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 guttati ( García-Vargas, Fajer-Ávila & Lamothe-Argumedo, 2008 ) n. comb. ( Figs. 104–109 ) Syn. Haliotrema guttati García-Vargas, Fajer-Ávila & Lamothe-Argumedo, 2008 Source of current specimens: Spotted rose snapper, L. guttatus (Steindachner) (Lutjanidae) : Taboga Island, Panama ( 8 o 49'N , 79 o 34'W ), 24 May 2007 ; Perlas Archipelago, Panama ( 8 o 22'N , 79 o 01'W ), 24 May 2007 . Type host and locality: Spotted rose snapper, Lutjanus guttatus (Lutjanidae) : Pacific coast off Mazatlán, Sinaloa , Mexico ( 23 o 29'N , 106 o 36'W ). FIGURES 98–109. Haliotrematoides spp. from the spotted rose snapper, Lutjanus guttatus , Panama. FIGURES 98–103. Haliotrematoides plectridium Kritsky & Mendoza-Franco n. sp. 98. Ventral bar. 99. Dorsal bar. 100. Ventral anchor. 101. Hook. 102. Dorsal anchor. 103. Male copulatory organ (ventral view). FIGURES 104–109. Haliotrematoides guttati ( García-Vargas, Fajer-Ávila & Lamothe-Argumedo, 2008 ) n. comb. 104. Dorsal anchor. 105. Ventral anchor. 106. Hook. 107. Dorsal bar. 108. Ventral bar. 109. Male copulatory organ (ventral view; distorted from coverslip pressure). All figures are to the 25µm scale. Site of infection: Gills. Specimens studied: Paratype , HWML 48570 ; 2 voucher specimens, HWML 48571 ; 2 voucher specimens, USNPC 101370 , 101371 . Previous records (as Haliotrema guttati ): Lutjanus guttatus : Pacific coast off Matzatlán, Sinaloa , Mexico , by García-Vargas et al. (2008) ; Cruz de Huanacaxtle, Nayarit , Mexico , by García-Vargas et al. (2008) . Measurements: Body 571 (529–613; n = 2) long; greatest width 101 (88–114; n = 2). Haptor 103 (96–110; n = 2) long, 92 (85–98; n = 2) wide. Pharynx 34 (33–35; n = 2) wide. MCO 41 (38–44; n = 2) long. Ventral anchor 45 (44–46; n = 2) long; dorsal anchor 55 (50–60; n = 2) long. Ventral bar 45–46 (n = 1) long; dorsal bar 44–45 (n = 1) long. Hook 13 (12–14; n = 10) long. Germarium 46–47 (n = 1) long, 27–28 (n = 1) wide; testis 70–71 (n = 1) long, 45–46 (n = 1) wide. Remarks: This species was recently described from spotted rose snapper in Mexico as Haliotrema guttati by García-Vargas et al. (2008) . The original figures are highly diagrammatic (apparently drawn free hand) and are insufficient for diagnosis of the species, and unfortunately, the two specimens collected during the present study were also insufficient for redescription of the species. However, examination of the paratype (HWML 48570) and the two voucher specimens (HWML 48571) confirm the conspecificity of present specimens with those collected by García-Vargas et al. (2008) , and that the species is clearly a member of Haliotrematoides . Although this species requires redescription, it is transferred to Haliotrematoides as H. guttati ( García-Vargas, Fajer-Ávila & Lamothe-Argumedo, 2008 ) n. comb. based on the morphology of the haptoral armament and copulatory complex and position of the hooks. Haliotrematoides guttati closely resembles H. heteracantha in the comparative morphology of the anchors, bars and copulatory complex. Although specimens of H. heteracantha were not available for study, the two species are presently considered distinct based on absence of a loop in the shaft of the MCO in H. heteracantha (present in H. guttati ). However, the figures of H. heteracantha provided by Zhukov (1976) suggests that the MCO of the specimen drawn may be distorted or folded due to coverslip pressure, which may have obscured the loop of the shaft. Determination of possible synonymy, therefore, will depend on examination of the type specimens of H. heteracantha (not available for this study) or on recollection of the species from L. synagris in the Gulf of Mexico for comparison with H. guttati . The occurrence of H. guttati in Panama is a new geographic record for the helminth.