Chaetarthria almorana Knisch, 1924

Jia, Fenglong, Wang, Shi-shuai & Aston, Paul, 2018, Revision of Chaetarthria Stephens (Coleoptera: Hydrophilidae) in China, with a key to the species in the Oriental Region, Journal of Natural History 52 (37 - 38), pp. 2369-2384 : 2377

Chaetarthria almorana Knisch, 1924

( Figures 3e–i and 6d )

Chaetarthria almorana Knisch, 1924: 39 (specific rank confirmed by Hebauer 1995: 7). Specimens Hebauer (1995) recorded in ISNB and NHMW were checked.

Additional material examined

YUNNAN: 5 spec . ( SYSU): ‘ Mengla, Longmen village , light trap, 5 .x . 2010, 945m, Zhou Yulingzi leg’. (transcribed from Chinese). 1 male ( SYSU): ‘ Jinghong, Banna River Reserve , Mandian (in banana grove), 20 .xi .2008, 22.13059°N 100.66817°E, L.Z. Meng leg’. (with Chinese and English labels) . 52 spec . ( SYSU): ‘ Jingdong County, Taizhong Town , 24°30´N 100°56´E, 1395m, 15 .iv .2015, Renchao Lin & Yudan Tang leg’. 2 males and 2 females ( SHNU): ‘ Mandian, Nabanhe Conv ., 12.i.2004, Li & Tang leg’. 2 spec . ( SYSU): ‘ Naban village , Nabanhe Conv. 1.i.2004, Li & Tang leg’. 4 spec . ( SYSU): ‘ Yingjiang County, Tongbiguan, Kaibangyahu , 24.58N 97.67E, 1289m, 25 .v .2016, Yudan Tang & Ruijuan Zhang leg’.

Differential diagnosis

This species is very close to C. indica d’ Orchymont. It can be distinguished from C. indica by labrum basally darkened and testaceous apically, median lobe of aedeagus attenuated and very deeply emarginated apically, flanked by heavily chitinised endosclerites partly overlapping the lobe, without a flagellum arising out of the middle of anterior margin ( Figure 6d ). But the shape of the aedeagus is the ‘only certain distinguishing character’ ( Hebauer 1995: 8).

Distribution

Widely distributed from south-eastern Asia through Vietnam to India ( Hansen 1999) and China. First record for China ( Figure 7 ).

Figures

Figure 3. Chaetarthria sp. (a–b) Habitus (a) lateral; (b) ventral; (c) apical portion of elytra; (d) head and prosternum, ventral. Chaetarthria almorana Knisch. (e–f,h) Habitus: (e) dorsal; (f) lateral; (h) ventral; (g) pronotum, left; (i) elytra.

Figure 6. Aedeagi. (a–b) Chaetarthria saundersi d’Orchymont: (a) from Hong Kong; (b) from Jiangxi. (c) Chaetarthria kuiyanae sp. nov; (d) Chaetarthria almorana Knisch; (e) Chaetarthria malickyi Hebauer; (f–h) Chaetarthria indica d’Orchymont: (f) from Jinggangshan, Jiangxi; (g) from Hong Kong; (h) from Jinggangshan, Jingxi.

Figure 7. Distribution of Chaetarthria species in China.