Globocephalus urosubulatus (Alessandrini, 1909) (Nematoda: Ancylostomatidae) in Brazil: a morphological revisitation

Abstract

Helminthiasis occurs frequently in wild or domestic pigs in the most varied environments or production systems; however, the literature includes few taxonomic studies for the purpose of expanding this knowledge about the parasitic diversity in these animals. Thus, in order to expand this knowledge regarding parasitic diversity in these animals, the present study reports the occurrence and redescribes Globocephalus urosubulatus infecting domestic pigs in the state of Pará, Brazil, using microscopy. Four hundred and ten specimens of Sus scrofa intestinal nematodes were collected extensively in the municipality of Moju, northeastern mesoregion of Pará and observed under light and scanning electron microscopy. Based on morphological characteristics, the nematodes were identified as G. urosubulatus, and new morphological data were added by light microscopy and scanning electron microscopy for the diagnosis of this parasite.

Epidemiology and Integrative Taxonomy of Helminths of Invasive Wild Boars, Brazil

“…The morphometric data of G. urosubulatus in this study were compared to those of Francis [ 22 ] (1978), Nanev et al [ 23 ] (2007), and Pinheiro et al [ 24 ] (2021) and presented in Table S4 . Photomicrographs of taxonomic interest are presented in Figure S4 .…”

“…This study provides detailed morphologic and morphometric data of the recovered helminth species; there are a few studies about this topic, such as the reports of Dakova and Panayotova-Pencheva [ 19 ] on A. strongylina and O. dentatum from wild boars in Bulgaria; Giang et al [ 21 ] on S. ransomi from pigs in Vietnam; Pinheiro et al [ 24 ] on G. urosubulatus from domestic pigs in Brazil; and Lisitsyna [ 27 ] and Amin et al [ 28 ] on M. hirudinaceus from wild boars in Ukraine. Nevertheless, the current analyses in this regard for most of them are few and outdated; this is especially true for S. dentatus , as anatomic studies on this species are scarce and dated [ 42 , 43 , 44 ]; for T. suis , as there is no clear differential criterion from Trichuris trichiura and new morphological criteria are needed to differentiate these two species [ 25 ]; and for M. hirudinaceus , as this species appears to exhibit considerable size variation of taxonomically important structures in relation to geographic region and host [ 28 ].…”