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Rhinoxenus bulbovaginatus Boeger, Domingues & Pavanelli 1995
No full text<i>Rhinoxenus bulbovaginatus</i> Boeger, Domingues & Pavanelli, 1995 <p> <i>Rhinoxenus bulbovaginatus</i> Boeger, Domingues & Pavanelli, 1995: 696-698, figs 1-8.</p> <p> HOST AND LOCALITY. — Nasal cavities of <i>Salminus brasiliensis</i> (Characidae), Rio Paraná, near Porto Rico, Paraná, Brazil.</p> <p> MATERIAL EXAMINED. — <b>Brazil.</b> Rio Miranda, Passo do Lontra, Mato Grosso do Sul, from <i>Salminus brasiliensis</i> (Characidae), 5.VIII.1998, voucher specimens (INPA 421 a-c; MNHN 155 HG-T 1 197-197 bis-198; MZUSP 5934 a-b; USNPC 95223).</p> <p>MEASUREMENTS. — Copulatory organ ring diameter 27 (21-37; n = 5); ventral anchor 121 (117-122; n = 5) long, 32 (30-32; n = 5) wide; dorsal anchor 129 (125- 132; n = 5) long; 5 (n = 5) wide; ventral bar 64 (60-67; n = 5) long; 12 (n = 5) wide; hook pair 1 37 (36-38; n = 2); hook pair 2 33 (30-35; n = 4); hook pair 3 48; hook pair 4 52; hook pair 5 45; hook pair 6 51; hook pair 7 49 (47-52; n = 3).</p> <p>REMARKS</p> <p> <i>Rhinoxenus bulbovaginatus</i> is characterized by possessing the point of the ventral anchor in the shape of a “fish-hook”; posterolateral expansions in the ventral bar for articulation to the ventral anchor; and vagina sclerotized with cup-shape vestibule.</p>Published as part of <i>Domingues, Marcus V. & Boeger, Walter A., 2005, Neotropical Monogenoidea. 47. Phylogeny and coevolution of species of Rhinoxenus (Platyhelminthes, Monogenoidea, Dactylogyridae) and their Characiformes hosts (Teleostei, Ostariophysi) with description of four new species, pp. 441-467 in Zoosystema 27 (3)</i> on page 451, DOI: <a href="http://zenodo.org/record/5402419">10.5281/zenodo.5402419</a>
Pseudomurraytrematoides Domingues & Boeger, 2008, n. gen.
No full textPseudomurraytrematoides n. gen. Synonymy: Murraytrematoides Yamaguti, 1963, partim. Diagnosis: With the characteristics of the subfamily. Type species: Pseudomurraytrematoides pricei (Caballero, Bravo-Hollis & Grocott, 1955) n. comb. from Cynoponticus coniceps (Jordan & Gilbert) (Muraenesocidae). Remarks: From the five species of Murraytrematoides recognized by Oliver (1987), only M. ditrematis (type species), M. lateolabracis and M. pricei were available for study. The comparative analysis of the reproductive structures and the cladistic analysis suggest that the studied specimens are not congeneric. Murraytrematoides pricei shows a simple male copulatory organ (MCO), accessory piece, and genital pore opening posterior to MCO. Murraytrematoides ditrematis and M. lateolabracis have MCO formed by nested tubes, genital pore opening anterior to the MCO, and the absence of accessory piece. In the cladistic analysis, M. pricei appears as basal within Diplectanidae, sister group of clade “C”, while M. ditrematis and M. lateolabracis appear in a polytomy with Anoplectanum (clade “V”). Thus, we propose to accommodate M. pricei, as Pseumurraytrematoides pricei n. comb., a member of the new subfamily. The generic name is from Greek (pseud/ o = false) and refers to the fact that members of this genus are not congeneric with Murraytrematoides, as presented herein.Published as part of Domingues, Marcus V. & Boeger, Walter A., 2008, Phylogeny and revision of Diplectanidae Monticelli, 1903 (Platyhelminthes: Monogenoidea), pp. 1-40 in Zootaxa 1698 on page 16, DOI: 10.5281/zenodo.18075
Rhinoxenus guianensis Domingues & Boeger 2005, n. sp.
