Adalmus, Reitter, 1882

Byeon, Ui-Joung, Chandler, Donald S., Leschen, Richard A. B. & Park, Jong-Seok, 2024, Revision of the New Zealand genus Adalmus with description of six new species (Coleoptera: Staphylinidae: Pselaphinae), Acta Entomologica Musei Nationalis Pragae 64 (1), pp. 17-32 : 19-20

Key to species of the genus Adalmus

1 Mesotrochanter with posterior margin rounded, lacking spine ( Figs 5C , 8C ). ............................................ 2

– Mesotrochanter with posterior margin angulate or with distinct spine ( Figs 2C , 3C , 4C , 6C , 7C , 9C ; arrow).....3

2 Body size larger (2.40 mm); antennomere I about three times longer than II ( Fig. 8G ); male metatrochanter with distinct spine ( Fig. 8N ; arrow); space between lateral metaventral foveae narrow (1/7 of meso- and metaventral widths) ( Fig. 8C ). ........... A. serrilumbus sp. nov.

– Body size smaller (1.60–1.85 mm); antennomere I about twice longer than II ( Fig. 5A ); male metatrochanter with thin curved spine ( Fig. 5D ); space between lateral metaventral foveae moderately wide (1/4 of meso- and metaventral widths). ...................... .................................. A. mangamukaensis sp. nov.

3 Male protrochanter with distinct spine ( Fig. 4B ); body size larger, more than 2.5 mm long ( Fig. 4A ). ............ .......................................... A. karekarensis sp. nov.

– Male protrochanter with posterior margin rounded, lacking spine; body size less than 2.3 mm. .............. 4

4 Male metatrochanter with distinct spine ( Fig. 6D ). .... ........................................ A. puberilumbus sp. nov.

– Male metatrochanter with posterior margin rounded, lacking spine. ........................................................... 5

5 Profemur clavate in both sexes ( Fig. 7B ; arrow); metafemur swollen ( Fig. 7D ). .. A. rugiceps ( Broun, 1921)

– Profemur linear in both sexes, not clavate; metafemur not swollen. ............................................................. 6

6 Apex of median lobe blunt; right paramere longer than left paramere; left paramere bifurcate, spine curved ventrally ( Figs 2E–G ). ........... A. bullerensis sp. nov.

– Apex of median lobe acutely pointed; left paramere simple. ...................................................................... 7

7 Apex of median lobe bifurcate, with short spines at 1/3 and 2/3 apical; left paramere as wide as median lobe in ventral view ( Figs 9E–G ). ........................................... ....................................... A. velutinus Reitter, 1885

– Apex of median lobe simple, with short spine at base, long spine at basal 1/4, incurved apical spine, with small foramen near apical 1/3; left paramere broader than median lobe in ventral view ( Figs 3E–G ). ........... ............................................ A. kanierensis sp. nov.

Figures

Fig. 5. Adalmus mangamukaensis sp. nov. A – male dorsal habitus; B – front leg; C – middle leg; D – hind leg; E–G – aedeagus in ventral (E), lateral (F) and dorsal (G) view.

Fig. 8. Adalmus serrilumbus sp. nov. A – head; B – prosterum; C – meso- and metaventrite; D – elytra; E – abdominal ventrites; F – abdominal tergites; G – antennae; H – mandibles; I – labrum; J – labium; K – maxillae; L – front leg; N – middle leg; M – hind leg; O–P – aedeagus in ventral (O) and lateral (P) view.

Fig. 2. Adalmus bullerensis sp. nov. A – male dorsal habitus; B – front leg; C – middle leg; D – hind leg; E–G – aedeagus in ventral (E), lateral (F) and dorsal (G) view.

Fig. 3. Adalmus kanierensis sp. nov. A – male dorsal habitus; B – front leg; C – middle leg; D – hind leg; E–G – aedeagus in ventral (E), lateral (F) and dorsal (G) view.

Fig. 4. Adalmus karekarensis sp. nov. A – male dorsal habitus; B – front leg; C – middle leg; D – hind leg; E–G – aedeagus in ventral (E), lateral (F) and dorsal (G) view.

Fig. 6. Adalmus puberilumbus sp. nov. A – male dorsal habitus; B – front leg; C – middle leg; D – hind leg; E–G – aedeagus in ventral (E), lateral (F) and dorsal (G) view.

Fig. 7. Adalmus rugiceps (Broun, 1921). A – male dorsal habitus; B – front leg; C – middle leg; D – hind leg; E–G – aedeagus in ventral (E), lateral (F) and dorsal (G) view.

Fig. 9. Adalmus velutinus Reitter, 1885. A – male dorsal habitus; B – front leg; C – middle leg; D – hind leg; E–G – aedeagus in ventral (E), lateral (F) and dorsal (G) view.