The Excretory System in Digenea (Trematoda). IV. A Study of the Structure and Development of the Excretory System in a Cystocercous Larva, Cercaria pekinensis nov. spec
Open Access
- 1 August 1921
- journal article
- research article
- Published by Cambridge University Press (CUP) in Parasitology
- Vol. 13 (3), 205-212
- https://doi.org/10.1017/s0031182000012464
Abstract
1. Cercaria pekinensis, a new cystocercous cercaria, is described.2. The excretory system of the developed cercaria consists of a bladder, a drainage channel through the tail and a pair of anterior collecting tubules, each of which receives eight main (tertiary) branches. Each branch is composed of 2 × 4 × 4 units. The posterior-most branch cares for the drainage of the tail, including the corresponding flapper.3. A study of representative stages in development shows that the common denominator of the excretory system is α + β, while the pattern of the developed cercaria is expressed by 4 (α)2 + 4 (β)2.4. The fundamental pattern of tie cercaria is likewise found in the sporocyst.5. These data have a significant bearing on the application of mathematics to the problems of growth and development.Keywords
This publication has 5 references indexed in Scilit:
- Larval Flukes from GeorgiaTransactions of the American Microscopical Society, 1921
- THE EXCRETORY SYSTEM IN DIGENEA. IThe Biological Bulletin, 1919
- A New Cystocercous CercariaJournal of Parasitology, 1919
- Two New Cystocercous Cercariae from North AmericaJournal of Parasitology, 1918
- Notes on Two Free-Living Larval Trematodes from North AmericaJournal of Parasitology, 1916