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BIBTEX RIS

On the Formation of the Tracheal Funnel in Anasa Tristis DeG. Induced by the Parasite Trichopoda Pennipes Fabr

1942; Oxford University Press; Volume: 35; Issue: 1 Linguagem: Inglês

10.1093/aesa/35.1.68

ISSN

1938-2901

Autores

Raimon L. Beard,

Tópico(s)

Hemiptera Insect Studies

Resumo

The squash bug, Anasa tristis DeG., is commonly parasitized by a tachinid fly, Trichopoda pennipes Fabr. Within the body cavity of the host the parasite spends its three larval instars, the first of which may be found free in either the thoracic or abdominal cavity of the bug. Prior to the first molt, the maggot makes its way to the thorax, if not already there, and attaches itself to a tracheal trunk of the host with the result that its own tracheal system, through its posterior spiracles, has direct access to an adequate oxygen supply. Of 309 recorded cases, 304 were attached to metathoracic tracheae, on either the right or left side. The other five were connected to tracheae leading from the mesothoracic spiracles.

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