Access

You are not currently logged in.

Access JSTOR through your library or other institution:

login

Log in through your institution.

If You Use a Screen Reader

This content is available through Read Online (Free) program, which relies on page scans. Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.

Direct Development in Eleutherodactylus coqui (Anura: Leptodactylidae): A Staging Table

Daniel S. Townsend and Margaret M. Stewart
Copeia
Vol. 1985, No. 2 (May 3, 1985), pp. 423-436
DOI: 10.2307/1444854
Stable URL: http://www.jstor.org/stable/1444854
Page Count: 14
  • Read Online (Free)
  • Download ($12.00)
  • Subscribe ($19.50)
  • Cite this Item
Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Direct Development in Eleutherodactylus coqui (Anura: Leptodactylidae): A Staging Table
Preview not available

Abstract

The Puerto Rican frog Eleutherodactylus coqui has terrestrial reproduction and direct development, as is the case for all known species of this large, neotropical group. To facilitate field measurements of embryonic age in E. coqui, a staging table was developed based on changes in the external morphology of embryos. Pre-hatching development was divided into 15 stages. Principal diagnostic features include formation of external gills, progressive pigmentation of the eyes, growth and differentiation of the limbs, development of endolymphatic calcium deposits, expansion of a pigmented body wall, growth of a large, vascularized tail and changes in embryonic behavior. We have used the table to stage the eggs of E. antillensis and E. portoricensis, related Puerto Rican species. A literature review suggests that our table may be useful as a general staging scheme for the genus.

Page Thumbnails

  • Thumbnail: Page 
423
    423
  • Thumbnail: Page 
424
    424
  • Thumbnail: Page 
425
    425
  • Thumbnail: Page 
426
    426
  • Thumbnail: Page 
427
    427
  • Thumbnail: Page 
428
    428
  • Thumbnail: Page 
429
    429
  • Thumbnail: Page 
430
    430
  • Thumbnail: Page 
431
    431
  • Thumbnail: Page 
432
    432
  • Thumbnail: Page 
433
    433
  • Thumbnail: Page 
434
    434
  • Thumbnail: Page 
435
    435
  • Thumbnail: Page 
436
    436