Comparative Parasitology 68(2) 2001 - Peru State College

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238 COMPARATIVE PARASITOLOGY, <strong>68</strong>(2), JULY <strong>2001</strong> Table 1. Comparison of pertinent taxonomic information about Myxobolus gibbosus reported in the original species description and that observed in the present study. Host Locality Tissue site Pseudocyst Spore length Spore width Spore thickness Polar capsule length Polar capsule width Polar filament coils Herrick (1941)* Lepomis gibbosus Lake Erie Connective tissue of gill Round, 0.75 mm 10.6-12.3 9.8-12.3 6.5-8.2 5.7-7.4 3.3-4.1 8-12 * Based on fresh material in a hanging drop preparation. t Based on formalin-fixed material in asar wet mounts. to each other. It appears then that M. gibbosus is simply rare in this region. The dimensions of the preserved spores found in the present study are similar to those described by Herrick (1941) from fresh material (Table 1). It should be noted that dimensions of fixed spores are often smaller than those of fresh spores because shrinkage can take place during fixation. This means that fresh spores of M. gibbosus in Algonquin Park may be slightly larger than those described originally by Herrick (1941). Spores of other species of Myxobolus (M. dechtiari, M. magnaspherus, M. osburni, M. paralintoni, and M. uvuliferus) from L. gibbosus are presented for comparative purposes (Figs. 3—7). Each species has a distinct spore shape and specific tissue site in which it develops and is readily identified by these indicators. Myxobolus paralintoni (Fig. 4) has oval spores in frontal view and develops in the bulbus arteriosus of the heart (Hayden and Rogers, 1997; Cone and Overstreet, 1998). Myxobolus dechtiari (Fig. 5) has spores that are broadly pyriform in frontal view and develops in gill tissue (Cone and Anderson, 1977a). Myxobolus uvuliferus has slightly compressed spores in frontal view usually with the width greater than length, often has polar capsules dissimilar in the length, and develops in the connective tissue capsule surrounding the metacercaria of Uvulifer ambloplites (Hughes, 1927) Dubois, 1938 (Cone and Anderson, 1977a). Myxobolus osburni has round spores in frontal view and develops in the exocrine tissue of the pancreas (Cone and Anderson, 1977a). Myxobolus magnaspherus has round spores in frontal view that are huge, often 20 Copyright © 2011, The Helminthological Society of Washington Present studyt Lepomis gibbosus Lake Sasajewan Connective tissue of gill Round, 0.25 mm 11-14 10-11 — 6-7 3.5-4 8-11 |xm in diameter, and develops in connective tissue of the body, including the peritoneum (Cone and Anderson, 1977a). Taxonomic Key to the Species of Myxobolus Infecting Pumpkinseed Sunfish la. Spore length more than 16 jjim M. magnaspherus (Fig. 8) Ib. Spore length less than 16 |xm 2 2a. Polar capsules aligned more or less parallel - M. gibbosus (Fig. 9) 2b. Polar capsules converged anteriorly 3 3a. Spore circular in frontal view M. osburni (Fig. 10) 3b. Spore not circular in frontal view 4 4a. Spore width greater than spore length M. uvuliferus (Fig. 11) 4b. Spore width less than spore length 5 5a. Spore oval in frontal view M. paralintoni (Fig. 12) 5b. Spore broadly pyriform in frontal view M. dechtiari (Fig. 13) Discussion Ten species of Myxobolus Butschli, 1882 (Myxosporea) have been reported from L. gibbosus in North America (Herrick, 1936, 1941; Cone and Anderson, 1977a, b; Ingram and Mitchell, 1982; Li and Desser, 1985; Desser, 1993; Cone and Overstreet, 1998). The author has necropsied L. gibbosus from Algonquin Park and from Lake Erie and has to date encountered 6 of the 10 species, namely M. dechtiari, M. gibbosus, M. magnaspherus, M. osburni, M. paralintoni, and M. uvuliferus. The reports of Myxobolus cyprinicola Reuss, 1906, and Myxobolus poecilichthidis Fantham, Porter, and Richardson, 1939, from the brain and heart and from the gills, respectively, of L. gib-
CONE—DIAGNOSIS OF MYXOBOLUS 239 Figures 2-7. Photographs of spores in frontal view of species of Myxobolus known to parasitize Lepomis gibbosus in North America. 2. Myxobolus gibbosus (formalin-preserved). 3. Myxobolus paralintoni (formalin-preserved). 4. Myxobolus dechtiari (formalin-preserved). 5. Myxobolus uvuliferus (formalin-preserved). 6. Myxobolus osburni (formalin-preserved). 7. Myxobolus magnaspherus (fresh spore). Scale bar = 10 jjim and applies to all figures. bosus in Algonquin Park (Li and Desser, 1985) are considered misidentifications. Both of these species have similarities in tissue site and spore morphology to M. dechtiari and M. paralintoni and could have easily been confused with them. Li and Desser (1985) were apparently unaware of the study by Cone and Anderson (1977a) in nearby Ryan Lake. Copyright © 2011, The Helminthological Society of Washington
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Volume 68 July 2001 Number 2 Former
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Comp. Parasitol. 68(2), 2001, pp. 1
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CRISCIONE AND FONT—DEVELOPMENT OF
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length did not exceed 1.2 mm. By da
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Agamidae) from Australia. Journal o
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infection with O. javaensis (C. D.
