Mataeopsephus Waterhouse, 1876

Shepard, William D. & Sites, Robert W., 2019, Larval Psephenidae (Coleoptera: Byrrhoidea) of Thailand: Annotated List and Illustrated Key to Genera, The Coleopterists Bulletin 73 (2), pp. 259-282 : 273

Mataeopsephus Waterhouse, 1876 Fig. 14 , Map E

Discussion. Mataeopsephus ( Fig. 37 ) was treated by Lee and Jäch (1995) and Lee et al. (2003). It contains 12 species distributed in India, Russia, China, Taiwan, Korea, Japan, and Vietnam. Larvae of many species have been described. Adults of some species have been collected at lights. Our new country records are from northern Thailand.

Material Examined. Chiang Rai Province: Stream from Nomtok Khun Kon , 524 m, 19°51’N 99°39’E, Vitheepradit, Prommi, Setaphan (1L) . Nan Province: Amphur Bo Kluea, Ban Bo Kluea Tai, Nam Mang , gravel, 663 m, 19°09’N 101°09’E, 22 April 2003, L-476, AV, Prommi, Setaphan (1L); same locality, 17 April 2009, L-1044, Sites, Vitheepradit and Prommi (4L) . Phayao Province: Amphur Ciang Kham Ban Korg, Nam Mae Lao , 521 m, 19°24’N 100°24’E, L-470, AV, Prommi, Setaphan (5L) . Tak Province: Amphur Tha Song Yang , stream, 27.3 km NW of Tha Song Yang on Hwy 105, 17°34.367’N 97°57.192’E, Sites, Vitheepradit and Prommi, L-1054 (1L) .

Figures

Figs. 10–14. Morphological structures. 10) Schinostethus: Gills concealed beneath ventral operculum; 11) Undescribed Eubrianacinae: Palmate gills exposed on venter; 12) Psephenoidinae: Ninth abdominal segment surrounded by paratergites of eighth abdominal segment; 13) Schinostethus: Ninth abdominal segment not surrounded by paratergites of eighth abdominal segment; 14) Mataeopsephus: Gills with branches arising from central stalk. 7 = seventh abdominal segment; 8 = eighth abdominal segment; 9 = ninth abdominal segment.

Figs. 37–40. Psepheninae and Psephenoidinae genera, dorsal habitus. 37) Mataeopsephus; 38) Sinopsephenoides;