Scaphobaeocera Csiki, 1909

Löbl, Ivan, 2023, On the Scaphidiinae (Coleoptera: Staphylinidae) of Java, Indonesia, Acta Musei Moraviae, Scientiae biologicae 108 (1 - 2), pp. 1-34 : 21-22

Scaphobaeocera Csiki, 1909

Most members of the genus have elytra with parasutural striae and strigulate microsculpture. Such species may be easily distinguished from other taxa sharing a laterally compressed body. Species of Scaphobaeocera lacking these characters may be distinguished from other taxa with laterally compressed body by their large mesepimera and the prominent basal angles of the pronotum, in combination with an aciculate maxillary palpomere IV. The genus comprises 123 Old World, Australian and Pacific species. The single known Javanese species, S. kraepelini (Pic, 1933) from Buitenzorg [= Bogor], was redescribed by LÖBL (2015). This species was not found in the examined samples which comprise five new species.

Key to Javanese species of Scaphobaeocera

1 Dorsum of body light brown, lacking microsculpture, not iridescent. Elytra lacking parasutural striae. ........................................... 2

Dorsum of body blackish to black, elytra with microsculpture, to part or entirely iridescent. Elytra with parasutural striae. .................. .. 3

2 Metanepisternum with convex suture; antennomere IX 1.8 times as long as antennomere VIII. Aedeagus with narrow, convoluted flagellum. ........................ .................................................................. S. kraepelini (Pic)

Metanepisternum strongly narrowed anteriad; antennomere IX about 1.6 times as long as antennomere VIII. Aedeagus with robust, proximally angulate flagellum. ........................................................................ S. larga sp. nov.

3 Antennomeres VI and VIII conspicuously short, antennomere VIII about 1.4 times as long as wide and as long as fifth of antennomere VII. ..................... ........................................................................... .. S. montisgenei sp. nov.

Antennomeres VI and VIII elongate, antennomere VIII about 2.5 times as long as wide and in length exceeding half of antennomere VII. ...... .. 4

4 Basal bulb of aedeagus with apicoventral, prominent tooth­like process. Apex of apical process acute, apex of parameres truncate. Hypomera with microsculpture. ...................................................... S. spinigeroides sp. nov.

Basal bulb of aedeagus without prominent process, apex of parameres rounded. Hypomera lacking microsculpture. ........................... .. 5

5 Aedeagus with apex of apical process truncate, base of flagellum moderately widened. .................. .. S. truncata sp. nov.

Aedeagus with apex of apical process acute, base of flagellum bulbous. ....... ................................................................................................ S. basalis sp. nov.