Cephenniini Reitter 1882
Creators: name: Jałoszyński, Paweł
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Staphylinidae

description: Updated key to extant genera of Cephenniini
1 All legs with ‘trochantellus’; Neotropical.................................................................. 2
- Legs lacking ‘trochantellus’............................................................................. 6
2 Prosternal process absent.............................................. Pseudocephennium Reitter [Neotropical]
- Prosternal process present, clearly separating procoxae....................................................... 3
3 Prosternal process in lateral view strongly bent or curved posterad, with apex directed posterad or posteroventrad......... 4
- Prosternal process in lateral view nearly straight, with apex directed ventrad...................................... 5
4 Abdomen modified, with conspicuously shortened second visible sternite, additionally hidden under dense fringe of long setae along posterior margin of first visible sternite; prosternal process in ventral view subtriangular, narrowing posterad to rounded apex; procoxal cavities closed posteriorly.............................. Monstrophennium Jałoszyński [Neotropical]
- Abdomen unmodified, first visible sternite lacking posterior fringe of long setae; prosternal process in ventral view nearly parallel-sided or rhomboidal with truncate or slightly emarginate apex; procoxal cavities open posteriorly................................................................................... Paracephennium O’Keefe [Neotropical]
5 Prosternal process in ventral view with deeply bifurcate posterior margin............. Furcodes Jałoszyński [Neotropical]
- Prosternal process in ventral view with truncate or slightly concave posterior margin, not bifurcate................................................................................................ Shyri Jałoszyński [Neotropical]
6 Pronotum with pair of longitudinal C-shaped furrows......................... Eutheimorphus Franz & Löbl [Oriental]
- Pronotum lacking C-shaped furrows...................................................................... 7
7 Pronotum with pair of mediolateral glandular openings....................................................... 8
- Pronotum without mediolateral openings................................................................... 9
8 Antennae 11-segmented, with asymmetrical and loosely assembled dimerous club...... Trichokrater Jałoszyński [Oriental]
- Antennae 10-segmented, with oval and symmetrical club formed by two fused antennomeres...................................................................................................... Trurlia Jałoszyński [Oriental]
9 Antennae 10-segmented, with large club formed by two fused antennomeres.......... Clavomicrus Jałoszyński [Oriental]
- Antennae clearly 11-segmented......................................................................... 10
10 Prothoracic basisternal region about as long as procoxal rests or longer..................... Etelea Csiki [W Palaearctic]
- Prothoracic basisternal region clearly shorter than procoxal rests............................................... 11
11 Prosternal process absent.............................................................................. 12
- Prosternal process present............................................................................. 13
12 Antenna with indistinct trimerous club............................... Cephennium Müller & Kunze [W Palaearctic]
- Antenna with distinct dimerous club................................. Nanophthalmus Motschulsky [W Palaearctic]
13 Pronotum lacking antebasal pits......................................................................... 14
- Pronotum with at least one pair of antebasal pits or foveae.................................................... 18
14 Antennae gradually thickened, lacking abruptly delimited club; prosternal process in ventral view extremely thin, lamellate, in lateral view narrowly subtriangular and strongly projecting ventrad beyond ventral margins of procoxae...................................................................................... Cephazteca Jałoszyński [Neotropical]
- Antennae with dimerous or trimerous clubs; prosternal process in ventral view subquadrate, subtriangular or subrectangular with rounded or truncate tip, in lateral view not strongly projecting ventrally..................................... 15
15 Antennae with trimerous clubs; prothorax with two pairs of internal ‘cavities’ (visible as translucent oval areas on sides in posterior half)........................................................................ genus X1 (Sulawesi)
- Antennae with clearly dimerous clubs; prothorax with at most one pair of internal ‘cavities’......................... 16
16 Prosternal process in ventral view about as long as broad; posterior margins of mesocoxal rests not carinate; aedeagus with internal lentiform sclerotization at base........................................ Papuamicrus gen. n. [New Guinea]
- Prosternal process clearly elongate; posterior margins of mesocoxal rests carinate; aedeagus lacking internal basal lentiform sclerotization........................................................................................ 17
17 Antennal club composed of two unilaterally expanded antennomeres; each prothoracic hypomeron partly divided into anterior and posterior region by transverse carina; notosternal sutures partly obliterated; elytra lacking macrosetae................................................................................... Cephennococcus Jałoszyński [Oriental]
- Antennal club composed of two symmetrical antennomeres; prothoracic hypomera undivided; notosternal sutures developed on entire length; elytra with numerous long macrosetae............................... Indomicrus Jałoszyński [Oriental]
18 Basal elytral foveae large and filled with dense setae........................................................ 19
- Basal elytral foveae, if discernible, asetose................................................................ 20
19 Prosternal process short, not projecting ventrally beyond procoxae and not bent................................................................................................... Hlavaciellus Jałoszyński [Oriental, Himalaya]
- Prosternal process long, projecting ventrally beyond procoxae and bent posteriorly at obtuse angle........................................................... Cephennodes Reitter [Afrotropical, Palaearctic, Oriental, Nearctic, Australian]
20 Prosternal and mesoventral processes inversely T-shaped in cross-section, so that mesal portions of pro- and mesocoxae are hidden under expanded ventral surface of each process...................................................... 21
- Prosternal and mesoventral processes subtriangular or trapezoidal in cross-section, mesal portions of pro- and mesocoxae visible in ventral view................................................................................ 22
21 Pronotum with sublateral carinae; elytra with subhumeral carinae................... Cephennula Jałoszyński [Oriental]
- Pronotum lacking sublateral carinae; elytra lacking subhumeral carinae.............. Lathomicrus Jałoszyński [Oriental]
22 Each elytron with humeral carina; pronotum with more than two pairs of small but deep lateral foveae.......................................................................................... Foveomicrus Jałoszyński [Oriental]
- Humeral carinae absent; pronotum with at most two pairs of lateral pits......................................... 23
23 Prothorax with posterolateral internal ‘cavities’ (in dried specimens visible as translucent areas in posterior half).............................................................................. Pomphopsilla Jałoszyński [Afrotropical]
- Prothorax lacking internal ‘cavities’............. Cephennomicrus Reitter [Afrotropical, Palaearctic, Oriental, Australian]
description: Published as part of Jałoszyński, Paweł, 2023, Papuamicrus gen. n., a new genus of Cephenniini from New Guinea (Coleoptera: Staphylinidae: Scydmaeninae), pp. 492-500 in Zootaxa 5339 (5) on pages 497-498, DOI: 10.11646/zootaxa.5339.5.6, http://zenodo.org/record/8309467