Coptotermes formosanus Shiraki, 1909 台湾乳白蚁

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1. Phylogeography of Coptotermes gestroi and Coptotermes formosanus (Isoptera: Rhinotermitidae) in Taiwan

   Hou‐Feng Li, Weimin Ye, Nan‐Yao Su, Natsumi Kanzaki · 2009 · Annals of the Entomological Society of America

   Resumen

   Abstract The Formosan subterranean termite, Coptotermes formosanus Shiraki (Isoptera: Rhinotermitidae), is primarily reported from subtropical and warm temperate regions, whereas Coptotermes gestroi (Wasmann) is reported from many areas of the tropics. Taiwan is one of a few areas where the distributions of the two species overlap. By analyzing partial mitochondrial sequences of COII, 12S rRNA, and 16S rRNA, we found that most Taiwanese C. formosanus populations were closely related to Japanese and some Chinese populations and that Taiwanese C. gestroi populations were most closely related to those from the Philippines and Hawaii rather than populations from Thailand, Malaysia, Singapore, and Indonesia. The intraspecific variation of C. formosanus was 0.7–0.8% for three genes among seven Taiwanese populations, whereas all Taiwanese C. gestroi populations had identical sequences. The results support that Taiwan may be a center of origin for C. formosanus, but a recent introduction site for C. gestroi.

2. Genetic Relationship Between Coptotermes gestroi and Coptotermes vastator (Isoptera: Rhinotermitidae)

   Beng-Keok Yeap, Ahmad Sofiman Othman, Vannajan Sanghiran Lee, Chow‐Yang Lee · 2007 · Journal of Economic Entomology

   Resumen

   The phylogenetic relationship of Coptotermes gestroi (Wasmann) and Coptotermes vastator Light (Isoptera: Rhinotermitidae) was determined using DNA sequence comparisons of mitochondrial genes. Partial sequences of the ribosomal RNA small subunit 12S, ribosomal RNA large subunit 16S, and mitochondrial COII were obtained from nine populations of C. gestroi from South East Asia (Malaysia, Singapore, Thailand, and Indonesia) and four populations of C. vastator from the Philippines and Hawaii. In addition, four populations of Coptotermes formosanus Shiraki and Globitermes sulphureus (Haviland) were used as the outgroups. Consensus sequences were obtained and aligned. C. vastator and C. gestroi are synonymous, based on high sequence homology across the 12S, 16S, and COII genes. The interspecific pairwise sequence divergence, based on Kimura 2-parameter model between C. gestroi and C. vastator, varied only up to 0.80%. Morphometric measurements of 16 characteristics revealed numerous overlaps between the examined individuals of both species. Based on the molecular phylogenetics and morphometric data, it is proposed that C. vastator is a junior synonym of C. gestroi.

3. Tunneling activity, wood consumption and survivorship of Coptotermes gestroi, Coptotermes curvignathus and Coptotermes kalshoveni (Isoptera: Rhinotermitidae) in the laboratory

   Boon‐Hoi Yeoh, Chow‐Yang Lee · 2007 · Sociobiology

   Resumen

   The tunneling activity, wood consumption and survivorship of three species of subterranean termites, Coptotermes gestroi (Wasmann), C. curvignathus Holmgren and C. kalshoveni Kemner were compared in the laboratory using two methods: petri dish and glass jar methods. The petri dish method consisted of a 15-cm petri dish containing 5% agar and 4 rubber wood blocks placed at positions of 0, 90, 180 and 270°. The second method consisted of a glass jar containing 200 g sand moistened with 40 ml distilled water and a piece each of rubber and pine wood on the top of the sand surface. Termites were released into the dish and jar, and allowed to tunnel freely for 28 days. At the end of the experiment, the tunneling activity was semi-quantitatively ranked, the set-up was dissembled, and termite survivorship and wood consumption rate were determined. Results suggested that C. curvignathus has the most active tunneling activity, followed by C. gestroi. On the other hand, C. kalshoveni has the least tunneling activity, but highest wood consumption rate, possibly showing a higher resource fidelity. The survivorship of the termites was >75% after the 28-day experimental period.

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