Stilestrongylus aculeata ( Travassos 1918 )

Guillermo Panisse, María Del Rosario Robles, María Celina Digiani, Juliana Notarnicola, Carlos Galliari & Graciela Teresa Navone, 2017, Description of the helminth communities of sympatric rodents (Muroidea: Cricetidae) from the Atlantic Forest in northeastern Argentina, Zootaxa 4337 (2), pp. 243-262 : 252

Stilestrongylus aculeata ( Travassos 1918)

Site of infection. small intestine

Collection number. MLP-He7330

Host species. Akodon montensis . CG177

Localities. CAMB, RVSU and PPU

Comments. The morphological characters observed in the specimens agree with the original description given by Simões et al. (2014), i.e. synlophe with 19–23 subequal ridges, asymmetrical caudal bursa with larger right lobe, bursal pattern of type 1-4 on the right lobe and 2-2-1 on the left lobe, left ray 2 especially developed, asymmetrical arising of rays 8 and spicules 370–460 long, among other morphometric characters.

This species was originally described as Heligmosomum aculeatum by Travassos (1918) from Angra dos Reis, Rio de Janeiro, Brazil. This author later provided the illustration of the caudal bursa, which was not included in the former description ( Travassos, 1921). The species was transferred to the genus Longistriata Schulz, 1926 ( Travassos & Darriba, 1929) and, finally, to Stilestrongylus by Durette-Desset (1971) although none of these nomenclatural changes were accompanied by a redescription. Simões et al. (2014) recently described the synlophe and provided some morphometrical data for the species. Our specimens were identified as S. aculeata sensu Simões et al. (2014) because the main diagnostic characters (mainly those of the caudal bursa) corresponded to those described by Simões et al. (2014), rather than to those described by Travassos (1918, 1921).

Stilestrongylus aculeata was reported from Akodon cursor in Suruí-Magé ( Gomes et al. 2003) and later from A. montensis and O. nigripes in Serra dos Órgãos ( Simões et al. 2011) , Rio de Janeiro, Brazil.

This is the first record of this species in Argentina, and so extends its geographical range.