Comparative Parasitology 67(1) 2000 - Peru State College

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78 COMPARATIVE PARASITOLOGY, <strong>67</strong>(1), JANUARY <strong>2000</strong> (proximal subunit expanded); 8) a sinistral vaginal aperture; and 9) absence of eyes. Of dactylogyrid genera with members infecting freshwater siluriforms in the Neotropics, characters defining Ameloblastella suggest a relationship with Vancleaveus Kritsky, Thatcher, and Boeger, 1986, and Philocorydoras Suriano, 1986. Members of these 3 genera share the characteristics of possessing overlapping gonads (testis dorsal to germarium), a ventral bar with a medial process, hook shanks comprised of 2 subunits (proximal subunit expanded), subspherical eye granules, and a dilation of the vas deferens to form the seminal vesicle. Ameloblastella differs from both Vancleaveus and Philocotydoras by the position of the vaginal aperture (ventral in Vancleaveus and Philocorydoras). It further differs from Philocorydoras by lacking eyes and having a coiled male copulatory organ (male copulatory organ an arced tube in Philocorydoras)', and from Vancleaveus by the absence of a basal fold on the superficial root of the dorsal anchor and an expanded distal subunit of the hook shank (both present in Vancleaveus) (see Kritsky et al., 1986; Suriano, 1986b). Of the 22 species of Urocleidoides considered incertae sedis by Kritsky et al. (1986), 2 of them are transferred to Ameloblastella as A. chavarriai (Price, 1938) comb. n. and A. mamaevi (Kritsky and Thatcher, 1976) comb. n. While A. chavarriai is the type species of Ameloblastella and defines the genus, A. mamaevi possesses all diagnostic features of Ameloblastella (see Kritsky and Thatcher, 1976). Suriano and Incorvaia (1995) described Vancleaveus platensis from the gills of the pimelodid, P. c. maculatus. This helminth is not a member of Vancleaveus because of the absence of basal folds on the superficial root of the dorsal anchor and the presence of a sinistral vaginal aperture (vaginal pore ventral in Vancleaveus spp.). The original description of the species indicates that it possesses all of the diagnostic features of Ameloblastella, except for the presence of a nonarticulated male copulatory organ and accessory piece. However, specimens of this species in the senior author's collection and collected from Pimelodus clarias (Lacepede) from the Rio de la Plata, Argentina, show a delicate articulation process attaching the base of the male copulatory organ to the accessory piece. The latter finding supports the transfer of V. platensis to Ameloblastella. Copyright © 2011, The Helminthological Society of Washington Ameloblastella chavarriai (Price, 1938) comb. n. (Figs. 1-9) REDESCRIPTION: Body 596 (408-742; n = 30) long; greatest width 113 (92-134; n = 33) usually in posterior trunk. Cephalic lobes poorly to moderately developed. Accessory eye granules in cephalic, anterior trunk regions. Pharynx ovate, 27 (24-30; n = 33) in greatest width; esophagus short to moderately long. Peduncle contracted, broad (ambient temperature formalin fixation) or elongate, narrow (hot formalin fixation); haptor subhexagonal, 84 (69-108; n = 28) wide, 72 (60-88; n = 29) long. Ventral anchor 33 (30-36; n = 22) long, with elongate superficial root, short deep root, slightly curved shaft, straight point; base 19 (16-21; n = 16) wide. Dorsal anchor 27 (23—31; n = 16) long, with well-developed roots, slightly curved shaft, elongate straight point; deep root protruding posteriorly from anchor base; anchor base 18 (17-20; n = 10) wide. Ventral bar 33 (29-37; n = 22) long, yoke-shaped, with posteromedial process usually bent anteriorly dorsal to bar. Dorsal bar 30 (26-34; n = 20) long, broadly Vshaped, with slightly enlarged ends. Hook with protruding truncate thumb, delicate point; hook 24 (20-27; n = 36) long; filamentous booklet (FH) loop extending to level of union of shank subunits. Male copulatory organ 141 (128-158; n = 8) long, a coil of about 2.5 rings; diameter of proximal ring 17 (15-20; n = 20); base of male copulatory organ with small sclerotized plate. Accessory piece 32 (27—38; n = 26) long, 25 (22—32; n — 22) wide, comprising 2 subunits; dextral subunit terminally acute, subtriangular, with expanded lateral margins; sinistral subunit L-shaped with flared termination, serving as guide for male copulatory organ. Testis elongate, fusiform (lateral margins indistinct); seminal vesicle large, fusiform, lying diagonally in median field of anterior trunk posterior to male copulatory organ; prostatic reservoir lying to right of seminal vesicle and body midline, posterior to male copulatory organ. Germarium an inverted elongate cone, 119 (84-166; n = 20) long, 35 (27—53; n = 21) wide; oviduct, ootype not observed; uterus delicate, infrequently with single egg; vagina a sclerotized tube; vaginal aperture on sclerotized papilla lying in small indentation of body margin; seminal receptacle