No full textRhinoxenus guianensis n. sp. (Fig. 3 G-M) TYPE MATERIAL. — Holotype (CHIOC 36305); paratypes (CHIOC 36306 a-d; INPA 420; MNHN 154 HG-T1 196; USNPC 95222). ETYMOLOGY. — The specific epithet refers to the type locality from which the species was collected. TYPE HOST AND LOCALITY. — Nasal cavities of Curimata cyprinoides (Curimatidae), Iracoubo, Degrad Forian, French Guiana, 8-10.X.1996. DESCRIPTION Eyes usually present, equidistant, members of posterior pair closer than those of anterior pair; eyes granules elongate. Ventral anchor delicate, 115 (106-125; n = 5) long, base 19 (15-22; n = 3) wide, roots inconspicuous; base with sclerotized cap articulated to ventral bar; straight shaft, point short, truncated, golf-club shaped. Dorsal anchor delicate, slender, 98 (95-100; n = 5) long; with blunt proximal, distal ends, slightly sinuous shaft; each end with conspicuous sclerotized cap. Ventral bar 35 (34-38; n = 5) long. Hook pair 2 21 (20-23; n = 4) long, erect thumb, shaft, point evenly curved, proximal 2/3 of shank inflation; FH loop extending to near beginning of shank dilation. Hook pairs 1, 3-7 22 (20-24; n = 3) long, elongate, erect thumb, lightly curved shaft, short point, proximal 2/3 of shank inflated; FH loop extending to near beginning of shank dilation. Male copulatory organ a coiled tube with approximately 1.5 rings, 15 (14-17; n = 4) in diameter. Gonads, ootype, uterus, seminal receptacle not observed. Vagina sclerotized; with a subterminal loop, distally expanded; vestibule sclerotized, cup-shaped. Eggs not observed. REMARKS All specimens of Rhinoxenus guianensis n. sp. were mounted in Hoyer’s medium. Measurements and description of internal organs, therefore, are limited. The new species differs from all other congeneric species by possessing ventral anchors with straight shafts, short, truncated, club-shaped points and dorsal anchors with distal portions truncated and curved.Published as part of Domingues, Marcus V. & Boeger, Walter A., 2005, Neotropical Monogenoidea. 47. Phylogeny and coevolution of species of Rhinoxenus (Platyhelminthes, Monogenoidea, Dactylogyridae) and their Characiformes hosts (Teleostei, Ostariophysi) with description of four new species, pp. 441-467 in Zoosystema 27 (3) on pages 453-454, DOI: 10.5281/zenodo.540241
Rhinoxenus euryxenus Domingues & Boeger 2005, n. sp.
No full text<i>Rhinoxenus euryxenus</i> n. sp. <p>(Fig. 4)</p> <p>TYPE MATERIAL. — Holotype (CHIOC 36293); 7 paratypes (CHIOC 36294 a-g; INPA 435 a-c; MNHN 168 HG-T1 209-209 bis).</p> <p> ETYMOLOGY. — The specific ephitet is from Greek (<i>eury</i> = broad + <i>xen/o</i> = guest) and refers to the wide occurrence of this parasite within Serrasalminae.</p> <p> TYPE HOST AND LOCALITY. — Nasal cavities of <i>Serrasalmus marginatus</i> (Characidae), Baía da Medalha, Rio Paraná, Matogrosso do Sul, Brazil, 18. VI.1996.</p> <p> OTHER MATERIAL EXAMINED. — <b>Brazil.</b> Rio Uatumã, lago Tapana, Santa Anna, Amazonas, from <i>Serrasalmus gouldingi</i> (Characidae), 2-3.XI.1989, voucher specimens (CHIOC 36297). — Rio Miranda, Passo do Lontra, Mato Grosso do Sul, from <i>Serrasalmus marginatus</i> (Characidae), 31.XI.1996, voucher specimens (CHIOC 36299). — Baía da Medalha, Rio Paraná, Matogrosso do Sul, from <i>Serrasalmus marginatus</i> (Characidae), 18-19. VI.1996, voucher specimens (INPA 436 a-b; MNHN 169 HG-T 1 210-210 bis; USNPC 95237). — Rio Iatapu, lago Maracanã, Manaus, Amazonas, from <i>Serrasalmus rhombeus</i> (Characidae), 2.XI.1989, voucher specimens (CHIOC 36296; INPA 437 a-b; MNHN 170 HG-T 1 211; USNPC 95238). — Rio Paraná, near Porto Rico, Paraná, from <i>Serrasalmus spilopleura</i> (Characidae), 1992, voucher specimens (CHIOC 36298). — Rio Capucapu, near the confluence of the Rio Jatapu, Cachoeira das Garças, Amazonas, from <i>Serrasalmus striolatus</i> (Characidae), 31.XI.1989, voucher specimens (CHIOC 36295); same locality, from <i>Leporinus agassizii</i> (Anostomidae), 31.XI.1989, voucher specimens (INPA 438 a-b).</p> <p>COMPARATIVE MEASUREMENTS. — See Tables 7 and 8.