Table 2.
List of Sphaerospora spp. identified in the fish hosts in present (bold) and previous studies accompanied by information on spore measurements (in μm) and other important features
| Fish host | Sphaerospora species | Origin | Organ | Spore | Polar capsule | Pseudoplamodium | Spore surface | Reference | ||
|---|---|---|---|---|---|---|---|---|---|---|
| L × T [L/T ratio] |
PL × PW | Polar filament coils | L × W | Development | ||||||
| Abramis brama | Sphaerospora abrami n. sp. | CZ | RT | 12.2–14.1 × 14.0–15.3 (13.4 ×14.6) [0.9] | Large: 6.6–7.6 × 5.4–7.2 (7.1 × 5.9); small: 5.1–6.8 × 3.8–5.3 (6.0 × 4.7) | 2–3 | 27.4–37.0 × 18.8–28 (32.3 × 22.3) | Disporic, envelope-like structure around sporoblast | Few small posterolateral protuberances on spore valves | Present study |
| Sphaerospora sp. | CZ, HU | RT | na | na | na | na | na | na | Present study | |
| Sphaerospora bramae El-Matbouli, Hoffmann & Kern, 1995 | GR | RT, GM | 4.4–5.4 × 4.3–5.4 (5 × 4.9) [1.02] | 2.1 | na | 10 | Disporic | Posterior end with 2 fine ridges on each spore valve | [39] | |
| Sphaerospora masovica Cohn, 1902 | CN | GB, IN | 8 × 8 [1.0] | na | na | 10–38 | Di- and polysporic | Smooth valve surface | [40] | |
| Sphaerospora sp. | CZ, SK | RT | na | na | na | na | na | na | [41] | |
| Sphaerospora sp. | HU | RT | na | na | na | na | na | na | [42] | |
| Blicca bjoerkna | Sphaerospora bliccae n. sp. | HU | RT | 9.7–11.1 × 9.3–10.1 (10.40 × 9.60 [1.1] | 3.9–4.7 × 3.8–4.2 (4.3 × 3.9) | 4–5 | na | na | Smooth valve surface, apical end split | Present study |
| Ctenopharygodon idella | Sphaerospora sp. | IT | RT | na | na | na | na | na | na | Present study |
| Sphaerospora carassii Kudo, 1919 | JP | GL | 8–13 [0.62] | 4–5 | na | 10–20 | Disporic | Smooth valve surface | [40, 59] | |
| Sphaerospora ctenopharyngodoni Chen, 1998 | CH | GL | 14.7 × 12.0 [1.23] | 5.9 × 4.8 | 4–5 | na | Mono- and disporic | Smooth valve surface | [75] | |
| Sphaerospora kwangtungensis Chen, 1998 | CH | GL | 9.5 × 7.6 [1.25] | 3.1 × 2.9 | 3–4 | na | na | 10–12 longitudinal striation | [75] | |
| Sphaerospora sp. | HU | KD | na | na | na | na | na | na | [42] | |
| Elops saurus | Sphaerospora elopi n. sp. | USA | RT | 5.8–6.6 × 8.9–10.5 (6.4 × 10.0) [0.64] | large: 3.2–4.0 × 2.7–3.3 (3.5 × 3.0); small: 3.0–3.9 × 2.6–3.2 (3.0 × 2.9) | na | 26.3–34.6 × 22.3–26.0 (30.5 × 24.2) | Disporic | Broad posterolateral bulges on each valve | Present study |
| Gobio gobio | Sphaerospora sp. | CZ | RT | na | 2.2–2.4 × 2.0–2.1 (2.3 × 2.1)b | na | 8.4–13.2 × 3.3–10.0 (10.2 × 6.3) | Monosporic | na | Present study |
| Sphaerospora gobionis Lom, Pavlovskova & Dyková, 1985 | SK | RT | 6.5–8.0 × 6.4–7.7 (7.1 × 6.9) [1.03] | 3.2–3.7 × 2.8–3.0 (3.4 × 2.9) | 3–4 | 15 | Disporic | Valve surface uneven | [41] | |
| Sphaerospora sp. | HU | BL, KD | na | na | na | na | na | na | [42] | |
