The Dimorphism of Polystoma integerrimum (Frölich) Rudolphi and its Bearing on Relationships within the Polystomatidae: Part II
- 1 September 1960
- journal article
- research article
- Published by Cambridge University Press (CUP) in Journal of Helminthology
- Vol. 34 (3-4) , 323-346
- https://doi.org/10.1017/s0022149x00021246
Abstract
The neotenic adult resembles the normal adult in general form, but is considerably smaller, varying between 1·4 and 3·5 mm. in length. The caudal disc bears three pairs of suckers, incompletely developed anchor hooks, and infrequently, persistent larval booklets (Fig. 7, l.h.).Fine brown granules colour the intestine, and anteriorly four pigment spots mark the eyes. The gonopore (Fig. 7, gon.) is posteriorly placed, lying some distance behind the transverse level of the excretory openings. Vaginal prominences and copulation pores are absent.Keywords
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