</p> <p>DESCRIPTION</p> <p>Body fusiform, 607 (480-720; n = 10) long; greatest width 176 (150-210; n = 9) at body midlength. Cephalic lobes poorly developed; three pairs of cephalic organs; cephalic glands posterolateral to pharynx. Eyes equidistant; members of anterior pair smaller than those of posterior pair; eye granules elongate. Pharynx spherical, 42 (35-54; n = 11) in diameter. Haptor subtrapezoidal, 96 (64-115; n = 11) long, 115 (86-140; n = 11) wide. Ventral anchor with inconspicuous roots; base with sclerotized cap articulated with ventral bar; shaft recurved near midlength; point with saucer-like termination. Dorsal anchor with blunt proximal end covered by conspicuous sclerotized cap, straight shaft, tapered distal end. Ventral bar with expanded ends, irregularly sclerotized. Hook pair 2 robust, lying in small lobes on posterior trunk, with thumb erect, robust, shaft short, evenly short curved point; proximal 3/4 of shank inflated; FH loop extending to near beginning of shank dilation. Hooks pairs 1, 3-7 with erect thumb, delicate evenly curved shaft, short point; proximal 4/5 of shank long inflated; FH loop extending to near beginning of shank dilatation. Male copulatory organ a coiled tube with approximately 1.5 to 2 rings; copulatory ligament twisted. Testis elongate, 120 (n = 1) long, 25 (n = 1) wide; seminal vesicle fusiform; prostate in two dorsolateral fields. Germarium elongate, 63 (56-70; n = 2) long, 32 (29-37; n = 2) wide. Ootype, uterus not observed. Vagina sclerotized, distal portion with loop; vestibule sclerotized, cup-shaped, often everted (Fig. 4B). Seminal receptacle elongate. Vitellaria coextensive with cecae; vitelline commissure anterior to germarium. Egg not observed.</p> <p>REMARKS</p> <p> <i>Rhinoxenus euryxenus</i> n. sp. closely resembles <i>R. piranhus</i> based on the morphology of MCO and point of the ventral anchor. The new species, however, differs from <i>R. piranhus</i> by possessing ventral anchors with shafts strongly recurved near midlength (relatively straight shaft in <i>R. piranhus</i>) and lacking the small terminal protuberances on the ventral bar as described by Kritsky <i>et al.</i> (1988: fig. 4) for <i>R. piranhus</i>. <i>Rhinoxenus euryxenus</i> n. sp. appears ubiquitous to fishes belonging to <i>Serrasalmus</i>. The occurrence of <i>R. euryxenus</i> n. sp. on <i>Leporinus agassizii</i> (Anostomidae) is considered accidental.</p>Published as part of <i>Domingues, Marcus V. & Boeger, Walter A., 2005, Neotropical Monogenoidea. 47. Phylogeny and coevolution of species of Rhinoxenus (Platyhelminthes, Monogenoidea, Dactylogyridae) and their Characiformes hosts (Teleostei, Ostariophysi) with description of four new species, pp. 441-467 in Zoosystema 27 (3)</i> on pages 454-456, DOI: <a href="http://zenodo.org/record/5402419">10.5281/zenodo.5402419</a>
Chauhanellus boegeri Domingues & Fehlauer, 2006, n. sp.
No full textChauhanellus boegeri n. sp. (Figs 8–14) Type-host: Genidens barbus (Lacepède, 1803). Site: Gills. Type-locality: Baía de Guaratuba, Municipality of Guaratuba, State of Paraná, Brazil (01–XII– 1998). Other records: Genidens genidens (Cuvier, 1829), Baía de Guaratuba, Municipality of Guaratuba, State of Paraná, Brazil (05–I– 1994). Specimens deposited: Holotype, MZUSP 6354; 19 paratypes, CHIOC 36821 a–e, MZUSP 6355 a–k, USNPC 98919; 8 vouchers, CHIOC 36822 a–b, MZUSP 6356 a–d; USNPC 98920. Etymology: The specific name is in honor of Dr. Walter A. Boeger, Universidade Federal do Paraná, Brazil, in recognition of his valuable work on the Neotropical Monogenoidea. Comparative measurements: Table 1. Description: (Based on 20 adult specimens) Body 1028 (940–1100; n= 5) long, fusiform; greatest width 143 (125–163; n= 8) usually at level of germarium. Tegument smooth. Cephalic lobes moderately developed; three pairs of head organs; cephalic glands unicellular, posterolateral to pharynx. Eyes 4; posterior pair closer than anterior pair; accessory granules absent or few in cephalic area. Mouth subterminal, midventral; pharynx spherical to subovate, 57 (48–65; n= 7) in diameter; esophagus short; intestinal ceca two, nonconfluent, lacking diverticula. Haptor subspherical to hexagonal, 202 (173–234; n= 4) long, 133 (144–168; n= 4) wide. Anchors dissimilar; ventral anchor 71 (61–75; n= 4) long, base 61 (59–64; n= 4) wide, robust, with truncate superficial root, deep root expanded into wings, recurved shaft, short slightly recurved point. Dorsal anchor 85 (82–87; n= 4) long, base 35 (32–40; n= 3) wide, robust, with inconspicuous superficial root, expanded deep root, evenly curved shaft and point; anchor spine blunt. Ventral bar 30 (28–31; n= 3) long, 154 (139–166; n= 3) wide, with protuberances at each end for articulation with ventral anchor; posterior protuberances foot-like. Dorsal bar 28 (25–33; n= 3) long, 112 (103–120; n= 2) wide, V-shaped, with spines on both ends, elongate posteromedial process bent ventrally. Hooks similar; each 16 (14–18; n= 20) long, with depressed thumb, evenly curved, shaft, delicate point, shank without inflation, filamentous hook loop (FH loop) about half of shank length. Male copulatory organ sclerotised, a coiled tube of about 1 ¼ counterclockwise rings, 67 (61–75; n= 15) long, base with sclerotised margin, flattened end; proximal ring diameter 22 (19–26; n= 15). Accessory Genidens barbus N Genidens genidens N Body piece a variable sheath. Testis 206 (163–300; n= 8) long, 82 (72–101; n= 9) wide, pyriform; seminal vesicle sigmoid; prostatic reservoir ovate. Germarium 83 (72–96; n= 8) long, 60 (50–72; n= 8) wide, subspherical. Ootype not observed. Vaginal aperture dextral, vagina muscular. Seminal receptacle transversely ovate. Vitellaria coextensive with caeca. Eggs not observed. Remarks: Chauhanellus boegeri n. sp. resembles C. neotropicalis based on the general morphology of haptoral structures. However, C. boegeri can be distinguished from C. neotropicalis by the morphology of the male copulatory organ. The distal tip of the male copulatory organ is flattened in C. boegeri and acute in the C. neotropicalis. Further, the morphology of the germarium (ovate in C. boegeri, pyriform in C. neotropicalis) and the seminal receptacle (transversely pyriform in C. boegeri, sigmoid in C. neotropicalis) can be used to distinguish both species.Published as part of Domingues, Marcus V. & Fehlauer, Karin H., 2006, New species of Chauhanellus (Monogenoidea, Platyhelminthes) from the gills of Southern Atlantic marine catfishes (Siluriformes, Ariidae) of the Neotropical region, pp. 61-68 in Zootaxa 1365 on pages 65-68, DOI: 10.5281/zenodo.17478
Chauhanellus neotropicalis Domingues & Fehlauer, 2006, n. sp.
No full text<i>Chauhanellus neotropicalis</i> n. sp. <p>(Figs 1–7)</p> <p> <b>Type-host and type locality</b>: <i>Aspistor luniscutis</i> (Valenciennes, 1840)</p> <p> <b>Site:</b> Gills.</p> <p> <b>Type-locality</b>: Fish market, Municipality of Paranaguá, State of Paraná, Brazil (1996).</p> <p> <b>Specimens deposited</b>: Holotype, MZUSP 6357; 8 paratypes, CHIOC 36823 a–b, MZUSP 6358 a–d, USNPC 98921.</p> <p> <b>Etymology</b>: The specific name is related to the first record of <i>Chauhanellus</i> for the marine Neotropical region.</p> <p> <b>Description</b> (based on 9 adult specimens): Body 680 (n=1) long, fusiform, greatest width 131 (122–139; n=2) usually at level of germarium. Tegument smooth. Cephalic lobes moderately developed; three pairs of head organs; cephalic glands posterolateral to pharynx. Eyes 4; posterior pair slightly larger and closer than anterior pair; accessory granules absent in cephalic area. Mouth subterminal, midventral; pharynx ovate, 39 (36–43; n=2) in diameter; esophagus short; intestinal ceca two, nonconfluent, lacking diverticula. Haptor subspherical, 113 (108–118; n=2) long, 128 (113–144; n=2) wide. Anchors dissimilar; ventral anchor 54 (50–60; n=7) long, base 43 (30–50; n=7) wide, robust, with truncate superficial root, deep root expanded into wings, recurved shaft, short slightly recurved point. Dorsal anchor 62 (55–66; n= 7) long, base 30 (26–35; n=7) wide, robust, with inconspicuous superficial root, expanded deep root, evenly curved shaft and point; anchor spine blunt. Ventral bar 9 (n=2) long, 73 (72–74; n=2) wide, posterior ends with foot-like protuberances for articulation with ventral anchors. Dorsal bar, V-shaped, with spines on both ends, elongate posteromedial process. Hooks similar in shape, 16 (14–17; n=14) long, with erect thumb, evenly curved, shaft, point, shank without inflation, filamentous hook loop (FH loop) about half shank length. Male copulatory organ sclerotised, a coiled tube with 1 ¼ counterclockwise rings, 135 (110–155; n=8) long; male copulatory organ base with sclerotised margin, distal acute tip, proximal ring diameter 29 (23–39; n=4). Accessory piece, comprising a long sheath. Testis 58 (91 (74–108; n=2) long, 58 (55–60; n=2) wide, pyriform; seminal vesicle sigmoid; prostatic reservoir spherical. Germarium 70 (55–84; n=23) long, 30 (29–31; n=2) wide, elongate. Ootype not observed. Vaginal aperture dextral, vagina muscular. Seminal receptacle transversely pyriform. Vitellaria coextensive with caeca. Eggs not observed.</p> <p> <b>Remarks:</b> <i>Chauhanellus neotropicalis</i> <b>n. sp.</b> differs from all other congeneric species by the combined presence of the following features: (1) male copulatory organ, a coiled</p>Published as part of <i>Domingues, Marcus V. & Fehlauer, Karin H., 2006, New species of Chauhanellus (Monogenoidea, Platyhelminthes) from the gills of Southern Atlantic marine catfishes (Siluriformes, Ariidae) of the Neotropical region, pp. 61-68 in Zootaxa 1365</i> on page 63, DOI: <a href="http://zenodo.org/record/174788">10.5281/zenodo.174788</a>
Chauhanellus susamlimae Domingues, Soares & Watanabe, 2016, n. sp.
