The British Herpetological Society

The Herpetological Journal is the Society's prestigious quarterly scientific journal. Articles are listed in Biological Abstracts, Current Awareness in Biological Sciences,Current Contents, Science Citation Index, and Zoological Record.

The 2017/18  impact factor of the Herpetological Journal is 1.268

  pdfBHS Ethics Policy

Download Access:

  • The latest 20 issues can be downloaded when logged in with a Herpetological Journal subscription membership.
  • Individual articles can be purchased for download.
  • Older issues and occasional Open Access articles are available for public download

pdf 01. The paradoxical frog Pseudis paradoxa: larval anatomical characteristics, including gonadal maturation

843 downloads

Open Access

Authors: Downie, J.R.; Sams, K. & Walsh, P.T.

Abstract: The genus Pseudis is unique amongst anuran amphibians in that body growth occurs mostly or entirely in the larval phase, with huge tadpoles metamorphosing into smaller but adult-sized frogs. Selected organ systems were studied in tadpoles of the paradoxical frog Pseudis paradoxa in order to determine whether they have any special features associated with their large size and unique life history. Testes of large tadpoles were well developed with spermatogenesis proceeding before metamorphosis; ovaries were also well developed in later stage tadpoles with large pre-vitellogenic oocytes. In later stage tadpoles, unusually for anuran larvae, the intestine had developed longitudinal internal ridges, increasing the internal surface area. Lungs of later stage tadpoles showed internal septation, again an unusual feature for anuran larvae. Finally, later stage tadpoles had a considerably thickened epidermis compared to earlier stages, though no sign of adult-type glands. Overall, these results suggest that as Pseudis tadpoles grow in size beyond the norm for conventional anuran larvae, a suite of features normally associated with adult anurans begins to develop before metamorphosis.

Keywords: ANURA, TRINIDAD, TADPOLE, AMPHIBIANS

Submissions:

For further information and submission guidelines please see our Journal Instructions to Authors

 

 

NOTE: as of January 2017, all new editions of the HJ are ONLY available online via the BHS website. The BHS no longer has a commercial hosting agreement with Ingenta  -  although editions prior to end 2016 remain accessible on Ingenta .  Those editions are of course also accessible on the BHS website for subscribers with an active and valid membership.  Should you experience any difficulty accessing HJ editions via the website or have any queries in this regard, please contact