Classification of forensically-relevant larvae according to instar in a closely related species of carrion beetles (Coleoptera: Silphidae: Silphinae)
| Autor: | Szymon Matuszewski, Katarzyna Frątczak |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
0106 biological sciences
Thanatophilus sinuatus Subfamily Oiceoptoma thoracicum Zoology Biology 01 natural sciences Silphidae Pathology and Forensic Medicine 03 medical and health sciences 0302 clinical medicine Technical Report Animals Carrion 030216 legal & forensic medicine Forensic entomology Necrodes littoralis Larva Rugosus Forensic Sciences Discriminant Analysis General Medicine Anatomy Feeding Behavior biology.organism_classification Silphinae Coleoptera 010602 entomology Instar determination Postmortem Changes Instar Thanatophilus rugosus Entomology |
| Zdroj: | Forensic Science, Medicine, and Pathology |
| ISSN: | 1556-2891 1547-769X |
| Popis: | Carrion beetle larvae of Necrodes littoralis (Linnaeus, 1758), Oiceoptoma thoracicum (Linnaeus, 1758), Thanatophilus sinuatus (Fabricius, 1775), and Thanatophilus rugosus (Linnaeus, 1758) (Silphidae: Silphinae) were studied to test the concept that a classifier of the subfamily level may be successfully used to classify larvae according to instar. Classifiers were created and validated using a linear discriminant analysis (LDA). LDA generates classification functions which are used to calculate classification values for tested specimens. The largest value indicates the larval instar to which the specimen should be assigned. Distance between dorsal stemmata and width of the pronotum were used as classification features. The classifier correctly classified larvae of N. littoralis and O. thoracicum, whereas in the case of T. sinuatus and T. rugosus a few misclassifications were recorded. For this reason, a separate genus level classifier was created for larvae of Thanatophilus. We conclude that larval instar classifiers of the subfamily or genus level have very high classification accuracy and therefore they may be safely used to classify carrion beetle larvae according to instar in forensic practice. |
| Databáze: | OpenAIRE |
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