Leiodinae, Fleming, 1821

Newton, Alfred F., Švec, Zdeněk & Fikáček, Martin, 2017, A new genus and two new species of Leiodinae from Chile, with keys to world genera of Sogdini and Leiodinae from Chile and Argentina (Coleoptera: Leiodidae), Acta Entomologica Musei Nationalis Pragae 57 (1), pp. 121-140 : 136-139

Key for the identification of described Leiodinae species known from Chile and Argentina *

1 Tarsal formula 5-5- 5 in both sexes. .......................................................................... 2

– Tarsal formula different, 5-5-4 or 5-4- 4 in both sexes. ........................................... 10

2(1) Tarsomere I as long as or longer than II. Sogdini . .................................................... 3

– Tarsomere I much shorter than II. Mesocoxae very widely separated by about their length. Metatrochanter and metafemur with long, obtrusive curved tooth. Eyes protruding laterally. Aedeagus egg-shaped, apex of median lobe broadly rounded ( PECK & COOK 2003: Fig. 12). Length: 4.2 mm. Argentina and Bolivia. ............................... ................................................. Estadiini : Dietta argentinensis Peck & Cook, 2003

3(2) Mesoventrite with high acute longitudinal carina (angulate in lateral view); mesoventrite deepened between procoxal rest area and longitudinal carina. ......................... 4

– Mesoventrite without high angulate longitudinal carina, at most with low short unobtrusive carina. ............................................................................................................ 8

4(3) Elytra not transversely strigose (e.g. Figs 6A–B ). .................................................... 5

– Elytra transversely strigose (e.g., Figs 5E–F ). .......................................................... 7

5(4) Body bicoloured or with light spots on pronotum and transverse strip on elytra. Parameres approximately as long as median lobe. .......................................................... 6

– Body unicoloured, reddish brown. Parameres distinctly shorter than median lobe (as in HLISNIKOVSKÝ 1964: Fig. 7 ). Length: 1.9–2.5 mm. Argentina and Chile. ................ ................................................ Metahydnobius basipunctatus ( Hlisnikovský, 1964)

6(5) Head and pronotum unicolorous black or brown. Elytra unicolorous yellowish. Median lobe terminating in strigose oval plate ( JEANNEL 1962: Fig. 34). Length: 5.5 mm. Chile. ........................................................... Metahydnobius bicolor ( Jeannel, 1962)

– Pronotum with light rounded antero-lateral spots. Elytra with transverse bow-shaped dark strip. Median lobe terminating in simply shortly rounded tip ( JEANNEL 1962: Fig. 31). Length: 2.0– 2.6 mm. Chile. ........ Metahydnobius bimaculatus ( Jeannel, 1962)

7(4) Antennal club black. Maximum width of pronotum in middle. Parameres distinctly shorter than median lobe (HLISNIKOVSKÝ 1962: Fig. 2 ). Length: 2.2 mm. Argentina. ................................................ Metahydnobius hybridiformis ( Hlisnikovský, 1964)

– Antennae unicolorous, reddish ( Figs 5E – F ). Maximum width of pronotum at base ( Fig. 5E ). Parameres approximately as long as median lobe ( Fig. 5G ). Length: 1.8– 2.2 mm. Chile and Argentina. ........... Metahydnobius forticornis (Champion, 1918)

8(3) Mesoventrite vertical with short very low unobtrusive longitudinal carina ( Figs 3C– D ), metaventrite without foveae just behind mesocoxae ( Figs 3A,C ). Body highly convex and ovoid ( Figs 1A–B ). Elytra transversely strigose. Median lobe symmetrical, parameres slim ( Fig. 1D ). Length: 3.3–3.6 mm. Chile. ........................................ ....................................................................... Anaballetus chilensis gen. & sp. nov.

– Mesoventrite more or less horizontal with shallow distinctly delimited impression, metaventrite with several foveae just behind mesocoxae. Body dorso-ventrally compressed, elongate and almost parallel-sided ( Figs 6A–B ). ....................................... 9

9(8) Elytra without transverse strigae ( Figs 6A–B ). Median lobe asymmetrical, parameres conspicuously widened ( Fig. 6C ). Length: 2.2–3.2 mm. Chile and Argentina. .......... ...................................................................... Hydnodiaetus brunneus Jeannel, 1962

– Elytra with transverse strigae (similar to Figs 5E–F ). 2 mm. Chile and Argentina. ........................................ Hydnodiaetus consobrinus ( Fairmaire & Germain, 1859)

10(1) Labrum simple, not emarginate. Elytral rows of punctures (if developed) straight. Tibiae with sporadic fine spines.Tarsal formula 5-4-4. Pseudoliodini . ................. 11

– Labrum bilobed, distinctly emarginate. Elytral rows of punctures distinct, strongly curved. Tibiae with numerous strong spines. Tarsal formula 5-5-4. Leiodini ........13

11(10) Elytra with distinct punctured rows. Aedeagus with broader median lobe which does not extend to apices of parameres. .......................................................................... 12

– Elytra irregularly punctured ( Figs 5A–B ). Aedeagus as in Fig. 5C , apex of median lobe narrowed but truncate at apex which extends beyond apices of parameres. Spermatheca as in Fig. 5D . Chile. .............................. Neohydnobius irregularis sp. nov.

