Neotropical Monogenoidea. 24. Rhinoxenus bulbovaginatus n. sp. (Dactylogyridae, Ancyrocephalinae) from the nasal cavity of Salminus maxillosus (Osteichthyes, Characidae) from the Rio Paraná, Paraná, Brazil

Abstract

Rhinoxenus bulbovaginatus n. sp. is described from the nose of Salminus maxillosus (Characidae) collected in the basin of the rio Paraná, near the city of Porto Rico, state of Paraná, Brazil. The new species can be differentiated from the other three species in the genus by the morphology of the copulatory complex, vagina, and ventral anchor. The sister group relationship of the known species of Rhinoxenus was determined using techniques of Phylogenetic Systematics (Cladism). The resulting cladogram (C.I.=100%) indicates that the new species is most closely related to R. piranhus Kritsky, Boeger and Thatcher, 1988. The other two species of the genus, R. arietinus Kritsky, Boeger and Thatcher, 1988 and R. nyttus Kritsky, Boeger and Thatcher, 1988, both parasites of Anostomidae fishes, have a paraphyletic position in the cladogram, suggesting that the origin of at least one of them can not be associated to cospeciation

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

“…2; Domingues & Boeger (2005), Figs 1C, 3A); (1) MCO with fewer than three rings ( fig. 3b; Kritsky et al (1986), Figs 3, 12;Kritsky et al (1988), Figs 3, 11-12;Boeger et al (1995), Fig. 2; Domingues & Boeger (2005), Figs 1D, 1F, 2B, 3G, 4C;Ferreira et al (2017), Figs 1b, 2a, 3a, 4a).…”

“…3d; Kritsky et al (1986) , Figs 9, 18; Domingues & Boeger (2002) , Fig. 8); (2) spike-like (Kritsky et al (1988), Figs 5, 16, 22;Boeger et al (1995), Fig. 8; Domingues & Boeger (2005), Figs 2G, 3H, M, 4H).…”

“…This character seems to be polymorphic for the Urocleidoides. Kritsky et al (1986) Kritsky et al (1988), Figs 1-2, 9, 18;Boeger et al (1995), Fig. 3; Domingues & Boeger (2005), Figs 1B, 2E, 3B, H, 4B); (1) soft to slightly sclerotized ( fig.…”

“…(0) Acute (figs 1j, 2g, 3c; Kritsky et al (1986), Figs 8, 17;Kritsky et al (1988), Fig. 24; Boeger et al (1995), Fig. 5; Domingues & Boeger (2002) Fig.…”

A new species of Kritskyia (Monogenea, Dactylogyridae) parasitic in the urinary bladder of Salminus brasiliensis (Characiformes) from the Pantanal wetlands, Brazil

“…To date, the only monogenean species recorded parasitizing S. brasiliensis is Rhinoxenus bulbovaginatus Boeger, Domingues et Pavanelli, 1995, found in the nasal cavities of host specimens collected from the Paraná River, Brazil (Boeger et al 1995).…”