taxonID	type	description	language	source
C42706563D605A5FA983098194EFDA69.taxon	description	Figs 4 – 11, 31, 32	en	de Freitas, Álvaro J. B., Bezerra, Carine A. M., Meneses, Yuri C., Justo, Marcia Cristina N., Viana, Diego C., Cohen, Simone C. (2021): Three new species of Urocleidoides (Monogenoidea: Dactylogyridae) parasitizing characiforms (Actinopterygii: Characiformes) in Tocantins River, states of Tocantins and Maranhão, and new record for U. triangulus in Guandu River, state of Rio de Janeiro, Brazil. Zoologia 38: 1-11, DOI: 10.3897/zoologia.38.e65001
C42706563D605A5FA983098194EFDA69.taxon	description	Description. Based on 137 specimens: 9 mounted in Gomori's trichrome and 128 mounted in Hoyers' medium: Body fusiform, delicate, 310 – 530 (363; n = 24) long, 63 – 140 (102; n = 27) wide. Tegument smooth. Cephalic region with 2 lateral lobes and 2 anterolateral slightly developed; four bilateral pairs of head organs. Eyespots absent; accessory chromatic granules present in cephalic area, Mouth subterminal, midventral; Pharynx muscular, spherical; esophagus short; two intestinal caeca, posteriorly confluent to gonads, lacking diverticula. Haptor sub-hexagonal, presenting ventral anchors connected by ventral bar and dorsal anchors connected by dorsal bar, 62 – 112 (94; n = 13) wide (Fig. 4). Ventral anchor with well-developed roots: protruding superficial root, rectangular in shape, deep root distally round, straight shaft and acute point, 26 – 44 (35; n = 43) long, base 13 – 26 (17; n = 31) (Fig. 8); dorsal anchor with developed roots, straight shaft and long point, 23 – 30 (28; n = 33) long, base 10 – 21 (12; n = 30) (Fig. 9). Ventral bar straight and robust, with anteromedian groove and slight protuberances at the end, 35 – 45 (39; n = 27) long (Fig. 10). Dorsal bar recurved, 32 – 40 (37; n = 14) long, with a long posteromedian projection, 9 – 15 (12; n = 24) long (Fig. 11). Seven pairs of marginal hooks present, ancyrocephaline distribution, five pairs ventral and two dorsal. Hooks similar in shape; pairs 1 and 5 slightly smaller than other pairs: each with protruded thumb, curved point, straight shank, and very short filamentous hook loop about 1 / 6 shank length (Fig. 7). Pair 1, 10 – 22 (16; n = 15) long, pair 2, 18 – 30 (23; n = 24) long, pair 3, 19 – 38 (24; n = 37) long, pair 4, 16 – 36 (24; n = 38) long, pair 5, 15 – 25 (19; n = 9) long, pair 6, 20 – 33 (29; n = 23) long, pair 7, 16 – 27 (18; n = 10) long. Copulatory complex comprising male copulatory organ (MCO) and non-articulated accessory piece. MCO with 2 – 3 counterclockwise rings, base with flange, 61 – 131 (95; n = 17). Accessory piece comprising a robust Y-shaped unit and a sheath-like unit (Figs 6, 31). Testes dorsal to germarium; seminal vesicle a distal dilation of vas deferens; single prostatic reservoir present. Germarium elongated (Fig. 4). Vaginal canal a highly sclerotized tube, which coils around vaginal sclerite, connected with seminal receptacle, located anteriorly to germarium; vaginal opening ventrolateral, sinistral; vaginal sclerite present, robust, sinistral, composed of straight rod distally hooked, with a short subterminal projection, 38 – 50 (41; n = 11) (Figs 5, 32). Eggs, Mehlis' glands and ootype not observed. Vitellaria present, distributed throughout the body, except in area of reproductive organs (Fig. 4).	en	de Freitas, Álvaro J. B., Bezerra, Carine A. M., Meneses, Yuri C., Justo, Marcia Cristina N., Viana, Diego C., Cohen, Simone C. (2021): Three new species of Urocleidoides (Monogenoidea: Dactylogyridae) parasitizing characiforms (Actinopterygii: Characiformes) in Tocantins River, states of Tocantins and Maranhão, and new record for U. triangulus in Guandu River, state of Rio de Janeiro, Brazil. Zoologia 38: 1-11, DOI: 10.3897/zoologia.38.e65001
C42706563D605A5FA983098194EFDA69.taxon	etymology	Etymology. the specific name refers to the scientific name of the host.	en	de Freitas, Álvaro J. B., Bezerra, Carine A. M., Meneses, Yuri C., Justo, Marcia Cristina N., Viana, Diego C., Cohen, Simone C. (2021): Three new species of Urocleidoides (Monogenoidea: Dactylogyridae) parasitizing characiforms (Actinopterygii: Characiformes) in Tocantins River, states of Tocantins and Maranhão, and new record for U. triangulus in Guandu River, state of Rio de Janeiro, Brazil. Zoologia 38: 1-11, DOI: 10.3897/zoologia.38.e65001
