Two new and two already known species of genus Thelohanellus Kudo, 1933 (Myxozoa: Myxosporea: Bivalvulida) infecting Indian major carp fishes in Punjab wetlands (India)

Abstract

A survey of parasites of freshwater fishes in Harike, Kanjali and Ropar wetland of Punjab (India) revealed the presence of two new and two already known myxosporean species belonging to the genus Thelohanellus Kudo, 1933 parasitizing fins and gills respectively. Spores of the first species, T. kalavatae n. sp. measure 11.5 9 4.9 lm, elongately oval in valvular view having rounded blunt anterior end and rounded posterior end with lateral walls almost parallel to each other. Polar capsule is globular in shape and measure 5.2 9 3.3 lm in size. Anterior end of the polar capsule terminate into a small distinct neck. Spores of the second species, T. kalbensi n. sp. measure 9.5 9 4.9 lm, egg shaped to ovoid in valvular view having narrower anterior end with a prominent pore and broad rounded posterior end. Polar capsule is globular in shape with a short distinct tubular neck, measure 4.8 9 3.16 lm and occupies almost two-third of the spore body cavity. Spores of third species, T. avijiti Basu and Haldar, 2003 measure 10.1 9 6.6 lm, egg shaped in valvular having tapering, bluntly pointed anterior end and broad rounded posterior end. Polar capsule is rounded to subspherical in shape, measure 3.3 9 3.0 lm and is situated anteriorly. Spores of fourth species, T. gangeticus Tripathi, 1952 measure 13.3 9 4.8 lm, elongately pyriform in valvular view having tapering anterior end and rounded posterior end. Polar capsule is also elongately pyriform in shape measure 6.6 9 3.1 lm with thin neck and occupy half of the spore body cavity.

A report on two new myxozoan parasites infecting gills of fingerlings of Indian major carps cultured in nursery ponds in Punjab (India)

“…A large number of myxozoan species have been described infecting freshwater fishes in wetlands and aquaculture in Punjab (Singh and Kaur 2012a, b, c, d;Singh and Kaur 2014;Kaur 2014;Kaur et al 2014a, b;Kaur and Katoch 2014: Kaur and Gupta 2015Dar et al 2017). In the present study, two new species belonging to the genus Myxobolus Butschli infecting gill lamellae and gill filaments of Cirrhinus mrigala (Ham.)…”

Synopsis of the species of Thelohanellus Kudo, 1933 (Myxozoa: Myxosporea: Bivalvulida)

“…globulosa Singh & Kaur, 2012 In caudal fins. P small, white to pale-yellow, round, 0.7-0.8 in diameter; SP oval to spherical in valvular view, with blunt anterior and broadly-rounded posterior end, 11.7 (11.1-12.3) 9 7.9 (7.6-8.…”

“…West Bengal (India) Type-locality T. kalavatae Singh & Kaur, 2013 In caudal fins. P white, spherical or rounded, 0.6-0.8; SP elongate-oval, with bluntly-rounded anterior and rounded posterior end, 11.5 (11.0-12.0) 9 5.0 (4.3-5.5); PC globular, with small distinct neck, 5.2 (4.7-5.7) 9 3.3 (2.9-3.7); PF 5-6…”

“…kalbensi Singh & Kaur, 2013 In gills. P minute; SP ovoid, anterior end narrow, with a prominent pore, 9.5 (9.0-10.0) 9 4.9 (4.4-5.4); PC globular with short, distinct globular neck, 4.8 (4.4-5.2) 9 3.2 (2.8-3.4); PF 5-6…”

“…kanjalensis Singh & Kaur, 2012 In skin of snout. P small, white, round, 0.4-0.5 in diameter; SP elongate to oval, with acuminated anterior end with a distinct pore and rounded posterior end, with lateral sides nearly parallel to each other, 11.7 (11.4-11.8) 9 6.6 (6.4-6.8); PC, pyriform to oblong-oval, 7.5 (7.4-7.6) 9 3.3 (3.1-3.5); PF thick, ribbon-like, 4-6…”