No full textChauhanellus susamlimae n. sp. (Figs. 15–21) Type-host: Sciades herzbergii (Bloch). Site of infection: Secondary lamellae of the gills. Type locality: Fishing village of Ajuruteua, Municipality of Bragança, State of Pará, Brazil (0° 49 ’ 31 ”N, 46 ° 36 ' 29 "W). Other records: Sciades herzbergii, Bombom Village, Municipality of Viseu, State of Pará, Brazil (01° 11 ’ 48 ”N, 46 °08’ 24 ”W); S. herzbergii, Fish market, Municipality of Bragança, State of Pará, Brazil; S. herzbergii, Furo da Ostra (0° 38 ’ 59 ”S, 47 ° 53 ’ 22,89917 ”W) municipality of Curuça, State of Pará, Brazil; S. herzbergii, Japerica Village (0° 51 ’ 28 ”S, 47 º 10 ’ 41,69 ”W), municipality of São João de Pirabas, State of Pará, Brazil; Sciades passany (Valenciennes), Fish market, Municipality of Bragança, State of Pará, Brazil. Prevalence of infection: 12 of 13 (92 %). Specimens deposited: Holotype, CHIOC 38251 a; 13 paratypes, CHIOC 38251 b–h, INPA 684, MPEG 073– 074; 26 vouchers, CHIOC 38252–38260, INPA 685–686, MPEG 075–079. Etymology: the species is dedicated to Prof. L.H.S. Lim in recognition for her work on monogenoids from Ariidae. Comparative measurements: Table 3. Description: Based on 15 adult specimens; 4 mounted in Gomori’s trichrome, 11 mounted in Hoyer’ medium. Body fusiform (Fig. 15), total length excluding haptor 435 (330–520; n= 4) long, 85 (70–90; n= 4) wide at level of germarium. Tegument smooth. Cephalic margin tapered; moderately developed terminal lobes; three bilateral pairs of head organs with rod-shaped secretion; cephalic glands unicellular, lateral to pharynx. Eyes 4, posterior pair closer than anterior pair; accessory granules absent or few in cephalic area, spherical. Mouth subterminal, midventral; pharynx ovate, 68 (62–75; n= 4) long, 46 (34–54; n= 4) wide; oesophagus, intestinal ceca obscured by vitellaria. Genital pore opening ventral, moved to lateral margin of the body, lateral to copulatory complex; genital atrium muscular. Testis post-germarial; testis dorsal to germarium. Testis saccate, 100 (79–117; n= 4) long, 44 (40– 48; n= 4) wide. Vas deferens apparently looping left of intestinal cecum, seminal vesicle a dilatation of vas deferens, sigmoid. One prostatic reservoir, pyriform, lying ventral lateral to copulatory complex. Copulatory complex comprising male copulatory organ, accessory piece; male copulatory organ, sclerotized tube, sigmoid 47 (43–55; n= 6) long, distal aperture acute. Accessory piece sclerotized, non-articulated with male copulatory organ comprising an elongated sheath (Fig. 16). Germarium 66 (63–74; n= 4) long, 35 (24–41; n= 4) wide, subspherical. Vagina comprising vaginal aperture with dextroventral opening; vaginal vestibule with soft tissue; vaginal canal short, muscular, sigmoid. Seminal receptacle saccate, distal end ascendant; Mehlis’ glands bilateral to ootype, some portions of Mehlis’ glands obscured by transverse vitelline commissures and seminal vesicle. Vitellaria dense throughout trunk, except in region of reproductive organs. Eggs not observed. Peduncle elongate. Haptor digitate, 116 (100–145; n= 4) long, 124 (95–175; n= 4) wide. Anchors dissimilar. Ventral anchor (Fig. 20), base 14 (10–19; n= 11) long, with divergent roots, truncate superficial root, 28 (25–32; n= 11) long, expanded deep root, 23 (25–32; n= 11) long; evenly curved shaft, point; point extending at level of tip of superficial root. Dorsal anchor (Fig. 21) 37 (35–40; n= 9) long, base 12 (11–14; n= 9) long, robust, with inconspicuous roots, slightly curved shaft, elongated point extending well past level of tip of inner base; anchor spine blunt. Ventral bar (Fig. 19) 6 (5–8; n= 9) long, 40 (35–44; n= 8) wide, broadly U-shaped, with short protuberances at each end for articulation with ventral anchor, anterior protuberance smaller than posterior protuberance. Dorsal bar (Fig. 18) 7 (6–8; n= 8) long, 42 (38–48; n= 8) wide, V-shaped, with bifurcation on both ends, acute anterior protuberance, rounded posterior protuberance; blunt posteromedial process. Hooks similar in shape (Fig. 17), 13 (12–15; n = 6) long, shank without inflation, erect thumb, lightly curved long shaft, delicate point, filamentous hook loop not observed. Remarks: The new species seems to be closely related to Chauhanellus boegeri Domingues & Fehlauer, 2006 and Chauhanellus neotropicalis Domingues & Fehlauer, 