Haliotrema magnigastrohamus Zhukov, 1976

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

Haliotrema magnigastrohamus Zhukov, 1976 Figure 3

Haliotrema magnigastrohamus Zhukov, 1976: 38, fig. 5; Kritsky et al. 2009b: 40, figs 166-119 (transferred to Haliotrematoides ).

Type host.

Lutjanus synagris

Present study.

L. synagris

Locality/prevalence, mean abundance and intensity range.

San Francisco: 65 fish (mean TL 28.2 cm; range 20-35.7) infected of 70 examined 92.8 %); abundance, 9; intensity of infection, 3-13 worms. Seyba Playa: 78 fish (TL 28.4; 19.2-30.5) infected of 79 examined (98.7 %); abundance, 17; intensity of infection, 8-28. Champoton: 69 fish (TL 28.2; 24.7-30.5) infected of 75 examined (92 %); abundance, 9; intensity of infection, 5-15.

Supplementary observations

(measurements based on ten specimens). Body 352 (295-382; 7) long; greatest width 66 (50-85; 7). Haptor 64 (52-78; 8) wide. Pharynx 15 (13-19; 3) wide. MCO 28 (25-35; 8) long. Ventral anchor 37 (36-39; 18) long; dorsal anchor 29 (29-31; 17) long. Ventral bar 42 (40-45; 9) long; dorsal bar 17-18 long. Hook 13 (12-13) long.

Comments.

This species was originally described by Zhukov (1976) as Haliotrema magnigastrohamus from four lutjanid species [ L. synagris , L. analis , L. mahogoni , and O. chrysurus from the Bay of Campeche (Area Havana)] and later it was transferred to Haliotrematoides by Kritsky et al. (2009b) based on specimens of this species found in L. analis from Colón, Panama (apparently on the Caribbean Sea off Panama). Present specimens exhibited a C-shaped accessory sclerite (not depicted in Kritsky et al. 2009b) on base of each ventral anchor (see Zhukov 1976; see Figure 3A in the present study). In other features, MCO and dorsal bar (not depicted in Kritsky et al. 2009b) most resembles Hal. guttati ( García-Vargas, Fajer-Ávila & Lamothe-Argumedo, 2008) Kritsky, Yang & Sun, 2009 from L. guttatus from the Mexican Pacific (see figures 107 and 109 in Kritsky et al. 2009b and Figure 3A, B in the present study).

Measurements of the present finding fits well with the morphometric of H. magnigastrohamus provided by Kritsky et al. (2009b). Montoya-Mendoza et al. (2016) reported H. magnigastrohamus on L. synagris from Santiaguillo Reef, Veracruz (Gulf of Mexico) and deposited a voucher specimen in the CNHE (accession number 10220). However, examination of that specimen revealed it to be an Euryhaliotrema sp. that resembles E. torquecirrus . Examination of another voucher specimen labeled as E. torquecirrus (CNHE 10223) on L. synagris deposited by the same authors revealed it to be same form as that of Euryhaliotrema sp. In this latter form, the coil of the MCO comprises 2½ rings (more than four rings in E. torquecirrus ) and a single accessory piece (accessory piece includes two components in E. torquecirrus ) (see Euryhaliotrema sp. in Figure 4 and E. torquecirrus in figure 24 in Kritsty 2012).

Specimens deposited.

Ten reference specimens in the CNHE (10600).