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Scanning electron microscope observation of cephalic segments of second-instar larvae of Lucilia sericata (Meigen) (Diptera：Calliphoridae) and discovery of a new sensillum
Received date: 2013-07-11
Online published: 2013-12-20
Supported by
Supported by the Program for National Science Fund for Fostering Talents in Basic Research (No. NSFC-J1210075) and New Century Excellent Talents in University (No. NCET-12-0783)
Objective To observe the sensilla on the cephalic segments of the second-instar larvae of Lucilia sericata (Meigen) by scanning electron microscopy (SEM) and to provide new morphological information and screen out the characteristic for species identification. Methods From June to August 2012, adult females of L. sericata were collected in the Songshan National Nature Reserve in Beijing and the campus of Beijing Forestry University and was then reared in the laboratory to obtain larval specimens. The sensilla on the cephalic segments of larvae were observed by SEM. Results The cephalic segment bore an antenno-maxillary sensory complex formed by the antenna (a big coeloconic sensillum), three big coeloconic sensilla, three basiconic sensilla, and six small coeloconic sensilla on the inner surface of maxillary palp, and two big coeloconic sensilla on the outer surface of maxillary palp. A pair of pit sensilla were observed on the oral groove, and each labial organ was equipped with a big coeloconic sensillum and a pit sensillum. Conclusion The new morphological characteristics of the larvae of Calliphoridae, such as the pit sensillum on labial organ and the small coeloconic sensilla on maxillary palp, are discovered. The small coeloconic sensilla can be used as a morphological characteristic for identification of the second-instar larvae of L. sericata.
Key words： Lucilia sericata; Second-instar larva; Sensillum
CHEN Yi-ou, LI Kai, ZHANG Dong . Scanning electron microscope observation of cephalic segments of second-instar larvae of Lucilia sericata (Meigen) (Diptera：Calliphoridae) and discovery of a new sensillum[J]. Chinese Journal of Vector Biology and Control, 2013 , 24(6) : 491 -493 . DOI: 10.11853/j.issn.1003.4692.2013.06.004
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