A new species of Loma (Microsporea) in shiner perch (Cymatogaster aggregata)

R. W. Shaw, M. L. Kent, M. F. Docker, A. M.V. Brown, R. H. Devlin, M. L. Adamson

Research output: Contribution to journalArticlepeer-review

21 Scopus citations


Loma embioticia n. sp. is described from the gills of shiner perch (Cymatogaster aggregata) from waters off Vancouver Island, British Columbia, Canada. Highest prevalence at a site was 15% and greatest intensity was 583 xenomas per fish. Xenomas averaged 0.13 mm in diameter (0.06-0.16 mm) and contained ovoid spores 4.8 x 2.6 (4.0-5.0 x 2.0-3.0) μm. Sporogonic stages were dispersed throughout the xenomas. The xenoma wall was smooth lacking invaginations into the cytoplasm: sporoblasts were not highly vacuolated, and the sporophorous vesicle formed before sporogony. In addition to differences in host and geographic location the new species is distinguished from Loma salmonae, the only other species in the genus known from British Columbia, by its internal transcribed spacer (ITS) ribosomal DNA sequence.

Original languageEnglish
Pages (from-to)296-301
Number of pages6
JournalJournal of Parasitology
Issue number2
StatePublished - Apr 1997


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