| 1 |
Antennal grooves large, reaching to the lateral margin of hypomeron (Fig.
5A, B, D
).
|
2 |
| - |
Antennal grooves absent or small, not reaching to the lateral margin of the hypomeron (Figs
5E, F
,
6
,
7
,
8A-C
)
|
5 |
| 2 |
Metaventrite with complete femoral lines reaching from posteriomesal portion to anterolateral corner (Fig.
5A, D
)
|
3 |
| - |
Metaventrite without complete femoral lines, at most with short vestiges anterolaterally. (Fig.
5B, C
)
|
4 |
| 3 |
Mesoventral plate wider than long. Prosternum with wide plate without median carina (Fig.
5A
). Mentum with sharply pointed anterolateral corners (Fig.
8D
)
|
Cryptopleurum
Mulsant
|
| - |
Mesoventral plate approximatley as long as wide. Prosternal plate approximately as long as wide, with more or less distinct median carina (Fig.
5D
). Mentum with bluntly rounded anterolateral corners
|
Pachysternum
Motschulsky
|
| 4 |
Median portion of prosternum roof-like, high (Fig.
5C
). Mesoventral plate longer than wide. Metaventrite without any traces of femoral lines (Fig.
5C
). Anterior tibia without anterolateral excision
|
Pacrillum
d'Orchymont
|
| - |
Median portion of prosternum with flat hexagonal plate, not carinate medially (Fig.
5B
). Mesoventral plate slightly wider than long. Metaventrite with vestiges of femoral lines in anterolateral corners (Fig.
5B
). Anterior tibia anterolaterally with emargination
|
Megasternum
Mulsant
|
| 5 |
Metaventrite with postcoxal ridge widely diverging from posterior margin of coxal cavity and forming an arcuate ridge reaching lateral margin of metaventrite (Figs
5E, F
,
6A, B
)
|
6 |
| - |
Metaventrite with postcoxal ridge parallel to posterior margin of coxal cavity or nearly so, reaching anterolateral corner of metaventrite and not forming any arcuate ridge (Figs
6C-F
,
7
,
8A-C
)
|
9 |
| 6 |
Metaventrite with complete femoral lines crossing the arcuate postcoxal ridge and X-shape in form (Fig.
5E
). Mesoventral elevation narrowly elongate or narrow but widely contacting metaventrite
|
Peltocercyon
d'Orchymont
|
| - |
Metaventrite without X-shaped structure, femoral lines absent or short, not crossing with arcuate postcoxal ridge (Figs
5F
,
6A, B
).
|
7 |
| 7 |
Mesoventral plate widely contacting metaventrite (Fig.
6A, B
). Median portion of prosternum at least weakly delimited from lateral portions
|
8 |
| - |
Mesoventral plate separated from metaventrite by a wide deep gap (Fig.
5F
). Median portion of prosternum simply carinate, not delimited from lateral portions
|
Armostus
Sharp
|
| 8 |
Metaventrite with deep triangular impression along its lateral margin (Fig.
6A
)
|
Morastus
d'Orchymont
|
| - |
Metaventrite without such impression (Fig.
6B
)
|
Oosternum
Sharp
|
| 9 |
Median portion of prosternum highly elevated and/or delimited from lateral portions by sharp ridges (Figs
6C-F
,
7A-D
)
|
10 |
| - |
Median portion of prosternum finely carinate, not delimited from lateral portions (Figs
7E, F
,
8A, B
)
|
18 |
| 10 |
Pronotum with deep longitudinal grooves (Fig.
8E
). Bare portion of metaventrite very wide (Fig.
6C
). Tiny beetles: length ca 1.2 mm
|
Emmidolium
d'Orchymont
|
| - |
Surface of pronotum without distinct longitudinal depressions. Bare portion of metaventrite confined to medial part only. Tiny to moderately large beetles |
11 |
| 11 |
Median portion of prosternum in form of very small triangular, very highly elevated projection. Antennal grooves absent (Fig.
6D
). Abdomen with apical emargination
|
Chimaerocyon
Fikacek
, Maruyama,
Vondracek
& Short
|
| - |
Median portion of prosternum never so tiny and not so highly elevated. Antennal grooves present, even though sometimes rather small. Abdomen never with apical emargination |
12 |
| 12 |
Prosternal elevation with lateral margins deeply excised (Fig.