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CRISCIONE AND FONT—VARIATION OF O
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CRISCIONE AND FONT—VARIATION OF O
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and Font, 2001), the indication of
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U.S.A. (42°59'N; 88°21'W). Ten to
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Table 2. Prevalence (Pr) and Rana c
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transmission dynamics of these 3 tr
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196 in G. W. Esch, A. O. Bush, and
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filariae of S. fallisensis was simi
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CARRENO ET AL.—DEER PARASITES IN
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ange of host species, but most coll
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Oestridae). Canadian Journal of Zoo
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Page 41 and 42: JOY AND TUCKER—SALAMANDER PARASIT
Page 43 and 44: south-central New York salamanders.
Page 45 and 46: AGUIRRE-MACEDO ET AL.—ENDOHELMINT
Page 51 and 52: Table 1. Helminths found in freshwa
Page 53 and 54: •o d c o U rH CB 3 C8 H °Q 0 W T
Page 55 and 56: da-Lopez et al., 1985; Leon, 1992;
Page 57 and 58: especie del genero Goezici Zeder, 1
Page 59 and 60: JALISCO SALGADO-MALDONADO ET AL.—
Page 61 and 62: SALGADO-MALDONADO ET AL.—HELMINTH
Page 63 and 64: Table 3. Continued. Number of hosts
Page 71 and 72: tudio helmintologico de Chirostoma
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Page 75 and 76: CURRAN ET AL.—TWO VIETNAMESE SNAK
Page 77 and 78: methods of fixation had not been kn
Page 79 and 80: tion) but were in independent later
Page 81 and 82: tylidae Poche: Part 2. A contributi
Page 83 and 84: KUZMIN ET AL.—RHABDIAS AMBYSTOMAE
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Page 89 and 90: Literature Cited Baker, M. R. 1978.
Page 91: Figure 1. Spores of Myxobolus gibbo
Page 95 and 96: Literature Cited Cone, D. K., and R
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Page 111 and 112: RESEARCH NOTES 257 Table 1. Mean wo
Page 113 and 114: , D. Iglesias, and B. Fried. 1986.
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Page 117 and 118: RESEARCH NOTES 263 Table 1. Helmint
Page 121 and 122: RESEARCH NOTES 267 Table 1. Numbers
Page 123 and 124: Kharchenko, V. A., G. M. Dvojnos, a
Page 125 and 126: id s „ ~ 55 **5 | «§ u ' *^ U
Page 127 and 128: (Nematoda). Except for H. tursionis
Page 129 and 130: RESEARCH NOTES 275 Figure 1. Cephal
Page 133 and 134: c Tj ;^ fn in ON o m ON "3 s ON gcd
Page 135 and 136: ticeps (Rudolphi, 1819), which also
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Page 141 and 142: Adenomera hylaedactyla, 21 Algansea
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Honorary Membership, 282 Life Membe
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Schrankiana larvata, 21 Schrankiana
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*Edna M. Buhrer "Mildred A. Doss *
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