8676C93C2DF653D391B02643D6BCF6EA.taxon	description	Figs 12 – 21, 33, 34	en	de Freitas, Álvaro J. B., Bezerra, Carine A. M., Meneses, Yuri C., Justo, Marcia Cristina N., Viana, Diego C., Cohen, Simone C. (2021): Three new species of Urocleidoides (Monogenoidea: Dactylogyridae) parasitizing characiforms (Actinopterygii: Characiformes) in Tocantins River, states of Tocantins and Maranhão, and new record for U. triangulus in Guandu River, state of Rio de Janeiro, Brazil. Zoologia 38: 1-11, DOI: 10.3897/zoologia.38.e65001
8676C93C2DF653D391B02643D6BCF6EA.taxon	description	Description. Based on 51 specimens mounted in Hoyers' medium: Body fusiform, robust 195 – 402 (290; n = 15) long by 65 – 132 (103; n = 15) wide. Cephalic region with cephalic lobes poorly developed; four bilateral pairs of head organs. Eyespots absent; accessory chromatic granules dispersed in the cephalic region. Mouth subterminal, midventral; pharynx spherical, esophagus short; two intestinal caeca, confluent posteriorly to testes. Haptor sub-hexagonal, 60 – 105 (83; n = 15) wide (Fig. 34). Ventral anchor with superficial root elongated, round deep root knob-like, straight shaft and short point, 60 – 105 (83; n = 15) long, base 13 – 31 (22; n = 38) (Fig. 18). Dorsal anchor with well-developed elongated superficial root and inconspicuous deep root, short shaft and long point, 26 – 50 (36; n = 27) in length and base 15 – 30 (22; n = 28) (Fig. 19). Ventral bar straight, with an anteromedian groove and rounded extremities, anteriorly directed, 24 – 45 (33; n = 15) long (Fig. 17). Dorsal bar V-shaped, postero-median projection 19 – 38 (24; n = 12) long, with two variations: a slender or a more robust projection with lateral allae, 33 – 47 (40; n = 11) long (Figs 15, 16). Seven pairs of robust marginal hooks, five ventral and two dorsal, similar in shape, pairs 1 and 5 reduced in size, presenting curved point, dilated shank, composed of one subunit, protruded thumb, filamentous hook loop about 1 / 6 shank length (Figs 20, 21), pair 1, 7 – 20 (13; n = 30) long; pair 2, 18 – 51 (35; n = 23) long; pair 3, 17 – 37 (28; n = 20) long; pair 4, 15 – 27 (21; n = 19) long; pair 5, 9 – 14 (11; n = 17) long, pair 6, 14 – 42 (29; n = 22) long; pair 7, 6 – 43 (21; n = 21) long. Copulatory complex consists of male copulatory organ (MCO) and accessory piece, which serve as guide to MCO. Male copulatory organ about two counterclockwise rings, the proximal ring has a smaller diameter than the distal one, 54 – 100 (75; n = 18) long. Accessory piece not connected to MCO, situated at distal portion of the organ, consisting of a shaft with medial portion enlarged, with distal groove supporting MCO, 21 – 38 (28; n = 10) long (Figs 12, 33). Vagina ventral, funnel-shaped, consisting of a sclerotized tube, opening dorsally (Fig. 14). Vaginal sclerite composed of a long rod, longitudinally grooved, distal extremity hooked and subterminal short projection, 18 – 32 (23; n = 13) long (Fig. 13). Eggs, Mehlis' glands and ootype not observed. Vitellaria distributed throughout the body, absent in the region of reproductive organs.	en	de Freitas, Álvaro J. B., Bezerra, Carine A. M., Meneses, Yuri C., Justo, Marcia Cristina N., Viana, Diego C., Cohen, Simone C. (2021): Three new species of Urocleidoides (Monogenoidea: Dactylogyridae) parasitizing characiforms (Actinopterygii: Characiformes) in Tocantins River, states of Tocantins and Maranhão, and new record for U. triangulus in Guandu River, state of Rio de Janeiro, Brazil. Zoologia 38: 1-11, DOI: 10.3897/zoologia.38.e65001
8676C93C2DF653D391B02643D6BCF6EA.taxon	etymology	Etymology. The specific name refers to the similarity with Urocleidoides triangulus.	en	de Freitas, Álvaro J. B., Bezerra, Carine A. M., Meneses, Yuri C., Justo, Marcia Cristina N., Viana, Diego C., Cohen, Simone C. (2021): Three new species of Urocleidoides (Monogenoidea: Dactylogyridae) parasitizing characiforms (Actinopterygii: Characiformes) in Tocantins River, states of Tocantins and Maranhão, and new record for U. triangulus in Guandu River, state of Rio de Janeiro, Brazil. Zoologia 38: 1-11, DOI: 10.3897/zoologia.38.e65001
