Ceratomyxa qingdaoensis, Zhao & Al-Farraj & Al-Rasheid & Song, 2015

Zhao, Yuanjun, Al-Farraj, Saleh A., Al-Rasheid, Khaled A. S. & Song, Weibo, 2015, Data on Ten New Myxosporean Parasites (Myxozoa, Myxosporea, Bivalvulida) from the Yellow Sea, China, Acta Protozoologica 54 (4), pp. 305-323 : 317

Ceratomyxa qingdaoensis sp. n. ( Fig. 3K–N ; Table 1)

This organism was incorrectly marked as Ceratomyxa qingdaoensis Zhao and Song, 2003 in the monograph “Pathogenic Protozoa in Mariculture” ( Song et al. 2003), which has not been described as a new species in that book. Thus, according to ICZN, the species should be an invalid name, hence, we “re-establish” and “re-describe” this form here.

Diagnosis: Trophozoites not observed; elongated crescent-shaped or arcuate mature spores with shell-valves often conical, exceeding in length the axial diameter of the spore; ends of valves rounded with a smooth surface, sutural line fine, 46.0 ± 2.8 (42.0– 48.0) µm in thickness, 6.5 ± 0.5 (6.0–7.0) µm in length, posterior angle slightly concave to straight (162–175°); two smaller spherical polar capsules positioned anteriorly in a plane perpendicular to the sutural line, 2.8 ± 0.2 (2.5–3.0) µm in diameter; fine sporoplasm with one binuclear located in the spore cavity; coelozoic.

Type host and site of infection: Urinary bladder of Argyrosomus argentatus Houttuyn, 1872 .

Type locality: Coastal waters of the Yellow Sea off Qingdao, China (36°08′N, 120°43′E). Salinity about 32‰, water temperature about 14°C .

Figures

Fig. 3. Schematic illustrations of Ceratomyxa spp. A–E – Ceratomyxa lomi sp. n.; A – mature spore viewed from the perspective of the cap- sule; B–D – lateral view of mature spore; E – plasmodium with two mature spores; F–J – Ceratomyxa lateolabrax sp. n.; F – plasmodium with two spores; G–J – lateral view of mature spore; K–N – Ceratomyxa qingdaoensis sp. n.; K–L, N – showing a lateral view of a mature spore; M – lateral view of an immature spore. Scale bars: 10 µm.