A histopathological survey of the razor clam Ensis macha (Pharidae) along the Patagonian Argentina coast

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

“…Prevalence was calculated as the total number of bivalves parasitized divided by the number of bivalves examined, and mean intensity as the number of parasites per histological section divided by the number of parasitized sample bivalves (Bush et al, 1997). To evaluate the variables (water temperature, sex, developmental gonad stages and shell height) affecting the presence and abundance of parasites in wild P. rudis population, Generalized Linear Models (GLMs) were applied as described in Vázquez et al (2013). All statistical analyses were performed in R (R Development Core Team 2011).…”

First elucidation of a blood fluke (Electrovermis zappum n. gen., n. sp.) life cycle including a chondrichthyan or bivalve

“…Tail bearing fin fold Cercaria amphicteis (North-central Gulf of Mexico)13b. Tail lacking fin foldcercariae of Cardicola parvus (Northwest Atlantic Ocean), C. fosteri (Northern Pacific Ocean; Great Australian Bight, South Pacific Ocean), C. orientalis (Northern Pacific Ocean), C. laruei (Northwest Atlantic Ocean), C. opisthorchis (Northern Pacific Ocean); and cercaria infecting Reteterebella aloba (Great Australian Bight, South Pacific Ocean)*The cercariae infecting purplish tagelus, Tagelus divisus (Spengler, 1794) (Cardiida: Solecurtidae) (see Fraser, 1967) and razor clam , Ensis macha (Molina, 1782) (Adapedonta: Pharidae) (see Vázquez et al, 2013) are excluded because neither was morphologically described and no voucher specimen exists.Herein, we describe a new aporocotylid and its life cycle in the intertidal zone of a high-energy beach adjacent to the mouth of Mobile Bay (north-central Gulf of Mexico). This is the first elucidated aporocotylid life cycle that includes a chondrichthyan definitive host (lesser electric ray, Narcine bancroftii [Griffith and Smith, 1834] Carvalho, 2001 [Torpediniformes: Narcinidae]) or a bivalve intermediate host (variable coquina clam, Donax variabilis Say, 1822 [Cardiida: Donacidae]).…”

“…*The cercariae infecting purplish tagelus, Tagelus divisus (Spengler, 1794) (Cardiida: Solecurtidae) (see Fraser, 1967) and razor clam , Ensis macha (Molina, 1782) (Adapedonta: Pharidae) (see Vázquez et al, 2013) are excluded because neither was morphologically described and no voucher specimen exists.…”

Estrategias de transmisión de digeneos parásitos que utilizan gasterópodos como hospedadores intermediarios en la costa patagónica

“…Los estudios sobre larvas de digeneos que afectan a gasterópodos y a bivalvos del litoral patagónico se han incrementado en los últimos años y están referidos principalmente a aspectos taxonómicos (Martorelli, 1991;Martorelli & Morriconi, 1998;Cremonte, 2001;Martorelli et al, 2005;Cremonte et al, 2008;Averbuj & Cremonte, 2010;Vázquez et al, 2013) y patológicos (Ituarte et al, 2001;Cremonte & Ituarte, 2003;Cremonte & Figueras, 2004;Cremonte et al, 2005;Ituarte et al, 2005;Vázquez et al, 2006). Si bien en los últimos años se logró un avance considerable en la dilucidación de algunas de las etapas de los complejos ciclos de vida de los digeneos, sólo dos de ellos se conocen de forma completa en la región, el ciclo de vida del gymnofálido Bartolius pierrei Cremonte, 2004 y el ciclo de vida del monórquido Proctorema bartolii Gilardoni, Carballo & Cremonte, 2013.…”