EC451902D40659DC8C83767A108042CB.taxon	description	Figs 22 – 30, 35, 36	en	de Freitas, Álvaro J. B., Bezerra, Carine A. M., Meneses, Yuri C., Justo, Marcia Cristina N., Viana, Diego C., Cohen, Simone C. (2021): Three new species of Urocleidoides (Monogenoidea: Dactylogyridae) parasitizing characiforms (Actinopterygii: Characiformes) in Tocantins River, states of Tocantins and Maranhão, and new record for U. triangulus in Guandu River, state of Rio de Janeiro, Brazil. Zoologia 38: 1-11, DOI: 10.3897/zoologia.38.e65001
EC451902D40659DC8C83767A108042CB.taxon	description	Description. Based on 15 specimens: 2 mounted in Gomori's trichrome and 13 mounted in Hoyers' medium. Body fusiform, robust, 200 – 317 (278; n = 8) long by 68 – 103 (89; n = 9). Cephalic lobes poorly developed; two pairs of eyespots, posterior pair larger than anterior; accessory chromatic granules dispersed in the cephalic region. Pharynx spherical; esophagus short; two intestinal caeca, posteriorly confluent to gonads, lacking diverticula. Haptor sub-hexagonal, 62 – 86 (68; n = 12) wide. Ventral anchor with developed superficial root and inconspicuous deep root, evenly curved shaft and point, 21 – 44 (33; n = 22) long and base 13 – 20 (17; n = 22) (Fig. 27). Dorsal anchor, smaller than ventral, with well-defined and long superficial root, shorter deep root, evenly curved shaft and robust point, passing from the level of tip of superficial root, 15 – 29 (22; n = 18) long and base 10 – 19 (13; n = 16) (Fig. 28). Ventral bar straight, with extremities directed toward posterior extremity, with a median projection arising from the middle portion of the bar, 23 – 34 (30; n = 9) long (Fig. 24). Dorsal bar straight, 25 – 41 (30; n = 6) long (Fig. 26). Marginal hooks present, dissimilar in shape: pairs 1 and 5 with straight shank, erected thumb and curved point; filamentous hook (FH) loop about 1 / 3 of shank length (Fig. 30), pairs 2 – 4, 6, 7 with dilated shank composed of two subunits, erected thumb and point, FH loop about 1 / 3 shank length (Fig. 29). Pair 1, 9 – 16 (13; n = 15); pair 2, 15 – 27 (19; n = 19); pair 3, 14 – 22 (18; n = 18); pair 4, 15 – 27 (17; n = 17); pair 5, 10 – 15 (13; n = 14), pair 6, 15 – 25 (20; n = 6); pair 7, 13 – 25 (20; n = 14). Copulatory complex composed of male copulatory organ (MCO), which is a straight tube, 23 – 40 (33; n = 14) long and by bifurcated accessory piece, serving as guide to MCO; accessory piece 41 – 70 (53; n = 15) long (Figs 22, 35). Gonads overlapping. Vaginal pore sinistral, vaginal vestibule, with a membranous cap at the aperture, tubular, expanded, 28 – 41 (35; n = 15), giving rise to vaginal canal (Figs 23, 36). Vaginal sclerite composed of a grooved rod, distal hook and a long subterminal projection, 22 – 35 (27; n = 11) (Fig. 25). Eggs, Mehlis' glands and ootype not observed. Vitelline follicles distributed throughout the body, except in the region of reproductive organs.	en	de Freitas, Álvaro J. B., Bezerra, Carine A. M., Meneses, Yuri C., Justo, Marcia Cristina N., Viana, Diego C., Cohen, Simone C. (2021): Three new species of Urocleidoides (Monogenoidea: Dactylogyridae) parasitizing characiforms (Actinopterygii: Characiformes) in Tocantins River, states of Tocantins and Maranhão, and new record for U. triangulus in Guandu River, state of Rio de Janeiro, Brazil. Zoologia 38: 1-11, DOI: 10.3897/zoologia.38.e65001
EC451902D40659DC8C83767A108042CB.taxon	etymology	Etymology. The specific name refers to the locality, Tocantins River.	en	de Freitas, Álvaro J. B., Bezerra, Carine A. M., Meneses, Yuri C., Justo, Marcia Cristina N., Viana, Diego C., Cohen, Simone C. (2021): Three new species of Urocleidoides (Monogenoidea: Dactylogyridae) parasitizing characiforms (Actinopterygii: Characiformes) in Tocantins River, states of Tocantins and Maranhão, and new record for U. triangulus in Guandu River, state of Rio de Janeiro, Brazil. Zoologia 38: 1-11, DOI: 10.3897/zoologia.38.e65001
