Co-occurrence of Pectinospirura argentata Wehr, 1933, Skrjabinoclava andersoni n. sp. and larvae (Nematoda: Acuariidae) in the proventriculus of Larus dominicanus Lichtenstein (Aves: Laridae), with notes on their attachment

Abstract

Pectinospirura argentata Wehr, 1933, Skrjabinoclava andersoni n. sp. and acuariid larvae, collected from the proventriculus of the kelp gull Larus dominicanus from coastal Buenos Aires, Argentina, are described. This is the first record of the genus Pectinospirura Wehr, 1933 from South America and from the kelp gull. The measurements of both sexes are given because there are some differences with previously described specimens of P. argentata; the male is smaller with smaller spicules and the female is larger with smaller eggs. Skrjabinoclava andersoni n. sp. can be distinguished for all other species in the genus by the morphology of both spicules and by the cuticle which is not inflated anteriorly. This genus is reported for the first time in the kelp gull and from Argentina.

Helminths ofMilvago chimango temucoensis(Aves: Falconiformes) from Los Ríos Region, Chile: New Records for Neotropical Raptors

“…However the morphological characteristics and measurements were coincident with the female of Skrjabinoclava tupacincai Freitas, Vicente & Ibañez 1970 described by Wong & Anderson (1987) in Calidris alba Pallas 1764 (Charadriiformes, Scolopacidae) in Chile. Another species recorded in South America is Skrjabinoclava andersoni Cremonte & Navone 1999, which was isolated from the proventriculus of L. dominicanus and Larus atlanticus Olrog 1858 (Charadriiformes, Laridae) from Argentina (Cremonte & Navone, 1999;La Sala et al, 2009), the female of this species is similar to S. tupacincai and to the specimens isolated on this study, however the only way to distinguish each other is with the characteristics of the male spicules. The specimens from the present study were bigger that females of Skrjabinoclava spp.…”

“…Borgsteede et al 2003;Zhang & Beveridge, 2007;Acosta et al, 2010;Umur et al, 2010). Other species have been isolated in raptors; Synhimantus (Synhimantus) rectus (Molin 1860) Gendre 1920 and Synhimantus (Synhimantus) milvagoi Boero & Led 1971 in the proventriculus and gizzard of several Accipitriformes and Falconiformes from Brazil and Argentina (Boero & Led, 1971;Magalhães et al, 1994;Vicente et al, 1995;de Melo et al, 2013). The description of S. (S.) milvagoi from Boero & Led (1971) differs from the present species in several characteristics such as the location of the deirid, being more posterior in S. (S.) milvagoi, descending cephalic cordons and recurrent cephalic cordons being shorter, muscular and glandular esophagus shorter, vulva located at the posterior third and eggs a little more slender.…”