Neotropical Monogenoidea. 40. Protorhinoxenus prochilodi gen. n., sp. n. (Monogenoidea: Ancyrocephalinae), parasite of Prochilodus lineatus (Characiformes: Prochilodontidae) from South Brazil

Abstract

Abstract. The monotypic Protorhinoxenus gen. n. is proposed to accommodate a species with the following characteristics: 1) tubular sclerotised vagina, 2) vaginal pore dextrolateral, 3) ventral and dorsal anchors with undifferentiated elongate shaft and base (representing approximately 2

Monogenoidean parasites of Acestrorhynchus falcatus (Characiformes: Acestrorhynchidae) from Pará, Brazil: species of Diaphorocleidus and Rhinoxenoides n. gen. (Monogenoidea: Dactylogyridae)

“…Rhinoxenoides n. gen. is characterized by the following: (1) MCO a coiled tube with clockwise rings articulated to the accessory piece by copulatory ligament; (2) dorsal anchor with superficial root twice as long as the deep root; straight shaft, curved point; and (3) dorsal bar absent. Rhinoxenoides n. gen. is similar to Rhinoxenus Kritsky, Boeger &Thatcher, 1988 andProtorhinoxenus Domingues &Boeger, 2002, mainly by sharing the general morphology of the copulatory complex and the shape of dorsal anchors. However, Rhinoxenoides n. gen. is different from members of both genera by the following: (1) anchors with conspicuous roots, without sclerotized cap in the base (inconspicuous roots and base with sclerotized cap in Protorhinoxenus and Rhinoxenus); (2) MCO with clockwise rings (counterclockwise rings in Protorhinoxenus and Rhinoxenus); and (3) base of the J.F.…”

“…The absence of circular, tandem, sclerotized brims is autapomorphic for Rhinoxenoides n. gen. (1) dextral (Kritsky et al (1986), Fig. 10; Domingues & Boeger (2002) , Fig. 1).…”

“…Type specimens and vouchers were deposited in the following collections: Helminthological Collection of the Instituto Oswaldo Cruz (CHIOC), Rio de Janeiro, RJ, Brazil; Invertebrate Collection of the Instituto de Pesquisas da Amazônia (INPA), Manaus, AM, Brazil; Invertebrate Collection of the Museu Paraense Emílio Goeldi (MPEG), Belém, PA, Brazil. Sixteen characters were used for the phylogenetic analysis of ten terminals, which included Protorhinoxenus prochilodi Domingues & Boeger, 2002, Rhinoxenoides horacioschneideri n. gen. n. sp., and species of Rhinoxenus Kritsky, Thatcher & Boeger, 1988.…”

“…(0) MCO with more than three rings (figs 1b, 2b; Kritsky et al (1988), Fig. 21; Domingues & Boeger (2002), Fig. 2; Domingues & Boeger (2005), Figs 1C, 3A); (1) MCO with fewer than three rings ( fig.…”

Apedunculata discoidea gen. n., sp. n. (Monogenea: Dactylogyridae) parasitic on Prochilodus lineatus (Valenciennes, 1837) (Characiformes: Prochilodontidae) from southeastern Brazil

“…Eiras et al (1995) recorded unidentified dactylogyrids from the gills and skin of P. lineatus from ponds in São Paulo. Most recently, three species of monogeneans parasitizing P. lineatus Valenciennes from Paraná and Paranapanema Rivers were described, respectively: Kritskyia boegeri Takemoto, Lizama and Pavanelli, 2002, Protorhinoxenus prochilodi Domingues and Boeger, 2002, Tereancistrum curimba Lizama, Takemoto and Pavanelli, 2004, T. ornatus Lizama, Takemoto and Pavanelli, 2004 and Rhinoxenus curimbatae Domingues andBoeger, 2005 (Domingues andBoeger, 2002;2005;Takemoto et al, 2002;Lizama et al, 2004).…”