Species of Hexabothriidae (Monogenea) may have extensive distribution ranges reflecting multiple host species: evidence from three new South African records Author Vaughan, David B. 0000-0002-4914-5003 Coastal Marine Ecosystems Research Centre, Central Queensland University, Rockhampton, Queensland, Australia. d.b.vaughan@cqu.edu.au Author Christison, Kevin W. 0000-0001-9879-3405 Department of Forestry, Fisheries and Environment, Aquaculture Innovation and Technology Development, Cape Town, South Africa. http: // orcid. org / 0000 - 0001 - 9879 - 3405 & Department of Biodiversity and Conservation Biology, University of the Western Cape, Cape Town, South Africa. Author Hansen, Haakon 0000-0003-1400-9615 Norwegian Veterinary Institute, Fish Health Research Group, Pb 64, N- 1431 Ås, Norway. http: // orcid. org / 0000 - 0003 - 1400 - 9615 Aquatic Parasitology Laboratory and Southeastern Cooperative Fish Parasite & Disease Laboratory, School of Fisheries, Aquaculture, & Aquatic Sciences, College of Agriculture, Auburn University, 559 Devall Drive, Auburn, AL 36832, USA. Author Bullard, Stephen A. 0000-0002-4914-5003 Department of Zoology, School for Environmental Sciences and Development, North-West University, Private Bag X 6001, Potchefstroom, 2520, South Africa. https: // orcid. org / 0000 - 0001 - 6681 - 7724 d.b.vaughan@cqu.edu.au text Zootaxa 2023 2023-03-10 5254 2 151 180 http://dx.doi.org/10.11646/zootaxa.5254.2.1 journal article 233754 10.11646/zootaxa.5254.2.1 5ec5feba-d119-472c-8d9e-a20b6dd9453a 1175-5326 7727255 3B5279F6-8157-4DB1-BFE5-8391D7330D53

TABLE 3. Comparative measures for Heteronchocotyle gymnurae

	Gymnura altavela (Neifar et al. 2001; re-measured = §)	Gy. altavela (Derouiche 2022; re- measured = §)	Gy. natalensis (Present study)
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a = Neifar et al. (2001) and Derouiche (2022) considered the longer dimension of the haptor (the width) to be its length; however, the shorter dimension shares the same anterior-posterior axis as the body-proper and hence is considered here to be the haptor length; b = circumference length labelled and illustrated by Neifar et al. (2001) as sclerite total length; sclerite width = shaft width (see Figure 1 of Neifar et al. 2001). Note: Neifar et al. (2001) numbered the haptoral sclerites as 1 (pair of hamuli), followed by pairs 2, 3 and 4, with a-b pairs labelled from right to left (see Figure 2 of Neifar et al. 2001). Please see Fig. 4 for current representation of sclerite numbering, following the convention of Boeger and Kritsky (1989) for pair 1 closest to the appendix, followed by pairs 2 and 3.
