely resembles Phoreiobothrium rozatii Alijanpour Darvishi et Haseli, 2019 recently described from the Gulf of Oman. However, it differs from P. rozatii in its possession of the rectangular, rather than triangular, bothridia, a longer cephalic peduncle (878–1300 vs 466–841), the longer axial prongs of lateral and medial hooks (B 56–80 vs 43–52; B’ 66–98 vs 46–62), and a greater maximum width of worm at level of scolex (302–415 vs 215–298).

Conclusions

With the description of this new species, three species of Phoreiobothrium have been reported so far from the southern waters of Iran. Phoreiobothrium now includes 17 valid species infecting 16 shark species.

中文翻译：

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来自斑尾鲨的一种新的Onchoproteocephalidean Cestode种，位于波斯湾的Carcharhinus sorrah（Mülleret Henle）。

介绍

头孢原脑线虫属林顿氏菌的成员，1889年感染了鲨鱼和鲨鱼。尽管波斯湾拥有丰富的鲨鱼动物区系，但该地区疏虫红藻的分类学多样性却鲜有研究。本文描述了来自伊朗南部海域的Carcharhinus sorrah（Mülleret Henle）的一种新的食腐细菌属。

方法

从est鱼的螺旋肠中分离出节，固定在10％的海水缓冲福尔马林中，并保存在70％的乙醇中。为了进行形态学检查，蠕虫用醋酸胭脂红染色；为SEM准备了一个子集。

结果

Phoreiobothrium sorrahcola ñ。sp。是C属的第一个记录。索拉（Sorrah）最接近阿曼湾（Phaseiobothrium rozatii） Alijanpour Darvishi et Haseli，最近在阿曼湾描述，2019年。然而，它不同于P。rozatii其所拥有矩形的，而不是三角形，bothridia，较长的头侧花梗（878-1300 VS 466-841），外侧和内侧钩（的更长的轴向叉乙56-80 VS 43-52; B” 66 –98与46–62），以及在scolex级别具有更大的蠕虫最大宽度（302–415与215–298）。

结论

通过对这种新物种的描述，到目前为止，据报道，距伊朗南部水域有3种细菌红细菌性杆菌。食虫杆菌目前包括17种有效物种，可感染16种鲨鱼。