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Metacercariae of Galactosomum lacteum (Jägerskiöld, 1896) Looss, 1899 (Heterophyidae) from marine teleosts in the Gulf of Cagliari (southern Sardinia, Italy)

Published online by Cambridge University Press:  01 December 2007

Jacopo Culurgioni
Affiliation:
Dipartimento di Biologia Animale ed Ecologia, Viale Poetto 1, 09126 Cagliari, Italy
Valeria D'Amico
Affiliation:
Dipartimento di Biologia Animale ed Ecologia, Viale Poetto 1, 09126 Cagliari, Italy
Vincenza Figus*
Affiliation:
Dipartimento di Biologia Animale ed Ecologia, Viale Poetto 1, 09126 Cagliari, Italy
*

Abstract

Galactosomum lacteum (Jägerskiöld, 1896) Looss, 1899 metacercariae, encysted on the optic nerve, on the brain and/or on the muscle and the connective of the pharynx and oesophagus, were found in Spicara maena L., S. flexuosa Rafinesque, 1810, S. smaris L. (Centracanthidae), Gobius cruentatus Gmelin, 1789 (Gobiidae), Symphodus tinca L., S. mediterraneus L. (Labridae), Serranus cabrilla L. (Serranidae), Diplodus sargus L. and D. annularis L. (Sparidae) caught in the Gulf of Cagliari (southern Sardinia, Italy). Excysted specimens were identified by some distinctive morphological features: more or less expanded forebody, depending on whether the specimens were living or fixed; tubular excretory bladder extending to the posterior border of the ovary; two-chambered seminal vesicle; asymmetrical and parenchymatous ventral sucker with lines of spines within its cavity; and unarmed gonotyle. Comparison has been made with the congeneric species metacercaria, G. timondavidi Pearson & Prévot, 1971, also registered in the Mediterranean Sea.

Type
Research Papers
Copyright
Copyright © Cambridge University Press 2007

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