2006 by having dorsal bar with posteromedial process, hooks not proximally inflated, and a muscular vagina (unsclerotized). However, Chauhanellus susamlimae n. sp. can be easily distinguished from these species because it possesses a haptor with digitations, ventral bar with short posterior protuberances (posterior protuberances foot-like in C. boegeri and C. neotropicalis), and dorsal bar with bifurcation on both ends (non-bifurcated in C. boegeri and C. neotropicalis).Published as part of Domingues, Marcus V., Soares, Geusivam B. & Watanabe, Alana, 2016, Monogenoidea (Polyonchoinea: Dactylogyridae) parasitizing the gills of marine catfish (Siluriformes: Ariidae) inhabiting the Atlantic Amazon Coast of Brazil, pp. 301-326 in Zootaxa 4127 (2) on pages 308-311, DOI: 10.11646/zootaxa.4127.2.4, http://zenodo.org/record/25842
Whittingtonocotyle Neto, Rodrigues & Domingues, 2015, n. gen.
No full textWhittingtonocotyle n. gen. Type species. Whittingtonocotyle caetei n. gen. n. sp. from Hoplerythrinus unitaeniatus (Agassiz). Site. Gills. Type locality. Caeté River (North/Northeast Atlantic Basin; Caeté, Gurupi, Turiaçu sub-basin), municipality of Augusto Corrêa, Pará State, Brazil (1 ° 3 ’ 58.21 ” S 46 ° 40 ’ 3.65 ”W) collected in October 2013. Other species. Whittingtonocotyle jeju n. gen. n. sp. Other localities. Whittingtonocotyle caetei n. gen. n. sp. from Hoplerythrinus unitaeniatus from Guamá River (North/Northeast Atlantic Basin; Meruu, Acará, Guamá sub-basin), municipality of Irituia, Pará State, Brazil (01° 51 ’ 59.8 ” S, 47 ° 24 ’ 17.2 ”W) collected in July 2014, Whittingtonocotyle jeju n. gen. n. sp. from Hoplerythrinus unitaeniatus from Caeté River, municipality of Augusto Corrêa, Pará State, Brazil (1 ° 3 ’ 58.21 ” S 46 ° 40 ’ 3.65 ”W) collected in October 2013; and Guamá River, municipality of Irituia, Pará State, Brazil (01° 51 ’ 59.8 ” S, 47 ° 24 ’ 17.2 ”W) collected in July 2014. Etymology. The genus name is in honor of the late Dr. Ian D. Whittington, the South Australian Museum, in recognition of his valuable work on the Monogenoidea. Dr. Whittington passed away prematurely on 26 th October, 2014, after a long battle with cancer. Diagnosis. Body divisible into cephalic region, trunk, haptor. Tegument thin, smooth. Cephalic region with terminal ventral cephalic lobe poorly developed or absent. Bilateral pair of head organs opening subterminal to tip of cephalic lobes; cephalic glands lateral or postero-lateral to pharynx. Eyes present (2 pairs); granules elongate. Mouth subterminal, midventral; pharynx muscular, glandular; oesophagus short. Intestinal caeca 2, confluent posteriorly to gonads, lacking diverticula. Genital pore mid-ventral near level of cecal bifurcation. Genital atrium muscular. Gonads tandem or testis post-germarial; testis dorsal to germarium. Vas deferens looping left intestinal cecum; seminal vesicle sigmoid, looping dorso-ventrally before entering into the male copulatory organ. One prostatic reservoir, saccate; separated into two or three zones; one or two terminal areas densely stained. Copulatory complex comprising male copulatory organ, accessory piece; male copulatory organ sclerotized, spiral, clockwise; accessory piece sclerotized, non-articulated with the male copulatory organ. Vagina single; vaginal aperture dextro-dorsal, marginal, opening anteriorly or at mid-level of the trunk; vaginal vestibule muscular; vaginal canal heavily sclerotized, sigmoid or coiled. Seminal receptacle present, anterior to germarium. Egg ovate with short filament. Vitellaria well developed, coextensive with caeca. Haptor armed with, 14 hooks (7 pairs) with ancyrocephaline distribution (Mizelle 1936). Pair of ventral and dorsal anchors; anchors without well-defined roots. Ventral and dorsal bar; dorsal bar with anteromedial process. Parasites of gills of erythrinid fishes. Remarks. Whittingtonocotyle n. gen. is characterized by species possessing: (1) male copulatory organ sclerotized, spiral, clockwise, non-articulated with accessory piece; (2) prostatic reservoir separated into two/three zones with one or two terminal areas densely stained with Gomori’s trichrome; (3) vaginal aperture dextrodorsal; (4) anchors without well-defined roots; and (5) dorsal bar with anteromedial protuberance. Whittingtonocotyle n. gen. resembles Unilatus Mizelle & Kritsky, 1967, by having species