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 Author Kritsky, Delane C. Department of Health and Nutrition Sciences, Campus Box 8090, Idaho State University, Pocatello, Idaho 83209, U. S. A. E-mail: kritdela @ isu. edu Research Center for Parasitic Organisms and State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-sen University, Guangzhou, 510275, Peoples Republic of China. E-mail: lssytb @ mail. sysu. edu. cn School of Life Sciences, South China Agricultural University, Guangzhou 510642, Guangdong Province, Peoples Republic of China Author Tingbao, Yang Author Yuan, Sun text Zootaxa 2009 2009-01-05 1970 1970 1 51 journal article 1175-5326 B10279CD-752E-4CC0-BA88-6F35B755B9E5 Haliotrematoides noncalcaroides n. sp. ( Figs. 17–23 ) Type host and locality: Mangrove red snapper, Lutjanus argentimaculatus (Forsskål) (Lutjanidae) : Dapeng Bay near Nanao, South China Sea, Guangdong Province , China ( 23 o 25' N , 117 o 02' E ), 24 July 2007 . Other records: Lutjanus argentimaculatus (Lutjanidae) : Gulf of Tonkin ( South China Sea ) near Lingao , Hainan Province , China ( 20 o 0' N , 109 o 5' E ), 20, 23 September 2003 ; South China Sea near Guangzhou , Guangdong Province , China , 6 July 2004 . Site of infection: Gills. Specimens studied: Holotype , USNPC 101324 ; 35 paratypes , USNPC 101325 , 101326 , 101327 , BMNH 2008.11.19.12-14, 2008.11.19.15-27, ZSU 2003092301-03; 32 voucher specimens, ZSU 2003092004-33, 2004070601-02. FIGURES 10–16. Haliotrematoides tainophallus Kritsky & Justine n. sp. from the dory snapper, Lutjanus fulviflamma , Great Barrier Reef , Australia. 10. Whole mount (composite, ventral view). 11. Hook. 12. Dorsal anchor. 13. Ventral anchor. 14. Dorsal bar. 15. Ventral bar. 16. Male copulatory organ (dorsal view). All figures are to the 25µm scale except Figure 10 (100µm scale) and Figure 16 (50µm scale). Etymology: The specific name (an adjective) reflects the apparent close relationship of H. noncalcaroides to H. noncalcaris as suggested by comparative morphologies of the respective haptoral armaments and copulatory structures. FIGURES 17–23. Haliotrematoides noncalcaroides n. sp. from the mangrove red snapper, Lutjanus argentimaculatus , South China Sea, China. 17. Whole mount (composite, ventral view). 18. Hook. 19. Male copulatory organ (ventral view). 20. Ventral bar. 21. Dorsal bar. 22. Ventral anchor. 23. Dorsal anchor. All figures are to the 25µm scale except Figure 17 (100µm scale). Description: Greatest width usually near body midlength or in posterior half of trunk. Cephalic lobes well developed. Each posterior eye with small lens often obscured by chromatic granules. Pharynx subspherical. Gonads pyriform. Seminal vesicle inconspicuous or absent; MCO comprising proximal cup-shaped base, tapered tubular shaft a loose counterclockwise coil of less than one complete ring. Vaginal pore simple within slight indentation of tegument, opening to elongate fusiform seminal vestibule, vaginal canal short, delicate, extending to inconspicuous seminal receptacle. Ventral anchor with poorly differentiated roots, comparatively short shaft, straight recurved point superficially grooved. Dorsal anchor with elongate superficial root, inconspicuous to nonexistent deep root, straight shaft, straight recurved point; distal shaft and point superficially grooved. Ventral bar with two submedial pockets along anterior margin; dorsal bar rod-shaped, with posteromedial expansion. Hook distribution typical, except hook pair 4 frequently shifted anterior to anchors. Measurements: Body 262 (210–338; n = 15) long; greatest width 58 (50–68; n = 16). Haptor 61 (52–68; n = 14) long, 60 (52–68; n = 13) wide. Pharynx 17 (14–19; n = 14) wide. MCO 28 (24–33; n = 7) long. Ventral anchor 32 (30–33; n = 12) long; dorsal anchor 43 (41–46; n = 12) long. Ventral bar 25 (21–27; n = 10) long; dorsal bar 30 (28–33; n = 14) long. Hook 12 (11–14; n = 25) long. Germarium 28 (22–36; n = 12) long, 19 (15–23; n = 11) wide; testis 32 (24–48; n = 16) long, 23 (17–27; n = 14) wide. Remarks: Haliotrematoides noncalcaroides closely resembles H. noncalcaris and H. brachyflagellocirrus , all parasites of the mangrove red snapper, L. argentimaculatus , in China . It differs from H. noncalcaris and H. brachyflagellocirrus by having smaller dorsal and ventral anchors with comparatively shorter shafts and a more evenly coiled shaft of the MCO.