A novel myxosporean parasite Myxobolus klamathellus n. sp. (Cnidaria: Myxosporea) from native blue chub (Gila coerulea) in Klamath Lake, Oregon
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Blue chub, Gila coerulea Girard, 1856 is a freshwater cyprinid fish native to inland drainages of western North America. It has not previously been recorded as a host of any myxosporean parasite (Cnidaria: Myxosporea), despite myxosporeans being cosmopolitan in freshwater and marine fishes worldwide and sympatric with this host. Herein, we describe a novel myxosporean from subcutaneous cysts in native blue chub from Klamath Lake, Oregon. Myxospores were consistent with genus Myxobolus, being obovoid but compressed in thickness, length 14.3 ± 0.4 (13–15) μm, width 9.7 ± 0.4 (9–10) μm, thickness 7.7 ± 0.3 (7–8) μm; two polar capsules ovoid slightly dissimilar in size, length 6.4 ± 0.4 (6–7) μm, width 3.8 ± 0.3 (3–4) μm, with four (3–5) turns of the polar filament (tubule); capsule openings apical, one in each valve cell. The small subunit ribosomal DNA sequence was up to 97 % similar to Myxobolus spp. from other cyprinids from North America and Europe. Given the novel host, unique myxospore morphometrics, and DNA sequence, we describe this as Myxobolus klamathellus n. sp.
KeywordsBlue chub Gila coerulea Myxosporean parasite Myxosporea Myxobolus Klamath Lake
We thank Bill Tinniswood, ODFW, for collecting the fish. This research was supported by Research Grant No. IS-4576-13 from BARD, The United States-Israel Binational Agricultural Research and Development Fund.
Compliance with ethical standards
The authors declare that they have no competing interests.
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