KRITSKY ET AL.—DACTYLOGYRIDS FROM MEXICAN CENOTES 79 Figures 1-9. Ameloblastella chavarriai (Price, 1938) comb. n. 1. Whole mount (composite, ventral). 2. Vagina. 3. Hook. 4. Copulatory complex (ventral). 5. Whole mount (fixed in hot formalin). 6. Ventral anchor. 7. Ventral bar. 8. Dorsal bar. 9. Dorsal anchor. All figures are to the 25-|j,m scale except Figures 1 and 5 (200-n.m scales). large, subovate. Egg 63 (n — 1) long, 30 (n = 1) wide, ovate, with short proximal filament. SYNONYMS: Cleidodiscm chavarriai Price, 1938; Urocleidoides chavarriai (Price, 1938) Molnar, Hanek, and Fernando, 1974. HOST AND LOCALITY: Gills of Rhamdia guatemalensis (Giinther); Ixin-ha Cenote, Yucatan, Mexico (20°37'14"N; 89°06'40"W) (11 July 1994; 11 May 1997; 26 October 1998). PREVIOUS RECORDS: Rhamdia rogersi (Regan) (type host), San Pedro Monies de Oca, Costa Rica (Price, 1938); R. quelen (Quoy and Gai- mard) and R. sebae (Valenciennes), Cumuto River near Coryal, Trinidad (Molnar et al., 1974). SPECIMENS STUDIED: 57 vouchers, USNPC 88963, HWML 15015, UNAM 3710, IPCAS M- 354, CHCM 313; 2 vouchers deposited by Molnar et al. (1974), USNPC 73178. REMARKS: Ameloblastella chavarriai (Price, 1938) comb. n. is the type species of the genus. Although the morphometrics of present specimens differ from those reported in the original description by Price (1938), our specimens pos- Copyright © 2011, The Helminthological Society of Washington
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January 2000 Number 1 Comparative P
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Comp. Parasitol. 67(1). 2000 pp. 1-
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children. This means, to most of th
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liese, 1995; Marcogliese and Cone,
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ural and human alterations of ecosy
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ternationally and locally; (2) be i
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justify the inclusion of parasites
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phy to understand faunal structure
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Eucestoda) coincided with the diver
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(Hoberg et al., 2000). These studie
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serve biodiversity effectively if e
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Clayton, D. H., and B. A. Walther.
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ham. 1996. Combining data in phylog
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schistosomes. Journal of Parasitolo
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Page 35 and 36: (Latreille, 1804) Brandt and Ratzeb
Page 37 and 38: COADY AND N]CKOL—PLAGIORHYNCHUS C
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Page 41 and 42: Threlfall, W. 1965. Helminth parasi
Page 43 and 44: strictive traits that were basicall
Page 45 and 46: Cement gland usually small with few
Page 47 and 48: AMIN ET AL.—REVISION OF THE GENUS
Page 49 and 50: AMIN ET AL.—REVISION OF THE GENUS
Page 51 and 52: 17. Trunk spines appearing continuo
Page 53 and 54: Comp. Parasitol. 67(1), 2000 pp. 51
Page 55 and 56: SMALES—POPOVASTRONGYLUS FROM MARS
Page 57 and 58: tion in a circular buccal capsule.
Page 59 and 60: strongylus pluteus differs from P.
Page 61 and 62: garoo from Kangaroo Island (Smales
Page 63 and 64: BURSEY AND GOLDBERG~-/l/VG7aSTOAM O
Page 65 and 66: Table 2. Parasite list for Onychoda
Page 67 and 68: phibian helminths in Japan. VI. Pse
Page 69 and 70: quadrant and 70° in male, 75° in
Page 71 and 72: increase in the number of cuticular
Page 75 and 76: Figures 1-3. Pseudoterranova decipi
Page 77 and 78: AMIN ET M^.—PSEUDOTERRANOVA IN MA
Page 79: the gill baskets of some hosts were
Page 83 and 84: er, and Boeger, 1986, and Amphoclei
Page 85 and 86: 1974); P. laticeps Eigenmann, Lagun
Page 89 and 90: MENDOZA-FRANCO ET SCIADICLEITHRUM F
Page 91 and 92: MENDOZA-FRANCO ET AL.—SCIADICLEIT
Page 93 and 94: MENDOZA-FRANCO ET M^.—SCIADICLEIT
Page 95 and 96: PEREZ-PONCE DE LEON ET AL.—DIGENE
Page 103 and 104: Table 2. Continued. Locality* (CNHE
Page 105 and 106: Table 2. Continued. Locality (CNHE
Page 107 and 108: casionally prey on tadpoles and ins
Page 113 and 114: Table 1. Extended. Ctenophorus reti
Page 115 and 116: Table 2. Extended. 3 '£ Oswaldofil
Page 117 and 118: Mediorhynchus orientalis Belopol'sk
Page 119 and 120: 4-5 spines each: 25.0-35.0 (31.4).
Page 121 and 122: Table 1. Previous helminth records
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Page 125 and 126: WEST ET AL.—RESEARCH NOTES 123 Ta
Page 127 and 128: 1987, and from these only a sample
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Comp. Parasitol. 67(1), 2000 pp. 12
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Table 2. Published records of helmi
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, , B. K. Sullivan, and Q. A. Truon
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were larvae. Still, we have conclud
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and their habitats. These low paras
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e eligible for election to office.
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New business. Presentation of notes
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Name: MEMBERSHIP APPLICATION 143 AP
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*Edna M. Buhrer *Mildred A. Doss *A
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