Hamatopeduncularia bagre Hargis, 1955

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

Hamatopeduncularia bagre Hargis, 1955

Type host.

Bagre marinus

Present study.

B. marinus

Locality/prevalence, mean abundance and intensity range on B. marinus .

San Francisco: 2 fish (mean TL 42.3 cm; range 38-45.3) infected of 4 examined (50 %); abundance, 1; intensity of infection, 2 worms. Seyba Playa: 2 fish (TL 28.3; 27-41.5) infected of 4 examined (50 %); abundance, 0.5; intensity of infection, 1. Champoton: 36 fish (TL 28.3; 30-45.2) infected of 43 examined (83. 7%); abundance, 3; intensity of infection, 2-6.

Supplementary observations

(measurements based on eleven specimens on B. marinus ). Body 1,463 (1,200-1,850; 10) long; greatest width 217 (175-262; 11). Pharynx 87 (70-112; 5) wide. MCO a coiled tube with 1 counterclockwise ring 70 (58- 97; 10) long, ring 24 (21-30; n=5) diameter. Haptor 324 (262-395; 5) wide. Ventral anchor 61 (68-101; 10) long; base 20 (18-22; 3) wide. Dorsal anchor 247 (225-262; 15) long. Ventral bar 88 (68-101; 7) long. Dorsal bar 146 (125-180; 13) long. Germarium 162 (145-190; 3) long, 66 (62-70; 3) wide. Testis 390 long, 100 wide.

Comments.

Hamatopeduncularia bagre was originally described on B. marinus from Alligator Harbor, Franklin County, Florida, USA ( Hargis 1955a). Recently, this species was redescribed based on specimens found on another catfish, Bagre bagre (Linnaeus, 1766) from several localities in Brazil ( Domingues et al. 2016). This monogenean species is characterized mainly by the possession of hooks on haptoral digits, double dorsal bar, and dissimilarity in the size of anchors. Measurements and the morphology of the sclerotized structures of the present specimens do not differ significantly from that figured in the redescription of H. bagre .

Molecular data.

A 768-770 bp fragment of the 28S rRNA gene (D1-D3) of H. bagre on B. marinus was obtained in the present study, which represents the first molecular data for this monogenean. There are three sequences of individual specimens of H. bagre included into the analyses that revealed that this species forms a sister lineage to that containing N. felis (see Figure 1).

Specimens deposited.

Eleven reference specimens from B. marinus in the CNHE (10615).

Three slides, each containing a haptor of a specimen of H. bagre used to amplify its DNA are deposited in the CNHE (10627).

Representative DNA sequence.

GenBank accession numbers MG586871, MG586872, MG586873.