Trematodes of Fishes from the Red Sea. Part 6. On Five Distomes including One New Genus and Four New Species

Abstract

Diagnosis: Body tapering anteriorly, broadly rounded posteriorly; 2.16 and 2.03 long, 1.21 and 1.01 maximum width. Acetabulum 0.33 in diameter, near anterior third of body. Oral sucker 0.21 by 0.25 in diameter; forebody 0.33 long. Prepharynx short; pharynx 0.98 long by 0.14 wide; esophagus short; intestinal ceca ending 0.2 from posterior end of body. Testes tandem, lobed, wider than long, 0.29 by 0.52 to 0.59; in posterior half of body. Cirrus sac curved in an S-shape, extending from middle of acetabulum to genital atrium near pharynx. Genital pore median, ventral to pharynx. Ovary directly anterior to testes; wider than long; lobed; size 0.16 by 0.24. Seminal receptacle large, pyriform, immediately anterior and to right of ovary. Vitellaria mostly extracecal, from level of pharynx to near posterior end of body. Uterus between ovary and acetabulum; eggs yellowish, thin-shelled with long filament about twice as long as egg shell which measures 0.04 to 0.06 by 0.03 to 0.04. This species is previously known from Hypodytis rubipinnis in the Inland Sea, Japan.