Supplementary studies and molecular data on Henneguya cerebralis Pronin, 1972 (Myxozoa: Myxosporea), a parasite from Kosogol grayling Thymallus arcticus nigrescens in Mongolia.
Henneguya cerebralis Pronin, 1972 (Myxozoa) was described from Kosogol graylings Thymallus arcticus nigrescens Dorogostaisky, 1923 in Lake Khovsgol (Mongolia) in 1972. H. cerebralis was redescribed using critical morphological features and 18S ribosomal DNA (rDNA) gene sequence. Parasite infects cranial cartilage of fish host. Plasmodia are white rounded or ovoid, by 0.1 to 2mm in size, containing large quantities of spores. Spore body is ovoid or rounded, 11.18 ± 0.13 μm (range 9,71-12,56) in length and 9.06 ± 0.16 μm (range 7.22-10,06) in width with equal polar capsules (4.7×2.6 μm). The two caudal appendages have different lengths (one of them was shorter in 20%). Phylogenetic position inferred by 18S rDNA shows that H. cerebralis is closely related with H. zschokkei, H. nuesslini, H. salminicola and H. cartilaginis which are histozoic parasites of salmonid fish.
Institute of General and Experimental Biology of Siberian Branch RAS, Ulan-Ude, Russia. Electronic address: badmm_@rambler.ru.
Marina D-D
MD
Batueva
Alexey V
AV
Katokhin
Svetlana V
SV
Pronina
Nikolay M
NM
Pronin
D000818:Animals; D002356:Cartilage / Q000469:parasitology; D004275:DNA, Ribosomal / Q000737:chemistry / Q000235:genetics; D005393:Fish Diseases / Q000469:parasitology*; D058507:Host Specificity; D060106:Lakes; D008986:Mongolia; D055764:Myxozoa / Q000235:genetics / Q000302:isolation & purification* / Q000648:ultrastructure; D010273:Parasitic Diseases, Animal / Q000469:parasitology*; D010802:Phylogeny; D012337:RNA, Ribosomal, 18S / Q000235:genetics; D012487:Salmonidae / Q000469:parasitology*
D004275:DNA, Ribosomal; D012337:RNA, Ribosomal, 18S
Cartilage; Henneguya; Kosogol grayling; Lake Khovsgol; Myxosporea; Salmon species