1,721,060 research outputs found
Three new species of Simulium (Nevermannia) (Diptera: Simuliidae) from Vietnam
No full textTakaoka, Hiroyuki, Sofian-Azirun, Mohd, Ya'Cob, Zubaidah, Chen, Chee Dhang, Lau, Koon Weng, Pham, Xuan Da (2014): Three new species of Simulium (Nevermannia) (Diptera: Simuliidae) from Vietnam. Zootaxa 3866 (4): 555-571, DOI: 10.11646/zootaxa.3866.4.
Studies on forensically important entomological specimens recovered from monkey carrion exposed to different ecological habitats / Chen Chee Dhang
Full text linkLittle information was available on the forensically important specimens collected from carcasses in indoor and different ecological habitats in Malaysia. This study was attempted to determine the arthropod succession on carcasses (1) placed in different ecological habitats, such as lowland forested area, coastal area and montane forested area; (2) placed in indoor and outdoor conditions; and (3) carcasses being incinerated, submerged in freshwater river, and treated with insecticide and its effect on post mortem interval (PMI) estimation.
Carcasses placed outdoor and indoor underwent 5 decomposition stages namely, fresh, bloating, decay, advanced decay and remains/dry. Decomposition duration on carcasses placed in indoor was prolonged, in comparison to outdoor in lowland forested and coastal areas by 1.67 to 2.73 folds, but not in montane forested area.
There were no activity and oviposition of forensically important flies during nocturnal period. Flies activity were observed to be active from about 30 minutes after sunrise throughout the day until 10 minutes after sunset.
There was no delay on flies oviposition on carcasses placed outdoor in all ecological habitats. However, there was at least a 1 day delay on PMI estimation on carcasses placed indoor in coastal area. It is interesting to note that there was a 3 days delay in PMI estimation on carcasses placed indoor in both lowland and montane forested areas. This study revealed the time required for blow flies to perceive the body and enter indoor to oviposit in three different ecological habitats. Our results established the time required to be added to estimate larval age to approach a realistic PMI estimation in this region.
Oviposition of flies on carcasses, besides being used for PMI estimation, can also serve as geographical indicator: (1) Lucilia porphyrina was exclusively found in montane forested area; (2) Chrysomya nigripes was a strictly outdoor species and only invaded carcasses in lowland forested area; and (3) Chrysomya chani was only found invading carcasses placed in outdoor and indoor in lowland forested area.
Study conducted on incinerated carcasses emphasizes that: (1) incineration effect does not deter the arrival and oviposition of flies; (2) incineration effect does not make any difference in the fauna succession pattern between incinerated and non-incinerated carcasses, with succession sequence from Calliphoridae, Sarcophagidae and Muscidae; and (3) decomposition rates on incinerated carcasses were faster than non-incinerated carcasses.
Study conducted on carcasses submerged in freshwater river emphasizes that: (1) PMI estimation on carcasses submerged in freshwater river was delayed by a minimum period of 2 days; (2) there was no difference in the fauna succession pattern between carcasses submerged in freshwater river and placed outdoor, with the succession sequence from Calliphoridae, Sarcophagidae and Muscidae; (3) Chrysomya megacephala was the dominant adult flies observed visiting the carcasses, but only Ch. pinguis and Hemipyrelia spp. were found to be dominant maggots colonizing the carcasses; and (4) decomposition rates of carcasses submerged in freshwater river were slower than carcasses placed outdoor.
Study conducted on carcasses treated with insecticide concluded that malathion repelled and delayed the insect invasions of the carcasses, especially flies for at least 7 days.
Ants (Order: Hymenoptera) were reported occurring in all decomposition stages, and were not significant indicator for carcasses succession or PMI estimation. Beetles (Order: Coleoptera) were observed visiting the monkey carcasses in lowland and montane forested areas, and their succession on different decomposition stages were determined. No beetles were observed visiting carcasses placed in coastal area. More species of beetles were found in indoor than outdoor. Ants and beetles were found on carcasses strictly specific in certain geographical regions, indicating that they can serve as an evidence in forensic cases occurred in similar ecological habitats
Revision of the Simulium (Simulium) melanopus species-group (Diptera: Simuliidae) in Sabah, Malaysia
No full textTakaoka, Hiroyuki, Sofian-Azirun, Mohd, Ya'Cob, Zubaidah, Chen, Chee Dhang, Lau, Koon Weng, Fernandez, Kevin, Lardizabal, Maria Lourdes (2015): Revision of the Simulium (Simulium) melanopus species-group (Diptera: Simuliidae) in Sabah, Malaysia. Zootaxa 3985 (1): 1-30, DOI: 10.11646/zootaxa.3985.1.