Body
Total length	4510 (4100–5250);	4245 (3900–5100)	3022 (2004–4180, n = 11)
Body-proper length (excluding haptor)	3660§	3490 (2752–3955, n = 3)§	2618 (1684–3682, n = 11)
Maximum width	809 (700–1200); 1038§	790 (600–990)	583 (414–752, n = 11)
Haptor length	597 (500–700)a; 524§	615 (600–750)	445 (320–602, n = 10)
Haptor width	1200 (1000–1500)a; 1411§	1100 (1000–1300)a	762 (588–989, n = 10)
Haptoral appendix length	252 (200–350); 295§	288 (197–443)	234 (170–290, n = 9)
Haptoral appendix width	177 (120–250); 213§	164 (103–230)	190 (145–250, n = 9)
Sucker of appendix length	118 (105–140); 161§	135	116 (101–129, n = 9)
Sucker of appendix width	59.3 (40–60); 71§	75	55 (44–70, n = 9)
Oral sucker length	253 (240–300); 184§	143 (104–186)	123 (96–164, n = 11)
Oral sucker width/diameter	190 (150–250); 243§	180 (130–240)	164 (142–201, n = 11)
Pharynx length	56.7 (50–62); 69§	65 (44–70)	62 (53–69, n = 12)
Pharynx width	60.4 (50–65); 65§	62 (40–75)	43 (37–52, n = 12)
Number of testes	37 (31–44); 40§	29 (22–40)	37 (27–42, n = 10)
Testis diameter	141§	49§	74 (50–107, n = 10)
Cirrus total length	1120 (1000–1400); 1114§	1184 (900–1492)	1196 (812–1685, n = 7)
Cirrus maximum width	59.5 (50–65); 114§	75 (49–78)	71 (55–105, n = 8)
Ovary length	611§	—	406 (334–525, n = 10)
False seminal receptacle length	97§	—	110 (76–130, n = 4)
False seminal receptacle width	28§	—	39 (33–48, n = 4)
Ôtype length	244§	—	255 (204–296, n = 7)
Ôtype width	42§	—	48 (36–55, n = 7)
Uterus length	—	—	1251 (896–1609, n = 6)
Egg length	108 (95–110)	109 (97–123)	110 (102–119, n = 12)
Egg width	39.5 (35–40)	39 (35–45)	45 (40–58, n = 12)
Hamulus
Total length	42.2 (40–47)	45 (34–55)	47
Total diameter	—	—	23
Hook point length	—	—	13
Hook shank length	—	—	12
Hook distal point width	—	—	2
Hook outer aperture angle	—	—	73°
Hook root-base angle	—	—	113°
Hook aperture	—	—	14
Hook shank-base width	—	—	4
Hook outer root-shaft length	—	—	36
Hook inner root-shaft length	—	—	31
Hook root-base width	—	—	22
Sucker sclerite 1a
Circumference length	610 (582–645)b; 638§	623 (600–648, n = 5)§	515 (486–540, n = 12)
Total length	290§	285 (279–294, n = 5)§	230 (211–248, n = 12)
Total diameter	178§	173 (168–177, n = 5)§	142 (132–152, n = 12)
Inner diameter	131§	123 (117–126, n = 5)§	107 (101–112, n = 12)
Shaft width	43.8 (35–45)b; 46§	48 (47–50, n = 5)§	39 (35–42, n = 12)
Shaft length	241§	234 (225–246, n = 5)§	192 (174–209, n = 12)
Hook-side curve length	82§	77 (76–79, n = 5)§	64 (57–70, n = 12)
Shaft-side curve length	96§	89 (83–94, n = 5)§	73 (67–84, n = 12)
Aperture	151§	150 (145–156, n = 5)§	119 (101–131, n = 12)
Hook length	176§	169 (162–179, n = 5)§	135 (121–148, n = 12)
Hook-curve length	30§	23 (20–24, n = 5)§	23 (18–27, n = 12)
Hook aperture	148§	141 (136–153, n = 5)§	114 (103–129, n = 12)
Hook base-width	42§	42 (40–46, n = 5)§	34 (29–38, n = 12)
Sucker sclerite 1b
Circumference length	421 (380–455)b; 433§	407 (339–448, n = 5)§	357 (337–376, n = 9)
Total length	182§	165 (138–186, n = 5)§	142 (130–156, n = 9)
Total diameter	144§	133 (116–147, n = 5)§	119 (110–126, n = 9)
