Chlaeniina Brullé, 1834

Guéorguiev, Borislav & Will, Kipling, 2025, A new genus and tribal placement for Ceneus speculiferus Fairmaire, 1879, comments on Grundmannius Basilewsky, 1965, Mirachlaenius Facchini, 2011 and Stenoodes Basilewsky, 1953, and a key to the Oriental and Australasian genera of Chlaeniina Brullé, 1834 (Coleoptera, Carabidae), Zoosystema 47 (15), pp. 231-259 : 235-254

Subtribe Chlaeniina Brullé, 1834

Chlaenides Brullé, 1834: 123.

TYPE GENUS. — Chlaenius Bonelli, 1810 (see Bousquet 2012: 962-963).

DIAGNOSIS OF THE SUBTRIBE. — Head with one (posterior) supraorbital setiferous puncture. Mandible without setiferous puncture in scrobe. Maxilla with two-segmented galea. Ultimate maxillary and labial palpomeres inserted centrically in penultimate palpomeres (not obliquely as in panagaeines). Pronotum with posterolateral setiferous puncture (except for Grundmannius ), majority of taxa without anterolateral setiferous puncture, exceptionally – with one ( Chlaeniodus Jeannel, 1949 ) or more ( Chlaenius leucops Widemann, 1823 , species of subgenera Eurydactylus LaFerté-Sénectère, 1851 and Pelasmomimus Grundmann, 1955), and Viridagonum azureoviride Sciaky, Facchini & Anichtchenko, 2024 ) such punctures. Elytral intervals 8 and 9 normal throughout (without any part modified to form а furrow or ridge as in oodines). Elytral epipleuron crossed (except for Grundmannius ) and laterally evident. Fore coxal cavities biperforate. Middle and hind femur posterior margins without notably elongate setae. Adhesive setal pads on ventral surface of male protarsomeres 1-3 of “spongy” type.

In addition, the bulk of species have elytra lacking discal setiferous punctures, with a few exceptions ( Chlaenius luisae Gestro, 1895 , Ch. tetraphacus Alluaud, 1918 , Grundmannius dispar, Lapitachlaenius speculiferus n. comb., Mirachlaenius barbarae , some Holosoma sp. , Viridagonum lumawigi Lassalle, 2015 ). Most species have also metepisternum laterally coadunate with elytral epipleuron (for manifestation of this character see the notes below) as well as mesosternum deeply concave in middle ( Grundmannius dispar and examined species from Callistoides Motschulsky, 1865, Ocybatus LaFerté-Sénectère, 1851 and Pseudochlaeniellus Jeannel, 1949 have a scarcely concave mesosternum).

PROVISIONAL KEY TO THE ORIENTAL AND AUSTRALASIAN GENERA OF CHLAENIINA BRULLÉ, 1834 (BASED ON THE CHARACTERS RECORDED IN PUBLICATIONS AND OUR EXAMINED MATERIAL)

1. Dorsal surface of body more or less densely pubescent (in Holosoma only elytra laterally) and/or more or less coarsely punctate. Elytra maculate or immaculate ........................................................................................ 2

— Dorsal surface of body glabrous. Protonum and elytra impunctate (excl. local micropunctations), smooth. Elytra immaculate ................................................................................................................................................. 5

2. Elytral stria 8 deeper than striae 3–7 and 1–2 anteriorly, as deep as striae 1–2 posteriorly ............................... ................................................................................................................... Hololeius LaFerté-Sénectère, 1851

— Elytral stria 8 shallower than or as deep as other striae ................................................................................. 3

3. Elytral basal margin shallowly arcuate posteriorly, junction with lateral margin at humerus typically obtusely angled, rarely nearly right angled. Anterior width of metepisternum 1.2 times or less its medial length ...... 4.

— Elytral basal margin deeply arcuate posteriorly, junction with lateral margin at humerus acutely angle. Anterior width of metepisternum 1.5 times or more its medial length .................................. Holosoma Semenov, 1889

4. Protarsomere 4 deeply bilobed apically. Basal margin of elytra incomplete ...................................................... ....................... Viridagonum Lassalle, 2015 , in part ( V. azureoviride Sciaky, Facchini & Anichtchenko, 2024 )

— Protarsomere 4 slightly or not bilobed apically (except for subgenus Lithochlaenius Kryzhanovskij, 1976 of genus Chlaenius , which protarsomere 4 deeply bilobed apically but with basal margination of elytra incomplete, absent from medial portion; cfr. Sciaky et al. 2024) ................................................... Chlaenius Bonelli, 1810

5. Ligula with apical margin excavated (cf. Chaudoir 1857; Ullah et al. 2022). Penultimate labial palpomere plurisetose, with row of long setae on inner border (cf. Kirschenhofer, 2010; Facchini, 2011) ............................... ...................................................................................................................... Harpaglossus Motschulsky, 1858

— Ligula with apical margin straight. Penultimate labial palpomere glabrous on inner border, with at most one to three very small and short setae at apex ....................................................................................................... 6

6. Elytral striae (except for parascutellar striole) linear, well-impressed; interval 3 with large, foveate, discal setiferous punctures. Dorsal surface of body faintly metallic, unicolored .............................. Lapitachlaenius n. gen.

— Elytral striae punctiform, shallowly impressed; interval 3 usually without discal setiferous punctures or occasionally in Mirachlaenius barbarae , one or two, scarcely perceptible discal punctures in interval 3. Dorsal surface of body vividly metallic, unicolored or bicolored ............................................................................................. 7

7. Dorsal surface of body unicolored, completely green. Antennae and legs bicolored. Mentum tooth at apex slightly bifid ............................................... Viridagonum Lassalle, 2015 , in part ( V. lumawigi Lassalle, 2015 )

— Dorsal surface of body bicolored, head and pronotum bluish-green, elytra red-copper. Antennae and legs unicolored, black. Mentum tooth at apex widely round ......................................... Mirachlaenius Facchini, 2011