Euryhaliotrema Kritsky & Boeger, 2002

Mendoza-Franco, Edgar F., Tun, Mariela del Carmen Rosado, Anchevida, Allan de Jesus Duarte & Rodriguez, Rodolfo E. del Rio, 2018, 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, ZooKeys 783, pp. 125-161 : 125

Euryhaliotrema Kritsky & Boeger, 2002

Euryhaliotrema Kritsky & Boeger, 2002: 12, fig. 1; Kritsky 2012: 230 (revised and amended).

Euryhaliotrema amydrum Kritsky & Bakenhaster, 2011: 64, figs 17-24.

Type host.

Archosargus probatocephalus (Walbaum, 1792)

Present study.

A. rhomboidalis (new host)

Locality/prevalence, mean abundance and intensity range.

San Francisco: 18 fish (mean TL 26.9 cm; range 17-23.6) infected of 18 examined (100 %); abundance, 37; intensity of infection, 22-51 worms. Seyba Playa: 25 fish (TL 28.4; 19.2-30.5) infected of 25 examined (100 %); abundance, 37; intensity of infection, 29-47. Champoton: 45 fish (TL 28.2; 24.7-30.5) infected of 45 examined (100 %); abundance, 23; intensity of infection, 8-35.

Supplementary observations

(measurements based on six specimens). Body 336 (305-350; 6) long; greatest width 80 (70-90; 4). Pharynx 23 wide. MCO a counterclockwise coil of 1-2 rings, proximal ring 11 (10-12; 5) diameter. Haptor 77 (67-84; 4) wide. Ventral anchor 31 (28-36; 10) long; dorsal anchor 43 (40-45; 9) long. Ventral bar 35 (30-41; 7) long; dorsal bar 33 (32-34; 4) long.

Comments.

This species was originally described on the sheepshead A. probatocephalus from the Indian River Lagoon in Florida ( Kritsky and Bakenhaster 2011). This species is mainly characterized in having a tightly coiled MCO and dorsal anchor roots approaching the length of the dorsal anchor shaft. Differences in the length of the dorsal anchors between present specimens and those of E. amydrum originally described were found (i.e. length 40-45 vs. 49 53), but the worms are clearly conspecific. Montoya-Mendoza et al. (2015) reported E. amydrum on A. probatocephalus from Alvarado Lagoon and El Conchal estuary in Veracruz (Gulf of Mexico). However, these latter authors did not provided any accession number for their parasite specimens apparently deposited in the CNHE. Then, we could not corroborate Montoya´s finding.

Specimens deposited.

Six reference specimens in the CNHE (10607).