Fabiano Paschoal

Dactylogyrids (Monogenea) parasitic on cichlids from northern Brazil, with description of two new species of Sciadicleithrum and new host and geographical records.

Two new species of Sciadicleithrum Kritsky, Thatcher and Boeger, 1989 are described from two cichlids from the Araguarí River, State of Amapá, northern Brazil. Sciadicleithrum edgari n. sp. from Satanoperca jurupari (Heckel, 1840) differs from all congeneric species in the morphology (hook-shaped, with middle process and distally bifurcate) of the accessory piece of the male copulatory organ (MCO). Sciadiclethrum araguariensis n. sp. from Crenicichla labrina (Spix and Agassiz, 1831) can be distinguished from all other species by a Y-shaped accessory piece of MCO. In addition to the description of two new species, new host and geographical records of six dactylogyrid monogeneans from cichlid fishes are presented.

Checklist of metazoan associated with grunts (Perciformes, Haemulidae) from the Nearctic and Neotropical regions

Using information from published articles, databases, and recent samples from the Brazilian coastal zone, a list of parasites of haemulid (grunts) fish known from the Neotropical and Nearctic regions was structured. A total of 231 species of parasites were listed totaling 775 records involving 48 hosts, distributed in 86 localities of the American Continent. Records were listed with information on hosts, habitat, distribution and new findings; a host-parasite list is also included herein.

A new species of Acantholochus (Cyclopoida, Bomolochidae) parasitic on the barred grunt Conodon nobilis (Linnaeus, 1758) (Osteichthyes, Haemulidae) from Rio de Janeiro, Brazil

A new species of Acantholochus Cressey, 1984 (Cyclopoida, Bomolochidae), parasitic on the gills and opercular cavity of the barred grunt Conodon nobilis (Linnaeus, 1758), from the coastal zone of the State of Rio de Janeiro, Brazil, is described and illustrated. The new species differs from its congeners through a combination of characters that includes presence of lamellae on the spines on the third segment of the exopods of the third leg, the number of antennule segments, and the presence of one seta on the second endopodal segment of the third leg.

A new species of Ergasilus (Copepoda: Ergasilidae) from Geophagus altifrons and G. argyrostictus (Perciformes: Cichlidae) in the Brazilian Amazon.

A new species of ergasilid copepod, Ergasilus xinguensis n. sp., is described from females found on the gills of two cichlid fishes, Geophagus argyrostictus (Kullander, 1991) (type host) and G. altifrons (Heckel, 1840), from the Brazilian Amazon. The new species can be distinguished from congeners by the unique combination of the following characteristics: the cephalothorax is not inflated and is slightly constricted, the first antennulary segment bears 3 setae, maxillule with 3 unequal outer setae without minute process medially, maxilla has a large syncoxa with one seta near its basis, first and fourth legs are with a 3-segmented endopod, base of the exopod in leg 2 with a conspicuous bluntly-pointed projection and caudal ramus with two rows of curved conical spinules on ventral surface. The new species is the second member of Ergasilus von Nordmann, 1832 found on cichlids of the genus Geophagus (Heckel).

Dichelyne (Cucullanellus) tornquisti n. sp. (Nematoda: Cucullanidae) from Corocoro Grunt, Orthopristis ruber (Cuvier, 1830) (Perciformes: Haemulidae) from Southeastern Brazil

Abstract:  Dichelyne (Cucullanellus) tornquisti n. sp. is described from the intestine of the marine fish Orthopristis ruber (Haemulidae) of Rio de Janeiro, Brazil. The new species differs from the congeners by the location of the deirids (same level) and the excretory pore (posterior) in relation to esophagus-intestinal junction and by papillae 5 to 9 not forming a subventral line. It is the first Dichelyne species described from fish family Haemulidae in the Brazilian coastal zone.

First record of Caligus mutabilis (Copepoda: Caligidae), in sea-farmed Mycteroperca microlepis (Perciformes: Serranidae) in Brazil.

Sea lice (copepods) are widespread pathogens in marine teleost cultivation around the world. The sea louse Caligus mutabilis Wilson, 1905, is recorded here for the first time in sea-farmed gag grouper, Mycteroperca microlepis, in Brazil.

A new species of Leposphilus Hesse, 1866 (Copepoda: Philichthyidae) parasitic in the interorbital canals of the whitemouth croaker Micropogonias furnieri (Desmarest) (Sciaenidae) off Brazil with an amended diagnosis of the genus

A new species of the monotypic genus Leposphilus Hesse, 1866 (Cyclopoida: Philichthyidae), Leposphilus vogti n. sp., is described based on adult female and male specimens from the interorbital canals of Micropogonias furnieri (Desmarest) (Sciaenidae) in Sepetiba Bay, State of Rio de Janeiro, Brazil. The new species differs from its only congener, L. labrei Hesse, 1866, by the following combination of characters in the adult female: a globular cephalosome, a two-segmented maxilla, and fourth abdominal somite fused to caudal ramus; and in the adult male: presence of maxilliped, leg 3 with five setae, and caudal rami tipped with six setae. In addition, an amendment of diagnosis of Leposphilus is provided based on the characters of the new species. Previous records of philichthyid copepods from actinopterygians in the Atlantic and Pacific Oceans off the American continent are also given.

A new species of philichthyid copepod (Crustacea: Cyclopoida) parasitic on Stellifer spp. (Perciformes: Sciaenidae) from southeastern Brazil

A new species of copepod, Colobomatus stelliferi n. sp., belonging to the cyclopoid family Philichthyidae Vogt, 1877 is proposed based on female specimens collected from the mandibular canals of three species of sciaenid teleosts: Stellifer brasiliensis (Schultz) (type-host), S. rastrifer (Jordan) and S. stellifer (Bloch), collected in Caraguatatuba Bay, State of São Paulo, Brazil. The new species can be distinguished from its closest congeners by the absence of lateral processes in the genital somite, the presence of one cephalic process in the cephalosome and one pair of dorso-lateral processes on the fused pedigerous somites. This is the first species of Colobomatus Hesse, 1873 described as parasites of species of the teleost genus Stellifer.

Occurrence of Clavellisa ilishae (Copepoda: Lernaeopodidae) parasitizing herrings (Actinopterygii: Clupeidae) in Brazil

The lernaeopodids are highly specialized copepods which are widely distributed worldwide. In this paper the first record of Clavellisa ilishae Pillai, 1962 in the Neotropical region is documented parasitizing Sardinella brasiliensis from coastal zone of Rio de Janeiro, Brasil.

Occurrence of Metacaligus rufus (Wilson, 1908) (Copepoda, Caligidae) parasitizing the cownose ray Rhinoptera bonasus (Mitchill, 1815) (Elasmobranchii, Myliobatidae) in Brazil

aNúcleo de Pesquisa e Desenvolvimento do Litoral Norte, Instituto de Pesca, Av. Cais do Porto, 2275, CEP 11680-000, Ubatuba, SP, Brazil bCurso de Pós-graduação em Biologia Animal, Universidade Federal Rural do Rio de Janeiro – UFRRJ, Rodovia BR 465, Km 07, s/n, Zona Rural, CEP 23890-000, Seropédica, RJ, Brazil cDepartamento de Parasitologia Animal, Universidade Federal Rural do Rio de Janeiro – UFRRJ, Rodovia BR 465, Km 07, s/n, Zona Rural, CEP 23890-000, Seropédica, RJ, Brazil