Morphological Study of the Larval Spiracular System in Eight Lutzomyia Species (Diptera: Psychodidae)
Open Access
- 1 January 1998
- journal article
- Published by FapUNIFESP (SciELO) in Memórias do Instituto Oswaldo Cruz
- Vol. 93 (1) , 71-79
- https://doi.org/10.1590/s0074-02761998000100014
Abstract
The morphology of the spiracles of fourth instar larva in eight sandfly species were examined by light and scanning electron microscopy. Species studied were: Lutzomyia longipalpis (Lutz & Neiva), L. ovallesi (Ortiz), L. youngi Feliciangeli & Murillo, L. evansi (Nuñez-Tovar), L. trinidadensis (Newstead), L. migonei (França), L. absonodonta Feliciangeli, and L. venezuelensis (Floch & Abonnenc). In larvae of all eight species both thoracic and abdominal spiracles are located at the top of a globular bulge. Their structure consists of a spiracular plate with a sclerotized central portion and a rose-like peripheral portion. The latter has circularly arranged papillae, separated from each other by elongated septa. Each papilla is longitudinally crossed by a fine cleft dividing it into two identical parts. The taxonomic and adaptative value of spiracular morphology is discussed.Keywords
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