Pesquisas helminthologicas realisadas no Estado do Pará: V. Genero Diaphanocephalus Diesing, 1851 (Nematoda: Strongyloidea)

Diaphanocephalus galeatus (Nematoda: Diaphanocephalidae), parasite of Salvator merianae (Squamata: Teiidae) in southern Brazil

“…The morphology and morphometry of males of D. galeatus found in this study agree with those described by Freitas and Lent (1938) in T. teguixin; however, females studied herein had slightly larger measurements (length and width of the esophagus, distance from the excretory pore to cephalic end, distance from vulvar lip until the rear end, and vaginal length) compared to those presented by the authors (length and width of the esophagus[0.368-0.400 and 0.216-0.240], distance from the excretory pore to cephalic end [0.368-0.416], distance from vulvar lip until the rear end and [0.520-0.872] and vaginal length [0.192-0.304]). According to Spinelli et al (1992), who studied D. galeatus from Tupinambis teguixin, this nematode parasite feeds on host tissue, resulting in lesions caused by the destruction of the intestinal mucosa through the mechanical action of their oral capsule, without causing ulcers in the affected area, only loss of tissue (i.e., an entry route for infection).…”

“…The nematodes were removed, quantified, fixed in AFA, and stored in alcohol 70 • GL. They were then mounted on semi-permanent slides with Aman's lactophenol, and viewed on an Olympus CX21 microscope for morphological and morphometric identification according to Freitas and Lent (1938) and Anderson, Chabaud, and Willmott (2009).…”

“…Three hundred forty-six specimens were collected (195 females and 151 males) with a prevalence of 80%, mean abundance 17.3, and mean intensity of infection 21.6 per host. The presented photographic records are unpublished, so they are of important scientific value, considering that Freitas and Lent (1938) presented only illustrations in the description of the parasite.…”

“…In S. merianae this nematode species was reported in the states of Mato Grosso (Cuiabá, Chapada dos Guimarães, Poconé), Mato Grosso do Sul (Aquidauana, Serra da Bodoquena, Corumbá and its Nhecolândia district), and Pernambuco (specifically, Fernando de Noronha archipelago where the species was introduced) (Ávila & Silva, 2011). In T. teguixin, D. galeatus have been collected in the states of Rio de Janeiro, São Paulo, Mato Grosso do Sul, and Rio Grande do Sul, as well as in Argentina and Bolivia (Freitas & Lent, 1938;Vicente, Rodrigues, Gomes, & Pinto, 1993). An additional host species Tupinambis rufescens (Günther, 1871) was recorded in Argentina (Spinelli, Fiorito, & Stiebel, 1992).…”

Diaphanocephalus galeatus (Nematoda: Diaphanocephalidae), a poorly known parasite of lizards: redescription, first genetic characterization and a revision of its congeners from Brazil

“…Diaphanocephalus galeatus (Rudolphi, 1819) has broad occurrence in South America, parasitizing teiid lizards (Teiidae), more often in Salvator merianae (Duméril & Bibron, 1839) and Tupinambis teguixin (Linnaeus, 1758) (Freitas and Lent, 1938; Ávila and Silva, 2010; Vieira et al ., 2016; Teixeira et al ., 2017). However, the morphological descriptions of the species are incomplete and there is no genetic characterization.…”