Chauhanellus neotropicalis Domingues & Fehlauer, 2006

Domingues, Marcus V., Soares, Geusivam B. & Watanabe, Alana, 2016, Monogenoidea (Polyonchoinea: Dactylogyridae) parasitizing the gills of marine catfish (Siluriformes: Ariidae) inhabiting the Atlantic Amazon Coast of Brazil, Zootaxa 4127 (2), pp. 301-326 : 314-315

Chauhanellus neotropicalis Domingues & Fehlauer, 2006

Chauhanellus neotropicalis: Domingues & Fehlauer (2006) : 63 –65, figs. 1–7 (descr); Cohen & Kohn (2008): 8, 32 (citat); Kohn et al. (2013): 39, 135, fig. 137 (citat).

Type-host: Aspistor luniscutis (Valenciennes) .

Site of infection: Secondary lamellae of the gills.

Type-locality: Fish market, Municipality of Paranaguá, State of Paraná, Brazil.

Other records: Aspistor quadriscutis, Fish market, Municipality of Bragança, State of Pará, Brazil; Amphiarius rugispinis, Bombom Village, Municipality of Viseu, State of Pará, Brazil (01º11’48”N, 46º08’24” W); A. rugispinis, Fishing village of Ajuruteua, Municipality of Bragança, State of Pará, Brazil (0°49’31”N, 46°36'29"W); A. rugispinis, Fish market, Municipality of Bragança, State of Pará, Brazil; Notarius grandicassis, Bombom Village, Municipality of Viseu, State of Pará, Brazil; N. grandicassis, Fishing village of Ajuruteua, Municipality of Bragança, State of Pará, Brazil; N. grandicassis, Fish market, Municipality of Bragança, State of Pará, Brazil; Sciades passany, Fish market, Municipality of Bragança, State of Pará, Brazil; Sciades proops, Fishing village of Ajuruteua, Municipality of Bragança, State of Pará, Brazil; S. proops, Fish market, Municipality of Bragança, State of Pará, Brazil.

Prevalence of infection: 43 of 66 (65%) of A. quadriscutis ; 23 of 28 (82%) of A. rugispinis ; 17 of 19 (92%) of N. grandicassis ; 100% of 84 S. proops ; 12 of 13 (92%) of S. passany .

Remarks: The analysis of specimens of Chauhanellus parasitizing the gills of of A. quadriscutis , A. rugispinis , N. grandicassis , S. proops and S. passany indicated that they are conspecific with C. neotropicalis , based on the morphology of the male copulatory organ and haptoral structures. These specimens have a male copulatory organ with 1¼ counterclockwise rings and distal acute tip, ventral bar possessing postero-dorsal footlike protuberances, and dorsal bar with V-shaped with spine-like ends. The specimens collected from those hosts did not differ morphometrically from the type-host collected from the Brazilian Southern Coast, extending the distribution of C. neotropicalis to the North coast of Brazil.