Paradiplozoon yunnanensis n. sp. (Monogenea, Diplozoidae) from Sikukia gudgeri (Cyprinidae, Barbinae) in southwest China

Abstract

Paradiplozoon yunnanensis n. sp. (Monogenea, Diplozoidae) is described from the gills of Sikukia gudgeri Smith, 1931 (Cyprinidae) collected from Jinghong Basin, a tributary of the international Lancang-Mekong River. This is the first diplozoid species from S. gudgeri and its description increases the number of Paradiplozoon species recorded in China to 25. The new species is distinguished from congeners by a combination of morphological and molecular features. The anterior end of the median plate is thickened in the marginal area and a narrow rectangular trapeze spur connects to the anterior jaw through two separate anterior joining sclerites. The posterior end of the median plate sclerite is invaginated with a smooth strip-shaped posterior joining sclerite. Comparison of a newly obtained sequence of rRNA ITS2 with 18 other congeneric sequences from GenBank provides support for separation of the new species.

Review on the molecular study of the Diplozoidae: analyses of currently available genetic data, what it tells us, and where to go from here

“…Jirsová et al [ 32 ] and Fan et al [ 31 ] produced the most recent and complete phylogeny of diplozoid parasites, which do not differ markedly when compared to the revised topology presented here (Fig. 1 ).…”

“…This means that the sequence data for these species were likely obtained from the same cohort as the other taxonomic information used to describe the species and can thus be considered the holo- or paragenetype for the species [ 64 ]. Unfortunately, this is only the case for a handful of species [ 30 , 31 , 41 , 50 , 51 ], with all those produced before 2012 lacking genetic data for the type-material. Naturally, one could not expect the description of D .…”

Göynük Çayı (Bingöl, Türkiye)’nda Yaşayan ve Paradiplozoon bingolensis Civanova et al., 2013 (Monogenea: Diplozoidae) İnfestasyonuna Konak Olan Doktor Balık, Garra rufa (Cyprinidae)’nın Büyüme ve Üreme Özellikleri

“…Aside from the afore-mentioned parasite, there are other examples of diplozoids found in different fish species inhabiting varied water sources. In the other studies, Paradiplozoon ichthyoxanthon, Paradiplozoon hemiculteri, Paradiplozoon yunnanensis, and Paradiplozoon chazarikum were isolated from Labeobarbus aeneus (Avenant-Oldewage et al, 2014), Hemiculter leucisculus (Jirsova et al, 2018), Sikukia gudgeri (Fan et al, 2018), and Rutilus frisii kutum (Mohamamad and Mahsa, 2019), respectively.…”

Paradiplozoon cirrhini n. sp. (Monogenea, Diplozoidae), a gill parasite of Cirrhinus molitorella (Cyprinidae, Labeoninae) in South China

“… P. cirrhini n. sp. P. saurogobionis (Jiang et al , 1985) Jiang, Wu et Wang, 1989 P. megalobramae Khotenovsky, 1982 P. yunnanensis Fan et al , 2018 P. hemiculteri (Ling, 1973) Khotenovsky, 1985 P. opsariichthydis (Jiang, Wu & Wang, 1984) Jiang, Wu & Wang, 1989 P. yarkandense Arken et al, 2021 Hosts C. molitorella S. argentatus M. terminalis S. gudgeri H. leucisculus O. bidens S. eurystomus Source present study present study present study [ 13 ] [ 21 ] [ 22 ] [ 2 ] Body length 2813 (1376–6314) 1762–3654 6175–7375 1593 (1148–2344) 3153 (2320–4180) 3840 (2926–4457) 2130 (1100–3050) Body width 668 (443–1107) 592–997 962–1225 445 (211–626) 931 (729–1140) 991 (739–991) 690...…”

“…The Diplozoinae have five genera ( Diplozoon von Nordmann, 1832; Eudiplozoon Khotenovsky, 1984; Inustiatus Khotenovsky, 1978; Paradiplozoon Akhmerov, 1974 and Sindiplozoon Khotenovsky, 1981), and the Neodiplozoinae have two genera ( Afrodiplozoon Khotenovsky, 1981 and Neodiplozoon Tripathi, 1960) [ 25 ]. More than 70 diplozoid species have been reported worldwide, with 37 of them found in China: one species of Diplozoon , 26 species of Paradiplozoon , two species of Inustiatus , one species of Eudiplozoon , and seven species of Sindiplozoon [ 2 , 5 , 8 , 13 , 49 , 50 ].…”