ABSTRACT
The records of genus Sympetrum Newman, 1833 from Thailand were analysed. The unidentified Sympetrum sp. reported from Chiang Mai and Loei provinces in the past is confirmed as S. hypomelas (Selys, 1884) and additional provincial records of this species are also provided. Sympetrum thailandensis sp. nov. is described and figured based on the adult specimens of both sexes from Hin Tung, Muang, Nakhon Nayok province, Central Thailand. The new species belongs to infuscatum-group and is most similar to S. darwinianum (Selys, 1883). However, it is different from the congener by a combination of morphological and colouration characters. The key to species of Sympetrum known from Thailand is also presented.
ABSTRACT
The larval characters of the genus Indocnemis Laidlaw, 1917 are described based on larval specimens of I. orang (Frster in Laidlaw, 1907) from Thailand. The larvae are characterized by 56 pairs of premental setae, 89 palpal setae of the same length, and vertical lamella caudal gills. The habitats and new provincial records of I. orang in Thailand are also provided in addition to a key to the genera of the family Platycnemididae in Asia.
Subject(s)
Odonata , Animals , Ecosystem , Larva , ThailandABSTRACT
Macromia siamensis sp. nov., is described and illustrated based on male specimens collected from Ban Luang, Chom Thong, Chiang Mai province, Thailand. Macromia siamensis sp. nov. shares the hammer-shaped tip of posterior hamulus with M. amphigena Selys, 1871, M. sombui Vick, 1988, M. cydippe Laidlaw, 1922, M. vangviengensis Yokoi et Mitamura, 2002, M. clio Ris, 1916, M. malleifera Lieftinck, 1955, and M. macula Zhou, Wang, Shuai Liu, 1994, but it differs from all of the mentioned species by a set of coloration characters including antehumeral stripe, abdominal pattern and facial markings.
Subject(s)
Dipterocarpaceae , Odonata , Animals , Male , ThailandABSTRACT
A modified and expanded definition of the Drepanosticta carmichaeli-group is given. This includes the species: D. annandalei Fraser, 1924, D. brownelli Tinkham, 1938, D. carmichaeli (Laidlaw, 1915), D. emtrai Dow, Kompier Phan, 2018, D. hongkongensis Wilson, 1997, D. jurzitzai Hmlinen, 1999, D. sumatrana Sasamoto Karube, 2007, D. tenella Lieftinck, 1935, D. vietnamica Asahina, 1997 and D. wildermuthi sp. nov.). The species of the group are reviewed and in most cases illustrated, diagnostic notes are given wherever possible. Drepanosticta polychromatica Fraser, 1931 is considered to be a junior synonym of D. carmichaeli and variation in D. carmichaeli is discussed. Drepanosticta wildermuthi sp. nov. from the Central Highlands of Vietnam (holotype male from Bao Loc district, Lam Dong Province) is described. The female of D. jurzitzai Hmlinen, 1999 is described for the first time. A key to the males of the Drepanosticta carmichaeli-group is provided.
Subject(s)
Odonata , Animals , Female , Male , VietnamABSTRACT
Lyriothemis pallidistigma sp. nov. (holotype male: Cat Tien National Park, Dong Nai Prov., southern Vietnam) is described. This species is reminiscent of L. defonsekai van der Poorten, 2009 and L. elegantissima Selys, 1883, but can be separated by the shape of its secondary genitalia and its patterning. Information on its biology and ecology is provided.
Subject(s)
Odonata , Animals , Male , Parks, Recreational , Thailand , VietnamABSTRACT
The new gomphid species, Microgomphus farrelli sp. nov., is described and illustrated on the basis of male and female adult specimens and larvae collected from Chiang Mai and Mae Hong Son province, Northern Thailand. It is compared with other species of the genus. Based on the larvae this species is most closely related to Microgomphus svihleri (Asahina, 1970), comb. nov., which is the senior and valid synonym of Microgomphus thailandicus Asahina, 1981, syn. nov.
Subject(s)
Odonata , Animals , Body Size , Female , Larva , Male , ThailandABSTRACT
Burmagomphus chiangmaiensis sp. nov. (holotype: Ban Luang, Chom Thong, Chiang Mai province, Thailand, 890-900 m, 14 v 2012) is described and illustrated. It can be differentiated from its most similar congener, B. apricus from China, by shape of posterior hamulus, yellow trapezoid band on occiput, and larger size.
