Myxobolus lieni (Nie & Li, 1973)

Zhou, Qingjie, Cao, Zeyi, Gao, Zhipeng, Xi, Bingwen & Liu, Kai, 2023, Morphological, histological and molecular characteristics of Myxobolus spp. (Cnidaria: Myxozoa) infecting the kidney of silver carp in Lake Taihu, Zoological Systematics 48 (2), pp. 159-168 : 161

3.1 Myxobolus lieni (Nie & Li, 1973)

Mature spores ( Figs 1a–b , 2a–b ) appeared suborbicular and slightly flat in frontal view, fusiform shaped in sutural view, measuring 7.33 ±0.22 (6.62–7.96) in length, 7.51 ± 0.14 (6.93–8.23) in width (n = 50), and 5.78 ±0.13 (5.5–6.08) in thickness (n = 10). Two equal polar capsules, pear-shaped with apophysis at top end, measuring 4.29 ± 0.34 (3.81–4.82) in length, 2.92 ± 0.13 (2.56–3.29) in width, and polar tubules coiled 4–5 turns. Type host. Silver carp Hypophthalmichthys molitrix (Valenciennes, 1844) . Host size. 22.0–35.0 cm. Site of infection. Histozoic , plasmodia found in the intraepithelium of renal tubular ( Figs 3a–c ). Prevalence. 60.2% (65/108). Locality. Lake Taihu, Wuxi , China. Vouch specimens. Infected tissues fixed in 4% buffered paraformaldehyde were deposited in Freshwater Fisheries Research Center, Chinese Academy of Fishery Science (accession no. MTR20181116)

Figures

Figure 1. Spores of Myxobolus lieni (Nie & Li, 1973) (A–B) and M. varius (Achmerov, 1960) (C–D) from Hypophthalmichthys molitrix, line drawings. Scale bars=2μm.

Figure 2. Spores of Myxobolus lieni (Nie & Li, 1973) (A–B) and M. varius (Achmerov, 1960) (C–D) from Hypophthalmichthys molitrix, digitized images. Scale bars=10μm.

Figure 3. Histopathological sections of Hypophthalmichthys molitrix kidney infected by Myxobolus spp. A–C. M. lieni (Nie & Li, 1973), in the renal tubules; D. M. varius (Achmerov, 1960), in the renal interstitium. Arrows indicate the plasmodia which contains 2–4 mature myxospores. Scale bars=10μm.