6E, F
)
|
13 |
| - |
Prosternal elevation with lateral margins or ridges straight (Fig.
7A-D
)
|
14 |
| 13 |
Tiny species, 1.2-1.6 mm. Metaventrite with complete femoral lines (Fig.
6E
). Antennal grooves present
|
Paroosternum
Scott
|
| - |
Large species, ca 3.0 mm. Metaventrite without femoral lines (Fig.
6F
). Antennal grooves absent
|
Oreosternum
nom. nov.
|
| 14 |
Elytral series deeply impressed with the impressions contiguous to anterior margin of each elytron (Fig.
8F, G
). Mesoventral elevation longer than wide, rhomboid to suboval (Fig.
7A, B
)
|
15 |
| - |
Elytral series not impressed or impressions of elytral striae series not reaching anterior margin of each elytron. Mesoventral elevation elongate or as long as wide |
16 |
| 15 |
Pronotum highly bulged in lateral view, not forming a continuous curve with elytra. Anterior margin of prosternal elevation strongly projecting anteriad (Fig.
7A
). Mesoventral elevation subrhomboid
|
Bolbonotum
Hansen
|
| - |
Pronotum not highly bulged in lateral view, forming a continuous curve with elytra. Anterior margin of prosternal elevation straight (Fig.
7B
). Mesoventral elevation suboval
|
Kahanga
Hansen
|
| 16 |
Grooves for reception of procoxae ending far before the anterior margin of mesocoxal cavities (Fig.
8C
). Mesoventral plate elongate
|
Gillisius
d'Orchymont (part)*
|
| - |
Grooves for reception of proxocae reaching nearly the mesocoxal cavities (Fig.
7C, D
). Mesoventral elevation approximately as wide as long
|
17 |
| 17 |
Mesoventral elevation nearly semi-elliptical (Fig.
7C
), with wide marginal rim. Postcoxal ridges on the metaventrite meeting mesally and forming a short median longitudinal ridge. Metatibiae densely pubescent ventrally (Fig.
8H
). Large species: 2.5-3.3 mm
|
Australocyon
Hansen
|
| - |
Mesoventral elevation more less pentagonal, without any marginal rim (Fig.
7D
). Postcoxal ridges mesally bending posteriad, remaining separate, forming two short median longitudinal ridges (in one species largely obsolete). Metatibie without dense ventral pubescence. Medium sized to tiny species: 2.0-2.9 mm
|
Nipponocercyon
Sato
|
| 18 |
Abdominal ventrite 1 without median carina. Mesoventral elevation narrowly laminar (Fig.
7E
)
|
Cycreon
d'Orchymont
|
| - |
Abdominal ventrite 1 carinate medially. Mesoventral elevation in form of a lamina or an elongate plate |
19 |
| 19 |
Ventral face of meso- and metatibiae with dense, long pubescence. Ventral morphology similar to Figure
7F
|
Pilocnema
Hansen
|
| - |
Ventral face of meso- and metatibiae never densely pubescent, at most with sparse short setae. Ventral morphology similar to Figures
2
,
3
, and
8A, B
|
20 |
| 20 |
Mesoventral elevation laminar or forming an oval elongate plate; posterior part of the plate rounded or acute (as in Fig.
8A, B
)
|
21 |
| - |
Mesoventral elevation elongate, but sharply cut off posteriorly, contacting metaventrite more or less in a straight line (as in Figs
2F
,
8C
)
|
22 |
| 21 |
Median portion of prosternum with a pair of transverse ridges partly delimiting prosternal process (Fig.
8A
)
|
Pseudocercyon
d'Orchymont
|
| - |
Median portion of prosternum without such ridges, only simply carinate (Fig.
8B
)
|
Cercyon
Leach
|
| 22 |
Mesoventral elevation arrowhead-shaped, with lateral angulate lobes (Figs
2F
,
3C
)
|
Himalcercyon
Hebauer
|
| - |
Mesoventral elevation elongate oval (as in Fig.
8C
); if small lateral lobes are present, they are below the plate
|
23 |
| 23 |
India, continental Southeast Asia and China. |
Gillisius
d'Orchymont (part)
|
| - |
Islands of the Malay Archipelago. |
Pelosoma
Mulsant*
|