A New Ergasilus Nordmann, 1832 Species (Copepoda: Cyclopoida, Ergasilidae) from Gills of Two Freshwater Fishes at Al-Gharraf River, Southern Iraq | ||||
| Egyptian Journal of Aquatic Biology and Fisheries | ||||
| Article 35, Volume 28, Issue 6, November 2024, Page 633-643 PDF (951.04 K) | ||||
| DOI: 10.21608/ejabf.2024.392431 | ||||
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| Author | ||||
| Al-Sahlany et al. | ||||
| Abstract | ||||
| A survey of parasitic crustaceans on the gills of two freshwater fish species in Southern Iraq, specifically in the Al-Gharraf River (Thi Qar Province), was conducted from December 2022 to December 2023. The results led to the discovery of a new species: Ergasilus luteusi sp. nov., found on both the yellow barbell, Carasobarbus luteus (Heckel) (type host), and the Abu mullet, Planiliza abu (Heckel). This new species shares a guitar-shaped cephalothorax with 11 other species of Ergasilus; however, Ergasilus luteusi sp. nov. differs from all these species, except for E. iraquensis Amado, 2001, in the armature of legs 1-4. Ergasilus luteusi is very similar to E. iraquensis, but it can be distinguished by possessing three setae in the terminal segment of leg 5 (only two setae in E. iraquensis). The ratio of the second endopod segment to the first endopod segment of the antenna is 65% in E. luteusi, compared to 80% in E. iraquensis. Additionally, the length-to-width ratio of the caudal rami in the new species is 1.5:1, whereas it is 1.1:1 in E. iraquensis. | ||||
| Keywords | ||||
| Ergasilidae; Ectoparasites; Freshwater fish; Thi Qar Province; Iraq | ||||
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