لخّصلي

A comparative morphological study of preimaginal stages (larvae and pupae) of Calliphora vicina Robineau-Desvoidy, 1830 is presented.Our results focus on showing the changes observed throughout development for the most important structures in the cephalic region (sensilla of maxillary palpus, antennae and oral ridges), the thoracic region (the first segment and its anterior spinose band) and in the anal division of the abdominal region (posterior spiracles and shape of the papillae).For the morphological comparison of larval instars I, II and III, and pupae of C. vicina, different larval regions (cephalic, thoracic and abdominal, including anal division), as well the internal chitinised cephalopharyngeal skeleton, were considered separately. The entomological samples came from laboratory colonies bred under controlled environmental conditions (25 oC and 60% relative humidity).

A comparative morphological study of preimaginal stages (larvae and pupae) of
Calliphora vicina Robineau-Desvoidy, 1830 is presented. The entomological samples came
from laboratory colonies bred under controlled environmental conditions (25 oC and 60%
relative humidity). a recently published technique to clear Diptera larvae for light microscopy
and a standard protocol for scanning electron microscopy were used. For the morphological
comparison of larval instars I, II and III, and pupae of C. vicina, different larval regions
(cephalic, thoracic and abdominal, including anal division), as well the internal chitinised
cephalopharyngeal skeleton, were considered separately. Our results focus on showing the
changes observed throughout development for the most important structures in the cephalic
region (sensilla of maxillary palpus, antennae and oral ridges), the thoracic region (the first
segment and its anterior spinose band) and in the anal division of the abdominal region
(posterior spiracles and shape of the papillae). In addition, some morphological structures are
described or pictured for the first time, such as the ventral organ and the anterior spiracle of
larva I and the antenna sensilla, Keilin’s organ and wrinkled area of the anal division of all
instars. The cephalopharyngeal skeleton is an important structure for the taxonomy of Diptera
larvae in all instars, including Calliphoridae. Our observations in C. vicina indicate that an
indepth review of the sclerite composition is needed. Pupae and larvae stages can only be
compared by following the segmentary spinose bands and the anal segment, where the
morphology of the posterior spiracles and papillae can be observed, in some cases despite the
reduced condition of the latter.