Parvicapsula petuniae, Kodádková & Dyková & Tyml & Ditrich & Fiala, 2014

Kodádková, Alena, Dyková, Iva, Tyml, Tomáš, Ditrich, Oleg & Fiala, Ivan, 2014, Myxozoa in high Arctic: Survey on the central part of Svalbard archipelago, International Journal for Parasitology: Parasites and Wildlife 3 (1), pp. 41-56 : 49-50

Parvicapsula petuniae n. sp. ( Fig. 1D , Fig. 7 ).

Family Parvicapsulidae Shulman, 1953 .

Genus Parvicapsula Shulman, 1953 .

Type host: G. tricuspis (Reinhardt, 1830) , Arctic staghorn sculpin; average standard length 13.9 cm.

Other hosts: unknown.

Type locality: Greenland Sea , part of the Billefjorden , Isfjorden, Petunia Bay in the central part of Svalbard archipelago (78° 69 Ɩ N, 16° 53 Ɩ E) .

Other localities: none.

Description of sporogonic stages: disporic plasmodia, early plasmodia subspherical to oval, sometimes with filopodial projections; plasmodia located in renal tubules; for dimensions see Table 1.

Description of myxospores: spores asymmetrical with somewhat curved and wavy suture line, ellipsoidal in frontal view; two pyriform PCs of equal size; closely apposed, discharging in the same apical direction, 8 coils of polar filament; single distinct binucleate sporoplasm; measurements see Table 1.

Localization of sporogonic stages: coelozoic, renal tubules, urinary bladder.

Prevalence: 9% (2 of 22 kidney samples and of 17 urinary bladders).

Pathology: No material was available for evaluation the species pathogenicity.

Materials deposited: DNA sample (nr. 1423) stored in – 80 °C in the Laboratory of Fish Protistology, Institute of Parasitology, BC ASCR; SSU (GenBank accession No. KF874230) and LSU (GenBank accession No. KF874223) rDNA sequences.

Etymology: specific name refers to the type locality Petunia Bay.

Remarks: This is the first report of a Parvicapsula species from G. tricuspis . The shape and size of P. petuniae spores are similar to the asymmetrical spores of P. hoffmani infecting the intestinal epithelium of mullet ( India) ( Dorothy and Kalavati, 1993) and even more similar to P. karenii infecting the urinary bladder of a flatfish from the Yellow Sea ( Zhao et al., 2000). Nevertheless, the above mentioned morphologically similar Parvicapsula species differ in their host species preference and with different distributions from P. petuniae thus considering it to be a distinct species.

Figures

Fig. 1. Mature spores and plasmodia. (A-N) Myxospores and myxosporean plasmodial stages as seen in Nomarski differential interference contrast. Measurements are listed in Table 1. (A) Mature spore of Ceratomyxa porrecta. (B) Spores of Schulmania aenigmatosa with focus on polar capsules (left) and sinuous valve suture (right). (C) Plasmodial stages (left) and mature spore of Parvicapsula irregularis (right). (D) Mature spores of Parvicapsula petuniae. (E) Mature spore of Myxidium gadi. (F) Mature spore of Myxidium finnmarchicum. (G, H) Spores of Sinuolinea arctica in frontal (G) and sutural (H) view. (I, J) Plasmodial stages of Zschokkella siegfriedi. (K) Mature spores of Zschokkella siegfriedi. (L) Plasmodial stage of Latyspora-like organism. (M, N) Latyspora-like organism spores with focus on polar capsules and part of valve suture, respectively.

Fig. 7. Line drawing of Parvicapsula petuniae, sutural view. Scale bar = 10 µm.