scholarly journals Chrysomya megacephala (Fabricius)(Diptera : Calliphoridae) development : Rate, variation and the implications for forensic entomology

1994 ◽  
Vol 45 (4) ◽  
pp. 303-309 ◽  
Author(s):  
Jeffrey D. WELLS ◽  
Hiromu KURAHASHI
Keyword(s):  
Forensic Entomology ◽  
Development Rate ◽  
Rate Variation ◽  
Chrysomya Megacephala

scholarly journals Chrysomya megacephala (Fabricius, 1794) (Diptera: Calliphoridae) development by landmark-based geometric morphometrics of cephalopharyngeal skeleton: a preliminary assessment for forensic entomology application

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Li-Xuan Sim ◽  
Raja M. Zuha
Keyword(s):  
Geometric Morphometrics ◽  
Forensic Entomology ◽  
Larval Growth ◽  
Age Groups ◽  
Developmental Time ◽  
Canonical Variate ◽  
Centroid Size ◽  
Geometric Morphometric ◽  
Chrysomya Megacephala ◽  
Cephalopharyngeal Skeleton

Abstract Background Considering the practicality of geometric morphometrics which could discriminate insect species, this application was extended to the analysis of blow fly larval growth based on cephalopharyngeal skeleton. In forensic entomology, cephalopharyngeal skeleton plays a crucial role in species identification but the morphometric information of this part is scarce. In this study, Chrysomya megacephala (Fabricius, 1794) was reared in two study replicates in natural conditions and samplings were conducted at fixed daily intervals. Cephalopharyngeal skeletons were removed from larvae and mounted on glass slides. Images were obtained from the specimens; digitized and geometric morphometric analysis on C. megacephala cephalopharyngeal skeletons was performed with MorphoJ software based on the ordination of five landmarks. The assessments of this analysis were based on centroid size measurements, visualization on the landmarks displacements, classification of the relative landmarks by using canonical variate analysis, and ontogenetic allometry determination. Findings Centroid size was strongly correlated with developmental time (p < 0.05) and significantly different between daily intervals (p < 0.05). Ontogenetic allometric effect based on multivariate regression on Procrustes coordinates and centroid size was significant (p < 0.0001), indicating that shape was influenced by growth (60.3%). Disposition occurred on all landmarks during development and was further discriminated based on age groups. Conclusions Other than discriminating between species, geometric morphometrics was found to be practical to visualize larval growth based on cephalopharyngeal skeletons which can be useful in forensic entomology.

Study of the bioecology of Chrysomya (Robineau-Desvoidy, 1830) (Diptera: Calliphoridae): Collections

2021 ◽  
Vol 1 (2) ◽  
pp. 042-055
Author(s):  
Carlos Henrique Marchiori
Keyword(s):  
Organic Matter ◽  
Life Cycle ◽  
Geographic Distribution ◽  
Forensic Entomology ◽  
Cycle Length ◽  
Literature Search ◽  
Animal Origin ◽  
Chrysomya Megacephala ◽  
The Family ◽  
Taxonomic Groups

The Chrysomya primary importance to the field of medico legal Forensic Entomology is due to the genus' predictable life cycle length, allowing researchers to accurately estimate a postmortem interval. The aim of this study was to carry out a bibliographical summary on the blowflies of the genus Chrysomya (Insecta: Calliphoridae) with emphasis on the species: Chrysomya albiceps (Wiedemann, 1819) (Diptera: Calliphoridae), Chrysomya megacephala, (Fabricius, 1794) (Diptera: Calliphoridae) and Chrysomya putoria (Wiedemann, 1830). The mini review consists of bibliographical research on the muscoid dipterans (Muscomorpha) (Order: Diptera). The research was carried out in studies related to quantitative aspects of the Family and Species (taxonomic groups) and in conceptual aspects such as origin, geographic distribution, biology, life cycle, as a secondary vector of enterobacteria, for causing secondary myiasis and importance in Forensic Emtomology. A literature search was carried out containing articles published from 1971 to 2021. The mini review was prepared in Goiânia, Goiás, from August to September 2021, through the Online Scientific Library (Scielo) and internet. This is a family of blowflies of great ecological and medical-sanitary importance, as they are decomposers of organic matter, with their larvae usually developing in decayed material of animal origin, decomposing it and quickly consuming the carcasses, thus removing possible sources of diseases and recycling nutrients.

scholarly journals Influence of photoperiod on body weight and depth of burrowing in larvae of Chrysomya megacephala (Fabricius) (Diptera, Calliphoridae) and implications for forensic entomology

2006 ◽  
Vol 50 (1) ◽  
pp. 76-79 ◽  
Author(s):  
Leonardo Gomes ◽  
Guilherme Gomes ◽  
Helena Gutierrez Oliveira ◽  
Marcos Rogério Sanches ◽  
Claudio José Von Zuben
Keyword(s):  
Body Weight ◽  
Forensic Entomology ◽  
Chrysomya Megacephala

scholarly journals Behavior of the combined radial post-feeding larval dispersal of the blowflies Chrysomya megacephala and Chrysomya albiceps (Diptera, Calliphoridae) and implications for forensic entomology

