Agelosus auricomus Smetana & Hu, 2019

Hu, Fang-Shuo, 2020, New distributional records of Staphylinina in Taiwan, including a new species of Miobdelus Sharp (Coleoptera: Staphylinidae: Staphylininae: Staphylinini), Zootaxa 4768 (3), pp. 334-360 : 336-337

Agelosus auricomus Smetana & Hu, 2019

( Figs. 3 , 50 )

Material examined. TAIWAN: New Taipei City: 1 female, Guishan (ƟƜ), Wulai Dist. , 24.9021, 121.5510, ca. 80m, 13-IV-2012, leg. L. C. Shih (FSHc) . Nantou County: 1 spec., CCCC , Shihmenshan (ƂḋƜ), 03.III.2019. leg. S.-P. Wu ( TARI) . Yilan County: 1 male, Fushan Botanical Garden ( AEƜḆṄṞ), Yunnan To., 26-II-2020, leg. S. S. Lu (FSHc) .

Diagnosis. Agelosus auricomus is the only species of the genus in Taiwan. It can be distinguished from most Staphylinina in Taiwan by the mandibles each with a subdental indentation. However, this character convergently evolved in the genus Nelmanwaslus Smetana, 2006 . So far, only N. ornatus Smetana, 2006 has been found in Taiwan and is newly reported in this paper. Agelosus auricomus can be easily distinguished from N. ornatus by the patches of golden-yellow tomentose pubescence on the elytra ( Fig. 3 ).

Bionomics. Based on an import of locality name into Google Earth from collection data ( Smetana & Hu 2019), Ag. auricomus occurs from 20– 800 m. Apparently, the species only occurs in the lowlands or low mountains. The specimen from Guishan was collected from the foot of a mountain near Nanshi River (ĦBữ). Smetana & Hu (2019) reported a specimen that was collected from under a stone in a valley in mixed wood forest.

Distribution. Agelosus auricomus is at present known from Taiwan, including Nantou County, New Taipei City, Taipei City and Yilan County ( Smetana & Hu 2019 and this study). The additional specimen from Nantou indicates that this species is perhaps widespread in Taiwan.

Apecholinus fraternus Fairmaire, 1891

( Fig. 4 )

Material examined. TAIWAN: Hsinchu County: 1 spec., Talutrail (±ẘIJǎ), 01.VIII.2015, leg. Y.-L. Lin ( TARI) . Nantou County: 1 male, Meifeng (đø), Renai To., 05-VI-2019, leg. W. Z. Wang (FSHc).

Diagnosis. Apecholinus fraternus can be distinguished from all other species of Apecholinus in Taiwan by the lack of golden-yellow or grey tomentose pubescence on the body.

Bionomics. Based on an import of locality name into Google Earth from collection data ( Hayashi 1978, Smetana 2018, Smetana & Hu 2019), Ap. fraternus occurs from 1400–2600 m in Taiwan. Some specimens of this species were collected by pitfall traps, but nothing known about the habitat the traps were set in ( Smetana 2018, Smetana & Hu 2019). Smetana & Hu (2019) reported a specimen collected from under a rock near a creek.

Distribution. Apecholinus fraternus is widespread in mainland China including Guangxi, Guizhou, Henan, Hubei, Hunan, Shaanxi, Sichuan and Yunnan. The species also widespread in Taiwan including Chiayi County, Hsinchu County, Hualien County, Nantou County and Taichung City ( Smetana 2018, Smetana & Hu 2019). The specimen from Hsinchu represents the first specimen from northern Taiwan.

Remarks. The name ‘ Agelosus fraternus ’ in the ‘Geographical distribution’ section of Ap. fraternus in Smetana & Hu (2019) should be corrected to ‘ Apecholinus fraternus ’.

Figures

FIGURES 1–7. 1. Creophilus flavipennis: female. 2. Creophilus maxillosus maxillosus: male. 3. Agelosus auricomus: male. 4.

FIGURES 50–53. Live specimens of Staphylinina in Taiwan: 50. Agelosus auricomus (Photo by J.-M. Chen); 51. Miobdelus humilis sp. nov., paratype (Photo by K.-W. Chan); 52. Sphaerobulbus miwai comb. nov.; 53. Thoracostrongylus formosanus.