The development of Anuran kidney

Part II. The development of the mesonephros ofBufo melanostictus Schneider
  • A. Ramakrishna Reddy


  1. 1.

    The general development of the mesonephros inBufo is similar to that ofRana (Gray, 1930) andRhacophorus (Reddy, 1938).

  2. 2.

    Each malpighian unit arises from a nephroblast vesicle which is a condensation of 14 to 16 blastema cells.

  3. 3.

    10 to 13 nephroblast vesicles are developed.

  4. 4.

    The rudiment of the early peritoneal funnel appears as condensation of 4 to 6 blastema cells in front of the nephroblast vesicles.

  5. 5.

    The condensation is simultaneous with that of the nephroblast vesicle.

  6. 6.

    The rudiment develops after the perfection of the early malpighian capsule and establishes a connection between the cœlom and blood circulation.

  7. 7.

    The early peritoneal funnels persist while early malpighian capsules with their tubules and glomeruli degenerate and disappear.

  8. 8.

    The straight tubules and their outgrowths arise from 13 to 15 condensations on the dorsomedian wall of the archinephric duct.

  9. 9.

    At the free end of the tubule is an abortive malpighian capsule.

  10. 10.

    At the free end of each outgrowth or secondary tubule is a condensation of capsuloblast vesicle.



Straight Tubule Blastema Cell Peritoneal Wall Secondary Tubule External Gill 

Reference Letters


Archinephric duct


Abortive malpighian capsule




Blood vessel


Point at which the peritoneal funnel is constricted off


Degenerating malpighian glomerules


Capsule of the early malpighian unit in which the glomerulus has completely disappeared


Early malpighian capsule


Peritoneal funnel

F.N.1 &F.N.2

Peritoneal funnels produced from funnel-forming tubule


Funnel-forming tubule




Opening of the peritoneal funnel into the blood vessel

M.C.,1M.C.2 &M.C.3

Later malpighian capsules developed from capsuloblast vesicles


Opening of the peritoneal funnel into the cœlom

O.St.1 &O.St.2

Outgrowths of the straight tubule


Peritoneal wall


Rudiment of the peritoneal funnel


Rudiment of the funnel-forming tubule


Rudiment of the early malpighian glomerulus


Rudiment of the straight tubule


Straight tubule




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Copyright information

© Indian Academy of Sciences 1938

Authors and Affiliations

  • A. Ramakrishna Reddy
    • 1
  1. 1.Annamalai UniversityAnnamalainagar, S. India

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