2007 ◽  
Vol 50 (2) ◽  
pp. 279-288 ◽  
Author(s):  
Leonardo Gomes ◽  
Marcos Rogério Sanches ◽  
Claudio José Von Zuben
Keyword(s):  
Larval Dispersal ◽  
Forensic Entomology ◽  
Legal Medicine ◽  
Life Stages ◽  
Average Depth ◽  
Post Mortem ◽  
Chrysomya Megacephala ◽  
Chrysomya Albiceps ◽  
Post Mortem Interval ◽  
Post Feeding

The aims of this work was to study the life stages of Chrysomya megacephala in a circular arena allowing the combined radial post-feeding dispersal from the center of the arena of C. albiceps and C. megacephala larvae. To determine the location of each pupa, the distance from the center, the depth and weight of each pupa formed were analyzed. For the larvae of C. albiceps, females released buried deeper than males, reaching an average depth of 10.74 cm and C. megacephala larvae presented greater average results than C. albiceps for all variables, particularly distance, which was 16.02 cm for this species and 12.30 cm for C. albiceps. C. albiceps larvae preyed on 30 C. megacephala larvae in both experiments. These results could be used in forensic entomology because the evaluation of Post Mortem Interval (PMI) was one of the most important aspects of legal medicine, and it could be underestimated if the older dispersing larvae or those that dispersed longer and faster or deeper, were not taken into account.

The Nocturnal Ovipositon Behavior of Chrysomya megacephala (Diptera: Calliphoridae) in Brazil and Its Forensic Implications

2020 ◽  
Author(s):  
L T Carneiro ◽  
W T A Azevedo ◽  
V M Aguiar ◽  
M S Couri
Keyword(s):  
Forensic Entomology ◽  
Oviposition Behavior ◽  
Total Darkness ◽  
Artificial Light ◽  
Fume Hood ◽  
Experimental Conditions ◽  
Important Species ◽  
Chrysomya Megacephala ◽  
Average Temperature ◽  
Males And Females

Abstract Chrysomya megacephala (Fab. 1794) (Diptera: Calliphoridae) is a very important species for forensic entomology, mainly contributing estimations of the postmortem interval (PMI) in judicial investigations. There are some doubts about the nocturnal oviposition of these flies, which could lead to errors in the PMI calculation. This study aimed to monitor the nocturnal oviposition behavior of this species through four experimental conditions carried out in laboratory. Ten cages, each containing five males and females (n = 100), were kept in a fume hood and subjected to total darkness or to artificial light for 11 consecutive hours. Two verifications were performed to determine whether the females deposited eggs on the substrate of ~20 g of chicken gizzards per cage. The first verification occurred at 9:00 pm in nocturnal experiments and at 09:00 am in diurnal experiments. The second verification occurred at 05:00 am in nocturnal experiments and at 05:00 pm in diurnal experiments. Each experiment lasted 5 d. Chrysomya megacephala deposited eggs at night under artificial light and in total darkness, but the amount of eggs was significantly lower when compared with the daytime experiments in dark conditions and under natural light. Oviposition occurred when the average temperature was around 25°C (± 2°C) and relative humidity around 73% (± 6%). Night oviposition is a possibility which should not be ruled out. Thus, future experiments are recommended.

Developmental Times of Chrysomya megacephala (Fabricius) (Diptera: Calliphoridae) at Constant Temperatures and Applications in Forensic Entomology

2016 ◽  
Vol 61 (5) ◽  
pp. 1278-1284 ◽  
Author(s):  
Yong-qiang Yang ◽  
Xue-bo Li ◽  
Ru-yue Shao ◽  
Zhou Lyu ◽  
Hong-wei Li ◽  
...  
Keyword(s):  
Forensic Entomology ◽  
Chrysomya Megacephala

scholarly journals Species-level identification of the blowfly Chrysomya megacephala and other Diptera in China by DNA barcoding

Genome ◽  
2017 ◽  
Vol 60 (2) ◽  
pp. 158-168 ◽  
Author(s):  
Deyi Qiu ◽  
Charles E. Cook ◽  
Qiaoyun Yue ◽  
Jia Hu ◽  
Xiaoya Wei ◽  
...  
Keyword(s):  
Chinese Medicine ◽  
Traditional Chinese Medicine ◽  
Forensic Entomology ◽  
Species Level ◽  
Native Range ◽  
Base Pairs ◽  
Chrysomya Megacephala ◽  
Disease Vector ◽  
Anthropogenic Dispersal ◽  
Level Identification

The blowfly Chrysomya megacephala, or oriental latrine fly, is the most common human-associated fly of the oriental and Australasian regions. Chrysomya megacephala is of particular interest for its use in forensic entomology and because it is a disease vector. The larvae are economically important as feed for livestock and in traditional Chinese medicine. Identification of adults is straightforward, but larvae and fragments of adults are difficult to identify. We collected C. megacephala, its allies Chrysomya pinguis and Protophormia terraenovae, as well as flies from 11 other species from 52 locations around China, then sequenced 658 base pairs of the COI barcode region from 645 flies of all 14 species, including 208 C. megacephala, as the basis of a COI barcode library for flies in China. While C. megacephala and its closest relative C. pinguis are closely related (mean K2P divergence of 0.022), these species are completely non-overlapping in their barcode divergences, thus demonstrating the utility of the COI barcode region for the identification of C. megacephala. We combined the 208 C. megacephala sequences from China with 98 others from public databases and show that worldwide COI barcode diversity is low, with 70% of all individuals belonging to one of three haplotypes that differ by one or two substitutions from each other, reflecting recent anthropogenic dispersal from its native range in Eurasia.

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