A new black fly species of Simulium (Gomphostilbia) (Diptera: Simuliidae) from Sulawesi, Indonesia
No full textTakaoka, Hiroyuki, Sofian-Azirun, Mohd, Chen, Chee Dhang, Halim, Muhammad Rasul Abdullah, Lau, Koon Weng, Low, Van Lun, Suana, I. Wayan (2019): A new black fly species of Simulium (Gomphostilbia) (Diptera: Simuliidae) from Sulawesi, Indonesia. Zootaxa 4651 (2): 392-400, DOI: 10.11646/zootaxa.4651.2.1
Simulium (Nevermannia) phami Takaoka, Sofian-Azirun
No full textSimulium (Nevermannia) phami Takaoka, Sofian-Azirun & Ya’cob, 2014 Simulium (Nevermannia) phami Takaoka, Sofian-Azirun & Ya’cob, 2014 d: 563–566. (Female, male, pupa and larva). Distribution. Vietnam. Remarks. This species was described from Lam Dong Province, southern Vietnam (Takaoka et al. 2014 d). It is characterized by the pupal gill with five filaments.Published as part of Takaoka, Hiroyuki, Sofian-Azirun, Mohd, Ya'Cob, Zubaidah, Chen, Chee Dhang, Lau, Koon Weng & Pham, Xuan Da, 2015, The black flies (Diptera: Simuliidae) from Thua Thien Hue and Lam Dong Provinces, Vietnam, pp. 1-96 in Zootaxa 3961 (1) on page 58, DOI: 10.11646/zootaxa.3961.1.1, http://zenodo.org/record/28857
FIGURE 6 in Three new species of Simulium (Nevermannia) (Diptera: Simuliidae) from Vietnam
No full textFIGURE 6. Female and male of Simulium (Nevermannia) bachmaense sp. nov. A–C, female; D & E, male. A, third segment of maxillary palpal segment with sensory vesicle (right side; front view); B, genital fork (ventral view); C, spermatheca; D, third segment of maxillary palpal segment with sensory vesicle (right side; front view); E, ventral plate (ventral view). Scale bars. 0.02 mm for A–E.Published as part of Takaoka, Hiroyuki, Sofian-Azirun, Mohd, Ya'Cob, Zubaidah, Chen, Chee Dhang, Lau, Koon Weng & Pham, Xuan Da, 2014, Three new species of Simulium (Nevermannia) (Diptera: Simuliidae) from Vietnam, pp. 555-571 in Zootaxa 3866 (4) on page 567, DOI: 10.11646/zootaxa.3866.4.6, http://zenodo.org/record/22867
FIGURE 6 in New species and records of black flies (Diptera: Simuliidae) from Vinh Phuc Province, Vietnam
No full textFIGURE 6. Mature larva of S. (S.) taythienense sp. nov. A, protuberance and minute colorless setae on abdominal segment 4; B, mandible; C, hypostoma; D, ventral surface of head capsule showing postgenal cleft and pigmented subesophageal ganglion. Scale bars = 0.1 mm for D, 0.05 mm for C, and 0.02 mm for A & B.Published as part of Takaoka, Hiroyuki, Sofian-Azirun, Mohd, Ya'Cob, Zubaidah, Chen, Chee Dhang, Lau, Koon Weng & Pham, Hong Thai, 2014, New species and records of black flies (Diptera: Simuliidae) from Vinh Phuc Province, Vietnam, pp. 347-366 in Zootaxa 3838 (3) on page 360, DOI: 10.11646/zootaxa.3838.3.6, http://zenodo.org/record/510982
FIGURE 4 in New species and records of black flies (Diptera: Simuliidae) from Vinh Phuc Province, Vietnam
No full textFIGURE 4. Male of S. (S.) taythienense sp. nov. A, third segment of right maxillary palp with sensory vesicle (front view); B, basitarsus with calcipala and second tarsomere with pedisulcus of left hind leg (outer view); C, coxites, styles, ventral plate and median sclerite (ventral view); D, right coxite and style (ventrolateral view); E & F, right styles (E, medial view; F, dorsolateral view); G & H, ventral plates (G, lateral view; H, caudal view); I, left paramere and aedeagal membrane (caudal view); J & K, tenth abdominal segments and cerci (right side; J, lateral view; K, caudal view). Scale bars = 0.1 mm for B, and 0.02 mm for A & C–K.Published as part of Takaoka, Hiroyuki, Sofian-Azirun, Mohd, Ya'Cob, Zubaidah, Chen, Chee Dhang, Lau, Koon Weng & Pham, Hong Thai, 2014, New species and records of black flies (Diptera: Simuliidae) from Vinh Phuc Province, Vietnam, pp. 347-366 in Zootaxa 3838 (3) on page 357, DOI: 10.11646/zootaxa.3838.3.6, http://zenodo.org/record/510982
Simulium (Gomphostilbia) tamdaoense Takaoka, Sofian-Azirun
No full textSimulium (Gomphostilbia) tamdaoense Takaoka, Sofian-Azirun & Ya’cob, 2014 Simulium (Gomphostilbia) tamdaoense Takaoka, Sofian-Azirun & Ya’cob (in Takaoka et al., 2014a): 351–353 (Male and pupa). Distribution. Vietnam (Vinh Phuc). Remarks. This species was described from Vinh Phuc Province in northern Vietnam (Takaoka et al. 2014a). The female and larva of this species remain to be collected.Published as part of Takaoka, Hiroyuki, Sofian-Azirun, Mohd, Ya'Cob, Zubaidah, Chen, Chee Dhang, Lau, Koon Weng, Low, Van Lun, Pham, Xuan Da & Adler, Peter H., 2017, The black flies (Diptera: Simuliidae) of Vietnam, pp. 1-165 in Zootaxa 4261 (1) on page 42, DOI: 10.5281/zenodo.57160
Simulium (Gomphostilbia) fuscidorsum Takaoka
No full textSimulium (Gomphostilbia) fuscidorsum Takaoka & Ya’cob, 2015 Simulium (Gomphostilbia) fuscidorsum Takaoka & Ya’cob (in Takaoka et al., 2015a): 13–17 (Female, pupa and larva). Distribution. Vietnam (Lam Dong). Remark. This species was described from Lam Dong Province in southern Vietnam (Takaoka et al. 2015a).Published as part of Takaoka, Hiroyuki, Sofian-Azirun, Mohd, Ya'Cob, Zubaidah, Chen, Chee Dhang, Lau, Koon Weng, Low, Van Lun, Pham, Xuan Da & Adler, Peter H., 2017, The black flies (Diptera: Simuliidae) of Vietnam, pp. 1-165 in Zootaxa 4261 (1) on page 26, DOI: 10.5281/zenodo.57160
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