New record of endoparasitic Pseudempleurosoma haywardi (Monogenea: Dactylogyridae) in sillaginid fishes from Thailand, with updates on host range, zoogeography, and morphological variation Author Niyom, Nussaba Author Wiroonpan, Pichit Author Purivirojkul, Watchariya text Raffles Bulletin of Zoology 2023 2023-04-12 71 317 330 journal article 304907 10.26107/RBZ-2023-0024 77c92221-d812-4e11-b230-591ee980cea9 2345-7600 10830545 FEDCAC2C-3086-458A-9DA5-2069261103AB

Table 3. Measurement characteristics of the Pseudempleurosoma haywardi from the original description and current study. All measurements are given in micrometres (µm).

	Theisen et al. (2017)	Theisen et al. (2017)	Present study
ashown as length × width bshown as length
Fish host	Nibea soldado (Sciaenidae)	Otolithes ruber (Sciaenidae)	Sillago aeolus (Sillaginidae)
Site of infection	oesophagus/proximal stomach	oesophagus/proximal stomach	stomach
Study area	Pacific: off South Central Java, Indonesia	Pacific: off South Central Java, Indonesia	upper Gulf of Thailand
Bodya	588–1295 (971) × 181–361 (289)	582–937 (757) × 161–305 (230)	1000–2112 (1468) × 221–362 (294)
Opisthaptora	53–84 (66) × 101–142 (116)	58–88 (71) × 87–137 (119)	80–103 (91) × 139–167 (147)
Pharynxa	40–67 (52) × 40–63 (48)	44–64 (53) × 42–55 (47)	58–79 (73) × 54–88 (75)
Ovarya	44–101 (77) × 32–74 (55)	40–64 (52) × 28–62 (39)	60–99 (86) × 56–71 (61)
Testisa	39–95 (76) × 26–57 (41)	45–68 (56) × 29–47 (34)	58–100 (73) × 34–57 (40)
Dorsal anchorb	59–61 (60)	58–64 (61)	57–68 (61)
Dorsal bara	12–21(19) × 12–17 (15)	19–20 (20) × 12–17 (15)	17–22 (19) × 10–21 (14)
Ventral anchorb	14–16 (15)	14–18 (16)	15–17 (16)
Attached ventral barb	8–18 (11)	10–16 (13)	14–18 (16)
Detached ventral barb	17–21 (19)	13–20 (17)	20–22 (21)
Marginal hooksb	13–16 (15)	13–16 (15)	11–18 (14)
Male copulatory organ (MCO)b	29–51 (42)	33–52 (45)	53–57 (55)
Accessory piece of MCOb	14–23 (20)	5–19 (17)	20–23 (22)
Muscular genital atriuma	21–39 (29) × 20–31 (25)	20–26 (22) × 17–24 (20)	34–41 (37) × 30–32 (31)
Egga	56–72 (67) × 39–59 (50)	49–78 (68) × 33–59 (50)	57–97 (71) × 51–84 (64)
Egg’s filament	Absent	Absent	Absent