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Progarnia archosauriae nov. gen., nov. sp. (Haemosporina: Garniidae), a blood parasite of Caiman crocodilus crocodilus (Archosauria: Crocodilia), and comments on the evolution of reptilian and avian haemosporines

Published online by Cambridge University Press:  06 April 2009

R. Lainson
R. Lainson
Affiliation:
Departamento de Parasitologia, Institute Evandro Chagas, Caixa Postal 691, 66017-970 Belém, Pará, Brasil
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Summary

Progarnia archosauriae nov. gen., nov. sp. (Haemosporina: Garniidae) is described in the blood of the South American caiman, Caiman crocodilus crocodilus (Archosauria: Crocodilia). The parasite undergoes merogony and gametogony principally in leucocytes and thrombocytes, but also invades erythrocytes in which it produces no ‘malarial’ pigment. It thus shares features of Fallisia and Garnia which are, respectively, intra-leucocytic and intra-erythrocytic haemosporines of the family Garniidae in present-day lizards. This, and the antiquity of the order Crocodilia, suggests that it was from such a parasite that the existing reptilian and avian haemosporines evolved. An overall evolutionary pattern is suggested.

Keywords

HaemosporinaGarniidaeProgarnia archosauriae nov. gen., nov. spCaiman c. crocodiluscrocodileBrazil
Type
Research Article
Information
Parasitology , Volume 110 , Issue 5 , June 1995 , pp. 513 - 519
Copyright
Copyright © Cambridge University Press 1995

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