with a male copulatory organ spiral, corkscrew like, non-articulated with accessory piece. The new genus differs from Unilatus by lacking small bulb on the distal medial portion of the male copulatory organ, by having dorsal and ventral anchor/bar complexes (anchor/bar complexes in the dorsal area of the haptor in Unilatus), and by the vagina opening dorsally on the right side (ventral, medial in Unilatus).Published as part of Santos Neto, João F., Rodrigues, Allan R. O. & Domingues, Marcus V., 2015, Proposal of Whittingtonocotyle n. gen. (Dactylogyroidea: Dactylogyridae), with the description of two new species from the gills of Hoplerythrinus unitaeniatus (Characiformes: Erythrinidae) in Brazil, pp. 191-200 in Zootaxa 3937 (1) on pages 192-193, DOI: 10.11646/zootaxa.3937.1.10, http://zenodo.org/record/23409
Anacanthorus circumspatulatus Santos Neto & Muriel-Cunha & Domingues 2019, sp. n.
No full textAnacanthorus circumspatulatus sp. n. (Figs. 26–28) Type-host: Erythrinus erythrinus (Bloch & Schneider), Erythrinidae. Site of infection: Gills. Type-locality: Igarapé Cururutuia—Caeté River, municipality of Bragança, Pará State, Brazil (1°4’44.55”S 46°44’18.54”W). Prevalence: 100% of one host examined. Mean intensity: 2 parasites per host infected. Other localities: Erythrinus erythrinus (Prevalence: 14% of seven hosts examined; Mean intensity: two parasites per host infected), Igarapé Maratininga—Moju River, Tailândia, Pará State (02º27’55.7”S 048º53’27.6”W). Specimens deposited: Holotype: CHIOC no. 40028 a. 1 paratype: CHIOC no. 40028 b. 2 vouchers: CHIOC nos. 40029 a–b. ZooBank registration: The Life Science Identifier (LSID) urn: lsid:zoobank.org:act: 37327D29-D790-4145- 8086-35543E65EE71. Etymology: The specific epithet derives from the Latin (circum = around + spatula = small blades), and refers to the ornament in the form of small blades distributed around the MCO. Comparative measurements: Table 6. Description: (Based on two specimens, mounted in Hoyer’s). Body fusiform 314 (283–346; n=2) long, excluding the haptor, 108 (100–116; n=2) wide at the height of germarium. Cephalic lobes developed; three groups of developed head organs; cephalic glands not observed. Two pairs of ocelli; anterior pair smaller than posterior pair; accessory granules ellipsoids, present or absent. Pharynx spherical 30 (28–32; n=2) long, 34 (32–36; n=2) wide. Esophagus not observed. Two intestinal caeca, confluent, posteriorly. Genital pore not observed. MCO 104 (101– 107; n=2) long, sclerotized, tubular, moderately long, with ornaments in the form of pointed and small interleaved blades distributed helically around the MCO, extending from the medial region to the distal region of the MCO (Fig. 26); accessory piece absent (Fig. 26). Seminal vesicle, prostatic reservoir, and gonads not observed. Peduncle short. Haptor sub-hexagonal 42 (30–54; n=2) long, 74 (56–93; n=2) wide. Similar 4A hooks 9 (n=1) long, with proximal portion dilated, comprising 1/3 of the hook length (Fig. 27). Seven pairs of similar hooks, blade slightly curved and robust 28 (n=1) long; shank with proximal dilatation comprising approximately ½ of its length; point short and curved; thumb slightly depressed and robust (Fig. 28). Hook filament delicate, extending proximally to the shank dilatation (Fig. 28). Remarks: Based on the MCO morphology, Anacanthorus circumspatulatus sp. n. is similar to Anacanthorus ataidei sp. n., since both species share the presence of a tubular and elongated MCO, with ornaments around it. However, they differ from each other by the hook morphology. Anacanthorus circumspatulatus sp. n. has the shank of hooks with a proximal dilatation comprising approximately ½ of the total shank length, a characteristic that is not observed in Anacanthorus ataidei sp. n., which has the shank of the hook without a proximal dilatation.Published as part of Santos Neto, João F., Muriel-Cunha, Janice & Domingues, Marcus V., 2019, New species of Anacanthorus (Dactylogyridae: Anacanthorinae) from the gills of Hoplerythrinus unitaeniatus and Erythrinus erythrinus (Characiformes: Erythrinidae) of the coastal drainage in the Eastern Amazon, Brazil, pp. 303-320 in Zootaxa 4615 (2) on pages 315-317, DOI: 10.11646/zootaxa.4615.2.4, http://zenodo.org/record/324470
Anacanthorus acrophallus Santos Neto & Muriel-Cunha & Domingues 2019, sp. n.
