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Helminths Parasitizing Procellosaurinus Erythrocercus, a Little-Known Neotropical Lizard Endemic to Brazilian Semiarid Caatinga Biome

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Helminths Parasitizing Procellosaurinus Erythrocercus, a Little-Known Neotropical Lizard Endemic to Brazilian Semiarid Caatinga Biome LETTERS DOI: 10.7589/2019-08-214 Journal of Wildlife Diseases, 56(4), 2020, pp. 000–000 Ó Wildlife Disease Association 2020 Helminths Parasitizing Procellosaurinus erythrocercus, a Little-known Neotropical Lizard Endemic to Brazilian Semiarid Caatinga Biome Antonio Carlos Santos Ferreira,1 Fabiano Matos Vieira,2,4,5 Leonardo Barros Ribeiro,1,3 Lu´ıs Cla´udio Muniz Pereira,2,4 Diego Ce´sar Nunes da Silva1 1Universidade Federal do Vale do Sa˜o Francisco, Campus Cienciasˆ Agra´rias, Colegiado de Cienciasˆ Biologicas,´ BR 407 km 12, Lote 543, Distrito de Irrigac¸a˜o Senador Nilo Coelho, CEP 56300-990, Petrolina, Pernambuco, Brazil; 2Laboratorio´ de Helmintos Parasitos de Vertebrados, Instituto Oswaldo Cruz, Av. Brasil 4365, Rio de Janeiro CEP 21040-900, Brazil; 3Programa de Pos-graduac´ ¸a˜o em Ecologia, Departamento de Biologia, Universidade Federal Rural de Pernambuco, Rua Dom Manoel de Medeiros, s/n, 52171-900, Recife, Pernambuco, Brazil; 4Programa de Pos-graduac´ ¸a˜o em Biodiversidade e Saude,´ Instituto Oswaldo Cruz, FIOCRUZ, Av. Brasil 4365, Rio de Janeiro CEP 21040-900, Brazil; 5Corresponding author (email: [email protected]) ABSTRACT: We report the identification of hel- imentac¸a˜o Animal 2015), immediately nec- minths in Procellosaurinus erythrocercus, a lizard ropsied, and identified as described by endemic to Brazilian Caatinga biome. Parasites that we found, such as Parapharyngodon sp. and Rodrigues (1991). Voucher specimens were Oochoristica sp., have not been reported in this deposited in the herpetology collection of the host, which is under threat in its area of Museu de Fauna da Caatinga (MFCH 684– occurrence. 689 and MFCH 4886-4891) at the Centro de Conservac¸a˜o e Manejo de Fauna da Caatinga Procellosaurinus erythrocercus is a fossorial of UNIVASF. lizard of diurnal behavior and psammophilous Live helminths were collected, fixed in 4% habits, which is endemic to the Caatinga hot formalin for 15 d and then stored in 70% biome in Brazil (Rodrigues 2003). This lizard, ethanol. To identify the nematodes, they were which is typical of the paleoquaternary sand cleared in Amann’s lactophenol and mounted dunes of the Middle Sa˜o Francisco River, on temporary slides. The cestodes were occurs in the states of Bahia (Rodrigues 1991), stainedwithDelafield’s hematoxylin and Piauı´ (Freitas and Verıssimo´ 2012), and mounted on permanent slides with Canada Pernambuco (Souza et al. 2013). balsam. Nematodes were identified as de- Very few studies about helminths parasitiz- scribed by Anderson et al. (2009) and cestodes ing Gymnophthalmidae lizards in the Caatin- according to Khalil et al. (1994). Voucher ga biome have been published (Ribeiro et al. specimens were deposited in the Helmintho- 2018), and records of helminths in P. eryth- logical Collection of the Oswaldo Cruz rocercus are nonexistent. We report the Institute (CHIOC) in Rio de Janeiro, Brazil. occurrence of helminths in P. erythrocercus The prevalence, mean intensity, and mean in Brazil. abundance of helminth were calculated as Lizards were collected from September to described by Bush et al. (1997). November 2011 and from July to December 2016, using pitfall traps, in a fragment of Necropsies were performed on eight adult Caatinga vegetation located on the Campus of male specimens of P. erythrocercus (snout- Agricultural Sciences (981904000 S, vent length [SVL]¼28.7761.51 mm) and four 4083205600 W) of the Universidade Federal do adult females (SVL¼31.3861.18 mm), 50% of Vale do Sa˜o Francisco (UNIVASF) in the which contained helminths. The helminth municipality of Petrolina, State of Pernambu- community was composed of Parapharyngo- co, Brazil. The physiognomy of this area is don sp. (Nematoda, Pharyngodonidae) and shrubby, with herbaceous stratum, sandy soil, Oochoristica sp. (Cestoda, Anoplocephalidae). flat relief, and vegetation consisting mainly of Despite the low richness of helminth species, cactus and bromeliads. The lizards were this host sample had a high prevalence, mainly euthanized with a lethal injection of lidocaine due to the infrapopulation of Oochoristica (Conselho Nacional de Controle de Exper- (50%; Table 1). 