Dr. Murai Éva szerk.: Parasitologia Hungarica 11. (Budapest, 1978)
Histo-morphological Structure of the Muscular Organ» Parasit, Hung. 11. 1978 of Stunkardia minuta Palmieri et Sullivan, 1977 (Trematoda: Pararnphistomata) Dr. Ottó SEY — Dr. Jame* R. PALMIERI* Department of Zoology, College of Education, Pécs, Hungary — University of California, ICMR, Institute for Medical Research. Kuala Lumpur. Malaysia "Histo-morphological structure of the muscular organs of Stunkardia minuta Palmieri et Sullivan, 1977 (Trematoda: Pararnphistomata)" - Sey, O. - Palmieri, J. R. - Parasit.Hung. 11. 27-29. 1978. ABSTRACT. Stunkardia minuta Palmieri et Sullivan, 1977 has a pharynx of Scle- roporum, a genital atrium of Gracile and an acetabulum of Cladorchis type. Characteristics features of these muscular organs are discussed and compared to those of related types of genital atrium. Forty years have passed since the publication of NASMARK's monograph (1937) in which he gave a new concept to the classification of amphistomes. In this concept, the structure of the muscular organs (pharynx, genital atrium and acetabulum), seen in median sagittal sections are of basic importance. NASMARK's investigations (1937) comprised the species of Param phis torn inae completely but the remaining fourteen subfamilies are mentioned in the "Preliminary notes". Adaptation of NASMARK's idea to species other than Param phis torn inae seems to be a useful contribution to the examination of their morphological characters, too. Material and Methods The test material was collected at Telok Anson, Malaysia from box-tortoise (Cuora amboinensis). Eight specimens were at our disposal for median sagittal sections, prepared in 8-lOji thick and stained in haematoxyline and eosin. Koult» and Discussions As regards the structure, the pharynx of Stunkardia minuta belongs to "Group I A" (NASMARK, 1937), characterized by the presence of primary pharyngeal sacs. This group includes several types of pharynxes, S. minuta 's is identical with the Scleroporum type (Figs. 1 and 2). This type has been found in Schizamphistomum scleroporum (Creplin, 1844), an amphistome of marine turtles. Up to now others than this single species have not been known to share this type of pharynx. The development of primary pharyngeal sacs is stronger and that of the basis circular layer is weaker in the pharynx of S. minuta than in the Scleroporum type. A constriction at the anterior part of the pharynx of this species is also observable but it is not so distinct and the constricted part has fewer circular muscle units than that of the Scleroporum type (Fig. 1). LOOSS (1912) is of the opinion that that part is a pre-sphincter, NÄSMARK (1937), on thebasis of old and thick sections regards it "a half constricted partof the pharynx". * This study was supported in part by grant AI 10051 (UC ICMR) to the Department of International Health, School of Medicine, University of California, San Francisco, from the National Institute of Allergy and Infectious Diseases, National Institutes of Health, U.S. Public Health Service.
