Pteroloma Gyllenhal, 1827

Růžička, Jan & Pütz, Andreas, 2009, New species and new records of Agyrtidae (Coleoptera) from China, India, Myanmar, Thailand and Vietnam, Acta Entomologica Musei Nationalis Pragae 49 (2), pp. 631-650 : 649

Key for species of Pteroloma Gyllenhal, 1827 of China and adjacent countries

The key is modified from LAFER (2002).

1 Elytra almost round (1.2 times as long as wide), with very wide epipleural keel ( RŮŽIČKA & SCHNEIDER 1995: 113, Fig. 1 ) ( Russia: Primorye region: south of Sikhote Alin mts). ... ......................................................................... P. plutenkoi ( Růžička & Schneider, 1995)

– Elytra more oval (1.35–1.50 times as long as wide), with narrow epipleural keel ( LAFER 2002: 52, Fig. 1 ). ............................................................................................................. 2

2 Body yellowish (becoming light brown in dead specimens); antenna distinctly bicolorous, with antennomeres 1, 2 and 11 yellow and the others black ( LAFER 2002: 52, Fig. 1 ); legs bicolorous, yellow with black tibia and apical part of femora; lateral margin of elytra serrate to three fourths of its length; aedeagus regularly rounded toward apex in lateral view, paramera short, not exceeding half of the length of median lobe ( LAFER 2002: 53, Fig. 2C ); apex of aedeagus wide, quadrate, symmetrical, very slightly constricted subapically, without median translucent ‘window’ in dorsal view ( LAFER 2002: 53, Fig. 2D ) ( Russia: south-western Primorye region). .................................... P. nigromontanum Lafer, 2002

– Body dark brown to black in mature specimens (pale brown in teneral adults); antenna and legs uniformly concolorous; lateral margin of elytra serrate only to 1/3 of its length; aedeagus different, but paramera longer than half of the median lobe ( LAFER 2002: 53, Figs. 2A,E ). ..................................................................................................................... 3

3 Apex of aedeagus very narrow, forming distinctly asymmetrical spike in dorsal view ( LAFER 2002: 53, Fig. 2B ), straight in lateral view ( LAFER 2002: 53, Fig. 2A ) ( Russia: Irkutsk region to Sakhalin, Mongolia, Japan: Hokkaido). ........................... P. sibiricum Székessy, 1935

– Apex of aedeagus wider, subquadrate, slightly asymmetrical, distinctly constricted subapically, with medial translucent ‘window’ in dorsal view ( LAFER 2002: 53, Fig. 2F ), sinuate in lateral view ( LAFER 2002: 53, Fig. 2E ) (forest zone across the Palaearctic Region). ..... ........................................................................................ P. forsstromii (Gyllenhal, 1890)

Figures

Figs. 1–2. Habitus: 1 – Necrophilus sichuanensis Nikolaev, 2003 (J, TBL 10 mm, West of Zhier; JRPC); 2 – N. rupinensis Schawaller, 1986 (♀, TBL 12 mm, Salween – Irrawaddy divide and Taron river; JSPC).