Eubrianacinae, Boving and Craighead, 1931

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 : 269

Undescribed Eubrianacinae

Fig. 22 , Map A

Discussion. Larvae of this type were found in a variety of localities, mostly in the western half of the country. This genus differs from all other described genera by the sutural configuration on the prothorax ( Fig. 22 ) and the lack of a gap between paratergites 6 and 7. This larva is not included in the key because it might represent a new genus or an undescribed member of an existing genus not known from Thailand.

Material Examined. Chiang Mai Province: creek at Chiang Dao, Wildlife Research Center , 520 m, 19°21’N 98°55’E, 26 Aug 2002 , CMU team (1L); same locality, 25 V 2002, coll. Arthit (1L). Kampaeng Phet Province: Klong Lan Natl. Park, Namtok Klong Lan, 310 masl, 16°07’N 99°16’E (1L); Mae Wong National Park , Kaeng Pa Nang Koi , gravel, 290 m, 16°02’N 99°13’E, 7 April 2003 , L-451, Sites, AV, Prommi, Setaphan (8L). Kanchanaburi Province: Amphur Sai Yok, Thong Pha Phum Forest Restoration Station, Mae Nam Noi, 204 m, 14°31’N 98°37’E, 10 April 2003 , L-462, colls: UMC & CMU teams (9L); Amphur Sangkhla Buri, Huay Song Ka Lia, gravel stream, 204 m, 15°3’N 98°26’E, L-340, UMC and CMU teams (7L); Amphur Thong Pha Phum , Huay Koeng Kra Wia , stream, 325 m, 14°55’N 98°40’E, 11 April 2002 , L- 331, UMC and CMU teams (1L); same locality, 12 May 2003 , L-527, Vitheepradit, Prommi, Ferro (7L); Amphur Thong Pha Phum , Huay Ou Long , stream, 139 m, 14°46’N 98°40’E, 11 April 2002 , L-332, UMC and CMU teams (3L); same locality, 12 May 2003 , L-525, Vitheepradit, Prommi, Ferro (1L); Huay Ou Long , opposite Koeng Ka Wia Reforestation Station , rocky stream, 326 m, 14°33.199’N 98°34.238’E, L-1300, R. W. Sites (18L); Huay Pak Kog near Yhong Pha Phum National Park , gravel stream, 206 m, 14°38’N 98°31’E, 9 April 2003 , L- 460, Sites, AV, Prommi, Setaphan (3L); Thong Pha Phum National Park , Huay Pak Kog , gravel stream, 139 m, 14°47.183’N 98°48.401’E, 1 June 2011 , L- 1303, R. W. Sites (16L) . Mae Hong Son Province: Huay Pha, < 1 km N Ban Huay Pha , 19 Apr 2009, 360 m, 19°25.847’N 97°59.827’E, Sites, Vitheepradit, Prommi, L-1049 (1L); Huay Pha , 18 km N Mae Hong Son, 340 m, 19°25’N 97°59’E, 19 March 2002 , CMU team (2L); Huai Pha , 18 km N Mae Hong Son, 340 m, 19°25’N 97°59’E, 19 March 2002 , L-306, Sites, Vitheepradit, Kirawanich (3L); Amphur Khum Yaum, Tumbon Khun Yaum, Huay Ma Surin at Ban Mae Surin, 20 Apr 2009, 408 m, 18°54.588’N 97°56.695’E, Sites, Vitheepradit, Prommi, L-1050 (11L). Nakon Si Thamarat Province: Nopphitam, Tumbon Krung ChingKlong Pod , stream, 130 m, 08°48’N 99°35’E, L-571, Vitheepradit & Ferro (1L) . Nan Province: Amphur Bo Kluea, Ban Bo Kluea Tai, Nam Mang , 663 m, 19°09’N 101°09’E, 22 Apr 2003 , L-476, Vitheepradit, Prommi, Setaphan (7L); Amphur Bo Kluea, Ban Bo Kluea Tai, Nam Mang, 17 Apr 2009, 663 m, 19°09.141’N 101°09.277’E, L-1044, S ites, Vitheepradit, Prommi (10L). Phayao Province: Heuy Chom Poo Wildlife Sanctuary Station, Heut Chom Poo Falls , gravel, 526 m, 19°10’N 100°06’E, L-468, Vitheepradit, Prommi, Setaphan (2L) . Phrae Province: stream from Cheung Thong Waterfall , gravel, 259 m, 18°03.020’N 100°14.927’E, 14 May 2004 , L- 688, Vitheepradit & Prommi (2L). Suratthani Province: Amphur Ban Na San, Ban Plai, Nam , 168 m, 08°52.680’N 99°28.621’E, 17 June 2004 , L-775, Sites, Vitheepradit, Prommi (2L). Tak Province: Amphur Tha Song Yang, stream, 4 km NW of Amphur Mae Ramat , 21 April 2009, 226 m, 17°03.834’N 98°26.632’E, L-1057, Sites, Vitheepradit, Prommi (1L).

Figures

Figs. 21–24. Morphological structures. 21) Dicranopselaphus: Prothoracic paratergites extending from middle of lateral margins (from Lee et al. 2007); 22) Undescribed Eubrianacinae: Unique pronotal suture (yellow arrow) configuration; 23) Schinostethus: Pupa; 24) Psephenoidinae: Pupa.