Silva ANB, Andrade HTA, Ríos-Velásquez CM, Pessoa FAC, Medeiros JF. Larval ontogeny and morphological variations of Psaroniocompsa incrustata (Lutz) (Diptera: Simuliidae) in the State of Rio Grande do Norte, Northeastern Brazil.
Neotrop Entomol 2009;
38:360-365. [PMID:
19618052 DOI:
10.1590/s1519-566x2009000300010]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2007] [Accepted: 04/27/2009] [Indexed: 05/28/2023]
Abstract
Psaroniocompsa incrustata (Lutz) is an antropophilic species widely distributed in Central and South America. It is the vector of Onchocerca volvulus in a Brazilian focus and has been considered a plague in several areas of this country. The objective of this study was to determine the number of larval instars and to describe the morphological variations and teratologies of a population of P. incrustata from the Pium river, Rio Grande do Norte State. The number of larval instars was determined measuring the head capsule lateral length of 3,164 larvae. The larval instars were determined using the measurement frequency distribution, Student's t-test, the Dyar and Crosby growth rules. Eight larval instars were determined for P. incrustata. A high rate of teratologies (9.6%) in the hypostomium and variations in the lateral serrations and the latero-mandibular process were found.
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