No full textAnacanthorus acrophallus sp. n. (Figs. 23–25) Type-host: Hoplerythrinus unitaeniatus (Spix & Agassiz), Erythrinidae. Site of infection: Gills. Type-locality: Igarapé Arinandeua—Guamá River, municipality of São Miguel do Guamá, State of Pará, Brazil (1°37’42.50”S 47°29’45.06”W). Prevalence: 66% of three hosts examined. Mean intensity: 1,5 parasites per host examined. Specimens deposited: Holotype: CHIOC no. 40024. 2 paratypes: CHIOC nos. 40025 a–b. ZooBank registration: The Life Science Identifier (LSID) urn: lsid:zoobank.org:act: DFCCF79B-0944-4AC9- A9DB-4391828B8C1B. Etymology: The specific epithet derives from the Greek (acro = point + phallus = penis) and refers to the MCO morphology, based on the presence of a pointed flap in its distal portion. Description: (Based on three specimens mounted in Hoyer’s). Body fusiform 468 (425–512; n=2) long, excluding the haptor, 117 (115–120; n=2) wide at the height of germarium. Four cephalic lobes developed; three groups of head organs; cephalic glands not observed. Two pairs of ocelli, posterior pair slightly bigger than the anterior pair; accessory granules not observed. Pharynx oval 45 (36–60; n=3) long; 34 (27–47; n=3) wide; oesophagus moderately elongated. Two intestinal caeca confluent and posterior to the gonads. Genital pore not observed. MCO 27 (26–29; n=3) long, 10 (9–11; n=3) wide, sclerotized and short, with a small pointed sinistral flap (ventral view) (Fig. 23); accessory piece absent (Fig. 23). Seminal vesicle, germarium, prostatic reservoir and testicles not observed. Uterus with anterior portion slightly sclerotized. Haptor 57 (50–65; n=3) long, 74 (47–95; n=3) wide. Peduncle short or elongated. Similar 4A hooks with portion posterior slightly dilated 14 (n=1) long (Fig. 24). Seven pairs of similar hooks 23 (22–24; n=3) long; blade relatively long and recurved, point short and curved, shank with proximal dilatation 6 (6–7; n=3) long, comprising 1/3 of the total shank length, thumb robust and depressed (Fig. 25). Hook filament delicate, extending until the half of the shank, proximal to the dilatation (Fig. 25). Remarks: Anacanthorus acrophallus sp. n. is similar to Anacanthorus scyphophallus sp. n. and A. brevicirrus due to the presence of a short and tubular MCO. However, Anacanthorus acrophallus sp. n. differs from Anacanthorus scyphophallus sp. n. mainly by the hook morphology since Anacanthorus acrophallus sp. n. has hooks with shank showing a proximal and robust dilatation, comprising 1/3 of the shank length, and a short, extended and slightly depressed thumb. On the other hand, Anacanthorus scyphophallus sp. n. has hooks shank with shank showing a proximal dilatation comprising ½ of the shank length, and a rounded and short thumb. Anacanthorus brevicirrus differs from Anacanthorus acrophallus sp. n. also by the hook morphology since it has a small bulb with a translucid spot in the proximal portion of the shank, which is not found in Anacanthorus acrophallus sp. n.Published as part of Santos Neto, João F., Muriel-Cunha, Janice & Domingues, Marcus V., 2019, New species of Anacanthorus (Dactylogyridae: Anacanthorinae) from the gills of Hoplerythrinus unitaeniatus and Erythrinus erythrinus (Characiformes: Erythrinidae) of the coastal drainage in the Eastern Amazon, Brazil, pp. 303-320 in Zootaxa 4615 (2) on page 315, DOI: 10.11646/zootaxa.4615.2.4, http://zenodo.org/record/324470
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