Juday, Chancey (ed.) / Transactions of the Wisconsin Academy of Sciences, Arts and Letters
volume XXI (1924)
Pearse, A. S.
Observations on parasitic worms from Wisconsin fishes, pp. -160 PDF (4.1 MB)
150 Wisconsin Academy of Sciences, Arts, and Letters. Sixteen specimens of this trematode were taken from the intes- tine of a mooneye caught in Lake Pepin, June 25, 1920. Two other mooneyes were captured at the same time. One contained twenty-one of the parasites; the other, none. Allocreadium armatutm MacCallum (Fig. 8) Length of a large contracted specimen, 3.2 mm. (U. S. Nat. Mus., Cat. No. 7620); width, 1.08 mm.; diameter of oral sucker, .35 mm.; diameter of acetabulum, .6 mm.; egg, .11 by .07 mm. Length of a smaller expanded specimen, 2.8 mm.; width, .53 mm. Cuticle minutely denticulate, especially toward the anterior end. The diameter of the oral sucker is nearly two-thirds that of the acetabululm, which is situated at the posterior end of the an- terior third of the body. A short prepharynx is present. The pharynx is about half the diameter of the oral sucker in length, and it is about as wide as long. The intestinal rami are slender and reach nearly to the posterior end of the body. The ovary is about half as long as the anterior testis and oval, with the long axis extending across the body. It lies on the right side of the body just behind the acetabulum. The uterus is coiled between the acetabulum and the anterior testis, lying mostly on the left side. It may contain as many as eleven eggs. The genital pore is on the median line anterior to the acetabulum. The vitel- line glands surround the intestinal rami in the posterior third of the body and extend forward outside the rami nearly to the middle of the acetabulum. The two testes are somewhat lobate and are slightly elongated; their long axes lying across the body. They lie close together immediately posterior to the ovary between the intestinal rami, one being directly behind the other. The posterior testis is slightly larger than the anterior. The cirrus pouch is oval, about a third as wide as long, and is about as long as the diameter of the acetabulum. Sixty-five specimens were taken from a sheepshead, Aplodinotus grunniens Rafinesque, caught in Lake Pepin, Wisconsin, July 9, 1920. Other specimens were taken from the same locality and species on July 10, 13; from sunfishes Eupomotis gibbosus (Lin- naeus) at Sturgeon Bay, Wisconsin, July 19, 23.
This material may be protected by copyright law (e.g., Title 17, US Code).| For information on re-use, see http://digital.library.wisc.edu/1711.dl/Copyright