| Lepomis gibbosus | Sphaerospora diminuta Li & Desser, 1985 | CN | RT | 5.0–8.5 (7.5) [1.0] | 2–3 (2.5) | 3–4 | na | Disporic | 3–4 (4–6 in [33]) striations from apical end toward posterolateral bulges on each valve | [35] |
| CN | RT, BL | 6.7–7.5 × 6.7–8 (7.0 × 7.6) [0.92] | 2.5–3.0 (2.9) | 4–5 | Up to 15 | [36] | ||||
| CZ | RT | 7.3–8.7 × 7.6–9.7 (8.1 × 8.6) [0.94] | 3.0–4.2 × 2.9–4.4 (3.7 × 3.4) | 3–4 | 13.6–16.6 × 6.6–11.2 (15.0 × 8.8) | Present study | ||||
| Sphaerospora ovophila Xiao & Desser, 1997 | CN | OV | 7.2–8.4 × 7.4–8.2 (8.2 × 7.9) [1.03] | 2.7–3.2 × 2.6–3.1 (3.0 × 2.8) | 6–7 | 12.5 | Monosporic | 5–6 ridges on surface of posterior end of each valve | [37] | |
| Leuciscus idus | Sphaerospora diversa n. sp. | CZ | RT | na | na | na | na | na | na | Present study |
| Leuciscus leuciscus | Sphaerospora diversa n. sp. | CZ | RT | 5.9–6.0 × 6.4–6.6 (6.0 × 6.5) [0.92] | 3.0 × 2.2–2.6 (3.0 × 2.4) | na | na | Disporic | Smooth valve surface | Present study |
| “Sphaerospora leuciscusi” (nomen nudum) of Longshaw (2004) [44] | EN | RT | 5.11–6.01 × 5.40–6.72 (5.56 × 5.87) [0.95] | 1.97–3.13 (2.35) | 3–4 | 14 | Monosporic | Smooth valve surface | [44] | |
| Sphaerospora rota Zaika, 1961a | RS | RT, UB, UR | 8.4–11.0 × 9.1–9.8 [na] | 4.2–5.6 × 2.8–4.2 | na | 12–14 | na | 3 small lateral protuberances, one posterior protrusion on each valve | [59] | |
| Lota lota | Sphaerospora sp. | IT | KD | na | na | na | na | na | na | Present study |
| Sphaerospora cristata Shulman, 1962 | RS | UB, UR | 9–10 × 8.3–10 [na] | 3.5–4.0 × 2.5–3.0 | na | na | na | 3 posterolateral denticles on each spore valve | [59] | |
| Rutilus rutilus | Sphaerospora rutili n. sp. | CZ | RT | 8.3–9.8 × 8.8–9.3 (8.8 × 8.9) [0.99] | 3.2–4.2 × 2.7–3.5 (3.7 × 3.2) | 3–4 | 13.7–24.0 × 7.2–17.6 (19.0 × 10.4) | Mono- and disporic | 3–4 small humps posterolaterally on each valve | Present study |
| Sphaerospora sp. | CZ | RT | na | na | na | na | na | na | Present study | |
| Sphaerospora carassii Kudo, 1919 | RS, HU, JP | GL | 8–13 [na] | 4–5 | na | 10–20 | Disporic | Smooth valve surface | [40, 59] | |
| Sphaerospora minima Kaschkovsky, 1974 | RS | UB | 6.0–7.7 × 5.4–6.0 [na] | 2.8–3.0 × 2.3–2.8 | na | na | na | Posterior end with spine-like ornamentations arranged in 3 lines | [49] | |
| “Sphaerospora ousei” (nomen nudum) of Longshaw (2004) [44] | EN | RT | 7.56–9.12 × 7.54–8.89 (8.46 × 8.21) [1.03] | 2.60–3.89 (3.22) | 3–4 | 18–21 × 10–11 | Mono- and disporic | Smooth valve surface | [44] | |
| Sphaerospora poljanskii Kulemina, 1969 | RS | RT | 9.5–10.0 × 9.0–10.0 [na] | 3.0–4.0 × 2.5–3.0 | na | na | na | Split at apical end, 2 triangular posterolateral projections | [48] | |
| Sphaerospora sp. 1 | CZ | RT | 8.5 × 8.2 [1.04] | 3.5 × 2.9 | 3 | na | na | na | [41] | |
| Sphaerospora sp. 2 | CZ | RT | 7 × 7 [1.0] | 3.3 × 2.9 | 5 | 14 | na | Smooth valve surface | [41] | |
