Microdytes schwendingeri Wewalka, 1997

Okada, Ryohei, Jaitrong, Weeyawat & Wewalka, Guenther, 2023, A review of Microdytes J. Balfour-Browne, 1946 from Thailand, Laos, and Cambodia with descriptions of five new species and new records (Coleoptera, Dytiscidae), ZooKeys 1159, pp. 87-119 : 87

Microdytes schwendingeri Wewalka, 1997

Figs 34 , 40B

Microdytes schwendingeri Wewalka, 1997: 36; Wewalka 2011: 37; Nilsson and Hájek 2023: 212.

Type locality.

Thailand, Sakon Nakhon Province, Phu Pan NP.

Material examined.

Thailand: Nakhon Phanom Province. 1♂, 1♀, Bang Phaeng District, Phai Lom St. 203 (alt. 200 m), 27.XII.2020, R. Okada leg. (CRO, THNHM) (Fig. 34 ) .

Laos: Savannakhet Province, 1♀, Phou Xang He NBCA, ca. 5 km SW Ban Pa Phaknau, 17°00'N, 105°38'E, alt. 250-400 m, 31.V.-6.VI. 2011, NHMB Basel , Laos 2011 Expedition, M. Brancucci, M. Geiser, D. Hauk, Z. Kraus, A. Phantala & E. Vongphachan leg. (NMB); Champasak Province. 2♂♂, 1♀, Bolavens Plateau , waterfall ca. 2 km E Tad Katamtok, 15°08.1'N, 106°38.8'E, alt. 415 m, 10.-12.V.2010, J. Hájek leg. (CGW, NMP) .

Comments.

Some specimens from Laos have less distinct elytral markings but no other differences from typical specimens have been observed.

Distribution.

Thailand: Nakhon Phanom (first record) and Sakon Nakhon provinces; Laos (first record): Savannakhet and Champasak provinces.

Figures

Figures 18 - 37. Habitus of 18 Microdytes akitai 19 M. balkei 20 M. dimorphus 21 M. feryi (paratype, from Myanmar) 22 M. franzi 23 M. gabrielae 24 M. heineri 25 M. maculatus 26 M. mariannae 27 M. menopausis 28 M. paoloi 29 M. pasiricus 30 M. pederzanii 31 M. rocchii 32 M. schoedli 33 M. schoenmanni (from Myanmar) 34 M. schwendingeri 35 M. shepardi 36 M. shunichii 37 M. zetteli. Scale bar: 1.0 mm.

Figures 38 - 40. Diagnostic characters of Microdytes species. 38 Impression of lateral side (M. maximiliani sp. nov.) 39 ventral surface A with setae (M. heineri) B with very coarse punctures (M. schoedli) C with coarse punctures (M. maculatus) D with fine punctures (M. balkei) E with very fine punctures (M. jeenthongi sp. nov.) 40 clypeus bead A not bordered (M. ubonensis sp. nov.) B finely bordered (M. schwendingeri) C produced (M. dimorphus).