IDF-Report : newsletter of the International Dragonfly Fund
http://www.dragonflyfund.org/de/idf-report.html
Refine
Year of publication
- 2020 (18) (remove)
Document Type
- Part of Periodical (13)
- Article (5)
Language
- English (16)
- German (1)
- Multiple languages (1)
Has Fulltext
- yes (18)
Is part of the Bibliography
- no (18)
Keywords
- Odonata (10)
- dragonflies (5)
- damselflies (3)
- fauna (3)
- Cambodia (2)
- Odonata checklist (2)
- Peninsular Malaysia (2)
- Vietnam (2)
- new records (2)
- Amphiallagma parvum (1)
154:99-184
Phnom Kulen is a small and low plateau in the northern Cambodia still partly covered with evergreen forests and isolated from similar habitats by the Cambodian Lowland at least for 60 km. A preliminary checklist of its Odonata is provided, including 97 species. Burmagomphus sp. cf. willamsoni and Macromia callisto are for the first time reported for Cambodia.
154:29-98
Lake Tonle Sap in NW Cambodia is the largest freshwater lake in Southeast Asia and one of the most productive freshwater ecosystems in the world, so its banks are a home for ca 1,5 million people. It serves as a natural reservoir of the excess water of the Mekong River and cyclically changes its area from 2,500 km2 in May to 16,000 km2 in October. Its banks are naturally occupied by temporarily inundated forest and scrub, at present mostly replaced by rice fields. The present day semiaquatic vegetation of the lake is to a large extent formed by invasive plant species. The hitherto existing data on Odonata of the lake are very scarce. The author briefly examined the bank and floodplain at the NW part of the lake in February/March 2017, June and November 2018 and December 2019. Five main localities studied are described and illustrated
in detail. In total 41 odonate species of four families (22 in Libellulidae) were found. Most of them are common and widespread lentic species but Macrogomphus phalantus is a species hitherto known only by few specimens from swamped forests of Borneo and Sumatra; its Tonle Sap population was earlier described by the author as the subspecies M. phalantus jayavarman Kosterin, 2019. The earlier published report by Seehausen et al. (2016) of Sinictinogomphus clavatus (not found by the author) was a considerable extension of the known species’ range to the south. Six species were found in all main examined localities and ten only in one of them. At any season at the lake immediate bank (that is water front at the lowest level), Brachythemis contaminata predominates overwhelmingly, Orthetrum sabina and Crocothemis servilia are numerous, two damselfly species, Pseudagrion microcephalum and P. rubriceps, invariably occur at floating vegetation (mostly water hyacinth), and Trithemis pallidinervis, Urothemis signata, Rhyothemis phyllis, R. variegata and Tholymis tillarga are common at bushes. Agriocnemis nana, Ceriagrion praetermissum, Ischnura senegalensis, Macrogomphus phalantus, and Aethriamanta aethra were occasionally met at the lake bank. Other 26 species were found, with different occurrence and quantity, on the lake floodplain. Variation of the male occiput coloration of Amphiallagma parvum is commented.
154:1-28
Prey Long (Prey Lang) Forest is the largest remaining lowland rainforest in Indochina, shared by Stung Treng, Preah Vihear, Kampong Thom and Kratie Provinces of Cambodia, which has been persisted until present because of the lack of roads. It includes patches of unique evergreen swamp forests. Odonata of Prey Long forest, including Cheum Takong forest swamp, was briefly examined in December 2019, while the already deforested area was examined in June 2018. The former examination resulted in 40 species, the latter in 34 species, 60 species in total. Two species, Copera chantaburii Asahina, 1984 and Burmagomphus williamsoni Förster, 1914, are for the first time reported for Cambodia from the deforested area (Chey Saen District of Preah Vihear Province). The swamped forest of Cheum Takong provided 17 species, 5 of which were not found elsewhere in the considered area, 3 are rare and 4 generally Sondaic. Prey Long Forest should be re-examined in the rainy season soon after the road to Spong village is constructed.
153
The changes in coloration with age in males and females of Coeliccia mattii Phan & Kompier, 2016 from the Central Highlands of Vietnam are documented. Immature forms have extensive yellow markings on the thorax and S9 is yellowish, while in the fully mature male form, the thorax is largely black and covered in pruinosity and S9 is completely black. S9 is yellowish in the immature female while S9 is black in the fully mature female.
152
151
The paper presents new odonatological data from the formerly unstudied islands Patnanungan and Jomalig as well from the northeastern part of Polillo, The Philippines. Four species are new for the PolilloIsland group, including one new taxon Anax parthenope julius – for The Philippines. Currently, 78 odonate taxa are known from the Polillogroup.
150:3-20
A tenday collecting trip to Napo province was conducted between January 13 and 23, 2020, visiting localities where W. C. Macintyre originally collected Argia schneideri Garrison & von Ellenrieder, 2017 between 1935 and 1942, with the intention of documenting its life habits and obtaining photographs in life. A total of 65 odonate species in 36 genera were collected, including four new records for Napo province, but the target species was not found. A list of species recorded and color scans of species that have so far not been photographed are included. Color photographs and notes on the habitat of Argia schneideri are made available through the courtesy of colleagues who found it elsewhere, and its current known distribution is discussed.