Comparative Parasitology 68(2) 2001 - Peru State College

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220 COMPARATIVE PARASITOLOGY, 68(2), JULY 2001 ville, Maryland, U.S.A., and the Harold W. Manter Laboratory (HWML) of the University of Nebraska State Museum, Lincoln, Nebraska, U.S.A. Description Results Ommatobrephidae Poche, 1926 Singhiatrema vietnamensis sp. n. (Figs. 1 and 2) Based on 5 specimens: Ommatobrephinae Poche, 1926. Body pyriform, elongate, 2.56 mm (2.41-2.61 mm) long, 0.76 mm (0.76-0.91 mm) wide at maximum width near posterior end of body, lacking tegumental spines but possessing minute interrupted longitudinal striae. Oral sucker with subterminal mouth, 170 (170—207) long, 189 (189-217) wide. Head crown having single row of 22—23 spines 31—56 long, arranged 11— 12 per side; row interrupted dorsally and ventrally. Prepharynx short, less than % length of pharynx; pharynx oval, 95 (95-106) long, 78 (78-106) wide. Esophagus 640 (547-640) long, 89 (80—105) wide. Ceca extending beyond posterior extent of testes. Acetabulum 290 (285- 329) long, 379 (363-407) wide, lying between anterior % and anterior J/2 of body. Ratio of widths of oral sucker to acetabulum 1:1.8-2.0. Testes 2, weakly (incompletely) lobed, lying opposite, located near terminal end of body, with anterior margins diverging from each other; left testis 292 (285-340) long, 217 (200=234) wide; right testis 279 (251-335) long, 234 (195-234) wide. Cirrus sac oval, 179 (179-227) long, 102 (102—110) wide, medial, lying between cecal bifurcation and acetabulum, containing large bipartite seminal vesicle, short pars prostatica, and short muscular ejaculatory duct; pars prostatica a short duct surrounded by prostatic cells at anterior of sac; external seminal vesicle lacking. Ovary pretesticular, spherical, 73 (73-95) in diameter, slightly dextral in 4 of 5 specimens, slightly sinistral in 1 specimen. Oviduct communicating with Laurer's canal, then forming ootype; Laurer's canal straight, directed dorsally from region of ootype, opening on dorsal surface at level of ovary; ootype surrounded by Mehlis' gland; Mehlis' gland compact, usually larger than ovary, consisting of relatively small cells; ootype receiving relatively long common vitelline duct from vitelline reservoir, communicating with uterus; uterus intercecal, postacetabular, with proximal portion a uterine seminal Copyright © 2011, The Helminthological Society of Washington receptacle and with distal portion a metraterm; metraterm thick walled, approximately length of cirrus sac, sinistral to cirrus sac, entering genital atrium anteriorly; genital atrium relatively small, ventral to anterior portion of cirrus sac in heatkilled specimens (directed anteriorly in coldkilled specimens when fixed under pressure with cirrus sac displaced anteriorly); genital pore opening medially or submedially near anterior region of cirrus sac in heat-killed specimens (near anterior acetabular margin in contracted specimens). Vitellarium consisting of 2 lateral bands of irregularly shaped follicles; bands lying ventral to ceca between posterior level of acetabulum and middle of testes, communicating to vitelline reservoir by left and right transverse main collecting channel; left channel about 195 long, right channel about 223-280 long; vitelline reservoir approximately 45—56 long, 111-195 wide. Eggs 95-117 long, 61-75 wide, with thickened knob at posterior end, with eyespots visible in miracidia of some specimens; eyespots 2, lightly pigmented in developing miracidia, darkly pigmented and fused in developed miracidia. Excretory vesicle Y-shaped, with triangular posterior bladder; main stem slender, medial, concealed by overlapping lobes of testes, extending anteriorly from bladder and bifurcating at anterior margins of testes; arms reaching anteriorly to approximate level just posterior to pharynx; excretory pore subterminal, opening on dorsal surface. Taxonomic summary TYPE HOST: Enhydris chinensis (Gray, 1842), rear-fanged water snake or Chinese water snake (Colubridae). Other host: Enhydris plumbea (Boie, 1827), rear-fanged water snake, rice paddy snake, or plumbeous water snake (Colubridae). TYPE LOCALITY: Ha Noi Province, Vietnam. Other localities: throughout Red River Delta, Vietnam, in Nam Ha, Thai Binh, Nam Ha, Nam Dinh, Hai Duong, and Hai Phong provinces. INFECTION SITE: Small intestine. PREVALENCE AND INTENSITY OF INFECTION: Ten of 43 specimens of E. chinensis (23%) each hosted 1-5 individual worms; 9 of 51 specimens of E. plumbea (18%) each hosted 1—3 worms. SPECIMENS DEPOSITED: Holotype USNPC No. 90037; paratypes USNPC No. 90038, HWML Nos. 15388 (E. chinensis), 15389 (E. plumbea).
CURRAN ET AL.—TWO VIETNAMESE SNAKE DIGENEANS 221 Figures 1-6. 1. Ventral view of holotype of Singhiatrema vietnamensis sp. n.; scale bar = 300 u.m. 2. Ventral view of specimen of 5. vietnamensis exposed to fresh water and slight pressure prior to and during cold fixation; scale bar = 300 (mm. 3. Ventral view of Szidatia taiwanensis; scale bar = 200 \nm. 4. Ventral view of S. taiwanensis showing detail of tribocytic organ; scale bar = 200 (Jim. 5. Lateral view of 5. taiwanensis; scale bar = 200 (Jim. 6. Ventral view of 5. taiwanensis exposed to fresh water prior to cold fixation; scale bar = 275 (xm. 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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Page 25 and 26: 196 in G. W. Esch, A. O. Bush, and
Page 27 and 28: Comp. Parasitol. 68(2), 2001, pp. 1
Page 29 and 30: filariae of S. fallisensis was simi
Page 33 and 34: CARRENO ET AL.—DEER PARASITES IN
Page 35 and 36: ange of host species, but most coll
Page 37 and 38: Oestridae). Canadian Journal of Zoo
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
Page 73: Comp. Parasitol. 68(2), 2001, pp. 2
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
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Page 89 and 90: Literature Cited Baker, M. R. 1978.
Page 91 and 92: Figure 1. Spores of Myxobolus gibbo
Page 93 and 94: CONE—DIAGNOSIS OF MYXOBOLUS 239 F
Page 95 and 96: Literature Cited Cone, D. K., and R
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Page 117 and 118: RESEARCH NOTES 263 Table 1. Helmint
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id s „ ~ 55 **5 | «§ u ' *^ U
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(Nematoda). Except for H. tursionis
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RESEARCH NOTES 275 Figure 1. Cephal
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c Tj ;^ fn in ON o m ON "3 s ON gcd
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ticeps (Rudolphi, 1819), which also
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Nieto reviewed recent advances in t
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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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