A checklist of marine larval trematodes (Digenea) in molluscs from Argentina, Southwestern Atlantic coast

Abstract

A checklist of cercariae parasitizing marine molluscs from Patagonian coast, Argentina, based on literature sources and new records here presented. In total, cercariae of 31 species of marine digeneans, including 11 new records here presented, are known to infect 20 species of molluscs (14 in nine gastropods species; 17 in 11 bivalve species). These records include two species of Aporocotylidae, four Bucephalidae, one Fellodistomidae, five Gymnophallidae, one Hemiuroidea, four Lepocreadiidae, two Microphallidae, five Monorchiidae, one Notocotylidae, one Philophthalmidae, two Renicolidae, one Schistosomatidae and two Zoogonidae. For each digenean species, their hosts, habitat type, localities, infection site, prevalence, life cycle advances, and access numbers in helminthological collections and GenBank, when available, are detailed. Regarding the life cycles, eight were completely elucidated and four were partially elucidated. Moreover, there are molecular data for 15 species. The data here presented constitutes an advance in the parasites biodiversity knowledge and their life cycles.

Survey of trematodes in intertidal snails from Patagonia, Argentina: new larval forms and diversity assessment

“…To date, 23 species of cercariae belonging to this family have been described (Villot, 1875;Macfarlane, 1951;Ito & Shimura, 1980;Stunkard 1980a, b;Watson, 1984;Aguirre-Macedo & Kennedy, 1999;Hassanine, 2006;Averbuj & Cremonte, 2010 and references therein). Six of them were recorded in the Southern Hemisphere and three were recorded in the Argentinean Sea, including the cercariae here described (Martorelli, 1991;Averbuj & Cremonte, 2010;Bagnato et al, 2015). Lepocreadiidae gen. et sp.…”

“…The species described in this study were recorded previously by Bagnato et al (2015), summarizing a total of 12 digenean larval species found in Puerto Deseado. Of 11 digenean larvae that use snails as the first intermediate host, seven use shorebirds as the definitive host (two Microphallidae, one Notocotylidae, two Renicolidae, one Philophtalmidae and one Schistosomatidae) and the other four use fish (one Hemiuroidea, two Lepocreadiidae and one Zoogonidae) (Gibson et al, 2002;Jones et al, 2005;Bray et al, 2008).…”

“…Mounted specimens of new species were deposited at the Parasitological Collection (CNP-Par) of Instituto de Biología de Organismos Marinos (IBIOMAR), Puerto Madryn, Argentina. Molecular data were taken from Bagnato et al (2015) for species described for the first time. For each studied species, comparisons with other available sequences of the same family were made using NCBI BLAST (https://blast.ncbi.nlm.nih.gov/) to support the morphological diagnosis.…”

“…Prevalence and diversity indexes of digenean larvae from gastropod species in Puerto Deseado, Santa Cruz Province and Puerto Madryn, Chubut Province, Argentina, during winter 2009 and summer 2010 (Gymnophalloides nacellae is excluded because it was found only at the metacercaria stage). Parasite species in bold are described in the present study; all species were recorded previously by Gilardoni et al (2011) and Bagnato et al (2015).…”

Parasites in two coexisting bivalves of the Patagonia coast, southwestern Atlantic Ocean: The Puelche oyster (Ostrea puelchana) and false oyster (Pododesmus rudis)

“…Studies on parasites in coexisting bivalves are scarce and mostly consider metazoan parasites (Bagnato et al, 2015). The host range of a parasite may be due to phylogenetic, ecological, physiological and immunological factors (Detwiler and Janovy, 2008).…”