Pseudomedon MULSANT & REY 1878
Creators: name: Assing, V.
Publisher: name: Zenodo
Year: 2009
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Staphylinidae
Pseudomedon

description: Key to the Palaearctic species of Pseudomedon   
1 Pale-coloured species, forebody or whole body yellowish, reddish, or yellowish-brown...2  
- Dark-coloured species, at least head and abdomen dark brown to blackish........................8  
2 Antennae short, approximately 1.0 mm long; antennomere IV usually less than twice a slong as broad. Distribution: Kazakhstan and Afghanistan.................................................3  
- Antennae longer, at least approximately 1.2 mm long; antennomere IV at least twice as long as broad, usually distinctly more slender. W-Palaearctic, eastwards to Iran...............4  
 3 Aedeagus as in Fig. 8. Kazakhstan............................................... P. kazakhstanicus ASSING   
 - Aedeagus as in Fig. 9. Afghanistan.................................................... P. afghanicus ASSING   
 4 Eyes very small, approximately as large as antennomere I in cross-section (Fig. 13). Aedeagus unknown. N-Algeria: Kabylie (Map 2)............................... P. pallidus (FAUVEL)   
- Eyes often small, but always larger than antennomere I in cross-section. Distribution different...............................................................................................................................5  
5 Species from the Western Mediterranean west of Italy.......................................................6  
- Species from the Eastern Mediterranean east of Italy.........................................................7  
 6 Elytra distinctly shorter, approximately 0.85 times as long as pronotum (Fig. 16). Antennae shorter, approximately 1.3 mm long; antennomeres III-V 2-2.5 times as long as broad. Aedeagus as in Fig. 5. S-Spain: Andalucía (Map 2)................ P. lecoqi COIFFAIT - Elytra approximately as long as pronotum. Antennae long and slender, approximately 1.5-1.6 mm long; antennomeres III-V approximately 3 times as long as broad or nearly so. Aedeagus as illustrated in COIFFAIT (1984: figures 35G-I). SE-France: Provence (Map 2)................................................................................................ P. chobauti COIFFAIT   
 7 Aedeagus as in Fig. 7. Eastern Mediterranean, from the Greek islands Karpathos and Lesbos to Iran (Map 1).............................................................................. P. dido (SAULCY)   
 - Aedeagus as in Figs 1-2. Balkans.......... P. obscurellus (ERICHSON) (brachypterous morph)   
 8 Antennae conspicuously long and slender; antennomeres III-VI approximately three times as long as broad or nearly so; X weakly oblong. Aedeagus as in Fig. 4. Confirmed records from S-Germany and S-Switzerland.............. P. huetheri (HUBENTHAL)   
- Antennae shorter; antennomeres V-VI approximately twice as long as broad; X as broad as long or transverse..................................................................................................9  
 9 Male sternite VIII with deeply V-shaped posterior incision. Aedeagus highly distinctive, with sickle-shape ventral process (Fig. 6). Known only from the northern parts of the Sahara (S-Algeria, Chad) (Map 2)......................................... P. mirei COIFFAIT   
- Male sternite VIII with shallow or moderately deep posterior incision. Ventral process of aedeagus not sickle-shaped. Widespread and common in most of the Western Palaearctic region..............................................................................................................10  
 10 Male protarsomeres I-IV strongly dilated; posterior margin of male sternite VIII rather shallowly concave (Fig. 19); aedeagus larger, approximately 0.55-0.60 mm long, shaped as in Fig. 3. Body on average of darker coloration, usually blackish-brown to blackish, with dark-brown to blackish-brown legs and antennae. Widespread and rather common in the W-Palaearctic eastwards to Kazakhstan............. P. obsoletus (NORDMANN)   
 - Male protarsomeres I-IV moderately dilated; posterior margin of male sternite VIII Vshaped (Fig. 18); aedeagus distinctly smaller, 0.35-0.42 mm long, shaped as in Figs 1- 2. Body usually of paler coloration; at least pronotum and elytra usually reddish brown to brown; legs and antennae usually reddish to reddish-brown. Widespread and common in the W-Palaearctic................ P. obscurellus (ERICHSON) (macropterous morph)
description: Published as part of Assing, V., 2009, On the Pseudomedon species of the Palaearctic region (Coleoptera: Staphylinidae: Paederinae), pp. 1175-1189 in Linzer biologische Beiträge 41 (2) on pages 1186-1187, DOI: 10.5281/zenodo.5276559