Abstract
BackgroundHaving the right identification is essential in the field of entomology. The scanning electron microscopy allows rapid and accurate identification of different species of flies since a better visualization of the external morphology of immature and some adults is possible. The aim of this study is to describe some ultrastructures of three flies in the Mesembrinellidae family: Mesembrinella bellardiana; Mesembrinella bicolor and Mesembrinella semihyalina, all examined by scanning electron microscopy to help increase the anatomical database on flies and deal with phlylogenetic implications.ResultsThe flies were examined under JEOL 6390LV scanning electron microscope (SEM). The microtrichia morphology of the antennae is similar to that of other and are present on all antennal surface with variable distribution. The chaetic sensilla were observed only in the scape (chaetic sensilla I) and pedicel segments (chaetic sensilla I-III). Three types of sensilla: trichoidea, basiconic and clavate were observed in the first flagellomere of M. bellardiana; and two types of sensilla: trichoidea and basiconic were noticed in M. bicolor and M. semihyalina. Olfactory pits were observed in both gender of M. bellardiana and female of M. bicolor. The maxillary palp of the Mesembrinella species in this study does not show sexual dimorphism.ConclusionThis investigation provided new findings of some diagnostic structures of flies using SEM, since many of them could have not been observed just by the use of light microscopy.
Highlights
Having the right identification is essential in the field of entomology
All examined heads are equipped with a pair of antennae typical of cyclorrhaphan Diptera, which were frontally situated between the large compounds eyes (Fig. 1a–e)
There is a group of seven chaetic sensilla (Ch I) of similar length, which was noticed arranged in a single row and curving over the base of the pedicel (Fig. 2a–b)
Summary
Having the right identification is essential in the field of entomology. The scanning electron microscopy allows rapid and accurate identification of different species of flies since a better visualization of the external morphology of immature and some adults is possible. The aim of this study is to describe some ultrastructures of three flies in the Mesembrinellidae family: Mesembrinella bellardiana; Mesembrinella bicolor and Mesembrinella semihyalina, all examined by scanning electron microscopy to help increase the anatomical database on flies and deal with phlylogenetic implications. Researches involving the family are restricted to the description and identification of species or the discussion of phylogenetic and systematic issues, with implications for taxonomic classification [23,24,25]. Species in this group are considered not adapted to the environment modified by man and have a very. The purpose of this study was to examine in details these sensorial organs on the aforementioned species to help increase the anatomical database for flies, arising implications for future phylogenetic analyses to be conducted with the group
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