Browsing by Author "Dangalle, C"

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Open Access
New record of Tricondyla gounellii Horn 1900 (Coleoptera, Cicindelinae), an arboreal tiger beetle from Sri Lanka
(: https://www.researchgate.net/publication/336107511, 2019-09) Abeywardhana, L; Dangalle, C; Mallawarachchi, Y
Arboreal tiger beetles belong to tribe Collyridini of order Coleoptera, family Carabidae, subfamily Cicindelinae and can be found predominantly in the tropical and subtropical regions of Asian countries mainly in forest habitat types (Toki et al., 2017). Tribe Collyridini is divided in to five genera - Collyris, Neocollyris, Protocollyris, Derocrania and Tricondyla. According to records provided by Fowler (1912) from his studies in the Fauna of British India’ five species of genus Tricondyla reside in Sri Lanka - Tricondyla femorata , Tricondyla tumidula , Tricondyla coriacea , Tricondyla nigripalpis , Tricondyla granulifera ). Three of these species, T. coriacea, T. nigripalpis, T. granulifera are endemic to the country, while the other two species also reside in India. However, the sources of this information is far outdated and unreliable and requires current investigations and revision. Thus, the present study was conducted to investigate the current species of arboreal tiger beetles of Sri Lanka, their morphology, locations, habitats and habitat preferences.
Embargo
An ultra-specific image dataset for automated insect identification
(Springer Nature, 2022-01) Abeywardhana, L; Dangalle, C; Nugaliyadde, A; Mallawarachchi, Y
Automated identifcation of insects is a tough task where many challenges like data limitation, imbalanced data count, and background noise needs to be overcome for better performance. This paper describes such an image dataset which consists of a limited, imbalanced number of images regarding six genera of subfamily Cicindelinae (tiger beetles) of order Coleoptera. The diversity of image collection is at a high level as the images were taken from diferent sources, angles and on diferent scales. Thus, the salient regions of the images have a large variation. Therefore, one of the main intentions in this process was to get an idea about the image dataset while comparing diferent unique patterns and features in images. The dataset was evaluated on diferent classifcation algorithms including deep learning models based on diferent approaches to provide a benchmark. The dynamic nature of the dataset poses a challenge to the image classifcation algorithms. However transfer learning models using softmax classifer performed well on the current dataset. The tiger beetle classifcation can be challenging even to a trained human eye, therefore, this dataset opens a new avenue for the classifcation algorithms to develop, to identify features which human eyes have not identifed.