| Sphaerospora sp. | CZ | RT | na | na | 5 | na | na | Ornate posterolateral valve end | [50] | |
| Sander lucioperca | Sphaerospora sp. | CZ | RT | na | na | na | na | na | na | Present study |
| Sphaerospora danubialis Molnár, 1991 | HU | RT | 9.5–11.0 × 8.5–10.0 (10.1 × 8.7) [1.16] | 4.0–4.8 (4.4) | 5–6 | 9–14 × 12–19 | Disporic | Rounded triangular shape, protruding tubercules | [60] | |
| Sphaerospora luciopercae Moshu, 1992 | ML, UK | OV | 7.2–9.6 × 5.0–7.0 (7.6 × 6.2) [1.23] | 3–4 × 2.5–3.6 (3.8 × 3.0 ) | 3–4 | 9.0–18.0 × 7.5–10.0 | Polysporic (4 or more) | Scale-shaped elevation at posterior end | [80] | |
| Scardinius erythrophthalmus | Sphaerospora dentata n. sp. | CZ | RT | 9.4–9.8 × 9.4–9.6 (9.7 × 9.4) [1.03] | 3.9–4.2 × 3.2–3.6 (4.0 × 3.5) | 4–5 | 17.6–22.1 × 10.5–12.5 (20.1 × 11.5) | Disporic | Multiple subtle posterolateral protuberances, 3 ridges at posterior end of spore valve | Present study |
| Sphaerospora gutta n. sp. | CZ | RT | 6.2–6.6 × 6.3–6.7 (6.4 × 6.5) [0.98] | 2.3–2.6 × 2.2–2.5 (2.5 × 2.3) | 4–5 | 5.3–18.8 × 4.6–12.4 (11.1 × 6.9) | Mono- and disporic | Smooth valve surface | Present study | |
| Sphaerospora sp. | HU | RT | na | na | na | na | na | na | Present study | |
| Sphaerospora scardinii El-Matbouli & Hoffmann, 1992 | GR | RT, UR | 5.97–7.25 × 5.31–6.30 (6.01 × 5.79) [1.04] | 1.8–2.93 × 1.82–2.24 (2.26 × 2.14) | 4–5 | 17.49 | Mono- and disporic | 3–4 fine ridges at posterior end | [43] | |
| Sphaerospora sp. | HU | BL, KD | na | na | na | na | na | na | [42] | |
| Sphaerospora sp. | HU | KD | na | na | na | na | na | na | [46] | |
| Sphaerospora sp. | IR | KD | na | na | na | na | na | na | [47] | |
| Silurus glanis | Sphaerospora sp. | CZ | RT | na | na | na | na | na | na | Present study |
| Sphaerospora siluri Molnár, 1993 | HU | RT | 6.6–6.9 × 6.7–6.9 (6.8 × 6.8) | 2.8–3.4 (3.1) | 5–6 | Monosporic | Triangular spore shape with two lateral ear-like protrusions | [97] | ||
| Squalius cephalus | Sphaerospora diversa n. sp. | CZ | RT | 6.3–6.7 × 7.0–7.9 (6.5 × 7.5) [0.87]b | 2.3–2.7 × 2.3–2.5 (2.5 × 2.4)b | na | 8.0–14.9 × 5.4–8.3 (12.1 × 7.0) | Disporic | na | Present study |
| Sphaerospora squalii n. sp. | CZ | RT | 6.1–7.1 × 6.2–7.0 (6.5 × 6.5) [1.0] | 3.0–3.4 × 2.7–3.0 (3.2 × 2.8) | 3–4 | 8.2–15.1 × 7.2–9.8 (10.1 × 8.3) | Mono- and disporic | Projected posterior end with subtle posterolateral protuberances | Present study | |
| Sphaerospora sp. | CZ, SK | RT | na | na | na | na | na | na | [41] | |
aFrom Leuciscus leuciscus baicalensis
bMeasurements from immature spores
Abbreviations: L length, W width, T thickness, PF polar filament, BL blood, GB gall-bladder, GL gills, GM glomeruli, IN intestine, KD kidney, OV ovary, RT renal tubules, UB urinary bladder, UR ureter, CH China, CN Canada, CZ Czech Republic, SK Slovakia, EN England, Great Britain, GR Germany, HU Hungary, IR Ireland, IT Italy, JP Japan, ML Moldova, RU Russia, UN Ukraine, na data not available