Cylindrotaenia americana Jewell, 1916

Aguiar, Aline, Morais, Drausio Honorio, Firmino Silva, Lidiane A., Anjos, Luciano Alves Dos, Foster, Ottilie Carolina & Silva, Reinaldo José Da, 2021, Biodiversity of anuran endoparasites from a transitional area between the Atlantic Forest and Cerrado biomes in Brazil: new records and remarks, Zootaxa 4948 (1), pp. 1-41 : 16-17

Cylindrotaenia americana Jewell, 1916

Hosts (prevalence; range): D. minutus (1/37; 1), L. podicipinus (5/225; 1), and P. mystacalis (1/59; 5).

Site of infection: small intestine.

Stage: adult.

Type host and type locality: Acris gryllus (LeConte) , Urbana , Illinois, United States of America .

Comments: the 27 species of Nematotaeniidae are parasites of amphibians and reptiles and they can belong

to five genera ( Bitegmen , Distoichometra , Nematotaenia , Lanfrediella , and Cylindrotaenia ) which were probably originated in Gondwana land ( Jones 1987; Melo et al. 2011). Cylindrotaenia americana (syn. Cylindrotaenia quadrijugosa ) was the second species described for Nematotaeniidae and it is the type species of the genus Cylindrotaenia ( Jones 1987) . According to Jones (1987), the 17 known species of Cylindrotaenia are arranged in five groups considering their similar traits and geographic distribution such as the Group I of C. americana which comprises American species [e.g. C. americana , Cylindrotaenia idahoensis (Waitz & Mehra) , and Cylindrotaenia chilensis (Puga & Franjola) ] (see Jones 1987). Our specimens presented the main features of C. americana such as a single group of reproductive organs (1 testis, 1 cirrus, 1 ovary, and 1 vitelline gland) in each proglottid, two parauterine capsules not surround by a second envelope resulting in a single complex parauterine which can be diagonal or transverse per segment. Moreover, pregravid and gravid proglottids are wider than long, and the testes and uterus are dorsally located, while the ovary can be spherical or oval ventrally located. In South America, there are several families of amphibians as hosts for C. americana (see Campi„o et al. 2014 and Oliveira et al. 2019), however D. minutus , L. podicipinus and P. mystacalis constitute new records for this cestode.