A new species ofProcyrnea(Nematoda: Habronematidae) parasitic inRhea pennata(Aves: Rheidae) from Patagonia, Argentina, with a key to species of the genus

Abstract

Procyrnea choique n. sp. is described from the lesser rhea, Rhea pennata d´Orbigny (Aves: Rheidae), from the Protected Natural Area Península Valdés, Chubut province, Argentina. The new species resembles P. ficheuri, P. murrayi, P. excisiformis, P. dollfusi, P. haliasturi, P. anterovulvata, P. graculae, P. brevicaudata, P. uncinipenis, P. javaensis, P. ameerae, P. ornata, P. aegotheles, P. spiralis, P. ruschii and P. aptera, mainly in the absence of lateral alae; but differs from its congeners by having a left spicule without barbs, the position of the vulva which is post-equatorial, the absence of lateral ridges, absent median precloacal papilla, asymmetrical caudal alae, males more than 6 mm long, left spicule 1 mm long and spicule ratio 1:3. Our results extend the taxonomy of Procyrnea Chabaud, 1958 and comprise the first report of a habronematid from R. pennata. A key to species of Procyrnea is presented.

First record of Procyrnea sp. (Nematoda: Habronematidae) in Buteogallus schistaceus (Sundevall) (Accipitriformes: Accipitridae) in Brazilian Amazon

“…Finally, Chabaud's work establishes the Procyrnea as genus (Zhang et al, 2004). Procyrnea nematodes are bird parasites, mainly in birds of prey of the Falconiformes and Strigiformes orders around the world (Eduardo & Villa, 2011;Bagnato et al, 2018). They use as an intermediate host an orthopteran insect in whose hemocele they develop from larvae to infective stage L3, remaining encapsulated or free inside (Anderson, 2000).…”

“…Procyrnea anterovulvata Pinto, Vicente & Noronha, 1996 Chelidoptera tenebrosa brasiliensis Sclater Brazil Pinto et al (1996) Procyrnea brevicaudata Zhang, Brooks & Causey, 2004 Crypturellus cinnamomeus (Lesson) Costa Rica Zhang et al (2004) Procyrnea choique Bagnato, Frixione, Digiani & Cremonte, 2018 Rhea pennata (d'Orbigny) Argentina Bagnato et al (2018) Procyrnea colaptes (Walton, 1927) Celeus lugubris lugubris (Malherbe) a Celeus elegans jumanus (Spix) b…”

“…Nematode specimens were clarified with 50% Aman lactophenol and temporarily mounted between slide and coverslip for observation and measurement of morphological characters under light microscope LEICA DM2500 with an imaging capture system. For the taxonomic classification of nematodes, the works of Vicente et al (1995) and Bagnato et al (2018) were consulted. Thirty days after admission the animal was returned to the wild.…”

Natural infection by Procyrnea uncinipenis (Nematoda, Habronematidae), a parasite from rheas, an autoctone bird from South America, in emus Dromaius novaehollandiae, a ratite from New Zealand

“…These nematodes have been reported in rheas from Brazil 4 , 8 – 11 and Argentina 12 . Another species, Procyrnea choique 13 , was described from another species of rhea, R. pennatta , from Argentina.…”