Calodera
Creators: name: Assing, Volker
Publisher: name: Zenodo
Year: 2003
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Staphylinidae
Calodera

description: Key to the Palaearctic species of Calodera
The key below does not account for the doubtful species Calodera coccinea from Taiwan (see introduction). The figures of the genitalia published in Assing (1996) and Assing (2003) are referred to as A96 and A03, respectively. Additionally, the following abbreviations are used: HL: head length from anterior margin of clypeus to posterior constriction or posterior margin; HW: head width; PW: width of pronotum; AL: length of median lobe of aedeagus.
1 Head posteriorly without distinct neck, only with fine carina. Whole body with extremely fine and dense puncturation and with very fine, dense, and short pubescence ....................................................................................................................................... 2
­ Head posteriorly with distinct — though sometimes rather wide — neck. Puncturation and pubescence less fine and dense.............................................................................. 3
2 Abdominal tergite VI with distinct anterior impression; head at least as wide as long, usually slightly transverse; pronotum matt due to more pronounced puncturation and microsculpture. ♂: aedeagus as figured in A96: 2. Northern, Western, and Central Europe ................................................................................................ C. protensa Mannerheim
­ Abdominal tergite VI without distinct anterior impression; head weakly oblong; pronotum with finer puncturation and microsculpture, and with subdued shine. ♂: aedeagus as figured in A03: 1–2. South of Northern Europe, Central Europe, north of Southern Europe ............................................................................. C. rubens Erichson
3 Pronotum almost completely matt due to extremely dense puncturation; neck more than 0.7 times as wide as head. Largest species of the genus, 4.1–5.4 mm; HL:> 0.44 mm, HW:> 0.49 mm; PW:> 0.57 mm. ♂: aedeagus very large (AL:> 0.58 mm) and with strongly bent median lobe (Figs.: A96: 1). Northern and Central Europe, France. Unconfirmed literature records also from Siberia .................... C. nigrita Mannerheim
­ Pronotum with much finer and sparser puncturation, and with some shine; neck narrower and in most species much longer; smaller species of up to 4.5 mm. Aedeagus smaller (AL: <0.55 mm) and of different shape .......................................................... 4
4 Neck wider, about 0.65–0.70 times the width of head and relatively short. Species confined to the extreme north and east of the Western Palaearctic and to the Eastern Palaearctic region.................................................................................................................. 5
­ Neck narrower and longer, at most about 0.6 times the width of head. Western Palaearctic species ................................................................................................................ 8
5 Larger species, 3.0–4.0 mm. Pronotum relatively wider, usually about 1.25 times as wide as head, and weakly tapering posteriad. ♂: aedeagus: Figs. in A96: 3. North Europe; doubtful records also from eastern Siberia ................ C. lapponica J. Sahlberg
­ Smaller species, 2.7–3.2 mm. Pronotum relatively narrower, approximately 1.15 times as wide as head and distinctly tapering posteriad. Aedeagus different. East of Western Palaearctic and Eastern Palaearctic region................................................................... 6
6 Slightly larger species. Elytra at suture approximately as long as pronotum. Abdominal tergites III–VI without microsculpture. ♂: aedeagus larger and with apical internal structures of distinctive shape (Figs.: A03: 4–6). Japan ................ C. desdemona Sharp
­ Slightly smaller species. Elytra at suture slightly (approximately 0.9 x) shorter than pronotum. Abdominal tergites III – VI with microsculpture. ♂: aedeagus smaller and with apical internal structures of different shape. Unknown from Japan ..................... 7
7 ♂: aedeagus smaller; apex of ventral process of aedeagus in lateral view more slender; apical internal structures in ventral view more slender (Figs.: A03: 4–6). Known only from Primorskiy Kray, Russian Far East ............................................ C. zerchei Assing
­ ♂: aedeagus larger; apex of ventral process of aedeagus in lateral view less slender; apical internal structures in ventral view broader (Figs. 3–5). Known only from Komi Republic ........................................................................................... C. lunata sp. n.
8 Larger species, 3.4–4.4 mm; HL:> 0.43 mm; HW:> 0.445 mm; PW:> 0.50 mm; hind tarsi longer. ♂: median lobe larger (AL:> 0.59 mm), with characteristic apical structures (Figs.: A96: 4). Northern parts of Western Palaearctic ...... C. uliginosa Erichson
­ Smaller species, <3.8 mm; HL: <0.43 mm; HW: <0.445 mm; PW: <050 mm; hind tarsi shorter. ♂: median lobe smaller (AL: <0.59 mm); apical structures different ............. 9
9 Larger species, 2.8–3.8 mm; HL:> 0.36 mm; HW:> 0.36 mm; PW:> 0.42 mm; abdomen ± shiny. ♂: median lobe larger (AL:> 0.44 mm) ................................................ 10
­ Smaller species, <3.0 mm; HL: <340 m; HW: <360 m; PW: <410 m; abdomen ± mat due to ± distinct microsculpture and denser punctation. ♂: median lobe smaller (AL: <440) ................................................................................................................ 11
10 Abdomen, particularly tergites III and VI usually with sparser punctation and more shiny. ♂: apical structures of characteristic shape, in normal position not crossed, but ± parallel apically (Figs.: A96: 5, 5a). Northern parts of Western Palaearctic; doubtful records from Southern Europe and North Africa ............................ C. riparia Erichson
­ Abdomen with denser punctation and usually less shiny. ♂: apical structures spoonlike, in normal position distinctly crossed apically (Figs.: A96: 6, 6a). Widespread in the Western Palaearctic .................................................................. C. rufescens Kraatz
11 Head relatively slender (HW/ PW: 0.82–0.83). ♂: median lobe small (AL: 0.325 ­ 0.355 mm); apical internal structures of distinctive shape, apically only weakly crossed (Figs.: A96: 9, 11b). Known only from the west of Central Europe .................. ....................................................................................................... C. stiliformis Assing
­ Head broader in relation to pronotum (HW/PW:>0.83). ♂: apical internal structures apically distinctly crossed .......................................................................................... 12
12 ♂: median lobe larger (AL: 0.395 –0.415 mm); apical internal structures with large spoon­like dilatations (Figs.: A96: 8, 11a). Central Europe ......... C. cochlearis Assing
­ ♂: median lobe smaller (AL: <0.390 mm); apical structures different, with smaller apical dilatations ............................................................................................................. 13
13 ♂: median lobe larger (AL: 0.350 –0.385 mm); apical structures as figured in A96: 7, 11c. Widespread in the Western Palaearctic ......................... C. aethiops (Gravenhorst)
­ ♂: median lobe smaller (AL: 0.300 – 0.330 mm, rarely 0.340 mm); apical structures as figured in A96: 10, 11d. Widespread in the south and southeast of the Western Palaearctic, from Italy and Austria to Kazakhstan ........................................ C. ligula Assing
description: Published as part of Assing, Volker, 2003, A revision of Calodera Mannerheim. III. A new species from Russia and a key to the Palaearctic species of the genus (Coleoptera: Staphylinidae: Aleocharinae), pp. 1-7 in Zootaxa 311 (1) on pages 4-6, DOI: 10.11646/zootaxa.311.1.1, http://zenodo.org/record/5014441