Inner diameter	112§	102 (91–110, n = 5)§	93 (87–101, n = 9)
Shaft width	30.1 (25–32)b; 33§	30 (22–35, n = 5)§	26 (22–30, n = 9)
Shaft length	151§	136 (119–146, n = 5)§	124 (118–132, n = 9)
Hook-side curve length	48§	37 (35–38, n = 5)§	41 (36–50, n = 9)
Shaft-side curve length	61§	61 (44–76, n = 5)§	49 (44–57, n = 9)
Aperture	104§	79 (70–92, n = 5)§	62 (42–75, n = 9)
Hook length	123§	115 (95–125, n = 5)§	94 (78–105, n = 9)
Hook-curve length	16§	15 (12–18, n = 5)§	16 (12–19, n = 9)
Hook aperture	114§	103 (86–113, n = 5)§	82 (68–92, n = 9)
Hook base-width	25§	21 (16–28, n = 5)§	16 (14–22, n = 9)
Sucker sclerite 2a
Circumference length	372 (345–420)b; 394§	338 (295–367, n = 4)§	303 (287–326, n = 9)
Total length	177§	158 (142–169, n = 4)§	140 (132–148, n = 9)
Total diameter	125§	101 (87–119, n = 4)§	92 (79–105, n = 9)
Inner diameter	94§	73 (63–87, n = 4)§	68 (58–76, n = 9)
Shaft width	31.6 (30–36)b; 31§	28 (22–33, n = 4)§	26 (21–33, n = 9)
Shaft length	143§	128 (117–138, n = 4)§	121 (114–129, n = 9)
Hook-side curve length	35§	28 (27–29, n = 4)§	25 (22–34, n = 9)
Shaft-side curve length	56§	55 (40–67, n = 4)§	45 (41–53, n = 9)
Aperture	102§	83 (74–91, n = 4)§	78 (63–92, n = 9)
Hook length	93§	76 (62–85, n = 4)§	60 (52–68, n = 9)
Hook-curve length	15§	10 (8–12, n = 4)§	11 (9–17, n = 9)
Hook aperture	90§	76 (69–84, n = 4)§	54 (46–66, n = 9)
Hook base-width	26§	21 (18–23, n = 4)§	20 (18–22, n = 9)
Sucker sclerite 2b
Circumference length	604 (550–655)b; 631§	600 (572–633, n = 7)§	478 (448–499, n = 10)
Total length	299§	290 (280–302, n = 7)§	226 (207–245, n = 10)
Total diameter	203§	198 (180–206, n = 7)§	151 (142–160, n = 10)
Inner diameter	140§	141 (134–148, n = 7)§	107 (99–116, n = 10)
Shaft width	52.9 (50–60)b; 62§	55 (42–61, n = 7)§	45 (42–54, n = 10)
Shaft length	245§	238 (227–251, n = 7)§	190 (174–201, n = 10)
Hook-side curve length	71§	64 (57–69, n = 7)§	52 (45–59, n = 10)
Shaft-side curve length	77§	71 (64–78, n = 7)§	55 (40–63, n = 10)
Aperture	185§	175 (157–189, n = 7)§	145 (132–159, n = 10)
Hook length	165§	151 (145–158, n = 7)§	119 (111–132, n = 10)
Hook-curve length	28§	24 (22–26, n = 7)§	22 (16–27, n = 10)
Hook aperture	142§	130 (124–135, n = 7)§	106 (99–118, n = 10)
Hook base-width	45§	42 (38–46, n = 7)§	32 (26–38, n = 10)
Sucker sclerite 3
Circumference length	388 (365–430)b; 424§	357 (303–387, n = 5)§	309 (287–341, n = 9)
Total length	195§	169 (152–179, n = 5)§	142 (132–152, n = 9)
Total diameter	130§	111 (84–125, n = 5)§	93 (84–105, n = 9)
Inner diameter	95§	79 (58–89, n = 5)§	67 (60–74, n = 9)
Shaft width	32.9 (30–38)b; 36§	31 (26–36, n = 5)§	28 (23–34, n = 9)
Shaft length	157§	136 (121–142, n = 5)§	123 (114–128, n = 9)
Hook-side curve length	38§	27 (25–28, n = 5)§	25 (21–32, n = 9)
Shaft-side curve length	57§	55 (49–59, n = 5)§	46 (43–52, n = 9)
Aperture	107§	90 (81–97, n = 5)§	76 (64–91, n = 9)
Hook length	101§	81 (63–93, n = 5)§	61 (51–72, n = 9)
Hook-curve length	14§	10 (9–11, n = 5)§	11 (9–13, n = 9)
Hook aperture	93§	75 (60–88, n = 5)§	53 (43–66, n = 9)
Hook base-width	31§	26 (22–28, n = 5)§	21 (18–26, n = 9)