Davao, Philippines
Davao, Philippines

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Casas P.A.S.,Mindanao State University - Iligan Institute of Technology | Sing K.-W.,Chinese Academy of Agricultural Sciences | Lee P.-S.,University Putra Malaysia | Nuneza O.M.,Mindanao State University - Iligan Institute of Technology | And 2 more authors.
Mitochondrial DNA Part A: DNA Mapping, Sequencing, and Analysis | Year: 2017

Reliable species identification provides a sounder basis for use of species in the order Odonata as biological indicators and for their conservation, an urgent concern as many species are threatened with imminent extinction. We generated 134 COI barcodes from 36 morphologically identified species of Odonata collected from Mindanao Island, representing 10 families and 19 genera. Intraspecific sequence divergences ranged from 0 to 6.7% with four species showing more than 2%, while interspecific sequence divergences ranged from 0.5 to 23.3% with seven species showing less than 2%. Consequently, no distinct gap was observed between intraspecific and interspecific DNA barcode divergences. The numerous islands of the Philippine archipelago may have facilitated rapid speciation in the Odonata and resulted in low interspecific sequence divergences among closely related groups of species. This study contributes DNA barcodes for 36 morphologically identified species of Odonata reported from Mindanao including 31 species with no previous DNA barcode records. © 2017 Informa UK Limited, trading as Taylor & Francis Group


Cayasan R.D.,Mindanao State University - Iligan Institute of Technology | Limitares D.E.,Mindanao State University - Iligan Institute of Technology | Gomid J.V.S.,Mindanao State University - Iligan Institute of Technology | Nuneza O.M.,Mindanao State University - Iligan Institute of Technology | Villanueva R.J.T.,D3C Gahol Apartment
AACL Bioflux | Year: 2013

The Odonata is important in identifying the habitat health of freshwater ecosystems. In this study, the species richness and relative abundance of Odonata were determined in 12 sampling sites in Zamboanga del Sur. Field work was conducted in August-December, 2012 using the random sampling method. Thirty-six species belonging to 10 families were documented of which 16 (44%) species are Philippine endemic. High species richness was recorded in Cabilinan Stream which is considered to be the most undisturbed site in the 12 sampling sites. Species richness was also considerably high in eight sampling sites despite habitat modification and water pollution from agricultural run-offs. The presence of Oriental species which are indicators of degraded environments suggests that the streams are disturbed. However, the presence of some endemic species indicates that these endemic fauna can thrive in disturbed habitats.


Mapi-Ot E.F.,Mindanao State University - Iligan Institute of Technology | Taotao A.U.,Mindanao State University - Iligan Institute of Technology | Nuneza O.M.,Mindanao State University - Iligan Institute of Technology | Villanueva R.J.T.,D3C Gahol Apartment
AACL Bioflux | Year: 2013

Odonata is considered an environmental indicator group of freshwater habitats. Thus there is a need to have a good baseline data to use it for monitoring fluvial habitats. However, species composition of Odonata in Misamis Occidental is poorly known. This study was conducted to determine the species diversity of Odonata in the municipality of Sinacaban and in the cities of Oroquieta and Ozamiz, Misamis Occidental, Philippines. Opportunistic sampling method using sweep nets was employed. There were 266 Odonata individuals collected comprising 22 species. Seven species (31.82%) are Philippine endemic. Low species diversity was recorded in all the sampling sites with more or less even distribution of species. Results indicate that the sampled areas are already disturbed.


Jomoc D.J.G.,Mindanao State University - Iligan Institute of Technology | Flores R.R.C.,Mindanao State University - Iligan Institute of Technology | Nuneza O.M.,Mindanao State University - Iligan Institute of Technology | Villanueva R.J.T.,D3C Gahol Apartment
AACL Bioflux | Year: 2013

Monitoring the environment through indicator species such as Odonata which has an aquatic larval stage and a terrestrial adult stage allows fast and easy means of evaluating habitat quality. This study aims to examine the species richness of Odonata in nine wetland areas of Bukidnon and Cagayan de Oro City. A survey using random sampling method was conducted from October to December 2012. Thirty-eight species were recorded under 28 genera and 12 families. Nineteen species are endemic. Species richness of the Odonata in relatively undisturbed areas ranges from 17-20 species. A lower species richness of 6-12 species was recorded in urbanized and disturbed areas. A relatively rare taxa, Rhinagrion reinhardi was recorded in one of the pristine areas. Further surveys in poorly studied and undisturbed areas may result in a higher species richness of Odonata.


Villanueva R.J.T.,D3C Gahol Apartment | Van Der Ploeg J.,Leiden University | Van Weerd M.,Leiden University
Odonatologica | Year: 2011

D. hamalaineni sp. n. (holotype ♂: Dipinantahikan area, Dipagsangan, Palanan, Isabela, Luzon Island, the Philippines, 12/20-IX-2008, to be deposited in RMNH, Leiden) and S. sierramadrensis sp. n. (holotype ♂, same locality, date and deposition) are diagnosed, described and illustrated.


The Philippine genus Sangabasis Villanueva is reviewed. Eight new species are described: S. bukid sp. nov., S. bulba sp. nov., S. cahilogi sp. nov., S. carmelae sp. nov., S. feliculoi sp. nov., S. hamis sp. nov., S. janvantoli sp. nov., and S. zam-boanga sp. nov. Copyright © 2014 Magnolia Press.


The Philippine genus Sangabasis Villanueva is reviewed. Eight new species are described: S. bukid sp. nov., S. bulba sp. nov., S. cahilogi sp. nov., S. carmelae sp. nov., S. feliculoi sp. nov., S. hamis sp. nov., S. janvantoli sp. nov., and S. zamboanga sp. nov.


Villanueva R.J.T.,D3C Gahol Apartment | Schorr M.,OSTLAP
Zootaxa | Year: 2011

Drepanosticta wildermuthi spec. nov. and Sulcosticta vantoli spec. nov. are described and illustrated. The two species are compared with their nearest relatives, D. moorei van Tol & Müller and S. viticula van Tol, respectively. Drepanosticta wildermuthi spec. nov has shorter anterior lobe processes compared to D. moorei. Sulcosticta vantoli spec. nov. has a simpler paraproct structure compared to S. viticula. Copyright © 2011 - Magnolia Press.


Mining modifies the surrounding environment and causes habitat deterioration along river systems receiving mine tailings. Here it is assessed whether chromium ore mining affects the odon. abundance and diversity. Line transect surveys were conducted during 4 months at the Henry river (along a pristine section and a previously mined section), and at the Lecing river, which is currently receiving tailings from chromium ore mines. The density of adult odon. was 10 times higher in the pristine than in the mined river. Species richness was reduced in both the currently and in the previously mined sections (5 spp.) as compared to that of the pristine river (12 spp.), showing a detrimental effect of chromium mining on dragonfly diversity and abundance.

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