1 2 JOURNAL OF WILDLIFE DISEASES, VOL. 56, NO. 4, OCTOBER 2020 TABLE 1. Helminth species associated with Procellosaurinus erythrocercus (n¼12), in the municipality of Petrolina, state of Pernambuco, Brazil, and their respective ecological data. Infected Prevalence Mean Mean Helminth species hosts (%) intensity abundance Range Site of infection Nematoda Parapharyngodon sp.a 3 25 1 0.2560.43 1 Intestinal cecum Cestoda Oochoristica sp. 6 50 1.6761.11 0.8361.14 1–4 Small intestine a Each host infected with this nematode was parasitized by one specimen. All the Parapharyngodon sp. specimens taining the infective larvae (L3) of these collected (CHIOC 38780) were adult females nematodes remain in the soil until they are found in the intestinal cecum. Because the ingested by the host (Anderson 2000). main morphological features that characterize Species of Oochoristica, like all cestode species of this genus are found in males species, have a heteroxenous life cycle (i.e., (Bursey and Goldberg 1999), we were unable the intermediate or paratenic host contains to identify the specimens to the species level. the infective stage of the cestode), which is The Oochoristica sp. specimens (CHIOC obligatorily transferred to the definitive host 40098) were collected from the small intestine through predation or accidental ingestion of of hosts. These specimens present a set of the host harboring the infective stage (Mack- morphological features not previously found iewicz 1988). From what little is known about in other species of the genus. Therefore, we the life cycle of some species of Oochoristica, believe that this could be a new species, and beetles mainly of the family Tenebrionidae act future taxonomic studies will be conducted to as intermediate hosts, but other groups of confirm this hypothesis. insects might also act as intermediate hosts Prior to this study, two species of Para- (Conn 1985). Procellosaurinus erythrocercus, pharyngodon had been reported parasitizing a species that has no particular preference for Gymnophthalmidae lizards in the Caatinga food items, feeds mainly on insects and biome: Parapharyngodon largitor and Para- spiders (Rocha and Rodrigues 2005). There- pharyngodon alvarengai; as well as an un- fore, occurrence of Oochoristica sp. in this identified species of the genus Oochoristica host might be attributed to the ingestion of (host list in Brito et al. 2014; Ribeiro et al. some prey item of its diet. According to Brito 2018; Silva Neta and Avila´ 2018). et al. (2014), diet, predation behavior, and the The low richness of helminth species found use of microhabitats are determining factors in P. erythrocercus might be attributed to for the composition of the parasite communi- their small body size, because these hosts have ties in lizards of the Caatinga biome. a maximum SVL of 31 mm (Rodrigues 1991). It should be noted that the lizard P. According to Ribeiro et al. (2018) and Silva erythrocercus is currently classified as an Neta and Avila´ (2018), the body size of endangered species in the state of Pernambu- gymnophthalmid lizards is directly associated co, Brazil, and as a vulnerable species in the with the richness of helminths, where low state of Bahia, Brazil. The main threat is the SVL promote smaller parasitic abundance and extraction of sand from the dunes that are the diversity than large lizard hosts. habitat of this lizard. Moreover, the sandy The fossorial and semifossorial habit of soils adjacent to the Sa˜o Francisco River are Gymnophthalmidae lizards might facilitate widely used in livestock- and fruit-growing infection by monoxenous parasites (Ribeiro activities in these states, and its modification et al. 2018). This could explain the parasitism reduces the size of the lizard’s habitat and by Parapharyngodon sp., because eggs con- limits its food resources (Secreta´ria de Meio LETTERS 3 Ambiente e Sustentabilidade de Pernambuco Conselho Nacional de Controle de Experimentac¸a˜o 2017). Animal. 2015. Normativas do CONCEA para produ- Information about the biology and ecology c¸a˜o, manutenc¸a˜o ou utilizac¸a˜o de animais em atividades de ensino ou pesquisa cientıfica:´ Lei, of this lizard species is still scanty and limited decreto, portarias, resoluc¸˜oes, normativas e ori- to the studies by Rodrigues (1991, 2003) and entac¸˜oes te´cnicas, 3rd Ed. Conselho Nacional de Freitas and Verıssimo´ (2012). Studies about Controle de Experimentac¸a˜o Animal, Ministe´rio da several aspects of its lifestyle, including Ciencia,ˆ Tecnologia, Inovac¸oes˜ e Comunicac¸oes˜ parasitism and the implications of the host- (MCTIC), Brasılia,´ Brazil, 386 pp. parasite relationship, are important in order to Freitas MA, Verıssimo´ D. 2012. First record of the lizard Procellosaurinus erythrocercus (Rodrigues, 1991), underpin conservation proposals for this lizard (Squamata: Gymnophtalmidae) for the Brazilian state endemic to the Caatinga biome. of Piauı,´ Brazil. Herpetol Notes 5:35–36. This study was financed in part by the Khalil LF, Jones A, Bray RA, editors. 1994. Key to the Coordenac¸a˜o de Aperfeic¸oamento de Pessoal cestodes of vertebrates. CABI Publishing, Walling- de Nıvel´ Superior–Brasil (CAPES)–Finance ford, UK, 751 pp. Code 001. We acknowledge the Instituto Mackiewicz JS. 1988. Cestode transmission patterns. J Parasitol 74:60–71. Chico Mendes de Conservac¸a˜o da Biodiversi- Ribeiro LB, Ferreira ACS, Silva DCN, Vieira FM, Moura dade for specimen collection permits (SisBio GJB. 2018. Helminth parasites of the lizard Notho- 2477684 e 29558-1) and the Comissa˜ode bachia ablephara (Gymnophthalmidae) in Caatinga E´ tica de Uso de Animais for research approval areas from the Serta˜o of Brazil. J Parasitol 104:177– (0008/140217). A.C.S.F was supported by a 182. master’s fellowship from CAPES, Brazil, and Rocha PLB, Rodrigues MT. 2005. Electivities and resource use by an assemblage of lizards endemic F.M.V. was supported by a postdoctoral to the dunes of the Sa˜o Francisco River, northeastern fellowship from Programa Nacional de Pos- Brazil.
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