Morphological and molecular (28 S rRNA) data of monogeneans (Platyhelminthes) infecting the gill lamellae of marine fishes in the Campeche Bank, southwest Gulf of Mexico Author Mendoza-Franco, Edgar F. Author Tun, Mariela del Carmen Rosado Author Anchevida, Allan de Jesus Duarte Author Rodriguez, Rodolfo E. del Rio text ZooKeys 2018 783 125 161 http://dx.doi.org/10.3897/zookeys.783.26218 journal article http://dx.doi.org/10.3897/zookeys.783.26218 1313-2970-783-125 49C8F304763446CFA9FA0C640B387F75 49C8F304763446CFA9FA0C640B387F75 Euryhaliotrema fajeravilae Kritsky & Mendoza-Franco, 2012 Type host. Lutjanus argentiventris (Peters, 1869) Present study. L. griseus (new host) Locality/prevalence, mean abundance and intensity range. San Francisco: two fish (mean TL 28.1cm; range 21.6-39) infected of 65 examined (3 %); abundance, 0.1; intensity of infection, 1-2 worms. Champoton: 1 fish (TL 28.3; 25.2-37) infected of 37 examined (2.7 %), abundance, 0.05; intensity of infection, 2. Supplementary observations (measurements based on four specimens). Body 327 (200-380; 4) long; greatest width 76-80. Haptor 70 (65-75; 3) wide. MCO 19 (18-21; 4) long. Ventral anchor 39 (35-44; 8) long; dorsal anchor 55 (47-59; 8) long. Ventral bar 40 (33-54; 4) long; dorsal bar 37 (30-46; n = 4) long. Comments. This species was described from L. argentiventris from the Perlas Archipielago, Panama by Kritsky and Mendoza-Franco (in Kritsky 2012 ). Euryhaliotrema fajeravilae is distinguished from other species of the genus infecting lutjanids by having larger anchors and a noticeably smaller copulatory complex. The morphometrics of the present specimens did not differ from that of the original description. Specimens deposited. Four reference specimens in the CNHE (10614).