Haliotrematoides nagibinae Kritsky, Tingbao &amp; Yuan, 2009, n. sp.
Creators: name: Kritsky, Delane C.
name: Tingbao, Yang
name: Yuan, Sun
Publisher: name: Zenodo
Year: 2009
Subjects: Biodiversity
Taxonomy
Animalia
Platyhelminthes
Monogenea
Dactylogyridea
Ancyrocephalidae
Haliotrematoides
Haliotrematoides nagibinae

description: <i>Haliotrematoides nagibinae</i> n. sp. (Figs. 55–60) <b>Type host and locality:</b> Mangrove red snapper, <i>Lutjanus argentimaculatus</i> (Forsskål) (Lutjanidae): Gulf of Tonkin (South China Sea) near Lingao, Hainan Province, China (20 o 0' N, 109 o 5' E), 20, 23 September 2003. <b>Other records:</b> <i>Lutjanus argentimaculatus</i> (Lutjanidae): Dapeng Bay near Nanao (South China Sea), Guangdong Province, China (23 o 25' N, 117 o 02' E), 24 July 2007; South China Sea near Zhanjiang, Guangdong Province, China, 13 July 2004. <b>Site of infection:</b> Gills. <b>Specimens studied:</b> Holotype, USNPC 101331; 11 paratypes, USNPC 101332, 101333, 101334, BMNH 2008.11.19.21-22, ZSU 2007072401-02; 2 voucher specimens, ZSU 2004071301–02. <b>Etymology:</b> This species is named for L. F. Nagibina, formerly of the USSR Academy of Sciences, Leningrad, Russia, in recognition of her work on the Monogenoidea. <b>Description:</b> Greatest width of body usually at level of testis or near midlength of trunk. Cephalic lobes well developed. Posterior eyespots with lenses. Pharynx subovate. Testis ovate; germarium variable. Seminal vesicle inconspicuous; MCO comprising proximal cup-shaped base, distal tubular shaft expanded proximally and quickly tapering to fine coil distally; coil counterclockwise, with 3–4 complete rings; prostate, prostatic reservoir not observed. Vaginal pore simple within tegumental indentation; seminal vestibule lightly sclerotized, with delicate internal ridges; vaginal canal delicate; seminal receptacle inconspicuous. Anchors similar, each with short depressed superficial root, inconspicuous deep root, heavy shaft with distal inner blade, straight recurved point with delicate superficial grooves; ventral anchor lacking basal perforation. Ventral bar variable, with two submedial pockets along anterior margin, shield-like projection on posterior margin often appearing perforated; dorsal bar rod-shaped, with ends slightly expanded. Hook distribution typical. <b>Measurements:</b> Body 338 (294–401; n = 5) long; greatest width 69 (58–82; n = 5). Haptor 70 (64–77; n = 5) long, 62 (60–67; n = 4) wide. Pharynx 21 (17–24; n = 5) wide. MCO 60 (51–68; n = 6) long. Ventral anchor 49 (45–53; n = 11) long; dorsal anchor 50 (46–54; n = 11) long. Ventral bar 26 (22–29; n = 7) long; dorsal bar 29 (24–33; n = 7) long. Hook 13 (11–14; n = 18) long. Germarium 32 (28–36; n = 2) long, 22 (21–24; n = 2) wide; testis 44–45 (n = 1) long, 23–24 (n = 1) wide. <b>Remarks:</b> <i>Haliotrematoides nagibinae</i> most closely resembles <i>H. noncalcaris</i>, <i>H. noncalcaroides</i> and <i>H. brachyflagellocirrus</i> in the general morphology of the haptoral armament and base of the MCO. It is easily distinguished from these species by possessing a fine coiled shaft of the MCO with 3–4 counterclockwise rings (fewer than 2 rings in <i>H. noncalcaris</i>, <i>H. noncalcaroides</i> and <i>H. brachyflagellocirrus</i>) and by having shafts of the ventral and dorsal anchors with distal inner blades (absent in the latter species). Other species of <i>Haliotrematoides</i> with blades on the inner surfaces of their respective anchor shafts include <i>H. hatzenbuehlerae</i>, <i>H. longihamus</i>, <i>H. potens</i>, <i>H. tainophallus</i>, <i>H. lanx</i>, <i>H. mediohamus</i>, <i>H. mediohamides</i>, and <i>H. prolixohamus</i>. However, <i>H. nagibinae</i> is easily distinguished from these species by having a delicate and coiled shaft of the MCO.
description: Published as part of <i>Kritsky, Delane C., Tingbao, Yang &amp; Yuan, Sun, 2009, Dactylogyrids (Monogenoidea, Polyonchoinea) parasitizing the gills of snappers (Perciformes, Lutjanidae): Proposal of Haliotrematoides n. gen. and descriptions of new and previously described species from marine fishes of the Red Sea, the eastern and Indo-west Pacific Ocean, Gulf of Mexico and Caribbean Sea, pp. 1-51 in Zootaxa 1970 (1970)</i> on page 25