12(11) Body bicolored, pronotum yellow, head and elytra brown. Pronotum with indistinct microsculpture. Apex of median lobe convex, broadly rounded ( JEANNEL 1962: Fig. 40). Length: 1.6 mm. Chile. ............................. Neohydnobius brevis Jeannel, 1962

– Body unicolorous brown. Pronotum transversely microsculptured. Apex of median lobe broadly truncate. Length: 2.3 mm. Argentina and Chile. .................................... .................................................... Neohydnobius argentinicus ( Hlisnikovský, 1964)

13(10) Vertex with two large punctures. ............................................................................ 14

– Vertex with four large punctures. ............................................................................ 15

14(13) Metaventrite finely and sparsely punctured laterally. Parameres a little shorter than median lobe ( DAFFNER 1985: Fig. 11). 1.9–2.6 mm. Chile. ......................................... .............................................................................. Ovocyrtusa bicolor Daffner, 1985

– Metaventrite densely and very coarsely punctured laterally. Parameres reach approximately to mid-length of median lobe ( DAFFNER 1985: Fig. 15). Length: 1.6–2.0 mm. Chile. .............................................................. Ovocyrtusa bipunctata Daffner, 1985

15(13) Metaventrite coarsely and sparsely punctured laterally. Parameres distinctly longer than mid-length of median lobe...............................................................................16

– Metaventrite finely and sparsely punctured laterally. Parameres very short, not reaching mid-length of median lobe ( DAFFNER 1985: Fig. 17). Length: 1.7–2.3 mm. Chile. ......................................................................... Ovocyrtusa thayeri Daffner, 1985

16(15) Antennal club black or darkened. Body brown-black. Parameres reaching behind distal quarter of median lobe ( DAFFNER 1985: Fig. 9). Length: 2.0– 2.8 mm. Chile. ........ ......................................................................... Ovocyrtusa atricornis Daffner, 1985

– Antennal club yellow-red. Body red-brown. Parameres shorter reaching approximately distal third of median lobe ( DAFFNER 1985: Fig. 13). Length: 1.8–2.6 mm. Chile. ............................................................................. Ovocyrtusa newtoni Daffner, 1985

Figures

Fig.6. Hydnodiaetus brunneus Jeannel, 1962, male specimen from PN Nahuelbuta.A – body in dorsal view;B – body in lateral view; C – aedeagus in dorsal view.

Fig. 5. Habitus and genitalia of Chilean Leiodinae. A–D – Neohydnobius irregularis sp. nov. (A–C – holotype; D – female paratype). E–G –Metahydnobius forticornis (Champion, 1918), male specimen from PN Nahuelbuta. A, E – body in dorsal view; B, F – body in lateral view; C, G –aedeagus in dorsal view; D – spermatheca.

Fig. 7. Type locality and distribution of Anaballetus chilensis sp. nov. and Neohydnobius irregularis sp. nov. A–B – distribution of both species in Chile; C – flight intercept trap in the Araucaria araucana forest in PN Nahuelbuta (37°49.5′S 73°0.8′W) at which examined specimens were collected; D – general view of the Araucaria forests in the area where specimens were collected (PN Nahuelbuta, view from Piedra de Aguila towards Pehuenco). Photos by M. Fikáček.

Fig.2.Anaballetus chilensis gen.& sp.nov., paratypes (A–D – male; E – female).A – head in ventral view; B – antenna, ventral view; C – detail of mouthparts; D – detail of antennomere 11 in ventral view; E – hind wing. Not to scale.

Fig.3. Anaballetus chilensis gen. & sp. nov., male paratype.A – meso- and metathorax in ventral view; B – prothorax and anterior leg; C–D – detail of median part of meso- and metaventrite (C – ventral view; D – ventrolateral view); E – protarsus; F – mesothoracic leg; G – mesotarsus; H – metathoracic leg and abdomen.Not to scale.Abbreviations: msvc – mesoventral carina; prre – procoxal rests; trgr – tarsal groove of protibia.

Fig. 1. Anaballetus chilensis gen. & sp. nov., holotype (A–D) and female paratype (E–I). A–B – body in dorsal and lateral view; C – head in dorsal view; D – aedeagus in dorsal view; E – mandibles; F – labium; G – maxilla; H – antenna; I – ovipositor in ventral view. Scale bars: 1 mm applies to A–B, 0.25 mm to D–I.